TECHNICAL & SERVICE MANUAL. Ceiling Concealed

Transcription

1 STAND BY DEFROST CHECK CLOCK ON OFF NOT AVAILABLE FILTER CHECK MODE TEST RUN FUNCTION SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS TECHNICAL & SERVICE MANUAL Series SEZ Ceiling Concealed R40A.OC0 REVISED EDITION-A Indoor unit [Model names] SEZ-AAR SEZ-A8AR SEZ-A4AR [Service Ref.] SEZ-AAR.TH SEZ-A8AR.TH SEZ-A4AR.TH Revision :. SPECIFICATIONS has been modified. te : This manual does not cover the following outdoor units. When servicing them, please refer to the service manual.oc04 REVISED EDITION-A and this manual in a set. Please void OC0. CONTENTS INDOOR UNIT Model name indication. PART NAMES AND FUNCTIONS. SPECIFICATIONS 5. OUTLINES AND DIMENSIONS 8 4. WIRING DIAGRAM 9 5. REFRIGERANT SYSTEM DIAGRAM 0 6. TROUBLESHOOTING 7. DISASSEMBLY PROCEDURE 8 8. PARTS LIST 9. OPTIONAL PARTS CENTRALLY CONTROLLED C ERROR CODE TEMP. Hr. C ON/OFF WIRED REMOTE CONTROLLER

2 Revision:. SPECIFICATIONS has been modified on page 5 and 6. Page Revise point Service Ref. Incorrect Correct 5 Electrical date SEZ-AAR.TH Power input Rated frequency SEZ-A8AR.TH SEZ-A4AR.TH

3 PART NAMES AND FUNCTIONS Indoor Unit SEZ-AAR.TH SEZ-A8AR.TH SEZ-A4AR.TH Air outlet Air outlet duct flange Air inlet (Selecting the either back side or bottom side) Wired remote controller On the controls are set, the same operation mode can be repeated by simply pressing the ON/OFF button. Operation buttons TEMP. ADJUSTMENT button This sets the room temperature. The temperature setting can be performed in : units Setting range Cooling 9: to 0: Heating 7: to 8: TIME SETTING button This sets the current time, start time and stop time. FAN SPEED button This sets the ventilation fan speed. ON/OFF button TIMER button This switches between continuous operation and the timer operation. OPERATION SWITCH button Press this button to switch the cooling, electronic dry (dehumidify), automatic and heating modes. STAND BY DEFROST PAR-0MAA CHECK CENTRALLY CONTROLLED ON OFF C TEMP. TIMER SET CLOCK ERROR CODE Hr. C FILTER CHECK MODE TEST RUN NOT AVAILABLE FUNCTION ON/OFF FILTER CHECK TEST This switches between the operation and stop modes each time it is pressed. The lamp on this button lights during operation. AIR DIRECTION button This adjusts the vertical angle of the ventilation. (t available for this model.) FILTER button This resets the filter service indication display LOUVER button This switch the horizontal fan motion ON and OFF. (t available for this model.) VENTILATION button This sets the ventilation fan speed. (t available for this model.) CHECK-TEST RUN button Only press this button to perform an inspection check or test operation. Do not use it for normal operation.

4 Display CENTRALLY CONTROLLED display This indicates when the unit is controlled by optional features such as central control type remote controller. TIMER display This indicates when the continuous operation and time operation modes are set. It also display the time for the timer operation at the same time as when it is set. CLOCK display The current time, start time and stop time can be displayed in ten second intervals by pressing the time switch button. The start time or stop time is always displayed during the timer operation. AIR DIRECTION display This displays the air direction. (t available for this model.) In this display example on the bottom left, a condition where all display lamps light is shown for explanation purposes although this differs from actual operation. AIR SPEED display The selected fan speed is displayed. ROOM TEMPERATURE display OPERATION MODE display This indicates the operation mode. STAND BY DEFROST CHECK CENTRALLY CONTROLLED ON OFF C TEMP. CLOCK ERROR CODE Hr. C FILTER CHECK MODE TEST RUN NOT AVAILABLE FUNCTION ON/OFF The temperature of the suction air is displayed during operation. The display range is 8 C to 9 C. The display flashes 8 C when the actual temperature is less than 8 C and flashes 9 C when the actual temperature is greater than 9 C. STANDBY display FILTER CHECK TEST Operation lamp The [STANDBY] symbol is only displayed from the time the heating operation starts unit the heated air begins to blow. PAR-0MAA TIMER SET This lamp lights during operation, goes off when the unit stops and flashes when a malfunction occurs. DEFROST display This indicates when the defrost operation is performed. CHECK MODE TEST RUN display This display lights in the check mode or when a test operation is performed. FILTER display CHECK display This indicates when a malfunction has occurred in the unit which should be checked. SET TEMPERATURE display This displays the selected setting temperature. POWER display This lamp lights when electricity is supplied to the unit. This lamp lights when the filter need to be cleaned. Caution Only the Power display lights when the unit is stopped and power supplied to the unit. NOT AVAILABLE is displayed when the Air speed button are pressed.this indicates that this room unit is not equipped with the fan direction adjustment function and the louver function. When power is turned ON for the first time, it is normal that H0 is displayed on the room temperature indication (For max. minutes). Please wait until this H0 indication disappear then start the operation. 4

5 SPECIFICATIONS Indoor model SEZ-AAR.TH SEZ-A8AR.TH Capacity Electrical data Fan motor Special remarks Function Power supply Air flow (High/Low) Power outlet Running current Power input Rated frequency Auxiliary heater Power factor Fan motor current Model Winding resistance (at0:) Dimensions WoHoD Weight Air direction Sound level (High/Low) Fan speed (High/Low) Fan speed regulator Thermistor RT (at 5:) Thermistor RT (at 5:) Thermistor RT (at 5:) Remote controller model K /h A A W A(kW) % A " mm kg db(a) rpm k" k" k" Cooling NOTE : Test conditions are based on ISO 55 Cooling : Indoor D.B. 7: W.B. 9: Outdoor D.B. 5: W.B. 4: Heating : Indoor D.B. 0: W.B. 5: Outdoor D.B. 7: W.B. 6: Refrigerant piping length (one way): 5m Measured under rated operating frequency. 94 Single phase 0V, 50Hz 780/ PK6V9-EF Heating 95 WHT-BLK : 5.4 BLK-BLU : 9.9 BLU-YLW : 6.5 YLW-BRN :. BRN-RED : o70o /0 770/ PAR-0MAA Cooling 97 Single phase 0V, 50Hz 00/ PK6V-EF Heating 98 WHT-BLK : 6.9 BLK-BLU : 50. BLU-YLW : 8.7 YLW-BRN : 8.0 BRN-RED : 9. 00o70o / 840/ PAR-0MAA Specifications and rating conditions of main electric parts INDOOR UNIT Model Item Indoor fan capacitor (C) Fuse (FUSE) Varistor (ZNR) Terminal block (TB) Contactor (5C) Indoor fan motor thermal fuse SEZ-AAR.TH SEZ-A8AR.TH SEZ-A4AR.TH SEZ-A/8AR.TH : V SEZ-A4AR.TH : V 50V.5A ERZV0D47 POWER SUPPLY : P TO OUTDOOR UNIT : 4P G4A-A-E-PS V DC 45:i: 5

6 Indoor model SEZ-A4AR.TH Capacity Electrical data Fan motor Special remarks Function Power supply Air flow (High/Low) Power outlet Running current Power input Rated frequency Auxiliary heater Power factor Fan motor current Model Winding resistance (at0:) Dimensions WoHoD Weight Air direction Sound level(high/low) Fan speed(high/low) Fan speed regulator Thermistor RT (at 5:) Thermistor RT (at 5:) Thermistor RT (at 5:) Remote controller model K /h A A W A(kW) % A " mm kg db(a) rpm k" k" k" Cooling NOTE : Test conditions are based on ISO 55 Cooling : Indoor D.B. 7: W.B. 9: Outdoor D.B. 5: W.B. 4: Heating : Indoor D.B. 0: W.B. 5: Outdoor D.B. 7: W.B. 6: Refrigerant piping length (one way): 5m Measured under rated operating frequency. 98 Single phase 0V, 50Hz 00/ PK6V50-EF Heating 98 WHT-BLK : 0. BLK-BLU : 56. BLU-YLW : 4.7 YLW-BRN : 6.7 BRN-RED : 8. 00o70o / 890/ PAR-0MAA 6

7 NOISE CRITERION CURVES SEZ-AAR.TH NOTCH Hi Lo SPL(dB) 5 0 <50Hz> LINE SEZ-A8AR.TH NOTCH Hi Lo SPL(dB) 9 <50Hz> LINE OCTAVE BAND SOUND PRESSURE LEVEL, db (0 db = µbar) APPROXIMATE TERESHOLD OF HEARING FOR CONTINUOUS NOISE NC-70 NC-60 NC-50 NC-40 NC-0 NC-0 OCTAVE BAND SOUND PRESSURE LEVEL, db (0 db = µbar) APPROXIMATE TERESHOLD OF HEARING FOR CONTINUOUS NOISE NC-70 NC-60 NC-50 NC-40 NC-0 NC-0 BAND CENTER FREQUENCIES, Hz BAND CENTER FREQUENCIES, Hz SEZ-A4AR.TH NOTCH Hi Lo SPL(dB) 4 <50Hz> LINE 90 OCTAVE BAND SOUND PRESSURE LEVEL, db (0 db = µbar) APPROXIMATE TERESHOLD OF HEARING FOR CONTINUOUS NOISE NC-70 NC-60 NC-50 NC-40 NC-0 NC-0 External static pressure 0Pa.5m MICROPHONE UNIT BAND CENTER FREQUENCIES, Hz NOTE: The sound level is measured in an anechoic room where echoes are few, when compressor stops. The sound may be bigger than displayed level under actual installation condition by surrounding echoes. The sound level can be higher by about db than the displayed level during cooling and heating operation. 7

8 OUTLINES AND DIMENSIONS SEZ-AAR.TH SEZ-A8AR.TH SEZ-A4AR.TH Unit : mm Air inlet (rear side) dimensions 4 90 (Inlet size) In case of bottom side suction, mount the PLATE (A) on the rear side. After installation, remove the transportation support PLATE (B). Air inlet (bottom side) dimensions PLATE (A) (Inlet size) o00= [.9 holes Air inlet (rear side) w Select the either back side or bottom side PLATE (B) o Electrical parts box (Inlet size) 7o00= [.9 holes 5 (Inlet size) Suspension bolt pitch 8 60 (0) 50 Suspension bolt M0 or /8 (procure locally) o00= o-[.9 holes Air outlet 070 Suspension bolt pitch (070) (Suspension bolt pitch) 00 Air outlet duct flange Air inlet (bottom side) Access door w Select the either back side or bottom side or more 0 70 Electrical parts box Access door Service space (It is necessary to maintain a working service area from the ceiling.) o-[.9 holes Air outlet duct flange (0) Refrigerent pipe (gas) 50 5 Refrigerent pipe (liquid) Wiring entry Terminal block Electrical parts box Drain plug R male Models SEZ-AAR SEZ-A8AR SEZ-A4AR Refrigerent pipe (liquid) [6.5mm flared connection /4F [6.5mm flared connection /4F [6.5mm flared connection /4F Refrigerent pipe (gas) [9.5mm flared connection /8F [.7mm flared connection /F [5.88mm flared connection 5/8F 8

9 4 WIRING DIAGRAM SEZ-AAR.TH SEZ-A8AR.TH SEZ-A4AR.TH CIRCUIT BREAKER TB L w WHT TO OUTDOOR UNIT CONNECTING FOR A8/4 (: SYSTEM) OR MULTI SYSTEM V DC N N N w BLU GRN/YLW POWER SUPPLY ~/N 0-40V 0V 50Hz 60Hz TB VDC w RED FOR A (: SYSTEM) 0-40V~ w WHT TO OUTDOOR UNIT CONNECTING w BLU GRN/YLW MF WHT BLK BLU YLW BRN RED ORN BLU 5 CND(POWER) RED FAN (FAN) WHT 7 5 FAN(FAN) 5 WHT C X X4 X5 X X4 X5 5C 4 w TRANS DC.V TRANSMISSION WIRE DCV R.B FUSE ZNR TB BLU BLU CN9 ( PHASE) BLK CN (LIQUID) WHT CN0 (INTAKE) RED CN (REMOCON) BLU I.B RT RT RT [LEGEND] SYMBOL I.B C FUSE 5C NAME INDOOR CONTROLLER BOARD X,X4,X5 RELAY(FAN MOTOR) ZNR FAN MOTOR CAPACITOR FUSE(.5A) VARISTOR COMPRESSOR CONTACTOR SYMBOL MF RT RT RT TB R.B NAME FAN MOTOR ROOM TEMPERATURE THERMISTOR PIPE TEMPERATURE THERMISTOR / LIQUID CONDENSER / EVAPORATOR TEMPERATURE THERMISTOR TERMINAL BLOCK REMOTE CONTROLLER BOARD CN TB The V DC is NOT always against the ground. Terminal has V DC against terminal N. However, between and, these terminals are NOT electrically insulated by the transformer or other device. NOTES:.Since the indoor fan motor(mf) is connected with 50Hz power,if 60Hz power is used, change the wiring connection showing fig: * fig: * 50 YELLOW Indoor Fan Motor(MF) for 60Hz BLUE.About the outdoor side electric wiring refer to the outdoor unit electlic wiring diagram for servicing..use copper conductors only. (For field wiring) 4.Symbols below indicate. : Terminal block : Connector How to remove the terminals shown at " w " mark. 60 BLUE " w " shows the terminals with a lock mechanism, so they cannot be removed when you pull the lead wire. Be sure to pull the wire by pushing the locking lever (projected part) of the terminal with a finger. sleeve Slide the sleeve. Pull the wire while pushing the locking lever. locking lever 9

10 5 REFRIGERANT SYSTEM DIAGRAM SEZ-AAR.TH SEZ-A8AR.TH SEZ-A4AR.TH Heat exchanger Condenser/evaporator temperature thermistor (RT) Strainer #50 Refrigerant GAS pipe connection (Flare) Refrigerant flow in cooling Refrigerant flow in heating Room temperature thermistor (RT) Pipe temperature thermistor/liquid (RT) Distributor with strainer #50 Strainer #50 Refrigerant LIQUID pipe connection (Flare) 0

11 6 TROUBLESHOOTING 6-. Cautions on troubleshooting () Before troubleshooting, check the followings: Check the power supply voltage. Check the indoor/outdoor connecting wire for mis-wiring. () Take care the followings during servicing. Before servicing the air conditioner, be sure to first turn off the remote controller to stop the main unit, and then turn off the breaker. When removing the indoor controller board, hold the edge of the board with care NOT to apply stress on the components. When connecting or disconnecting the connectors, hold the housing of the connector. DO NOT pull the lead wires. 6-. Self-check function Wired remote controller () Turn on the power. () Press the [CHECK] button twice. () Set refrigerant address with [TEMP] button if system control is used. (4) Press the [ON/OFF] button to stop the self-check. A CHECK button B Refrigerant address C TEMP button D IC : Indoor unit OC : Outdoor unit E Check code C PAR-0MAA B CHECK ERROR CODE TEMP. TIMER SET CHECK MODE ON/OFF FILTER CHECK TEST A CHECK CHECK E ERROR CODE CHECK MODE D CHECK MODE For description of each check code, refer to the following table. Check code Symptom 50 Room temperature thermistor error 50 RT, RT, Outdoor thermistor error 50 Drain sensor error 50 Drain pump error 50 Freezing safeguard operation 0405, 50, 40, 50 Outdoor unit error 68~684 Signal error between remote controller and indoor units 6800 Communication error between indoor and outdoor units alarm history F F F F unit On wired remote controller Check code displayed in the LCD.

12 6-. Trouble shooting () In case of being indicated irregularity on the self diagnoses Check code 6800 Mis-wiring Phenomenon Cause Wiring between the indoor and outdoor is coming off. Countermeasure Check the wiring out between the indoor and outdoor. Difference of wiring polarity between the indoor and outdoor. Indoor-outdoor signal error Trouble of the outdoor inverter P.C. board. Check the outdoor inverter P.C. board. Refer to the TECHNICAL & SERVICE MANUAL of outdoor unit. Trouble of the Indoor controller board. Exchange the Indoor controller board. 50 Pipe temperature thermistor / Liquid. Mis-connecting of the pipe temperature thermistor / Liquid. Reinsert the connector (CN). Trouble of the pipe temperature thermistor / Liquid. Check the resistance value of the thermistor. Trouble of the Indoor controller board. Exchange the Indoor controller board. Condenser / evaporator temperature thermistor Mis-connecting of the condenser / evaporator temperature thermistor. Reinsert the connector (CN9). Trouble of the condenser / evaporator temperature thermistor. Check the resistance value of the thermistor. Trouble of the Indoor controller board. Exchange the Indoor controller board. Outdoor thermistor Mis-connecting of the outdoor thermistor. Reinsert the connector. Trouble of the outdoor thermistor. Check the resistance value of the thermistor. Trouble of the outdoor inverter P.C. board. Exchange the outdoor inverter P.C. board. 50 Room temperature thermistor Mis-connecting of the room temperature thermistor. Reinsert the connector (CN0). Trouble of the room temperature thermistor. Check the resistance value of the thermistor. Trouble of the Indoor controller board. Exchange the Indoor controller board. 50 Freezing protection is working. ) Short cycle of air cycle ) Dirty air filter ) Damaged fan 4) Abnormal refrigerant ) Clear obstructions from air cycle. ) Clean the air filter ) Check the fan 4) Check the refrigerant temperature Malfunction of outdoor unit Malfunction of outdoor unit Refer to the TECHNICAL & SERVICE MANUAL of outdoor unit.

13 () Other case Phenomenon Cause Countermeasure t working of remote controller switch ON/OFF A connector attaching the panel to the body is not connected. Short circuit the protecting parts in the Indoor controller board. Trouble of the Indoor controller board. Connect it. Check the varistor (ZNR) and fuse (FUSE) out in the Indoor controller board. Check the Indoor controller board out. Wiring between the indoor and the wired remote controller is coming off. Trouble of the remote controller. Check the wiring between the Indoor and the wired remote controller. Exchange the remote controller. Working the Indoor units and not working the outdoor units. Wiring between the indoor and outdoor is coming off. Difference of wiring polarity between the indoor and outdoor. Trouble of the outdoor inverter P.C. board. Check the wiring out between the indoor and outdoor. Check the outdoor inverter P.C. board. Trouble of the contactor (5C). Exchange the contactor. t rotating the fan in the indoor unit. Malfunction of outdoor unit. Fan motor connector is coming off. Trouble of the Indoor controller board. Trouble of the fan motor. Refer to the TECHNICAL & SERVICE MANUAL of outdoor unit. Check the connector out. Check the fan motor output of the Indoor controller board. Check the resistance value between the each tap of fan motor. Horizontal vane doesn't work. A connector attaching the panel to the body is not connected. Fixing of horizontal vane. Connect it. Check if the connector for vane motor is connected.

14 Check of indoor controller board and indoor fan motor Check code : 6800 Error was found in the signal transmitted or received between the indoor and outdoor units. Connection is defective. Is the connecting wire between the indoor and outdoor units connected properly? Remove the devices. Are there any devices emitting noise near the power supply or the connecting wire between the indoor and outdoor units? Turn off the power supply and turn it on again to operate the unit in cooling or heating mode. rmal Operation lamp blinks once in a fixed period. Indoor controller board is defective. Check code : 50 Check the room temperature thermistor. Is the connector CN0 on the indoor controller board connected? Measure the resistance of room temperature thermistor. Connection is defective. Room temperature thermistor is defective. Is the resistance 0 (short circuit) or (open circuit)? Turn off the power supply and turn it on again to operate the unit in cooling mode. rmal Operation lamp blinks twice in a fixed period. Indoor controller board is defective. 4

15 Check code : 50 Is the error of indoor unit? Refer to the TECHNICAL & SERVICE MANUAL of outdoor unit. Check the condenser/evaporator temperature thermistor. Check the pipe temperature thermistor / liquid. Is the connector CN9 on the indoor controller board connected? Is the connector CN on the indoor controller board connected? Measure the resistance of condenser/evaporator temperature thermistor. Measure the resistance of the pipe temperature thermistor / liquid. Connection is defective. Connection is defective. Condenser/evaporator temperature thermistor is defective. Is the resistance 0 (short circuit) or (open circuit)? Pipe temperature thermistor / liquid is defective. Is the resistance 0 (short circuit) or (open circuit)? Turn off the power supply and turn it on again to operate the unit in cooling mode. rmal Operation lamp blinks twice in a fixed period. Indoor controller board is defective. Indoor fan motor does not rotate. Turn off the power supply and check the connectors FAN and on the indoor controller board visually. Connection is defective. Are the connectors FAN and connected? Measure the resistance of connectors FAN and on the indoor controller board. Is the resistance 0 (short circuit) or (open circuit)? Indoor controller board is defective. Indoor fan motor is defective. 5

16 6-4. Test point of indoor controller board Indoor controller board Condenser/evaporator temperature thermistor (RT) Pipe temperature thermistor/liquid (RT) Room temperature thermistor (RT) Drain sensor (DS) 50 Room temperature thermistor (RT) Pipe temperature thermistor/liquid (RT) Condenser/evaporator temperature thermistor (RT) < Thermistor for lower temperature > Power supply input 0-40V AC 40 Fuse 50V AC.5A Resistance (K") Temperature (:) 6

17 6-5. Trouble criterion of main parts SEZ-AAR.TH SEZ-A8AR.TH SEZ-A4AR.TH Part name Room temperature thermistor (RT) Pipe temperature thermistor/liquid (RT) Condenser/evaporator temperature thermistor (RT) Measure the resistance with a tester. (Part temperature 0 C ~ 0 C) rmal 8kΩ~0kΩ Check method and criterion Abnormal Opened or short-circuited Indoor fan motor (MF) Measure the resistance between the terminals with a tester. (Coil wiring temperature 0 C ~ 0 C) BLK BLU YLW BRN RED ORN WHT P : Thermal fuse 45 ± C P GRN YLW WHT-BLK BLK-BLU BLU-YLW YLW-BRN BRN-RED AAR 4.4~6.Ω 9.0~0.6Ω 5.4~7.5Ω.6~.7Ω 47.9~5.9Ω rmal A8AR 55.5~68.Ω 48.~5.Ω 7.8~9.4Ω 7.6~8.Ω 7.6~40.7Ω A4AR 97.0~05Ω 5.8~58.Ω 4.0~5.Ω 6.~6.9Ω 7.0~9.Ω Abnormal Opened or short-circuited 7

18 7 DISASSEMBLY PROCEDURE SEZ-AAR.TH SEZ-A8AR.TH SEZ-A4AR.TH OPERATING PROCEDURE. Removing the electrical parts () Remove the screws and the electrical parts cover. (See Photo.) Indoor controller board (I.B) Compressor contactor (5C) Fuse (FUSE) Varistor (ZNR) Terminal block (TB) (See Photo.) Photo. PHOTOS Service panel (Pipe temperature thermistor / liquid) Electrical parts cover Drain pan Set screws Service panel (Condenser / evaporator temperature thermistor) Set screws (for drain pan) Front panel. Removing the pipe temperature thermistor (RT) () Remove the electrical parts cover. (Refer to.) () Remove the screws and the service panel. (See Photo.) () Remove the thermistor (RT) from the holder. (See Photo 4.) (4) Remove the connector (CN) from the indoor controller board and pull the white wire of thermistor (RT) out. Photo. Terminal block Indoor controller box Varistor. Removing the condenser / evaporator temperature thermistor (RT) () Remove the electrical parts cover. (Refer to.) () Remove the screws and the service panel. (See Photo.) () Remove the thermistor (RT) from the holder. (See Photo 4.) (4) Remove the connector (CN9) from the indoor controller board and pull the black wire of thermistor (RT) out. Photo. Service panel Indoor controller board Screws Fuse Compressor contactor Photo 4. Pipe temperature thermistor / liquid (RT) Screws Condenser / evaporator temperature thermistor (RT) 8

19 OPERATING PROCEDURE PHOTOS 4. Removing the room temperature thermistor (RT) Photo 5. () Remove the electrical parts cover. (Refer to.) () Remove the front panel at fan side. ( screws) (See Photo.) () Remove the thermistor (RT) from the separator (panel). (See Photo 6.) (4) Disconnect the connector (CN0)from the indoor controller board and pull the lead wire of thermistor (RT) out. Claws Motor bands Fan casing Claws Screws Fan motor Photo 6. Fan casing Separator (panel) Fan motor Room temperature thermistor (RT) 5. Removing the sirocco fan and the fan motor (MF). () Remove the electrical parts cover. (Refer to.) () Remove the front panel at fan side.( screws) (See Photo.) () Disconnect the fan motor connector (FAN, FAN) from the indoor controller board. (See Photo.) (4) Undo the 4 claws and remove the fan claws.(down side) <Either left or right> (See Photo 5.) (5) Remove the motor bands. <A screw each on left and right.> (See Photo 5.) (6) Disconnect the earth wire from the fan motor leg. (See Photo 7.) (7) Remove the fan motor and the sirocco fan by assembly. (See Photo 7.) (8) Unscrew the setting screw and remove the sirocco fan. <Either left or right> (See Photo 7.) Photo 7. Set screw Earth wire 9

20 OPERATING PROCEDURE PHOTOS 6. Removing the drain pan () Unscrew each set screw on the right and left, and remove the drain pan pushing it toward the the back. (See Photo.) Photo 8. Screws 7. Removing the heat exchanger () Remove the drain pan. (Refer to.) () Remove the Under flange at heat exchanger side. (6 screws) (See Photo 8.) () Remove the 4 screws of heat exchanger.( screws each on left and right) (See Photo 9.) (4) Remove the thermistor (RT) from the holder. (Refer to.) (5) Remove the thermistor (RT) from the holder. (Refer to.) (6) Remove the service panel.( screws ) (See Photo 9.) (7) Put the heat exchanger down to the fan motor and pull it toward you. (See Photo 9.) Under flange Photo 9. Screws (for heat exchanger) Service panel Screws (for service panel) Heat exchanger 0

21 8 PARTS LIST INDOOR UNIT STRUCTURAL PARTS SEZ-AAR.TH SEZ-A8AR.TH SEZ-A4AR.TH Part number that is circled is not shown in the illustration. Q'ty/set. Parts. Parts name Specification SEZ- Remarks (Drawing.) AAR.TH A8AR.TH A4AR.TH E E E E E E E E LEFT SIDE PANEL SIROCCO FAN FAN MOTOR RUBBER MOUNT FAN MOTOR FAN MOTOR FAN MOTOR ROOM TEMPERATURE THERMISTOR FRONT PANEL PK6V9-EF PK6V-EF PK6V50-EF E DRAIN PAN E E CONDENSER / EVAPORATOR TEMPERATURE THERMISTOR PIPE TEMPERATURE THERMISTOR / LIQUID E INDOOR HEAT EXCHANGER E E E E E E E INDOOR HEAT EXCHANGER INDOOR HEAT EXCHANGER RIGHT SIDE PANEL SEPARATOR ASSY LEFT LEG BASE RIGHT LEG <PCS/SET> Wiring Recommended Diagram Symbol Q'ty MF MF MF RT RT RT Price Unit Amount

22 STAND BY DEFROST CHECK CENTRALLY CONTROLLED ON OFF CLOCK ERROR CODE Hr. NOT AVAILABLE C FILTER CHECK MODE TEST RUN FUNCTION INDOOR UNIT ELECTRICAL PARTS SEZ-AAR.TH SEZ-A8AR.TH SEZ-A4AR.TH C POWER SUPPLY L N TO OUTDOOR UNIT TEMP. ON/OFF N TO REMOTE CONTROLLER N Part numbers that is circled is not shown in the illustration.. Parts. Parts name Specification E INDOOR CONTROLLER BOARD E INDOOR CONTROLLER BOARD E INDOOR CONTROLLER BOARD E COMPRESSOR CONTACTOR E0 7 8 E FUSE VARISTOR 50/.5A E E E TERMINAL BLOCK TERMINAL BLOCK TERMINAL BLOCK 4P P P E REMOTE CONTROLLER E REMOTE CONTROLLER CABLE E CONTROLLER COVER Q'ty/set Wiring Recommended Price Remarks Diagram (Drawing.) Symbol Q'ty Unit Amount SEZ- AAR.TH A8AR.TH A4AR.TH I.B I.B I.B 5C FUSE ZNR TB TB TB R.B

23 9 OPTIONAL PARTS 9-. REFRIGERANT PIPES The air conditioner has flared connections its indoor and outdoor sides. Please use the optional extension pipe as follows. Applied unit SEZ-AAR.TH SEZ-A8AR.TH SEZ-A4AR.TH Models MAC-680PI MAC-68PI MAC-68PI MAC-68PI MAC-684PI MAC-670PI MAC-67PI MAC-67PI MAC-67PI MAC-674PI MAC-860PI MAC-86PI MAC-86PI MAC-86PI MAC-864PI Pipe length m 5m 7m 0m 5m m 5m 7m 0m 5m m 5m 7m 0m 5m Cross-section Pipe size O.D.mm (in.) A-Gas {9.5 (/8) {.7 (/) {5.88 (5/8) B-liquid {6.5 (/4) Insulation C D {7 { { {7 Additional refrigerant charge R40A (g) AIR FILTER Applied unit Models SEZ-AAR.TH SEZ-A8AR.TH SEZ-A4AR.TH PAC FT

24 HEAD OFFICE : MITSUBISHI DENKI BLDG., --, MARUNOUCHI, CHIYODA-KU, TOKYO 00-80, JAPAN CCopyright 004 MITSUBISHI ELECTRIC ENGINEERING CO., LTD. Distributed in Sep OC0 REVISED EDITION-A PDF 8 Distributed in Mar OC0 PDF 8 Made in Japan. New publication, effective Sep Specifications subject to change without notice.