SERVICE SUPPORT HANDBOOK. w w w. m h i a a. c o m. a u

Transcription

1 SERVICE SUPPORT HANDBOOK w w w. m h i a a. c o m. a u

2 The information contained within this Service Support Handbook is for the use by qualified licenced personnel only. Additionally, the information presented here is not a replacement or substitute to the Manufacturers Technical Manual literature. Please do not remove any covers, or attempt any repair or measurement on any MHI LTD. product, unless you are suitably qualified and licenced to do so. Note that applicable models released from 2014 are DRED (AS4755) compliant. This means that the outdoor unit has 4 extra terminals as per example indicated below. Please only connect a DRED specified relay to these terminals if and where applicable. They are not to be connected to the indoor unit. The outdoor unit to indoor unit interconnecting terminal block is to the left/top on RAC products and a separate terminal block on PAC products. RAC products Terminal block wiring connections (example) Interconnecting wiring to indoor unit [1 2 3 E] DRED terminals [D1 D2 D3 C] Power supply [A N E] RAC Products Display pattern of the indoor unit run and r light during an external DRM input Page 1 of 37

3 1:1 Split Systems - Remote Controls of SRK, DXK, SRF, SRR Before Proceeding to RAC Self Diagnosis Information, ensure the correct Remote Control is being used Indoor Unit Model No. Remote Control P/No. RC Sub. Refrigerant Cycle Inverter Type SC-BIKN D.R.E.D. TM SRK--ZAA RKS502A503 R22 Reverse cycle Wall mount No No SRK--ZD-S, SRK--ZDX-S RMA502A C R410A Reverse cycle Wall mount No No SRK--ZEA-S, SRK--ZEA-S1 RKW502A D R410A Reverse cycle Wall mount No No SRK--ZFX-S, SRK--ZGX-S RKW502A200B R410A Reverse cycle Wall mount No No SRK--ZHX-S R410A Reverse cycle Wall mount Yes No SRK--ZIX-S R410A Reverse cycle Wall mount Yes No SRK--ZJX-S, SRK-- ZJX-S1 RKX502A001C 007C R410A Reverse cycle Wall mount Yes No SRK--ZG-S R410A Reverse cycle Wall mount No No SRK--ZJ-S, SRK--ZJ-S1 R410A Reverse cycle Wall mount Yes No SRK--ZK-S R410A Reverse cycle Wall mount Yes No RKW502A D SRK--ZL-S R410A Reverse cycle Wall mount Yes No SRK--ZMA-S R410A Reverse cycle Wall mount Yes Yes RLA502A700B 700R SRK--ZMXA-S R410A Reverse cycle Wall mount Yes Yes SRF--ZMXA-S RLA502A700C 700S R410A Reverse cycle Floor mount Yes Yes SRR--ZM-S RLA502A701C 700C R-410A Reverse cycle Ceiling concealed Yes Yes SRK--ZMP-S RKX502A001P 007P R410A Reverse cycle Wall mount No No SRK24YMA-S RLA502A700D 700T R410A Cool only Wall mount Yes Yes SRK--YJ-S, SRK--YL-S RKX502A R410A Cool only Wall mount No No SRK--ZSA-W RLA502A701L R32 Reverse cycle Wall mount Yes Yes Avanti SRK--ZRA-W RLA502A700R R32 Reverse cycle Wall mount Yes Yes Bronte SRK--ZSXA-W R32 Reverse cycle Wall mount Yes Yes Avanti + SRK24YRA-W RLA502A700T R32 Cool only Wall mount Yes Yes Bronte SRK--YSA-W R32 Cool only Wall mount Yes Yes Avanti DXK--Z3-S, DXK--Z5-S RKX502A001P 007P R410A Reverse cycle Wall mount No No DXK--ZJ-S RKX502A001C 007C R410A Reverse cycle Wall mount Yes No DXK--Z4-S R410A Reverse cycle Wall mount Yes No RKW502A D DXK--ZL-S R410A Reverse cycle Wall mount Yes No DXK06ZM-S RLA502A701B 700B R410A Reverse cycle Wall mount Yes No DXK--ZMA-S RLA502A700B 700R R410A Reverse cycle Wall mount Yes Yes DXK--ZSA-W RLA502A701L R32 Reverse cycle Wall mount Yes Yes Avanti DXK--ZRA-W RLA502A700R R32 Reverse cycle Wall mount Yes Yes Bronte Page 2 of 37

4 RKX502A001C RKW502A200 Page 3 of 37

5 RLA502A700B / RLA502A701C RLA502A701L Page 4 of 37

6 Model Refrigerant Piping Information - Current Models Gas Type Precharged Piping Length (m) Max Piping Length (m) Vertical Pipe Length (m) O/D above I/D above Factory Charge (Kg) Additional Charge (gr per m) Pipe Sizes (mm) SRC95ZRA-W R SRC71,80ZRA-W R SRC24YRA-W R SRC63ZRA-W R SRC50ZSA-W R SRC25,35ZSA-W R SRC20ZSA-W R SRC18YSA-W R SRC13YSA-W R SRC10YSA-W R DXC33ZRA-W R DXC24,28ZRA-W R DXC21ZRA-W R DXC18ZSA-W R DXC09,12ZSA-W R DXC06ZSA-W R DXC05Z5-S R410A SRC50,60ZMXA-S R410A SRC25,35ZMXA-S R410A N/A SRC17ZMP-S, 20ZMP-S R410A SCM Multi Head Series *Note that the maximum one way piping length for individual ports is 25 metres Model Gas Type Precharged Piping Length (m) Max Piping Length (m) for all rooms Vertical Pipe Length (m) O/D Above I/D Above Factory Charge (Kg) Additional Charge (gr per m) Liquid Pipe Gas Pipe Pipe Sizes (mm) SCM100,125ZM-S R410A SCM71,80ZM-S1 R410A SCM60ZM-S R410A N/A SCM50ZS-S R410A N/A SCM40,45ZS-S R410A N/A Model Gas Type Precharged Piping Length (m) PAC Current Models Maximum Piping Length (m) Vertical Pipe Length (m) O/D Above I/D Above Factory Charge (Kg) Additional Charge (gr per m) Liquid Pipe Gas Pipe Pipe Sizes (mm) FDCA71VNXA R410A FDCA100VN R410A FDC100VNP R410A Liquid Pipe Gas Pipe FDCA100,125,140VNX FDCA100,125,140VSX R410A FDCA160VSA FDCA200VSA R410A / Page 5 of 37

7 Model No. Precharged Piping Length (m) Refrigerant Piping Information R410A Max Piping Length (m) Historical Models Vertical Pipe Length (m) O/D Above O/D Above Vertical Pipe Length (m) Additional Charge (gr per m) Pipe Size (mm) SRC92ZMA-S SRC80ZMA-S SRC24YMA-S SRC63,71ZMA-S SRC50ZMA-S SRC25,35 ZMA-S N/A SRC20ZMA-S N/A SRC50,60ZMXA-S SRC20,25,35ZMXA-S N/A SRC18YL-S/YJ-S SRC13YL-S/YJ-S N/A SRC10YL-S/YJ-S SRC20,25,ZD/ZF/,ZG N/A SRC20,25ZJ-S N/A SRC35ZD/ZG N/A SRC35ZJ-S N/A SRC20ZJ-S N/A SRC25,35ZJ-S N/A SRC50ZD,ZJ-S,ZJ-S SRC20,25,35ZDX/ZFX/ZGX/ZIX /ZJX-S/ZJX-S1 Liquid Pipe Gas Pipe N/A SRC50,60ZFX,ZGX,ZHX,ZIX SRC50,60ZJX-S SRC63,71,80ZEA-S/S1/S SRC63,71,80ZK-S SRC80ZL-S SRC92ZL-S DXC32ZMA-S DXC28ZMA-S DXC21,24ZMA-S DXC18ZMA-S DXC09,12ZMA-S N/A Page 6 of 37

8 Model No. Refrigerant Piping Information R410A Precharged Piping Length (m) Historical Models Max Piping Length (m) Vertical Pipe Length (m) O/D Above I/D Above R410A Factory Charge (Kg) Additional Charge (gr per m) Pipe Size (mm) DXC06ZM-S N/A DXC05Z5-S DXC32ZL-S DXC28ZL-S DXC21,24,28Z4-S DXC18Z3-S/ZJ-S DXC09,12ZJ-S N/A DXC12Z3-S N/A DXC09Z3-S DXC24VNX DXC34,43,48VNX DXC55VS 30 35/ SCM40ZG-S N/A SCM45ZG-S SCM48ZG-S N/A SCM60ZG-S SCM80ZG-S SCM40ZJ-S N/A SCM50,60ZJ-S/ZJ-S N/A SCM71,80ZJ-S/ZJ-S SCM100,125ZJ-S/ZJ-S SCM40ZM-S N/A SCM50_60ZM-S N/A SCM71_80ZM-S FDCA71VNX FDCVA151,201HEN FDCVA251HEN FDCVA302HENR/HENAR FDCVA402,502,602HENR/HENAR Liquid Pipe Gas Pipe Page 7 of 37

9 Inverter RAC Indoor Unit Inverter RAC Outdoor Unit Indoor unit display panel Timer Run Light Light ON ON ON ON ON ON SRK SRF DXK SRC DXC Outdoor Control PCB, Red LED RAC - SELF-DIAGNOSIS INFORMATION ZD, ZF, ZG, ZJ, ZJ-S1,ZMA,ZSA,ZDX,ZFX,ZGX,ZHX,ZIX,ZJX,ZJX-S1,ZMXA,ZSXA,ZEA,ZE-S1,ZE-S2,ZK,ZL,YJ,YL,YR,YS ZIX, ZJX, ZJX-S1,ZMXA,ZSXA Z3,Z4,ZJ,ZL,ZM,ZMA,ZSA,ZRA ZD, ZF, ZG, ZJ, ZJ-S1,ZMA,ZSA,ZDX,ZFX,ZGX,ZHX,ZIX,ZJX,ZJX-S1,ZMXA,ZSXA,ZEA,ZE-S1,ZE-S2,ZK,ZL,YJ,YL,YR,YS Wired R/C display ON ON ON Z3,Z4,ZJ,ZL,ZMA,ZSA,ZRA Description of Trouble Cause Display () condition Heat exchanger sensor 1 error Room temperature sensor error Heat exchanger sensor 2 error ON - E 9 Drain trouble ON -- E E 38 E 37 E 39 Indoor fan motor error Outdoor air temperature sensor error Outdoor heat exchanger sensor error Discharge pipe sensor error E 42 Current cut E 59 E 58 E 51 E 36 E 3, E 5 Trouble of outdoor unit Current safe stop Power transistor error Over heat of compressor Error of signal transmission Broken heat exchanger sensor 1 wire, poor connector connection *Indoor PCB is faulty Broken room temperature sensor wire, poor connector connection *Indoor PCB is faulty Broken heat exchanger sensor 2 wire, poor connector connection. *Indoor PCB is faulty Defective drain pump (DM), broken drain pump wire Anomalous float switch operation. Defective indoor PCB faulty Defective fan motor, poor connector connection Broken outdoor air temp sensor wire, poor connector connection Outdoor PCB is faulty Broken heat exchanger sensor wire, poor connector connection. Outdoor PCB is faulty Broken discharge pipe sensor wire, poor connector connection. Outdoor PCB is faulty Current Cut Broken compressor wire Compressor blockage Overload operation Overcharge Compressor locking Broken power transistor Gas shortage, defective discharge pipe sensor, service valve is closed Defective power supply, Broken signal wire, defective indoor/outdoor PCB When a heat exchanger sensor 1 wire disconnection is detected while operation is stopped. (If a temperature of 28ºC or lower is detected for 15 seconds, it is judged that the wire is disconnected.) (Not displayed during operation.) When a room temperature sensor wire disconnection is detected while operation is stopped. (If a temperature of 45ºC or lower is detected for 15 seconds, it is judged that the wire is disconnected.) (Not displayed during operation.) When a heat exchanger sensor 2 wire disconnection is detected while operation is stopped. (If a temperature of 28ºC or lower is detected for 15 seconds, it is judged that the wire is disconnected.) (Not displayed during operation.) If the float switch OPEN is defected for 3 seconds continuously or if float switch connector or wire is disconnected. When conditions for turning the indoor unit s fan motor on exist during air conditioner operation, Defective fan motor, poor an indoor unit fan motor speed of 300 min-1 or lower is measured for 30 seconds or longer. (The air conditioner stops.) 55ºC or lower is detected for 5 seconds continuously 3 s within 40 minutes after initial detection of this anomalous temperature. Or 55ºC or lower is detected for within 20 seconds after power ON. (The compressor is stopped.) 55ºC or lower is detected for 5 seconds continuously 3 s within 40 minutes after initial detection of this anomalous temperature. Or 55ºC or lower is detected for within 20 seconds after power ON. (The compressor is stopped.) 25ºC or lower is detected for 5 seconds continuously 3 s within 40 minutes after initial detection of this anomalous temperature. (The compressor is stopped.) Compressor locking, open phase on compressor output, short circuit on power transistor, closed service valve, EEV not opening When there is an emergency stop caused by trouble in the outdoor unit, or the input current value is found to be lower than the set value. (The air conditioner stops.) When the compressor command speed is lower than the set value and the current safe has operated. (the compressor stops) When the power transistor is judged breakdown while compressor starts.(the compressor is stopped.) When the value of the discharge pipe sensor exceeds the set value. (The air conditioner stops.) When there is no signal between the indoor PCB and outdoor PCB for 10 seconds or longer (when the power is turned on), or when there is no signal for 7 minute 35 seconds or longer (during operation) (the compressor is stopped). ON 7- ON E 48 Outdoor fan motor error Defective fan motor, poor connector connection When the outdoor unit s fan motor speed continues for 30 seconds or longer at 75 min-1 or lower. (3 s) (The air conditioner stops.) ON 2- E 35 Cooling high pressure protection Overload operation, overcharge, Broken outdoor heat exchange sensor wire, Service valve is closed When the value of the outdoor heat exchanger sensor exceeds the set value E 60 Rotor lock Defective compressor Open phase on compressor Defective outdoor PCB If the compressor motor s magnetic pole positions cannot be correctly detected when the compressor starts. (The air conditioner stops.) 5- ON 2- E 47 Active filter voltage error Defective active filter When the wrong voltage connected for the power supply. When the outdoor PCB is faulty ON E 57 E E 1 Refrigeration cycle system protective control Service valve (gas side) closed operation Error of wired remote control wiring * Service valve is closed. Refrigerant is insufficient * Service valve (gas side) closed Defective outdoor PCB Broken wired remote control wire, defective indoor PCB When refrigeration cycle system protective control operates. If the output current of inverter exceeds the specifications, it makes the compressor stopping. (In heating mode). After 3-minute delay, the compressor restarts, but if this anomaly occurs 2 s within 20 minute after the initial detection. The wired remote control wire Y is open. The wired remote control wires X and Y are reversely connected. Noise is penetrating the wired remote control lines. The wired remote control or indoor PCB is faulty. (The communications circuit is faulty.) Page 8 of 37

10 Inverter Multi Indoor Inverter Multi Outdoor Indoor unit display panel Run Light Comes on Comes on Comes on Timer Light Comes on Comes on Comes on Comes on Comes on Comes on SKM SRRM STM SCM Outdoor main PCB, Red LED MULTI HEAD - SELF-DIAGNOSIS INFORMATION Historical Models Wired Remote control display E 6 E 7 E 9 E 6 ZD, ZF, ZG ZE, ZF ZE, ZF ZD-S / ZF-S / ZG-S Description of trouble Cause Display () condition Indoor heat exchanger sensor (1) error Room temperature sensor error Drain abnormality (STM, SRRM only) Indoor heat exchanger sensor (2) error E 16 Indoor fan motor error E 6 On for 4 sec & for 4 sec E 38 E 37 E 39 E 53 E 41 E 42 E 59 Closed service valve, indoor heat exchanger sensor (1) Outdoor air temperature sensor Outdoor heat exchanger sensor Discharge pipe sensor error Compressor suction sensor Power transistor sensor error Current Cut Trouble of outdoor unit Broken heat exchanger sensor (1) Wire. Connector poor connection Disconnected sensor Broken room temperature sensor Wire. Connector poor connection Drain at reverse gradient. Float switch defective Broken heat exchanger sensor (2) Wire. Connector poor connection Disconnected sensor Defective fan motor. Connector poor connection Closed service valve. Heat exchanger sensor (1) is disconnected. Broken outdoor air temperature sensor wire. Poor connector connection Broken heat exchanger sensor Wire. Poor connector connection Broken discharge pipe sensor wire. Connector poor connection Broken comp. suction sensor wire. Poor connector connection Broken power transistor sensor wire. Connector poor connection -Compressor locking -Open phase on compressor output. Short-circuit on power transistor -Defective power transistor -Broken compressor wire -Compressor blockage Broken heat exchanger sensor (1) wire, poor connection When room temperature sensor temperature of 20 C or under continued for more than 15 seconds while operation is stopped. (This is not displayed during operation.) Float switch motion When heat exchanger sensor (2) temperature of 20 C or under continued for more than 15 seconds while operation is stopped. (This is not displayed during operation.) When air conditioner is operating and indoor fan motor is turned ON, indoor fan motor speed of 300 rpm or under continued for more than 30 seconds. (Air conditioner stops.) After cooling starts, when the temperature difference at the indoor heat exchanger sensor (1) after 13 minutes and after 16 minutes is greater than 2ºC, operation is stopped. When outdoor air temperature sensor temperature of 20 C or under continued for more than 10 seconds while operation is stopped. (This is not displayed during operation.) When heat exchanger sensor temperature of 20 C or under continued for more than 10 seconds while operation is stopped. (This is not displayed during operation.) After the decision speed has been 0 rps or more for 9 continuous minutes and the discharge pipe sensor has sent a 10 second or more broken wire signal. (Compressor is stopped.) When comp. suction sensor temperature of 20 C or under continued for more than 10 seconds while operation is stopped. After the decision speed has been 0 rps or more for 9 continuous minutes and the power transistor sensor has sent a 10 second or more broken wire signal. (Compressor is stopped.) When converter output current which exceeds setting value is detected. (Compressor stops.) When an error with the outdoor unit causes an error stop, or when the input current is measured at 1 A or less for 3 continuous minutes or more. (Compressor is stopped.) Comes on Comes on Comes on Comes on E 58 Current safe stop Overload operation Overcharge E 41 Power transistor error Broken power transistor E 36 E 5 Over heat of compressor Error or signal transmission on E 48 Faulty outdoor fan motor 7- E E 1 Compressor lock Error of wired remote control wiring Gas shortage Defective discharge pipe sensor Defective power supply. Broken signal wire. Defective indoor/outdoor unit Circuit boards. Defective fan motor, poor connector connection Defective compressor Defective outdoor PCB Broken wired remote control wire. Defective indoor unit boards When the decision speed is 30 rps or less and the current save has operated. (Compressor stops) When there is an emergency stop caused by trouble in the outdoor unit, or the input current value is found to be lower than the set value continuously for 3 minutes or longer. (The air conditioner stops.) When discharge pipe sensor value exceeds setting value. (Compressor Stops.) If serial signal cannot be sent or received for 1 minute and 55 seconds continuously. When the outdoor unit s fan motor sped continues for 30 seconds or longer at 75 rpm or lower. (3 s) (The air conditioner stops.) When the motor for the compressor does not turn 1/12 revolution second after it has been started. The wired remote control wire Y is open. The wired remote control wires X and Y are reversely connected. Noise is penetrating the wired remote control lines. The wired remote control or indoor control PCB is faulty. (The communications circuit is faulty.) Page 9 of 37

11 Inverter Multi Indoor Inverter Multi Outdoor Indoor unit display panel Run Light Flashing Flashing Flashing Flashing ON ON ON Run Light MULTI HEAD - SELF-DIAGNOSIS INFORMATION Previous & Current Series SRK ZJ-S,ZJ-S1,ZMA-S,ZMXA-S ZJX-S, ZJX-S1 ZK-S SRR SRF FDTC FDUM FDEN SCM Outdoor main PCB, Red LED Wired remote control display ON - ON - ON - ZJ-S, ZM-S ZJX-S, ZJX-S1,ZMXA-S VD,VF, VF/1 VF, VF/1, VF/2 VD, VF, VF/1, VG ZJ-S / ZJ-S1 / ZM-S / ZM-S1 Description of trouble Cause Display () condition Indoor heat exchanger sensor (1) error Room temperature sensor error ON E 9 Drain error Heat exchanger sensor (2) error ON E 16 Indoor fan motor error E 38 E 37 E 39 E 53 E 42 E 59 E 58 Outdoor air temperature sensor error Outdoor heat exchanger sensor error Discharge pipe sensor error Outdoor suction sensor error Current Cut Trouble of outdoor unit Current safe stop Broken heat exchanger sensor 1 wire, poor connector connection. Indoor PCB is faulty Broken room temperature sensor wire, poor connection Broken heat exchanger sensor 2 wire, poor connector connection. Indoor PCB is faulty. Defective drain pump (DM), broken drain pump wire. Anomalous float switch operation. Defective indoor PCB faulty Defective fan motor, poor connector connection Broken sensor wire, poor connection, faulty outdoor PCB Broken sensor wire, poor connection, faulty outdoor PCB Broken sensor wire, poor connection, faulty outdoor PCB Broken sensor wire, poor connection, faulty outdoor sub PCB Compressor locking, open phase on compressor output, short circuit on power transistor, closed service valve Broken compressor wire, broken power transistor, broken discharge sensor wire or poor connection, compressor blockage Overload protection, over charged, compressor locking When a heat exchanger sensor 1 wire disconnection is detected while operation is stopped. (If a temperature of 28ºC or lower is detected for 15 seconds, it is judged that the wire is disconnected.) (Not displayed during operation.) When a room temperature sensor wire disconnection is detected while operation is stopped. (If a temperature of 45ºC or lower is detected for 15 seconds, it is judged that the wire is disconnected.) (Not displayed during operation.) When a heat exchanger sensor 2 wire disconnection is detected while operation is stopped. (If a temperature of 28ºC or lower is detected for 15 seconds, it is judged that the wire is disconnected.) (Not displayed during operation.) If the float switch OPEN is defected for 3 seconds continuously or if float switch connector or wire is disconnected. When conditions for turning the indoor unit s fan motor on exist during air-conditioner operation, an indoor unit fan motor speed of 300 (SRF:150) min-1 or lower is measured for 30 seconds or longer. (The air conditioner stops.) 55ºC or lower is detected for 5 seconds continuously 3 s within 40 minutes after initial detection of this anomalous temperature. Or 55ºC or higher is detected for within 20 seconds after power ON. (The compressor is stopped.) 55ºC or lower is detected for 5 seconds continuously 3 s within 40 minutes after initial detection of this anomalous temperature. Or 55ºC or higher is detected for within 20 seconds after power ON. (The compressor is stopped.) 25ºC or lower is detected for 5 seconds continuously 3 s within 40 minutes after initial detection of this anomalous temperature. (The compressor is stopped.) 55ºC or lower is detected for 5 seconds continuously 3 s within 40 minutes after initial detection of this anomalous temperature. Or 55ºC or higher is detected for within 20 seconds after power ON. (The compressor is stopped) The compressor output current exceeds the set value during compressor start. (The air-conditioner stops.) When there is an emergency stop caused by trouble in the outdoor unit, or the input current value is found to be lower than the set value. (The air-conditioner stops.) When the compressor command speed is lower than the set value and the current safe has operated. (the compressor stops) ON 4-1- E 51 Power transistor error faulty inverter PCB, faulty main PCB or faulty fan motor When the power transistor is judged breakdown while compressor starts. (The compressor is stopped.) ON 5-5- E 36 Over heat of compressor Low on gas, faulty discharge pipe senor, closed service valve When the value of the discharge pipe sensor exceeds the set value. (The air-conditioner stops.) Page 10 of 37

12 Comes on ON ON E 5 E 48 E 35 E 60 Error or signal transmission Outdoor fan motor or main PCB Cooling high pressure Protection Rotor lock Defective power supply, broken signal wire, faulty indoor/outdoor P.C.B. Faulty condenser fan motor or faulty main PCB Overload protection, over charged, broken outdoor heat exchanger sensor wire, closed service valve Faulty compressor, open phase on compressor, faulty outdoor P.C.B. When there is no signal between the indoor PCB and outdoor PCB for 10 seconds or longer (when the power is turned on), or when there is no signal for 7 minute 35 seconds or longer (during operation)(the compressor is stopped). When the outdoor unit s fan motor speed continues for 30 seconds or longer at 75 min-1 or lower. (3 s) (The air conditioner stops) When the value of the outdoor heat exchanger sensor exceeds the set value If the compressor motor s magnetic pole positions cannot be correctly detected when the compressor starts. (The air-conditioner stops.) 5- ON 2- E 47 Active filter voltage error Defective Active Filter, incorrect power supply When the wrong voltage connected for the power source. When the outdoor main PCB is faulty 7- ON 2- E 57 Refrigerant cycle system protective control Closed service valve, insufficient refrigerant When refrigeration cycle system protective control operates E 41 Power transistor overheat Faulty power transistor or sensor. When anomalous rise of the power transistor temperature is detected 2 s within 1 hour E 40 High pressure error Faulty high pressure sensor, faulty control PCB, poor air circulation. When anomalous rise of the high pressure sensor is detected 5 s within 1 hour. When high pressure sensor anomaly is detected for 10 minutes continuously E 45 Outdoor main or sub PCB communication error Outdoor sub or main PCB faulty, poor connection of wires between outdoor PCBs Communication error for 15 minutes: Detected more than 15 seconds 4 s E E 1 High pressure sensor error Error of wired remote control wiring Faulty high pressure sensor, faulty control PCB. Broken wired remote control wire Defective indoor unit boards If detected for 5 second continuously within 2 minutes to 2 minutes and 20 seconds after the compressor ON, the compressor stops. The wired remote control wire Y is open. The wired remote control wires X and Y are reversely connected. Noise is penetrating the wired remote control lines. The wired remote control or indoor control PCB is faulty. (The communications circuit is faulty.) Flashing - E 21 Limit switch error Defective limit switch, air inlet panel set, I/D control PCB Actuation of limit switch Page 11 of 37

13 Inverter PAC Indoor unit FDT FDTC FDU FDUA FDUM FDEN DXU Remote control Indoor control PCB Error Code Red LED Red LED Green LED (1) Noindication "WAIT" or INSPECT I/U E 1 E 5 E 6 E 7 E 8 E 9 Flashing PAC INDOOR UNIT - SELF-DIAGNOSIS INFORMATION Outdoor control PCB Red LED Green LED (1) Location of trouble Normal operation Indoor unit power supply Remote control wires Remote control Indoor-outdoor units connection wire Remote Control Remote control wires (Noise) Remote control indoor control PCB Indoor-outdoor units connection wire Electrical Noise Outdoor Control PCB Outdoor Control PCB Fuse Indoor heat exchanger temperature thermistor Indoor control PCB Indoor return air temperature thermistor Indoor control PCB Installation or operating condition Indoor heat exchanger temp sensor Indoor control PCB Drain trouble Float switch Indoor control PCB Option 1, 1R, V, VD, VF, VF/1, VG 1, 1R, V, VD, VF, VF/1 1, 1R, V, VD, VF, VF/1, VF/2, VG 1, 1R, V, VD, VF, VF/1, VF/2 1, 1R, V, VD, VF, VF/1, VG VF, VF/1 Normal Operation Description of trouble Power OFF, broken wire, blown fuse, broken transformer wire Poor connection, breakage of remote control wire. For wire breaking at power ON, the LED is OFF. Improper setting of master and slave by remote control Poor connection, breakage of indoor-outdoor units connection wire Improper setting of master and slave by Remote Controller Poor connection of remote control signal wire (White). Intrusion of noise in remote control wire. For wire breaking at power ON, the LED is OFF Defective remote control or indoor control PCB (defective communication circuit)? Poor connection of wire between indoor-outdoor units during operation (disconnection, loose connection). Anomalous communication between indoor-outdoor units by noise, etc CPU Runaway on Outdoor control PCB Occurrence of defective outdoor control PCB on the way of power source (defective communication circuit)? Defective outdoor control PCB on the way of power source Blown fuse Defective indoor heat exchanger temperature thermistor (defective element, broken wire, short-circuit). Poor contact of temperature thermistor connector Defective indoor control PCB (Defective temperature thermistor input circuit)? Defective indoor return air temperature thermistor (defective element, broken wire, short-circuit). Poor contact of temperature thermistor connector Defective indoor control PCB (Defective temperature thermistor input circuit)? Heating over-load (Anomalously high indoor heat exchanger temperature Heating overload, faulty sensor, faulty indoor PCB Defective indoor control PCB (Defective temperature thermistor input circuit)? Defective drain pump (DM), broken drain pump wire, disconnected connector Anomalous float switch operation (malfunction Defective indoor control PCB (Defective float switch input circuit). Defective indoor control PCB (Defective DM drive output circuit)? Defective option parts (At optional anomalous input setting) E 10 E 11 E 14 E 16 E 19 E 20 E 21 E (2) No. of connected indoor units Address setting error Remote controller Fault Indoor fan motor Indoor power PCB Indoor control PCB Fan motor Indoor power PCB Panel switch detection Remote control temperature thermistor When multi-unit control by remote control is performed, the number of units is over 16 Address setting error of indoor units No master assigned to slaves, incorrect wiring, broken wire between master & slave Faulty Indoor fan motor, poor connection, faulty indoor PCB Defective indoor power PCB Improper operation mode setting Indoor fan motor rotation speed anomaly Defective indoor power PCB Defective panel switch operation (FDT only) Broken wire of remote control temperature thermistor Page 12 of 37

14 Inverter PAC Outdoor Remote control Error Code E 33 E 34 E 35 E 36 E 37 E 38 E 39 E 40 E 41 E 42 E 45 E 47 E 48 E 49 E 51 E 53 E 54 E 55 E 57 E 59 E 60 E 75 Red LED FDCVA FDC, FDCA DXC, DXCA PAC OUTDOOR UNIT - SELF-DIAGNOSIS INFORMATION Indoor PCB LEDs Outdoor unit LEDs INV LED Red LED Green LED (1) Red LED Green LED (1) Yellow LED HEN / HENR / HENAR VN / VS / VNX / VNXA / VSX / VSA VNX / VSA Location of trouble Description of trouble - Power supply Anomalous current on inverter primary side 2- or 6-1-or or 6- or 4-s Power supply Installation or operating condition Outdoor heat exchanger temperature thermistor Outdoor control PCB Installation or operating condition Discharge pipe temperature thermistor Outdoor control PCB Outdoor heat exchanger thermistor Outdoor control PCB Outdoor air temperature thermistor Outdoor control PCB Discharge pipe temperature thermistor Outdoor control PCB Installation or operating condition Outdoor control PCB Inverter PCB or radiator fin Outdoor control PCB compressor Installation or operating condition Outdoor control PCB Inverter PCB Control PCB, Power transistor Outdoor fan motor Outdoor control PCB Installation or operating condition Low pressure sensor Outdoor control PCB Inverter PCB Suction pipe temperature thermistor Outdoor control PCB Low Pressure Sensor Error Outdoor control PCB Under-dome temp thermistor Operation status Installation status Compressor inverter PCB Phase open circuit, faulty outdoor control PCB (3 Phase model) Higher outdoor heat exchanger temperature Defective outdoor heat exchanger temperature thermistor Defective outdoor control PCB (Defective temperature thermistor input circuit)? Higher discharge temperature Defective discharge pipe temperature thermistor Defective outdoor control PCB (Defective temperature thermistor input circuit)? Defective outdoor heat exchanger temperature thermistor, broken wire or poor connector connection Defective outdoor control PCB (Defective temperature thermistor input circuit)? Defective outdoor air temperature thermistor, broken wire or poor connector connection Defective outdoor control PCB (Defective temperature thermistor input circuit)? Defective discharge pipe temperature thermistor, broken wire or poor connector connection Defective outdoor control PCB (Defective temperature thermistor input circuit)? Rising high pressure (Operation of 63H1) Service valve closing operation Defective outdoor control PCB (Defective 63H input circuit)? Power transistor overheat Current cut (Anomalous compressor over-current) Service valve closing operation Anomalous outdoor control PCB communication Anomalous inverter PCB communication Anomalous inverter over voltage Anomalous outdoor fan motor Defective outdoor control PCB (Defective motor input circuit)? Low pressure error Service valve closing operation Anomalous low pressure, broken wire of low pressure sensor or poor connector connection Defective outdoor control PCB (Defective sensor input circuit)? Anomalous inverter PCB Defective suction pipe temperature thermistor, broken wire or poor connector connection Defective outdoor PCB (Defective thermistor input circuit)? Defective low pressure sensor Defective outdoor control PCB (Defective sensor input circuit)? Poor connection, broken wire, faulty thermistor, faulty PCB Shortage in refrigerant quantity Service valve closing operation Anomalous compressor start-up - Compressor Faulty compressor, faulty inverter circuit. - Central Controller communication error Poor connection, broken wire, faulty controller Page 13 of 37

15 PAC INDOOR UNIT WITH RAC OUTDOOR UNIT - SELF-DIAGNOSIS INFORMATION Inverter PAC Indoor/Outdoor FDT FDTC FDUM SRC 50,60VF/VG VF VF ZHX-S / ZIX-S / ZJX-S / ZMXA-S / ZSXA-W Remote control Indoor control PCB Outdoor Control PCB Error Code E 35 E 36 E 37 E 38 E 39 E 40 E 42 E 47 Red LED Red LED Green LED Red LED Flashing Location of trouble Installation, operation status Outdoor heat exchanger temp sensor Outdoor control PCB Installation, operation status Discharge pipe temperature sensor Outdoor control PCB Outdoor heat exchanger temperature sensor Outdoor control PCB Outdoor air temperature sensor Outdoor control PCB Discharge pipe temperature sensor Outdoor control PCB Installation, operation status Outdoor control PCB, compressor Installation, operation status Description of trouble Higher outdoor heat exchanger temperature Defective outdoor heat exchanger temperature sensor Defective outdoor control PCB (Defective temperature sensor input circuit)? Higher discharge temperature Defective discharge pipe temperature sensor Defective outdoor control PCB (Defective temperature sensor input circuit)? Defective outdoor heat exchanger temperature sensor, broken wire or poor connector connection Defective outdoor control PCB (Defective temperature sensor input circuit)? Defective outdoor air temperature sensor, broken wire or poor connector connection Defective outdoor control PCB (Defective temperature sensor input circuit)? Defective discharge pipe temperature sensor, broken wire or poor connector connection Defective outdoor control PCB (Defective temperature sensor input circuit)? Service valve (gas side) closing operation Current cut (Anomalous compressor over-current) Service valve closing operation 2- Outdoor control PCB Defective active filter E 48 Fan motor Outdoor control PCB Defective fan motor Defective outdoor control PCB E Power transistor, outdoor control PCB Power transistor error E Operation status Installation status Shortage in refrigerant quantity Service valve closing operation E Overload operation, overcharge, compressor locking Current safe stop E Compressor, outdoor control PCB Anomalous compressor start up E Compressor Anomalous compressor rotor lock Page 14 of 37

16 KX SELF-DIAGNOSIS INFORMATION Inverter KX Indoor control PCB LED Display Outdoor Control PCB FDCA----HKXE4_HXKRE4. FDC----KXEN6, KXE6, KXRE6, KXZE1, KXZPE1, KXZRE1 Error Code O/D 7 segment display Green LED Red LED Green LED Red LED Location of Trouble Presumable Causes E1 E2 E3 2 Communication error (indoorremote control) Duplicated indoor unit address Outdoor unit signal line error Poor or wrong connection, broken wire, intrusion of noise, faulty indoor PCB or remote control Number of connected indoor units exceeds the limitation, duplicated indoor unit address, indoor control PWB anomaly. Power not supplied to the O/D unit, mismatch of pairing between I/D and O/D units, indoor control PWB anomaly, Outdoor control PWB anomaly, Missing local wiring. E5 2 or 2 Communication error during operation Unit address number setting error, remote control wires broken, poor connection/disconnection of remote control wires, indoor control PWB anomaly E6 1 Indoor heat exchanger thermistor anomaly Anomalous connection of I/D heat exchanger temperature thermistor, I/D heat exchanger thermistor anomaly, I/D control PWB anomaly E7 1 Indoor return air temperature thermistor anomaly Anomalous connection of I/D return air temperature thermistor, I/D return air thermistor anomaly, I/D control PWB anomaly E9 1 Drainage trouble I/D control PWB anomaly, Mistake in setting of float switch, mistake in setting of optional equipment, mistake in drain piping, drain motor anomaly, disconnection/breakage of drain motor wires E10 Excessive number of indoor units (more than 17 units) by controlling one remote control Excessive number of I/D units, remote control anomaly E11 Address setting error between master and slave indoor units IU address has been set using the "Master IU address set" function of remote control E12 E16 1 Address setting error by mixed setting method Indoor fan motor anomaly (FDT, FDTC, FDTW, FDTS, FDU, FDUM, FDK, FDUT71, FDFW series) Automatic address setting and manual address setting method are mixed when setting address of indoor units I/D fan motor anomaly, foreign matter at rotational area of fan propeller, fan motor anomaly, dust on control PWB, blown fuse, external noise, surge E18 E19 E20 E21 E28 E Address setting error of master and slave indoor units Indoor unit operation check drain motor check mode anomaly Indoor fan motor speed anomaly (FDT, FDTC, FDTW, FDTS, FDU, FDUM, FDK, FDUT71, FDFW series) Defective panel switch operation (FDT) Remote control temperature thermistor anomaly (Thc) Duplicated outdoor unit address number Address setting error of the master indoor unit, no power to the master indoor unit, no connection of super link signal wires between master and slave indoor unit Mistake in SW7-1 setting due to forgetting to turn SW7-1 after indoor operation check I/D fan motor anomaly, foreign matter at rotational area of fan propeller, fan motor anomaly, dust on control PWB, blown fuse, external noise, surge Defective panel switch, disconnection of wiring, defective I/D control PWB Anomalous connection of remote control temperature thermistor, remote control temperature thermistor anomaly, remote control PWB anomaly Mistake in address setting of outdoor units, more than 129 I/D units connected, no setting of master/slave setting switch for combination use Page 15 of 37

17 E32 2 Open L3 phase on power supply at primary side Anomalous power supply at primary side, outdoor control PWB anomaly E36 E36-1 E Discharge pipe temperature error, Tho-D1 Discharge pipe temperature error, Tho-D2 Discharge pipe temperature anomaly, SV1,2 anomaly, breakage in coil, faulty main body, O/D control PWB anomaly, insufficient amount of refrigerant, insufficient airflow volume, short circuit of airflow E Liquid flooding anomaly KX6 product only E37 E37-1 E37-2 E37-3 E37-4 E37-5 E Outdoor heat exchanger temperature thermistor anomaly, Tho-R1 Outdoor heat exchanger temperature thermistor anomaly, Tho-R2 Outdoor heat exchanger temperature thermistor anomaly, Tho-R3 Outdoor heat exchanger temperature thermistor anomaly, Tho-R4 Outdoor sub cooling coil temperature thermistor 1 anomaly, Tho-SC Outdoor sub cooling coil temperature thermistor 2 anomaly, Tho-H Broken thermistor harness or the internal wire of sensing section, disconnection of thermistor harness connection, O/D control PWB anomaly E38 1 Outdoor air temperature thermistor anomaly, Tho-A E39 E39-1 E Discharge pipe temperature thermistor anomaly, Tho-D1 Discharge pipe temperature thermistor anomaly, Tho-D2 E40 1 High Pressure anomaly, 63H1-1, 2 activated Short circuit of airflow at condenser side of heat exchanger/disturbance of airflow/clogging filter/fan motor anomaly, disconnection of high pressure switch connector, breakage of high pressure switch harness, closed service valves, high pressure sensor anomaly, high pressure switch anomaly E41 E41-1 E Power transistor overheat, CM1 Power transistor overheat, CM2 Anomalous high temperature of power transistor is detected 5 s within 60 minutes. Power transistor anomaly, power transistor temperature thermistor anomaly, inverter PWB anomaly, outdoor fan motor anomaly, anomalous cooling fan motor for inverter E42 E42-1 E Current cut, CM1 Current cut, CM2 Compressor anomaly, refrigerant leak, power transistor module anomaly, anomalous power supply for INV PWB, O/D fan motor anomaly E43 E44 E43-1 E43-2 E44-1 E Excessive number of indoor units connected Excessive total capacity of connection Liquid flooding anomaly, CM1 Liquid flooding anomaly, CM2 Mistake in setting of I/D or O/D addresses, mistake in signal wire connection KXZ Product only. Mismatching of refrigerant piping and or signal wiring, overcharging of refrigerant, anomalous control of superheat, anomalous circuit of liquid refrigerant by-pass, anomalous refrigerant circuit of sub cooling coil, under dome temperature Tho-D1, D2 anomaly Page 16 of 37

18 E45 E45-1 E Communication error between inverter PWB and outdoor control PWB, INV 1 Communication error between inverter PWB and outdoor control PWB, INV 2 Signal wire anomaly, O/D control PWB anomaly, INV PWB anomaly, inrush current prevention resistor anomaly, defective 52C or 52X, defective diode module E46 Mixed address setting methods coexist in the same network Mistake in the address setting, mistake in the connection of signal wire E48 E49 E51 E53 E48-1 E48-2 E51-1 E51-2 E53-1 E Outdoor DC fan motor anomaly, FMO1 Outdoor DC fan motor anomaly, FMO2 Low pressure anomaly Power transistor overheat, CM1 Power transistor overheat, CM2 Suction pipe temperature thermistor anomaly, Tho-S, CM1 Suction pipe temperature thermistor anomaly, Tho-S, CM2 Broken or disconnected wire, faulty fan motor, defective inverter PWB, defective control PWB, defective power transistor, defective diode module, defective surge suppressor resistor Low pressure sensor (PSL) anomaly, service valves closed, EEV anomaly, insufficient refrigerant amount, clogging at EEV or strainer Anomalous high temperature of power transistor is detected 15 minutes continuously. Broken thermistor harness or the internal wire of sensing section, disconnection of thermistor harness connection, O/D control PWB anomaly Broken thermistor harness or the internal wire of sensing section, disconnection of thermistor harness connection, O/D control PWB anomaly E54 E54-1 E Low pressure anomaly (PSL) High pressure anomaly (PSH) Broken sensor harness, disconnection of sensor harness connection, sensor (PSH, PSL) anomaly, O/D control PWB anomaly, anomalous installation conditions, insufficient airflow volume, excessive or insufficient refrigerant amount E55 E56 E55-1 E55-2 E56-1 E Under dome temperature thermistor anomaly, Tho-C1 Under dome temperature thermistor anomaly, Tho-C2 Power transistor temperature anomaly, Tho-P1 Power transistor temperature anomaly, Tho-P2 Broken thermistor harness or the internal wire of sensing section, disconnection of thermistor harness connection, O/D control PWB anomaly E58 E58-1 E Anomalous compressor by loss of synchronism, CM1 Anomalous compressor by loss of synchronism, CM2 Insufficient elapsed after the power supplied before compressor start up (unit started without crankcase heater ON), compressor anomaly, inverter PWB anomaly, power transistor anomaly E59 E59-1 E Compressor start up failure, CM1 Compressor start up failure, CM2 Anomalous voltage of power supply, anomalous components for refrigerant circuit, inverter PWB anomaly, loose connection of connector or cable, compressor anomaly (motor or bearing) E60 E61 E63 E75 E60-1 E60-2 E61-1 E Rotor position detection error, CM1 Rotor position detection error, CM2 Communication error between the master unit and slave units, Slave unit 1 Communication error between the master unit and slave units, Slave unit 2 Emergency stop. When an ON signal is inputted to the CNT terminal of I/D control PWB Central control communications error KX4 & KX6 Product. If it fails to detect the rotor position of compressor, after changing over to the operation of compressor rotor position detection, the compressor stops. It restarts automatically after 3 minutes delay. If this anomaly occurs 4 s within 15 minutes after the initial detection, error is displayed Signal wire anomaly, O/D control PWB anomaly, INV PWB anomaly, inrush current prevention resistor anomaly Factor for emergency stop Poor connection, broken wire, faulty controller Page 17 of 37

19 Test Procedure 1PH & 3PH Diode Module WARNING Power the unit, waiting a minimum 3 minutes before removing any applicable wiring. Ensure to measure that the DC voltage has discharged sufficiently before carrying out the below testing. Page 18 of 37

20 Test Procedure 3 PH Transistor Module WARNING Power the unit, waiting a minimum 3 minutes before removing any applicable wiring. Ensure to measure that the DC voltage has discharged sufficiently before carrying out the below testing. Page 19 of 37

21 Test Procedure Electronic Expansion Valve WARNING Power the unit, waiting a minimum 3 minutes before removing any applicable wiring. Ensure to measure that DC voltage has discharged sufficiently before carrying out the below testing. Old New the Measure the resistance points as per the following table by Multer. Lead wires = 6 Lead wires = 5 If readings are within the nominated table values, it is normal. Inner Circuit of EEV Solenoid Coil Page 20 of 37

22 DC FAN MOTOR TESTING Expected Readings of Control PWB VDC Outputs to DCFM Multi Meter Test Points for VDC Expected Readings of DC Fan Motor Circuit Board Resistances Multi Meter Test Points for Ω Multer Red Probe Multer Black Probe PCB DC Volts Multer Black Probe Multer Red Probe DCFM PWB Resistance Value Vm Gnd # 300 ~ 350 Vdc Vm Gnd # > 1 MΩ Vcc Gnd # 15 Vdc Vcc Gnd # > 1 KΩ Vsp Gnd * 2 ~ 7 Vdc Vsp Gnd # > 100 KΩ Vfg Gnd * 2 ~ 7 Vdc Vfg Gnd * All Series Voltages are only present during operation. # ZM Series onwards - Voltages are only present during operation. # If Resistance Values are ok, confirm with DCFM Tester. Note: If no resistance value is evident, reverse multer probes and retest. Wiring of DC Fan Motor DC Fan Motor Type Type A Type B / C Type D Vm Motor Power Voltage Input Red Red Red Gnd Ground Black Blue Black Vcc Control Power Voltage Input White Brown White Vsp Speed Control Voltage Input Yellow Orange Yellow Vfg Revolution Pulse Output Blue White Blue IMPORTANT NOTE: The current version of the DCFM Tool, Part No: RMA006A012A (short/wide model) can run/test the Type C fan motor. The original version of the DCFM Tool, Part No: RMA006A012 (long/narrow model) cannot run/test the Type C fan motor. Page 21 of 37

23 DC FAN MOTOR TESTING Type A Fan Motor Type B / C Fan Motor Type B (RAC) Type C (PAC) Type D Fan Motor Page 22 of 37

24 KX - DC FAN MOTOR TESTING Page 23 of 37

25 THERMISTOR TEMPERATURE & RESISTANCE CHARACTERISTICS Wall Controller [ThC] Temperature ( C) Resistance value (kω) Temperature ( C) Resistance value (kω) Page 24 of 37

26 Hi-Wall Mounted Inverter Split Systems - SERVICE MODE SRK / DXK (R410A Models only) Term Service Mode Service Data Explanation The service mode is the mode where service data are displayed by lights when the operations described below are performed with the indoor controller These are the contents of error displays and protective stops which occurred I the past in the system. Error display contents and protective stop data from past anomalous operations are saved in the indoor unit controller's non-volatile memory. There are two types of data, self-diagnosis data and stop data. Self-Diagnosis Data (Error code) These are the data which display error display (self-diagnosis display) occurred in an indoor unit. Data are recorded for up to 5 previous occurrences. Data which is older than the 5th previous occurrence are erased. In addition, data on the temperature of each sensor are recorded when trouble occurs, so more detailed information can be checked. Stop Data (Stop code) These are the data which display the reason by which a stop occurred when the system performed protective stops, etc. in the past. If stop data alone are generated, the system restarts automatically. Data older than the 10th previous occasion are erased. (Important) In cases where transient stop data only are generated, the system may still be normal. However, if the same protective stop occurs frequently (3 or more s), it could lead to customer complaints Service mode display procedure Start Turn the A/C's power, and then wait one minute or longer. Turn the A/C \'s power back on while pressing the unit ON/OFF button. Did a buzzer located in the indoor unit sound? NO (*1) *1: If the buzzer does not sound no matter how many s you repeat the operation, the unit ON/OFF button may be faulty YES Within 1 minute after turning the A/C back on, signals will be sent from the remote control (*2) *2: Set the remote controls settings on "cooling operation", "fan speed MED" and "Set temperature: 21C." Count the number of s the RUN and TIMER lights (*3), and check the contents of the error, etc. from the table. Is other data displayed? YES NO Turn the A/C's power to terminate the service mode. Change the remote controls settings based on the instructions in the table (*4) Page 25 of 37

27 *3: To Count the number of es in the service mode, count the number of es after the light lights up for 1.5 sec initially (start signal). Do not count start signal. In the case of current cut (example: stop code 42 ) The RUN light (10 s digit) es 4 s and the TIMER light (1 s digit) es 2 s. 4 x x 10 = 42 > from the table, read the instructions for error code 42, current cut. Run light Timer light *4: When in the service mode, when the remote control settings (operation switching, fan speed switching, temperature setting) are set as shown in the following table and sent to the air conditioner unit, the unit switches to display of service data. SELF-DIAGNOSTIC DATA Wireless Remote Control Setting Operation Mode Fan Speed MED Contents of Output Data Displays the reason for stopping display in the past (error code) Cooling Heating HI AUTO LO MED HI AUTO Displays the room temp sensor reading at the the error code was displayed in the past Displays indoor heat exchanger sensor temp at the the error code was displayed in the past Displays the remote control information at the the error code was displayed in the past Displays the outdoor air temp sensor reading at the the error code was displayed in the past Displays the outdoor heat exchanger sensor temp at the the error code was displayed in the past Displays the discharge pipe sensor temp at the the error code was displayed in the past Wireless remote control Temperature setting Indicates the number of occasions previous to the present the error display data are from 21ºC Previous 22ºC 2nd previous 23ºC 3rd previous 24ºC 4th previous 25ºC 5th previous Only for models that have Indoor Heat Exchanger 2 Wireless Remote Control Temperature setting Indicates the number of occasions previous to the present the error display data are from 26ºC Previous 27ºC 2nd previous 28ºC 3rd previous 29ºC 4th previous 30ºC 5th previous Page 26 of 37

28 (Example) Wireless Remote Control Setting Operation Switching Fan Speed Switching Temp Setting Displayed Data 21ºC Displays the reason for the stop the previous an error code was displayed 22ºC Displays the reason for the stop 2 s previous an error was displayed Cooling Medium 23ºC Displays the reason for the stop 3 s previous an error was displayed 24ºC Displays the reason for the stop 4 s previous an error was displayed 25ºC Displays the reason for the stop 5 s previous an error was displayed (ii) Stop data Operation Switching Remote Control Setting Fan Speed Switching Temp Setting Displayed Data 21ºC Displays the reason for the (stop code) the previous when the A/C was stopped by protective stop control 22ºC Displays the reason for the (stop code) 2 s previous when the A/C was stopped by protective stop control 23ºC Displays the reason for the (stop code) 3 s previous when the A/C was stopped by protective stop control 24ºC Displays the reason for the (stop code) 4 s previous when the A/C was stopped by protective stop control Cooling LO 25ºC Displays the reason for the (stop code) 5 s previous when the A/C was stopped by protective stop control 26ºC Displays the reason for the (stop code) 6 s previous when the A/C was stopped by protective stop control 27ºC Displays the reason for the (stop code) 7 s previous when the A/C was stopped by protective stop control 28ºC Displays the reason for the (stop code) 8 s previous when the A/C was stopped by protective stop control 29ºC Displays the reason for the (stop code) 9 s previous when the A/C was stopped by protective stop control 30ºC Displays the reason for the (stop code) 10 s previous when the A/C was stopped by protective stop control (d) Operation mode, Fan speed mode information tables (i) Operation mode (ii) Fan Speed mode Display pattern when in Service Mode RUN light (10 s digit) Operation switching when there is an abnormal stop Display pattern when in Service Mode TIMER light (1 s digit) Fan Speed mode when there is an abnormal stop -- AUTO 1 DRY 2 COOL 3 FAN 4 HEAT -- AUTO 2 HI 3 MED 4 LO 5 ULO 6 HI POWER 7 ECONO Page 27 of 37

29 * If no data is recorded (error code is normal), the information display in the operation mode and fan speed mode becomes as follows; Mode Operation mode Fan speed mode Display when error code is normal Auto Auto (e) Temperature information (i) Room temperature sensor, indoor heat exchanger sensor, outdoor air temperature sensor, outdoor heat exchanger sensor temperature Page 28 of 37

30 *If no data are recorded (error code is normal), the information display in the remote control becomes as follows. Sensor name Room temperature sensor Indoor heat exchanger sensor Outdoor air temperature sensor Outdoor heat exchanger sensor Discharge pipe sensor Sensor value displayed when the error code is normal -64ºC -64ºC -64ºC -64ºC -64ºC EXAMPLE - Outdoor air sensor temperature 42 ºC If the temperature is 0, the buzzer does not sound. Run light x4, Timer light x 2. RUN LIGHT TIMER LIGHT No Buzzer, Run light x 4, Timer light x 2 *If no data are recorded (error code is normal), the information display in the remote control becomes as follows. Discharge pipe sensor Sensor name Sensor value displayed when the error code is normal -64ºC Page 29 of 37

31 Customer Date of Investigation Content of Complaint Temp setting 21 Remote Control Settings Operation switching Cooling Heating Fan speed switching MED HI AUTO LO MED HI AUTO SERVICE DATA RECORD FORM Error code on previous occasion Model number Serial number Content of displayed data Room temperature sensor on previous occasion Indoor heat exchanger sensor 1 on previous occasion Remote control information on previous occasion Outdoor air temperature sensor on previous occasion Outdoor heat exchanger sensor on previous occasion Discharge pipe sensor on previous occasion 26 Cooling AUTO Indoor heat exchanger sensor 2 on previous occasion 22 Cooling Heating MED HI AUTO LO MED HI AUTO Error code on 2nd previous occasion Room temperature sensor on 2nd previous occasion Indoor heat exchanger sensor 1 on 2nd previous occasion Remote control information on 2nd previous occasion Outdoor air temperature sensor on 2nd previous occasion Outdoor heat exchanger sensor on 2nd previous occasion Discharge pipe sensor on 2nd previous occasion 27 Cooling AUTO Indoor heat exchanger sensor 2 on 2nd previous occasion 23 Cooling Heating MED HI AUTO LO MED HI AUTO Error code on 3rd previous occasion Room temperature sensor on 3rd previous occasion Indoor heat exchanger sensor 1 on 3rd previous occasion Remote control information on 3rd previous occasion Outdoor air temperature sensor on 3rd previous occasion Outdoor heat exchanger sensor on 3rd previous occasion Discharge pipe sensor on 3rd previous occasion 28 Cooling AUTO Indoor heat exchanger sensor 2 on 3rd previous occasion 24 Cooling Heating MED HI AUTO LO MED HI AUTO Error code on 4th previous occasion Room temperature sensor on 4th previous occasion Indoor heat exchanger sensor 1 on 4th previous occasion Remote control information on 4th previous occasion Outdoor air temperature sensor on 4th previous occasion Outdoor heat exchanger sensor on 4th previous occasion Discharge pipe sensor on 4th previous occasion 29 Cooling AUTO Indoor heat exchanger sensor 2 on 4th previous occasion 25 Cooling Heating MED HI AUTO LO MED HI AUTO Error code on 5th previous occasion Room temperature sensor on 5th previous occasion Indoor heat exchanger sensor 1 on 5th previous occasion Remote control information on 5th previous occasion Outdoor air temperature sensor on 5th previous occasion Outdoor heat exchanger sensor on 5th previous occasion Discharge pipe sensor on 5th previous occasion 30 Cooling AUTO Indoor heat exchanger sensor 2 on 5th previous occasion 21 Stop code on previous occasion 22 Stop code on 2nd previous occasion 23 Stop code on 3rd previous occasion 24 Stop code on 4th previous occasion 25 Stop code on 5th previous occasion Cooling LO 26 Stop code on 6th previous occasion 27 Stop code on 7th previous occasion 28 Stop code on 8th previous occasion 29 Stop code on 9th previous occasion 30 Stop code on 10th previous occasion Judgement Remarks Buzzer Yes/No Display results RUN light (Times) TIMER light (Times) Display content Note (1) In the case of indoor heat exchanger sensor 2, match from 26 to 30 the temperature setting of wireless remote control. (Refer to page 26) Page 30 of 37

32 ERROR CODE & STOP CODE TABLE (PREVIOUS) Models SRK ZD, ZF, ZG, ZDX-S, ZFX-S, ZGX-S ZEA-S, ZE-S1 YJ-S, YL-S DXK Z3-S Flashes in Service Mode Run Timer Stop or Error Code Major Category Error Content Minor Category Cause Occurrence Conditions 1 11 Comp software start Comp Lock, Wiring short, Comp output is open phase, Outdoor PCB faulty Compressor start fails 42 s in succession and the final failure is current cut Lower than 20 rps Service valve closed, Compressor output open phase, EEV faulty After the compressor starts, it stops due to current cut at less than 20 rps rps or higher Current Cut Service valve closed, Compressor output open phase, EEV faulty When operation is stopped by current cut at 20 rps or higher Excessive voltage (DC 350V) Outdoor PCB faulty, Power supply abnormal When the DC voltage (DC 280V) exceeds 350V Short circuit in power transistor (high side) Current cut circuit breakdown Outdoor PCB faulty, power transistor damaged Outdoor PCB faulty, power transistor damaged When it is judged that the power transistor was damaged at the the compressor started 1 21 PWM calculation results are abnormal Compressor wires are disconnected, Power transistor is damaged When PWM calculation results are 0% continued for 3 minutes or longer Outdoor unit error Input is 2A or lower (PWM 90% or higher) Abnormal stop 3 s in 20 minutes Compressor wires are disconnected, outdoor PCB is faulty Service valve is closed. Compressor output is open phase. Electronic expansion valve is faulty. Low on gas. When PWM calculation results of 90% and an input current lower than the set valve continue for 3 minutes or longer When an abnormal stop occurs 3 s with automatic recovery within 20 minutes after the outdoor unit's power supply was turned on Voltage drop Power supply is faulty. Outdoor PCB is faulty When the power supply voltage drops during operation Outdoor fan motor error Outdoor unit's fan motor is abnormal (DC motor only) Outdoor fan motor faulty. Poor connection. Faulty outdoor PCB When a fan speed of 75rpm or lower continues for 30 seconds or longer Cooling current safe 1 When there is a current safe stop in current safe mode 1 mode during cooling operation Current Safe Heating current safe 1 Cooling current safe 2 Overcharge. Compressor lock When there is a current safe stop in current safe mode 1 mode during heating operation When there is a current safe stop in current safe mode 2 mode during cooling operation 4 34 Heating current safe 2 When there is a current safe stop in current safe mode 2 mode during heating operation Page 31 of 37

33 ERROR CODE & STOP CODE TABLE (PREVIOUS) Models SRK ZD-S, ZF-S, ZG-S ZDX-S, ZFX-S, ZGX-S ZE-S1, ZEA-S YL-S, YJ-S DXK Z3-S Flashes in Service Mode Run Timer Stop or Error code Major Category Error Content Minor Category Cause Occurrence Conditions 5 35 Cooling current safe 3 When there is a current safe stop in current safe mode 3 mode during cooling operation Current Safe Heating current safe 3 Overcharge. Compressor lock When there is a current safe stop in current safe mode 3 mode during heating operation 7 37 Heating current safe 3 + 3A When there is a current safe stop in current safe mode 3 + 3A mode during heating operation 1 41 Cooling overload 1 (outdoor temp 36~40*C) When there is a current safe stop in overload 1 mode during cooling operation 2 42 Heating overload 1 (outdoor temp 5~12*C) When there is a current safe stop in overload 1 mode during heating operation Current Safe Cooling overload 2 (outdoor temp 40~45*C) Heating overload 2 (outdoor temp 12~17*C) Overcharge. Compressor lock. Overload operation When there is a current safe stop in overload 2 mode during cooling operation When there is a current safe stop in overload 2 mode during heating operation 5 45 Cooling overload 3 (outdoor temp 45*C~) When there is a current safe stop in overload 3 mode during cooling operation 6 46 Heating overload 3 (outdoor temp 17*C~) When there is a current safe stop in overload 3 mode during heating operation 5 OFF Comp overheat Power transistor overheat 110*C Service valve closed. Low on gas. Discharge pipe sensor is faulty 110*C Cooling problem When the discharge pipe's sensor exceeds the set value When power transistor temp exceeds setting value (compressor stops). OFF 60 Signal not received for 1 min & 55 sec Power supply faulty. Incorrect wiring. Indoor/ outdoor PCB faulty When 1 min 55sec passes without communication from either the outdoor or indoor being detected correctly Serial signal error Faulty interconnect wiring Connections between indoor and outdoor are faulty. Faulty indoor/ outdoor PCB When 10 sec passes after the power is on without communication signals from the indoor/ outdoor unit being detected correctly 2 62 Serial transmission error Indoor/ outdoor PCB faulty. Noise causing faulty operation When 1 min 50 sec passes without communication signals from either indoor or outdoor unit being detected correctly Page 32 of 37

34 ERROR CODE & STOP CODE TABLE (PREVIOUS) Models SRK ZD-S, ZF-S, ZG-S ZDX-S, ZFX-S, ZGX-S YJ-S, YL-S ZE-S1, ZEA-S DXK Z3-S Flashes in Service Mode Run Timer Stop or Error Code 1 71 Major Category Error content Minor Category Less than 16 rps rps or higher Cause Compressor faulty. Compressor output is open phase. EEV is faulty. Overload operation. Outdoor unit PCB is faulty. Occurrence Conditions After the compressor starts, when it stops at less than 16 rps due to rotor lock When the comp stops at 16rps or higher due to rotor lock 3 73 Phase switching defects (U phase) Rotor lock Phase switching defects (V phase) Phase switching defects (W phase or can t distinguish) Compressor is faulty. Compressor wiring is faulty. Outdoor unit PCB is faulty When compressor start fails 42 s in succession and the reason for the final failure is rotor lock Comp software start (within 4 sec after phase switching) OFF 80 Indoor unit fan motor is abnormal Faulty connection. Faulty fan motor. Indoor PCB faulty When indoor fan motor is detected to be running at 300rpm or lower Discharge pipe sensor is abnormal (anomalous stop) Senor wire disconnected faulty connection When a disconnected signal (temp below 7*C) is sent for 15 sec or longer as the sensor data after the comp speed is 0rps or higher cont. for 9 min Indoor heat exchanger sensor is abnormal (anomalous stop) Sensor wire disconnected faulty connection When a temperature of -20*C or lower is sensed cont. for 40 min during heating operation. (Compressor stops) Protective control operation Outdoor heat exchanger sensor is abnormal (anomalous stop) Anti -condensation control Sensor wire disconnected faulty connection High humidity. Faulty humidity sensor When a temperature or - 50*C or lower is sensed cont. for 40 min during heating operation. Compressor stops Anti-condensation prevention control is operating 5 85 Anti-frost control Indoor fan speed drops. Indoor heat exchanger sensor short circuit When the anti-frost control operates and the compressor stops during cooling operation High pressure control Heating overload. Indoor fan speed drops. Indoor heat exchanger sensor short circuit When high pressure control operates during heating operation and the comp stops Comp overheating protection control Short of gas. Discharge pipe sensor is faulty. Closed service valve. When compressor overheating protective control operates and the compressor stops Refrigeration cycle system protective control Service valve closed. Short of gas. When refrigerant cycle system protective control operates. Page 33 of 37

35 Models Flashes in Service Mode Run Timer OFF ERROR CODE & STOP CODE TABLE (CURRENT) SRK ZJ-S, ZJ-S1, ZMA-S, ZRA-W, ZSA-W ZHX-S, ZIX-S, ZJX-S, ZMXA-S, ZSXA-W ZK-S, ZL-S YRA-W, YSA-W SRR DXK Stop or Error Code ZM-S ZJ-S, Z4-S, ZL-S,ZMA-S, ZRA-W, ZSA-W Error Content Cause Occurrence Conditions OFF 0 Normal Error of wired remote control wiring Cannot receive signals for 35 sec (if communications have recovered Broken wired remote control wire, defective indoor PCB Power supply is faulty. Power supply cables and signal lines are improperly wired. Indoor/ outdoor PCBs are faulty. The wired remote control wire Y is open. The wired remote control wires X and Y are reversely connected. Noise is penetrating the wired remote control lines. The wired remote control or indoor PCB is faulty. When 35 sec passes without communications signals from either the outdoor or indoor unit being detected correctly 5 35 Cooling high pressure control Cooling overload operation. Outdoor fan speed drops. Outdoor heat exchanger sensor is short circuit. When the outdoor heat exchanger sensor's value exceeds the set value Compressor over heat (115*C) Low on gas. Discharge pipe sensor is faulty. Service valve is closed When the discharge pipes sensor value exceeds the set value Outdoor heat exchanger sensor is abnormal. Outdoor heat exchanger faulty. Poor connections When a temp of -55*C or lower is sensed cont. for 20 sec while the power is on or after the outdoor units speed has continued at 0rps or higher for 2 min. (The comp stops) 8 38 Outdoor air temp sensor is abnormal Outdoor air temp sensor wire is faulty. Poor connection When a temp of -55*C or lower is sensed cont. for 20 sec while the power is on or after the outdoor units speed has continued at 0rps or higher for 2 min. (The comp stops) 9 39 Discharge pipe sensor is abnormal (anomalous stop) Discharge pipe sensor wire is faulty. Poor connection When a temp of -25*C or lower is sensed cont. for 20 sec after the outdoor units speed has continued at 0rps or higher for 10 min. (the comp stops) 4 OFF Service valve (gas side) closed 42 Current cut Service valve closed, or faulty outdoor PCB Service valve closed. Compressor locked/faulty. Outdoor PCB faulty. EEV faulty. 47 Active filter voltage error Defective active filter. 48 Outdoor fan motor abnormal Poor connection. Faulty fan motor. Faulty PCB. If the inverter output current exceeds set value within 80 seconds, after compressor ON in heating Compressor start fails 42 s in succession and final reason for failure is current cut. When the wrong voltage connected for the power supply. When the outdoor control PCB is faulty. When a fan speed of 75rpm or lower continues for 30 sec or longer. Page 34 of 37

36 ERROR CODE & STOP CODE TABLE (CURRENT) continued SRK ZJ-S, ZJ-S1, ZMA-S, ZRA-W, ZSA-W ZHX-S, ZIX-S, ZJX-S, ZMXA-S, ZSXA-W ZK-S, ZL-S YRA-W, YSA-W Models Flashes in Service Mode Run Timer SRR DXK Stop or Error Code ZM-S ZJ-S, Z4-S, ZL-S, ZMA-S, ZRA-W, ZSA-W Error Content Cause Occurrence Conditions 1 51 Short circuit in the power transistor (high side) Current cut circuit breakdown Outdoor PCB is faulty, power transistor damaged When it is judged that the power transistor was damaged at the the compressor started Refrigeration cycle system protective control Service valve closed. Short of gas. When the refrigeration cycle protective control operates Current safe Refrigerant is overcharged. Compressor locked. Overload operation. When there is a current safe during operation Compressor wiring is disconnected. Voltage drop. Low speed protective control Compressor wiring is disconnected. Power transistor is damaged. Power supply construction is defective. Outdoor PCB is faulty. When the current is 1A or less at the the compressor started. When the power supply voltage drops during operation. When the outdoor unit's speed is lower than 26rps for 60 min. OFF 60 Rotor lock Overload operation. Faulty compressor. Faulty EEV. Faulty outdoor PCB. After the compressor starts, when the compressor stops due to rotor lock Connection lines between the indoor & outdoor are faulty. Connection line is faulty. Indoor or outdoor PCBs are faulty. When 10 sec passes after the power on without communications signals from the indoor or outdoor being detected correctly 2 62 Serial signal error Indoor or outdoor unit PCBs are faulty. Noise causing faulty operation. When 7 min 35 sec passes without communication signals from indoor or outdoor unit being detected correctly. OFF 80 Indoor fan motor is faulty Indoor fan motor is faulty. Poor connection. Faulty indoor PCB. When the indoor fan motor is detected to be running at 300 rpm or lower 2 82 Indoor heat exchanger sensor abnormal Indoor heat exchanger sensor wire faulty. Poor connection. When a temp of -28*C or lower is sensed cont. for 40 min during heating Anti-condensation control High humidity condition. Faulty humidity sensor. Anti-condensation prevention control is operating Anti-frost control Indoor fan speed drops. Indoor heat exchanger sensor is faulty When the anti-frost control operates and the compressor stops during cooling operation Heating high pressure control Heating overload operation. Indoor unit fan speed drops. Indoor heat exchanger sensor is short circuit. When high pressure control operates during heating operation and the compressor stops Drain trouble Defective drain pump (DM), broken drain pump wire, anomalous float switch operation, defective indoor PCB If the float switch OPEN is detected for 3 seconds continuously or if the float switch connector or wire is disconnected Page 35 of 37

37 RC-E5 OPERATION DATA Page 36 of 37