SPLIT-TYPE, HEAT PUMP AIR CDITIERS December No. OCH7 REVISED EDITI-B TECHNICAL & SERVICE MANUAL RA R7C R Indoor unit [Model names] PKFY-PVKM-E PKFY-PVKM-E [Service Ref.] PKFY-PVKM-E.TH PKFY-PVKM-ER.TH PKFY-PVKM-E.TH PKFY-PVKM-ER.TH Revision: PKFY-P/VKM-ER.TH have been added in REVISED EDITI-B. Some descriptions have been modified. Please void OCH7 REVISED EDITI-A. Note: This manual describes only service data of the indoor units. RoHS compliant products have <G> mark on the spec name plate. CTENTS INDOOR UNIT. TECHNICAL CHANGES.... SAFETY PRECAUTI.... PART NAMES AND FUNCTIS.... SPECIFICATI.... OUTLINES AND DIMENSIS.... WIRING DIAGRAM... 7 7. REFRIGERANT SYSTEM DIAGRAM... 9. TROUBLESHOOTING...9 9. DISASSEMBLY PROCEDURE... 7 PARTS CATALOG (OCB7)
TECHNICAL CHANGES PKFY-PVKM-E.TH PKFY-PVKM-ER.TH PKFY-PVKM-E.TH PKFY-PVKM-ER.TH INDOOR CTROLLER BOARD (I.B.) has been changed. (S/W version up) SAFETY PRECAUTI CAUTIS RELATED TO NEW REFRIGERANT Cautions for units utilizing refrigerant R7C Do not use the existing refrigerant piping. The old refrigerant and lubricant in the existing piping contain a large amount of chlorine which may cause the lubricant deterioration of the new unit. Use low residual oil piping If there is a large amount of residual oil (hydraulic oil, etc.) inside the piping and joints, deterioration of the lubricant will result. Store the piping indoors, and both ends of the piping sealed until just before brazing. (Leave elbow joints, etc. in their packaging.) If dust, dirt, or water enters the refrigerant cycle, deterioration of the oil and compressor trouble may result. Use ESTR, ETHER or HAB as the lubricant to coat flares and flange connection parts. If large amount of mineral oil enters, that can cause deterioration of refrigerant oil etc. Use liquid refrigerant to charge the system. Do not use a refrigerant other than R7C. If another refrigerant (R, etc.) is used, the chlorine in the refrigerant may cause the lubricant deterioration. Use a vacuum pump with a reverse flow check valve. The vacuum pump oil may flow back into the refrigerant cycle and cause the lubricant deterioration. Use the specified refrigerant only. Never use any refrigerant other than that specified. Doing so may cause a burst, an explosion, or fire when the unit is being used, serviced, or disposed of. Correct refrigerant is specified in the manuals and on the spec labels provided with our products. We will not be held responsible for mechanical failure, system malfunction, unit breakdown or accidents caused by failure to follow the instructions. Ventilate the room if refrigerant leaks during operation. If refrigerant comes into contact with a flame, poisonous gases will be released. If gas refrigerant is used to seal the system, the composition of the refrigerant in the cylinder will change and performance may drop.
[] Cautions for service After recovering the all refrigerant in the unit, proceed to working. Do not release refrigerant in the air. After completing the repair service, recharge the cycle with the specified amount of liquid refrigerant. [] Refrigerant recharging () Refrigerant recharging process Direct charging from the cylinder. R7C cylinder available on the market has a syphon pipe. Leave the syphon pipe cylinder standing and recharge it. (By liquid refrigerant) Unit Gravimeter () Recharge in refrigerant leakage case After recovering the all refrigerant in the unit, proceed to working. Do not release the refrigerant in the air. After completing the repair service, recharge the cycle with the specified amount of liquid refrigerant. [] Service tools Use the below service tools as exclusive tools for R7C refrigerant. No. Tool name Specifications Gauge manifold Only for R7C Use the existing fitting SPECIFICATIS. (UNF7/) Use high-tension side pressure of.mpa G or over. Charge hose Only for R7C Use pressure performance of.mpa G or over. Electronic scale Gas leak detector Use the detector for Ra or R7C. Adaptor for reverse flow check Attach on vacuum pump. Refrigerant charge base 7 Refrigerant cylinder For R7C Top of cylinder (Brown) Cylinder with syphon Refrigerant recovery equipment
Cautions for units utilizing refrigerant RA Do not use the existing refrigerant piping. The old refrigerant and lubricant in the existing piping contains a large amount of chlorine which may cause the lubricant deterioration of the new unit. Use low residual oil piping If there is a large amount of residual oil (hydraulic oil, etc.) inside the piping and joints, deterioration of the lubricant will result. Store the piping indoors, and both ends of the piping sealed until just before brazing. (Leave elbow joints, etc. in their packaging.) If dirt, dust or moisture enters into refrigerant cycle, that can cause deterioration of refrigerant oil or malfunction of compressor. The refrigerant oil applied to flare and flange connections must be ester oil, ether oil or alkylbenzene oil in a small amount. If large amount of mineral oil enters, that can cause deterioration of refrigerant oil etc. Charge refrigerant from liquid phase of gas cylinder. If the refrigerant is charged from gas phase, composition change may occur in refrigerant and the efficiency will be lowered. Do not use refrigerant other than RA. If other refrigerant (R etc.) is used, chlorine in refrigerant can cause deterioration of refrigerant oil etc. Use the following tools specifically designed for use with RA refrigerant. The following tools are necessary to use RA refrigerant. Tools for RA Gauge manifold Flare tool Charge hose Size adjustment gauge Gas leak detector Torque wrench Handle tools with care. If dirt, dust or moisture enters into refrigerant cycle, that can cause deterioration of refrigerant oil or malfunction of compressor. Do not use a charging cylinder. Vacuum pump adaptor Electronic refrigerant charging scale If a charging cylinder is used, the composition of refrigerant will change and the efficiency will be lowered. Use the specified refrigerant only. Never use any refrigerant other than that specified. Doing so may cause a burst, an explosion, or fire when the unit is being used, serviced, or disposed of. Correct refrigerant is specified in the manuals and on the spec labels provided with our products. We will not be held responsible for mechanical failure, system malfunction, unit breakdown or accidents caused by failure to follow the instructions. Ventilate the room if refrigerant leaks during operation. If refrigerant comes into contact with a flame, poisonous gases will be released. Use a vacuum pump with a reverse flow check valve. Vacuum pump oil may flow back into refrigerant cycle and that can cause deterioration of refrigerant oil etc.
[] Cautions for service () Perform service after recovering the refrigerant left in unit completely. () Do not release refrigerant in the air. () After completing service, charge the cycle with specified amount of refrigerant. () When performing service, install a filter drier simultaneously. Be sure to use a filter drier for new refrigerant. [] Additional refrigerant charge When charging directly from cylinder Check that cylinder for RA on the market is syphon type. Charging should be performed with the cylinder of syphon stood vertically. (Refrigerant is charged from liquid phase.) Unit Gravimeter [] Service tools Use the below service tools as exclusive tools for RA refrigerant. No. Tool name Specifications Gauge manifold Only for RA Use the existing fitting specifications. (UNF/) Use high-tension side pressure of.mpa G or over. Charge hose Only for RA Use pressure performance of.9mpa G or over. Electronic scale Gas leak detector Use the detector for Ra, R7C or RA. Adaptor for reverse flow check Attach on vacuum pump. Refrigerant charge base 7 Refrigerant cylinder Only for RA Top of cylinder (Pink) Cylinder with syphon Refrigerant recovery equipment
PART NAMES AND FUNCTIS -. Indoor unit Front grille Filter Air inlet Emergency operation switch Air outlet Louver Vane
-. WIRED REMOTE CTROLLER <PAR-MAA/PAR-MAA> Wired remote controller function * The functions which can be used are restricted according to the model. : Supported : Unsupported Function PAR-MAA/PAR-MAA Slim City multi PAR-MAA Body Product size H W D (mm) 9 9 LCD Full Dot LCD Partial Dot LCD Backlight Energy-saving Energy-saving operation schedule Automatic return to the preset temperature Restriction Setting the temperature range restriction Function Operation lock function Weekly timer On / Off timer High Power Manual vane angle The functions of the function buttons change depending on the screen. Refer to the button function guide that appears at the bottom of the LCD for the functions they serve on a given screen. When the system is centrally controlled, the button function guide that corresponds to the locked button will not appear. <Main display> Cool Room Set temp. Mode Temp. Fan Fri Auto <Main menu> Main Main menu Vane Louver Vent. (Lossnay) High power Timer Weekly timer OU silent mode Main display: Cursor Page Function buttons F F F F / button Press to turn / the indoor unit. SELECT button Press to save the setting. RETURN button Press to return to the previous screen. MENU button Press to bring up the Main menu. Backlit LCD Operation settings will appear. When the backlight is off, pressing any button turns the backlight on and it will stay lit for a certain period of time depending on the screen. When the backlight is off, pressing any button turns the backlight on and does not perform its function. (except for the ( / ) button) Function guide / lamp This lamp lights up in green while the unit is in operation. It blinks while the remote controller is starting up or when there is an error. Function button F Main display : Press to change the operation mode. Main menu : Press to move the cursor down. Function button F Main display : Press to decrease temperature. Main menu : Press to move the cursor up. Function button F Main display : Press to increase temperature. Main menu : Press to go to the previous page. Function button F Main display : Press to change the fan speed. Main menu : Press to go to the next page. 7
The main display can be displayed in two different modes: "Full" and "Basic". The factory setting is "Full". To switch to the "Basic" mode, change the setting on the Main display setting. <Full mode> * All icons are displayed for explanation. <Basic mode> Fri Fri Cool Room Set temp. Auto Cool Set temp. Auto Mode Temp. Fan Mode Temp. Fan Operation mode Indoor unit operation mode appears here. Preset temperature Preset temperature appears here. Clock (See the Installation Manual.) Current time appears here. Fan speed Fan speed setting appears here. Button function guide Functions of the corresponding buttons appear here. Appears when the buttons are locked. Appears when the On/Off timer or Night setback function is enabled. Appears when the Weekly timer is enabled. Appears while the units are operated in the energy-save mode. Appears when the / operation is centrally controlled. Appears when the operation mode is centrally controlled. Appears when the built-in thermistor on the remote controller is activated to monitor the room temperature (a). appears when the thermistor on the indoor unit is activated to monitor the room temperature. Appears when the preset temperature is centrally controlled. Indicates the vane setting. Appears when the f lter reset function is centrally controlled. Indicates when f lter needs maintenance. Room temperature (See the Installation Manual.) Current room temperature appears here. Indicates the louver setting. Indicates the ventilation setting. Appears when the preset temperature range is restricted. Most settings (except /, mode, fan speed, temperature) can be made from the Menu screen.
Menu structure Main menu Press the MENU button. Move the cursor to the desired item with the F and F buttons, and press the SELECT button. Vane Louver Vent. (Lossnay) High power Timer On / Off timer Auto-Off timer Filter information Error information Weekly timer Energy saving Auto return Schedule Night setback Restriction Temp. range Operation lock Maintenance Auto descending panel Manual vane angle Initial setting Main / Sub Clock Main display Contrast Display details Auto mode Administrator password Language selection Service Service menu Test run Drain pump test run Input maintenance info. Function setting Lossnay (City Multi only) Check Self check Maintenance password Remote controller check Not all functions are available on all models of indoor units. 9
Main menu list Setting and display items Vane Louver Vent. (Lossnay) High power Setting details Use to set the vane angle. Select a desired vane setting from f ve different settings. Use to turn / the louver. Select a desired setting from "" and "." Use to set the amount of ventilation. Select a desired setting from "Off," "Low," and "High." Use to reach the comfortable room temperature quickly. Units can be operated in the High-power mode for up to minutes. Timer On/Off timer Use to set the operation On/Off times. Time can be set in -minute increments. * Clock setting is required. Auto-Off timer Filter information Error information Weekly timer Energy saving Night setback Auto return Schedule Use to set the Auto-Off time. Time can be set to a value from to in -minute increments. Use to check the f lter status. The f lter sign can be reset. Use to check error information when an error occurs. Error code, error source, refrigerant address, unit model, manufacturing number, contact information (dealer's phone number) can be displayed. * The unit model, manufacturing number, and contact information need to be registered in advance to be displayed. Use to set the weekly operation On / Off times. Up to eight operation patterns can be set for each day. * Clock setting is required. * Not valid when the On/Off timer is enabled. Use to get the units to operate at the preset temperature after performing energy-save operation for a specif ed time period. Time can be set to a value from and in -minute increments. * This function will not be valid when the preset temperature ranges are restricted. Set the start/stop times to operate the units in the energy-save mode for each day of the week, and set the energy-saving rate. Up to four energy-save operation patterns can be set for each day. Time can be set in -minute increments. Energy-saving rate can be set to a value from % or to 9% in % increments. * Clock setting is required. Use to make Night setback settings. Select "Yes" to enable the setting, and "No" to disable the setting. The temperature range and the start/stop times can be set. * Clock setting is required. Restriction Temp. range Use to restrict the preset temperature range. Different temperature ranges can be set for different operation modes. Maintenance Operation lock Auto descending panel Manual vane angle Use to lock selected functions. The locked functions cannot be operated. Auto descending panel (Optional parts) Up / Down you can do. Use to set the vane angle for each vane to a f xed position. Initial setting Main/Sub When connecting two remote controllers, one of them needs to be designated as a sub controller. Clock Use to set the current time. Main display Use to switch between "Full" and "Basic" modes for the Main display. The default setting is "Full." Contrast Use to adjust screen contrast.
Setting and display items Initial setting Display details Auto mode Administrator password Language selection Setting details Make the settings for the remote controller related items as necessary. Clock: The factory settings are "Yes" and "h" format. Temperature: Set either Celsius ( C) or Fahrenheit ( F). Room temp. : Set Show or Hide. Auto mode: Set the Auto mode display or Only Auto display. Whether or not to use the AUTO mode can be selected by using the button. This setting is valid only when indoor units with the AUTO mode function are connected. The administrator password is required to make the settings for the following items. Timer setting Energy-save setting Weekly timer setting Restriction setting Outdoor unit silent mode setting Night set back Use to select the desired language. Service Test run Select "Test run" from the Service menu to bring up the Test run menu. Test run Drain pump test run Input maintenance Select "Input maintenance Info." from the Service menu to bring up the Maintenance information screen. The following settings can be made from the Maintenance Information screen. Model name input Serial No. input Dealer information input Function setting Make the settings for the indoor unit functions via the remote controller as necessary. LOSSNAY setting (City Multi only) Check Self check Maintenance password Remote controller check This setting is required only when the operation of City Multi units is interlocked with LOSSNAY units. Error history: Display the error history and execute delete error history. Refrigerant leak check: Refrigerant leaks can be judged. Smooth maintenance: The indoor and outdoor maintenance data can be displayed. Request cord: Details of the operation data including each thermistor temperature and error history can be checked. Error history of each unit can be checked via the remote controller. Take the following steps to change the maintenance password. When the remote controller does not work properly, use the remote controller checking function to troublushoot the problem.
-. WIRED REMOTE CTROLLER <PAR-MAA> Display Section For purposes of this explanation, all parts of the display are shown. During actual operation, only the relevant items will be lit. Identifies the current operation Shows the operating mode, etc. *Multilanguage display is available. Day-of-Week Shows the current day of the week. Time/Timer Display Shows the current time, unless the simple or Auto Off timer is set. If the simple or Auto Off timer is set, the time to be switched off is shown. Sensor indication Displays when the remote controller sensor is used. Locked indicator Indicates that remote controller buttons have been locked. Clean The Filter indicator To be displayed on when it is time to clean the filter. Centrally Controlled indicator Indicates that operation from the remote controller has been prohibited by a master controller. Timer is Off indicator Indicates that the timer is off. Temperature Setting Shows the target temperature. F C TIME SUN M TUE WED THU FRI SAT TIMER Hr AFTER AFTER ERROR CODE F C LYHr. Up/Down Air Direction indicator The indicator shows the direction of the outcoming airflow. One Hour Only indicator Displays if the airflow is set to Low or downward during COOL or DRY mode. (Operation varies according to model.) The indicator goes off in one hour, at which time the airflow direction also changes. FUNCTI FILTER WEEKLY SIMPLE AUTO Room Temperature display Shows the room temperature. The room temperature display range is - 9. The display blinks if the temperature is less than or 9 or more. Louver display Indicates the action of the swing louver. Does not appear if the louver is not running. (Power On indicator) Indicates that the power is on. Timer indicators The indicator comes on if the corresponding timer is set. Fan Speed indicator Shows the selected fan speed. Ventilation indicator Appears when the unit is running in Ventilation mode. Operation Section Temperature setting buttons Down Up Timer Menu button (Monitor/Set button) Mode button (Return button) / button Fan Speed button Filter button (<Enter> button) TEMP. / Test Run button Set Time buttons Check button (Clear button) Back MENU / FILTER Ahead Timer On/Off button (Set Day button) BACK PAR-MAA MITOR/SET DAY CLOCK OPERATI CHECK TEST CLEAR Airflow Up/Down button Louver button ( Operation button) Opening the cover To return operation number Built-in temperature sensor Ventilation button ( Operation button) Note: PLEASE WAIT message This message is displayed for approximately minutes when power is supplied to the indoor unit or when the unit is recovering from a power failure. NOT AVAILABLE message This message is displayed if an invalid button is pressed (to operate a function that the indoor unit does not have). If a single remote controller is used to operate multiple indoor units simultaneously that are different types, this message will not be displayed as far as any of the indoor units is equipped with the function. To go to next operation number
-. Wireless remote controller CHECK TEST RUN display CHECK and TEST RUN display indicate that the unit is being checked or test-run. MODEL SELECT display Blinks when model is selected. display Lights up while the signal is transmitted to the indoor unit when the button is pressed. display SET TEMP. display indicates the set desired temperature. display OPERATI MODE display Operation mode display indicates which operation mode is in effect. display The vertical direction of air flow is indicated. display FAN SPEED display indicates which fan speed has been selected. / button The unit is turned and alternately each time the button is pressed. FAN SPEED SELECT button Used to change the fan speed. MODE SELECT button Used to switch the operation mode between cooling, drying, fan, heating and auto mode. * If the outdoor unit is cool only type, the heating and auto mode are not available. CHECK-TEST RUN buttons Only press this button to perform an inspection check or test operation. Do not use it for normal operation. VANE CTROL button Used to change the air flow direction. / TEMP MODE CHECK CHECK TEST RUN MODEL SELECT C AMPM AMPM NOT AVAILABLE FAN AUTO STOP VANE AUTO START LOUVER h TEST RUN min SET RESET CLOCK CLOCK display Displays the current time. TIMER display Displays when in timer operation or when setting timer. display Displays the order of timer operation. display Displays whether timer is on or off. buttons SET TEMPERATURE button sets any desired room temperature. TIMER CTROL buttons AUTO STOP ( timer): when this switch is set, the air conditioner will be automatically stopped at the preset time. AUTO START ( timer): when this switch is set, the air conditioner will be automatically started at the preset time. h and min buttons Buttons used to set the hour and minute of the current time and timer settings. LOUVER button Changes left/right airflow direction. (Not available for this model.) CLOCK button RESET button SET button
SPECIFICATI -. Specif cations Model Power source Cooling capacity (Nominal) Heating capacity (Nominal) External finish External dimension H W D Net weight Heat exchanger Fan * * * * Power input * Current input * * * * Power input Current input Type x Quantity External static press. Motor type Motor output Driving mechanism Airflow rate (Low-High) Noise level (Low-High) (measured in anechoic room) Insulation material Air filter Protection device Refrigerant control device Connectable outdoor unit Diameter of Liquid (RA) refrigerant pipe Gas (RA) Field drain pipe size Standard Document attachment Accessory Optional parts Drain pump kit Remark kw kcal/h Btu/h kcal/h kw A kw kcal/h Btu/h kw A mm in. kg (lb) Pa mmho kw m /min L/s cfm db <A> mm (in.) mm (in.) mm (in.) PKFY-PVKM-E PKFY-PVKM-E -phase -V Hz, -phase V Hz 7.., 9,,,,,...7...,9, 7,,..7.. Plastic, MUNSELL (.Y 9./.) 7 9 -/" -/" -/" () Cross fin (Aluminum fin and copper tube) Line flow fan DC motor. Direct-drive - 7 - - 7 9 - ø9. (ø/") ø9. (ø/") ø. (ø/") ø. (ø/") Flare Flare Flare Flare Polyethylene sheet PP honeycomb Fuse LEV RA, R7C, R CITY MULTI I.D. mm (/") Installation Manual, Instruction Book PAC-SH9DM-E - - 7-9 - 9 ø9. (ø/") ø9. (ø/") ø. (ø/") ø9. (ø/") Flare Flare Flare Flare Installation Note : * Nominal cooling conditions * Nominal cooling conditions Indoor : Outdoor : Pipe length : Level difference : 7 CDB/9 CWB ( FDB/ FWB) CDB (9 FDB) 7. m (-9/ ft) m ( ft) 7 CDB/9. CWB ( FDB/7 FWB) CDB (9 FDB) m (-/ ft) m ( ft) * Electrical characteristic of cooling are included optional drain - pump. * Nominal conditions *, * are subject to JIS B-. * Due to continuing improvement, above specification may be subject to change without notice. Details on foundation work, insulation work, electrical wiring, power source switch, and other items shall be referred to the Installation Manual. * Nominal heating conditions Unit converter kcal/h = kw Btu/h = kw, CDB ( FDB) 7 CDB/ CWB ( FDB/ FWB) 7. m (-9/ ft) m ( ft) cfm = m /min. lb = kg/. *Above specification data is subject to rounding variation.
-. Electrical parts specif cations Parts name Service Ref. Room temperature thermistor Liquid pipe thermistor Gas pipe thermistor Fuse (Indoor controller board) Symbol TH TH TH TH FUSE PKFY-PVKM-E.TH PKFY-PVKM-ER.TH Resistance /k, /9.k, /.k, /.k, /.k, /.k Resistance /k, /9.k, /.k, /.k, /.k, /.k Resistance /k, /9.k, /.k, /.k, /.k, /.k V.A PKFY-PVKM-E.TH PKFY-PVKM-ER.TH Fan motor MF -Pole Output W / RCOJ-AC Vane motor MV MSBPC DCV Linear expansion valve LEV EFM-YGME DC V EFM-YGME DC V Power supply terminal block TB (L, N, ) V A Transmission terminal block TB (M, M, S) V A MA remote controller terminal block TB (, ) V A -. Sound levels PKFY-PVKM-E.TH PKFY-PVKM-ER.TH PKFY-PVKM-E.TH PKFY-PVKM-ER.TH Sound level at anechoic room : Low-High Sound level db (A) 9 - - 9.m Measurement location.m * Measured in anechoic room. -. NC curves PKFY-PVKM-E.TH PKFY-PVKM-ER.TH External static pressure : Pa Power source :,, V, Hz/V, Hz Octave band pressure level (db) db=μpa 7. High Low.. NC-.. NC-.. NC-.. NC-.. Approximate minimum audible limit on. continuous noise NC-. k k k k Octave band center frequencies (Hz) PKFY-PVKM-E.TH PKFY-PVKM-ER.TH External static pressure : Pa Power source :,, V, Hz/V, Hz Octave band pressure level (db) db=μpa 7............ Approximate minimum audible limit on continuous noise. k k k k Octave band center frequencies (Hz) High Low NC- NC- NC- NC- NC-
OUTLINES AND DIMENSIS PKFY-PVKM-E.TH PKFY-PVKM-ER.TH PKYF-PVKM-E.TH PKFY-PVKM-ER.TH Top side Unit : mm.7.7.. Left side Front side Right side Knockout hole for left piping Mount board C A 7 () 7 9 Operation lamp DEFROST/STAND BY lamp Receiver Knockout hole for right piping Front side (Grille open) Terminal block for power supply Filter hook (Gas pipe) (Liquid pipe) (Drain hose) Terminal block for transmission Terminal block for MA-remote controller Emergency operation switch (cooling / heating) Under side Piping connection department Liquid pipe Gas pipe Refrigerant pipe : 9. Flared connection : /F Refrigerant pipe :. Flared connection : /F Sleeve (purchased locally) Through hole Drain hose O.D 7 7~ B Vane (auto) Louver (manual) Knockout hole for lower piping B C Knockout hole for piping B 7 77 77 7.7 77 7. 7. 7 A 7-Φ. Tapping screw hole. 7 7 9 79. 9 7. -Φ9 Bolt hole 9. Temporarily fixing hole Center measurement hole Φ. R7.. 9. 9 9 Mount board.. 9. Indoor unit outline.. 7.. 7.. 9. 7 7 9. 9. Wall hole for left rear piping Knockout hole for left rear piping (7 ). 9 9. Wall hole for right rear piping 9 9. Min. 7 mm or greater with optional drain pump installation Required space (Indoor unit) Min.. Min. mm or greater with optional drain pump installation Air inlet Air outlet Min.. Min. Min. mm or greater with left or rear left piping or drain pump installation
BLU BLU BLU WIRING DIAGRAM PKFY-PVKM-E.TH PKYF-PVKM-E.TH SYMBOL NAME I.B INDOOR CTROLLER BOARD CN CNECTOR REMOTE SWITCH CN CN BZ BUZZER DSA SURGE ABSORBER FUSE FUSE (T.AL V) LED POWER SUPPLY (I.B) LED POWER SUPPLY (I.B) SW SW SW SWE CENTRALLY CTROL REMOTE INDICATI X AUX.RELAY DRAIN PUMP (OPTI) MOV. VARISTOR LEV LINEAR EXPANSI VALVE MF MV TB TB TB SWITCH FAN MOTOR VANE MOTOR TERMINAL POWER SUPPLY BLOCK CAPACITY CODE MODE SELECTI MODEL SELECTOR DRAIN PUMP (TEST MODE) TRANSMISSI MA-REMOTE CTROLLER SYMBOL NAME TH THERMISTOR ROOM TEMP. DETECTI ( C/kΩ, C/.kΩ) TH PIPE TEMP. DETECTI/LIQUID ( C/kΩ, C/.kΩ) TH PIPE TEMP. DETECTI/GAS ( C/kΩ, C/.kΩ) TH PIPE TEMP. DETECTI/GAS ( C/kΩ, C/.kΩ) A.B ADDRESS BOARD SWA SWITCH FAN SPEED SELECTOR SW MODE SELECTI SW ADDRESS SETTING s DIGIT SW ADDRESS SETTING ths DIGIT SW BRANCH No. S.B SWITCH BOARD SWE EMERGENCY OPERATI (HEAT) SWE EMERGENCY OPERATI (COOL) W.B PCB FOR WIRELESS REMOTE CTROLLER LED LED (OPERATI INDICATOR: GREEN) LED LED (OPERATI FOR HEATING: ORANGE ) RU RECEIVING UNIT DP DRAIN PUMP (OPTI) FS DRAIN FLOAT SWITCH (OPTI) RED MF DP MS ~ M ~ BLK WHT YLW BLU RED FUSE CNP (BLU) FAN CNMF (WHT) X BLK DC~9V RECTIFICATI GRN YLW ORN RED BRN POWER SUPPLY ~/N-V Hz V Hz TB RED FUSE BREAKER L BLU PULL (A) (A) N BOX GRN/YLW TO NEXT MV LEV INDOOR UNIT M M I.B CND CN (BLK) (GRN) LDSWE(A) (BLU) DSA CN (WHT) MOV VANE MOV CN (WHT) CNRU LEV CN (YLW) CN (WHT) (YLW) FLOAT SW LED U BZ CNF (WHT) GAS CNG (BLK) CN (WHT) LIQUID/GAS CN (WHT) ADDRESS CN ADDRESS CN (RED) (RED) INTAKE CN (RED) LED M-NET SW SW SW MA-REMOC CNM(BLU) CNA (BLU) 7 See fig. BRN RED BLU ORN ORN ORN YLW WHT TB LED LD(B) RU LED W.B When attaching drain pump(option), remove the jumper connector CNF and fit the drain float switch (FS). t t t t TO MA-REMOTE CTROLLER DC.7-V M TO OUTDOOR UNIT M BC CTROLLER REMOTE CTROLLER S TB (SHIELD) DC-V A.B TH TH TH TH LD SWE(B) SWE SWE S.B When attaching drain pump (option) FS FLOAT SW CNF (WHT) <fig: > Models SW P P ADDRESS CN (RED) SW ADDRESS 79 CN SWA (RED) SW SW SW ths DIGIT The black square ( ) indicates a switch position. s DIGIT BRANCH No. LED on indoor board for service Mark Meaning Function LED Main power supply Main power supply (Indoor unit:-v) Power on Iamp is lit LED Power supply for MA-Remote controller Power supply for MA-Remote controller on Iamp is lit NOTES:. At servicing for outdoor unit, always follow the wiring diagram of outdoor unit.. In case of using MA-Remote controller, please connect to TB. (Remote controller wire is non-polar.). In case of using M-NET, please connect to TB. (Transmission line is non-polar.). Symbol [S] of TB is the shield wire connection.. Symbols used in wiring diagram above are, : terminal block, :connecter.. The setting of the SW dip switches differs in the capacity. For the detail, refer to fig.. 7
BLU BLU BLU 7 7 F 7 9 A B C D E PKYF-PVKM-ER.TH PKFY-PVKM-ER.TH SYMBOL NAME I.B INDOOR CTROLLER BOARD CN CNECTOR REMOTE SWITCH CN CENTRALLY CTROL CN REMOTE INDICATI CN IT TERMINAL BZ BUZZER FUSE FUSE (T.AL V) LED POWER SUPPLY(I.B) LED POWER SUPPLY(I.B) SW SW SW SWE X LEV MF MV TB TB TB SWITCH CAPACITY CODE MODE SELECTI MODEL SELECTOR DRAIN PUMP(TEST MODE) AUX.RELAY DRAIN PUMP(OPTI) LINEAR EXPANSI VALVE FAN MOTOR VANE MOTOR TERMINAL POWER SUPPLY BLOCK TRANSMISSI MA-REMOTE CTROLLER SYMBOL NAME TH THERMISTOR ROOM TEMP. DETECTI (ºC/kΩ, ºC/.kΩ) TH PIPE TEMP. DETECTI / LIQUID (ºC/kΩ, ºC/.kΩ) TH PIPE TEMP. DETECTI / GAS (ºC/kΩ,ºC/.kΩ) TH PIPE TEMP. DETECTI / GAS (ºC/kΩ, ºC/.kΩ) A.B ADDRESS BOARD SWA SWITCH FAN SPEED SELECTOR SW MODE SELECTI SW ADDRESS SETTING s DIGIT SW ADDRESS SETTING ths DIGIT SW BRANCH No. S.B SWITCH BOARD SWE EMERGENCY OPERATI(HEAT) SWE EMERGENCY OPERATI(COOL) W.B PCB FOR WIRELESS REMOTE CTROLLER LED LED(OPERATI INDICATOR:GREEN) LED LED(PREPARATI FOR HEATING : ORANGE) RU RECEIVING UNIT DP DRAIN PUMP (OPTI) FS DRAIN FLOAT SWITCH (OPTI) POWER SUPPLY ~/N-V Hz TB V Hz RED L FUSE BREAKER BLU PULL (A) (A) N BOX MF GRN/YLW DP TO NEXT MV LEV INDOOR MS M UNIT M M ~ ~ I.B CND CN (BLK) (GRN) LDSWE(A) (BLU) FUSE CN CNP (WHT) FAN (BLU) VANE CNMF CNRU CN CN LEV CN (WHT) (YLW) (WHT) X (WHT) (YLW) BZ FLOAT SW LED CNF (WHT) + SWE CN GAS (WHT) CNG (BLK) CN (WHT) LIQUID/GAS CN (WHT) ADDRESS ADDRESS CN CN Pair J INTAKE No. J CN (RED) (RED) (RED) LED M-NET SW SW SW MA-REMOC CNM(BLU) CNA(BLU) 7 RED BLK WHT YLW BLU RED BLK See fig: GRN YLW ORN RED BRN BRN RED BLU ORN ORN ORN YLW WHT TB M M S TB (SHIELD) NOTES:. At servicing for outdoor unit,always follow the wiring diagram of outdoor unit.. In case of using MA-Remote controller, please connect to TB. (Remote controller wire is non-polar.). In case of using M-NET, please connect to TB. (Transmission line is non-polar.). Symbol [S]of TB is the shield wire connection.. Symbols used in wiring diagram above are, : terminal block, :connecter..the setting of the SW dip switches differs in the capacity. For the detail, refer to the fig:. The black square( ) indicates a switch position.< > Models SW P P LED on indoor board for service Mark Meaning Function LED LED tº tº TO MA-REMOTE CTROLLER DC.7-V tº tº TO OUTDOOR UNIT BC CTROLLER REMOTE CTROLLER DC-V LED LD(B) RU LED W.B When attaching drain pump(option), remove the jumper connector CNF and fit the drain float switch (FS). ADDRESS CN (RED) SW ADDRESS 79 CN SWA (RED) SW SW SWC SW A.B TH TH TH TH Main power supply Power supply for MA-Remote controller 9 ths DIGIT 9 s DIGIT LD SWE(B) SWE SWE S.B When attaching drain pump (option) FS FLOAT SW CNF (WHT) BRANCH No. IT terminal PAC-ITAD-E CN(WHT) Main power supply (Indoor unit:-v) Power on Iamp is lit Power supply for MA-Remote controller on Iamp is lit IT terminal PAC-ITAD-E CN(WHT) CN(WHT) CN(GRN) In connecting optional IT terminal, use either CN or CN which is not connected. Be careful for connector colors.
7 REFRIGERANT SYSTEM DIAGRAM PKFY-PVKM-E.TH PKFY-PVKM-ER.TH PKYF-PVKM-E.TH PKFY-PVKM-ER.TH Gas pipe thermistor () TH Strainer (#mesh) Gas pipe Gas pipe thermistor () TH Flare connection Liquid pipe thermistor TH Heat exchanger Room temparature thermistor TH Liquid pipe Linear expansion valve Strainer (#mesh) Strainer (#mesh) Strainer (#mesh) Item Model PKFY-PVKM-E Unit : mm (inch) PKFY-PVKM-E Gas pipe. (/). (/) Liquid pipe 9. (/) 9. (/) TROUBLESHOOTING -. HOW TO CHECK THE PARTS PKFY-PVKM-E.TH PKYF-PVKM-E.TH PKFY-PVKM-ER.TH PKFY-PVKM-ER.TH Parts name Room temperature thermistor (TH) Liquid pipe temperature thermistor (TH) Gas pipe temperature thermistor (TH,) Vane motor (MV) Red Yellow Brown Connect pin No. Orange M Green Check points Disconnect the connector then measure the resistance with a tester. (At the ambient temperature - ) Normal.k ~9.k Abnormal Open or short Refer to the next page for the details. Measure the resistance between the terminals with a tester. (Coil temperature ) - Brown-Red - Brown-Orange Normal ± 7% - Brown-Yellow - Brown-Green Abnormal Open or short Fan motor (MF) Refer to --. Linear expansion valve (LEV) LEV CN White Yellow Orange Blue Red Brown Disconnect the connector then measure the resistance valve with a tester. (Coil temperature ) ()-() White-Red Normal ()-() Yellow-Brown ± % ()-() Orange-Red 9 ()-() Blue-Brown Abnormal Open or short
--. Thermistor <Thermistor Characteristic graph> Thermistor for lower temperature Room temperature thermistor (TH) Liquid pipe temperature thermistor (TH) Gas pipe temperature thermistor (TH) (TH) < Thermistor for lower temperature > Thermistor R=k" ± % Fixed number of B= ± % Rt=exp { ( 7+t 7 ) } : k" : 9.k" :.k" :.k" :.k" :.k" Resistance (K ) - - Temperature ( ) --. Liner expansion valve Operation summary of the linear expansion valve Linear expansion valve opens/closes through stepping motor after receiving the pulse signal from the indoor controller board. Valve position can be changed in proportion to the number of pulse signal. <Connection between the indoor controller board and the linear expansion valve> Controller board DCV Linear expansion valve Brown Blue Red Drive circuit White Red M Brown Yellow Orange Blue Orange Yellow White Connector(CN) Note : Since the number of the connector at the controller board side and the relay connector are different, follow the color of the lead wire.
<Output pulse signal and the valve operation> Output (Phase) { { { { Output Linear expansion valve operation Closing a valve : Opening a valve : The output pulse shifts in above order. When linear expansion valve operation stops, all output phase become. At phase interruption or when phase does not shift in order, motor does not rotate smoothly and motor will lock and vibrate. When the switch is turned on, pulse closing valve signal will be sent till it goes to point A in order to define the valve position. Open Valve position (capacity) A E Close Open D C When the valve moves smoothly, there is no noise or vibration occurring from the linear expansion valves : however, when the pulse number moves from E to A or when the valve is locked, more noise can be heard than in a normal situation. Noise can be detected by placing the ear against the screw driver handle while putting the screw driver tip to the linear expansion valve. Outdoor unit RA model : pulse Outdoor unit R/R7C model : pulse Opening a valve all the way Close B Pulse number Extra tightening (~ pulse) Troubleshooting Symptom Operation circuit failure of the micro processor Linear expansion valve mechanism is locked. Short or breakage of the motor coil of the linear expansion valve Valve does not close completely. Wrong connection of the connector or contact failure Check points Disconnect the connector on the controller board, then connect LED for checking. k LED Countermeasures Exchange the indoor controller board in case of drive circuit failure. When power is turned on, pulse signals will output for seconds. There must be some defects in the operation circuit if the LED does not light while the signals are output or keeps lighting even after the signals stop. Motor will idle and make a ticking noise when the motor is Exchange the linear expansion valve. operated while the linear expansion valve is locked. This ticking sound is the sign of the abnormality. Measure the resistance between each coil (white-red, yellowbrown, orange-red, blue-brown) using a tester. It is normal if the resistance is in the range of ±%. Thermistor (Liquid pipe) Linear expansion valve To check the linear expansion valve, operate the indoor unit If large amount of refrigerant is leaked, exchange in fan mode and at the same time operate other indoor units in cooling mode, then check the pipe temperature <liquid the linear expansion valve. pipe temperature> of the indoor unit by the outdoor multi controller board operation monitor. During fan operation, linear expansion valve is closed completely and if there is any leaking, detecting temperature of the thermistor will go lower. If the detected temperature is much lower than the temperature indicated in the remote controller, it means the valve is not closed all the way. It is not necessary to exchange the linear expansion valve, if the leakage is small and not affecting normal operation. Check the color of lead wire and missing terminal of the connector. Exchange the linear expansion valve. Disconnect the connector at the controller board, then check the continuity.
--. DC Fan motor (fan motor/indoor controller circuit board) Check method of DC fan motor (fan motor/indoor controller circuit board) Notes High voltage is applied to the connecter (CNMF) for the fan motor. Pay attention to the service. Do not pull out the connector (CNMF) for the motor with the power supply on. (It causes trouble of the indoor controller circuit board and fan motor.) Self check Symptom : The indoor fan cannot turn around. Wiring contact check Contact of fan motor connector (CNMF) Is there contact failure? Yes Wiring recovery No Power supply check (Remove the connector (CNMF)) Measure the voltage in the indoor controller circuit board. TEST POINT : VDC (between (+) and (-) of the fan connector): VDC DC~V TEST POINT : VCC (between (+) and (-) of the fan connector): VCC DCV Is the voltage normal? No Indoor controller board fuse check Yes Is the fuse normal? Yes Replace the indoor controller board. NG No Replace the fuse. Check the operation OK END Check the operation NG Replace the fan motor. OK END Sensor signal check Measure the voltage between CNMF and DC V and DC V in the door controller circuit board. Does the voltage repeat DC V and DC V? Yes Replace the indoor controller board. OK No Replace the fan motor. Yes OK Check the operation of fan. NG Replace the indoor controller board. END Check the operation END NG Replace the fan motor.
-. Function of Dip switch PKFY-PVKM-E.TH PKFY-PVKM-ER.TH Switch Pole Function SW Mode selection SW Capacity code switch SW Function selection SW Model Select SW s digit address setting SW ths digit address setting SW Branch No. Setting 7 9 ~ 7 ~ Rotary switch Rotary switch Thermistor<Room temperature> position PKYF-PVKM-E.TH PKFY-PVKM-ER.TH Operation by switch Filter clogging detection Provided Not provided Filter cleaning sign, hr hr Fresh air intake * Not effective Not effective Switching remote controller display Thermo signal indication Fan output indication Thermo operation at heating mode Low * Extra low * Humidifier control Fan operation at Heating mode Air flow set in case of heat thermo Setting air flow * Depends on SW-7 Auto restart function Effective Not effective Power / by breaker Effective Not effective Heat pump/cool only Cooling only Heat pump Not used Not used Built-in remote controller Vane horizontal angle Second setting * First setting Changing the opening of linear expansion valve during thermo Effective Heating degree up Not effective Target superheat setting * Indoor unit Not effective Effective Target subcool * SW 9 7 E D C B SW 9 7 SW A F 9 7 P P How to set addresses Example : If address is "", remain SW (for over ) at "", and match SW (for to 9) with "". How to set branch numbers SW (Series R only) Match the indoor unit s refrigerant pipe with the BC controller s end connection number. Remain other than series R at "". Effective timing Under suspension Before power supply Under suspension Before power supply Before power supply NOTE: * SW-7 Remarks Address board <Initial setting> 79 SW- Indoor controller board Indoor controller board <Initial setting> 7 Fan speed Extra low Low Setting air flow Stop * It is impossible to intake the fresh air. <Initial setting> Set for each capacity * Second setting is same as first setting. * Please do not change SW-7 and -. Indoor controller board Address board <Initial setting> SW SW 9 7 E D C B A F 9 7 9 7 Address board <Initial setting> SW
Switch J, J Wireless remote controller Pair No. Jumper Operation by switch To operate each indoor unit by each remote controller when installed indoor units or more are near, Pair No. setting is necessary. Pair No. setting is available with the patterns (Setting patterns A to D).. Make setting for J, J of indoor controller board and the Pair No. of wireless remote controller. You may not set it when operating it by one remote controller. Setting for indoor unit Cut jumper wire J, J on the indoor controller board according to the table below. Wireless remote controller pair number: Setting operation. Press the SET button (using a pointed implement). Check that the remote controller's display has stopped before continuing. MODEL SELECT flashes, and the model No. ( digits) appears (steadily-lit).. Press the MINUTE button twice. The pair number appears flashing.. Press the temperature buttons to select the pair number to set.. Press the SET button (using a pointed implement). The set pair number is displayed (steadily-lit) for seconds, then disappears. Effective timing Under operation or suspension SET button Remarks <Initial setting> Pattern A / MODE CHECK TEST RUN SET MODEL SELECT FAN VANE LOUVER RESET TEMP CLOCK AUTO STOP AUTO START h min Pair No. Model No. Temperature button Minute button Indoor controller jumper wire Pair No. of wireless remote controller Setting pattern J J A Initial setting B Cut C Cut D Cut Cut * Pair No.-9 of wireless remote controller is setting pattern D.
-. TEST POINT DIAGRAM --. Indoor controller board PKFY-PVKM-E.TH PKFY-PVKM-ER.TH PKFY-PVKM-E.TH PKFY-PVKM-ER.TH CNMF CNM Connect to the terminal block (TB) (M-NET transmission connecting wire) -VDC (non-polar) Power supply from outdoor unit Connect to the fan motor (MF) - : DC~V - : DCV - : DC~V - : DC or DCV CNP Drain pump output (DP) - : -VAC CND Power supply for indoor controller board - : -VAC FUSE.A V LED Main power supply (Indoor unit : -V) CN Vane motor output VDC pluse CNRU Connect to the wireless remote controller board (W.B) LDSWE(A) Connect to the wireless remote controller board (S.B) SW Capacity setting CN Remote indicator -: Status lamp VDC ( : +) Fan motor output (SW- ) Thermostat (SW- ) -: Cooling/Dry status lamp VDC ( : +) -: Heating status lamp VDC ( : +) SW Model selection SW Function setting Jumper wire J, J Pair No. setting for wireless remote controller LED Power supply for MA-Remote controller CNA Connected to the termial block (TB) (MA-Remote controller connecting wire) - :.7-V DC (Pin (+)) CN Remote switch CNG Pipe temperature thermistor Gas (TH) CN Room temperature thermistor (TH) CN Pipe temperature thermistor - : Liquid (TH) - : Gas (TH) The voltage range of DCV in this page is between DC. V to DC.7 V. CNF Drain float switch (FS) CN Liner expansion valve (LEV) output VDC pluse output CN Centrally control - : Control signal VDC pulse input ( : +) - : Operation indicator VDC ( : +) - : Malfunction indicator VDC ( : +) LD SWE (B) Connect to the indoor controller board (I.B)
--. Wireless remote controller board PKFY-PVKM-E.TH PKFY-PVKM-ER.TH PKFY-PVKM-E.TH PKFY-PVKM-ER.TH LD Connect to the indoor controller board (I.B) --. Address board PKFY-PVKM-E.TH PKFY-PVKM-ER.TH PKFY-PVKM-E.TH PKFY-PVKM-ER.TH SW Function setting SW Address setting ths DIGIT SW Address setting s DIGIT SW Branch No.
9 DISASSEMBLY PROCEDURE PKFY-PVKM-E.TH PKFY-PVKM-ER.TH OPERATI PROCEDURE. REMOVING THE PANEL PKFY-PVKM-E.TH PKFY-PVKM-ER.TH () Press and unlock the knobs on both sides of the front grille and lift the front grille until it is level. Pull the hinges forward to remove the front grille. (See Photo ) () Remove screw caps of the panel. Remove screws. (See Photo ) () Unfix hooks. (See Figure ) () Hold the lower part of both ends of the panel and pull it slightly toward you, and then remove the panel by pushing it upward. () Remove the screw of the corner box. (See Photo ) Remove the corner box. Photo Be careful when removing heavy parts. PHOTOS & ILLUSTRATIS Front grille Screws and screw caps Screws Screw of the corner box Figure Hooks. REMOVING THE ADDRESS BOARD, THE INDOOR CTROLLER BOARD, THE WIRELESS CTROLLER BOARD () Remove the panel and the corner box. (Refer to procedure ) () Remove the screw and hook of address board case. (See Photo ) () Disconnect the connectors of address board. () Remove the front and side electrical box covers (each screw). () Disconnect the connectors on the indoor controller board. (See Photo ) () Remove the switch board holder and open the cover. (7) Pull out the indoor controller board toward you then remove the indoor controller board and switch board. (See Photo ) () Remove the holder of wireless remote controller board. (9) Disconnect the connector of wireless remote controller board and remove the wireless remote controller board from the holder. Photo Water cut Photo Screw of address board case Screw of electrical box cover (Front) Hook Screw of electrical box cover (side) Switch board holder Holder of wireless remote controller board Electrical box cover (Front) Indoor controller board Terminal block (TB) Terminal block (TB) Terminal block (TB) Room temp. thermistor (TH) 7
OPERATI PROCEDURE PHOTOS. REMOVING THE ELECTRICAL BOX () Remove the panel and the corner box. (Refer procedure to ) () Remove the screw and hook of address board case. () Remove the front and side electrical box covers (each screw). () Remove the transmission wiring of TB, the power supply wiring of TB and the wiring of MA-remote controller (TB). () Disconnect the connectors on the indoor controller board. () Disconnect the connector for ground wire. (7) Remove the screw on lower side of the electrical box. (See Photo ) () Push up the upper fixture catch to remove the box, then remove it from the box fixture. Photo Connect for ground Fixture Electrical box. REMOVING THE NOZZLE ASSEMBLY (with VANE and VANE MOTOR) AND DRAIN HOSE () Remove the panel and corner box. (Refer to procedure ) () Remove the electrical box covers. (Refer to procedure ) () Disconnect the vane motor connector (CN) on the indoor controller board. () Pull out the drain hose from the nozzle assembly, and remove nozzle assembly. (See Photo ) Photo (see the bottom) Nozzle assembly Vane motor Cable strap. REMOVING THE VANE MOTOR () Remove the nozzle assembly. (Refer to procedure ) () Remove screws of the vane motor unit cover, and pull out the vane motor unit. () Remove screws of the vane motor unit. () Remove the vane motor from the vane motor unit. () Disconnect the connector from the vane motor. Drain hose Photo Screws of the vane motor unit Screw of electrical box Screws of the vane motor unit cover
OPERATI PROCEDURE. REMOVING THE INDOOR FAN MOTOR AND THE LINE FLOW FAN () Remove the panel and the corner box. (Refer to procedure ) () Remove the electrical box (Refer to procedure ) and the nozzle assembly (Refer to procedure ). () Remove the water cut. (See Photo ) () Remove the screw fixing the line flow fan. (See Photo ) () Remove screws fixing the motor bed. (See Photo 7) () Remove the lead wire of pipe thermistor from the hook of motor bed. (See Photo 7) (7) Remove the screw fixing motor band. (See Photo 7) () Remove the motor bed together with fan motor and motor band. (9) Remove screws fixing the left side of the heat exchanger. (See Photo 9) () Lift the heat exchanger, and pull out the line flow fan to the lower-left. PHOTOS Photo 7 Screw of the motor band Lead wire of pipe thermistor Screws of the motor bed Photo 9 Photo Screw of the line flow fan Screws of the left side of the heat exchanger 7. REMOVING THE LIQUID PIPE THERMISTOR AND GAS PIPE THERMISTOR () Remove the panel and the corner box. (Refer to procedure ) () Remove the electrical box covers. (Refer to procedure ) () Remove the water cut. (See Photo ) () Remove the liquid pipe thermistor and gas pipe thermistors. () Disconnect the connector (CN) (CNG) on the indoor controller board. (TH and TH/CN, TH/CNG) Photo Gas pipe thermistor (TH) (TH) LEV Connect for ground Liquid pipe thermistor (TH) 9
OPERATI PROCEDURE. REMOVING THE HEAT EXCHANGER AND LEV Photo PHOTOS () Remove the panel and the corner box. (Refer to procedure ) () Remove the electrical box (Refer to procedure ) and the nozzle assembly (Refer to procedure ). () Remove the water cut. () Remove the pipe thermistors (Refer to 7.). () Disconnect the connector (CN) on the indoor controller board and the connector for ground wire. () Remove screws fixing the left side of the heat exchanger. (See Photo 9) (7) Remove the heat exchanger with LEV. Heat exchanger Water cut LEV Photo Heat exchanger LEV Connect for ground 9. REMOVING THE ROOM TEMPERATURE THERMISTOR Photo () Remove the panel and corner box. (Refer to procedure ) () Remove the electrical box covers. (Refer to procedure ) () Remove the room temperature thermistor. () Disconnect the connector (CN) on the indoor controller board. Indoor controller board Room temp. thermistor (TH) HEAD ICE : TOKYO BLDG., -7-, MARUNOUCHI, CHIYODA-KU TOKYO -, JAPAN Copyright MITSUBISHI ELECTRIC CORPORATI Distributed in Dec. No. OCH7 REVISED EDITI-B Distributed in May No. OCH7 REVISED EDITI-A Distributed in Nov. No. OCH7 PDF Made in Japan New publication, effective Dec. Specifications are subject to change without notice.