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TECHNICAL & SERVICE MANUAL

CONTENTS

1. PART NAMES AND FUNCTIONS .......... 2

2. SPECIFICATION ..................................... 4

3. OUTLINES AND DIMENSIONS .............. 6

4. WIRING DIAGRAM ................................. 7

5. REFRIGERANT SYSTEM DIAGRAM ..........8

6. MICROPROCESSOR CONTROL ........... 9

7. TROUBLESHOOTING .......................... 14

8. DISASSEMBLY PROCEDURE ............. 21

Indoor unit
[Model names]

[Service Ref.]

PKFY-P12NHMU-E

PKFY-P15NHMU-E

PKFY-P18NHMU-E

No. OCH460

INDOOR UNIT

SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS

R22

R410A

Note:

•

This manual describes

only service data of the
indoor units.

•

RoHS compliant products

have <G> mark on the
spec name plate.

April 2009

PARTS CATALOG (OCB460)

Содержание PKFY-P12NHMU-E

Страница 1: ...BLESHOOTING 14 8 DISASSEMBLY PROCEDURE 21 Indoor unit Model names Service Ref PKFY P12NHMU E PKFY P12NHMU E PKFY P15NHMU E PKFY P15NHMU E PKFY P18NHMU E PKFY P18NHMU E No OCH460 INDOOR UNIT SPLIT TYPE HEAT PUMP AIR CONDITIONERS R22 R410A Note This manual describes only service data of the indoor units RoHS compliant products have G mark on the spec name plate April 2009 PARTS CATALOG OCB460 ...

Страница 2: ...om temperature CLOCK display Displays the current time display Displays the order of timer operation display Displays whether timer is on or off In case the outdoor unit is cool only type the heating and auto mode are not available Buttons used to set the hour and minute of the current time and timer settings h and min buttons display display FAN SPEED display indicates which fan speed has been se...

Страница 3: ...m temperature The room temperature display range is 46 102 F The display blinks if the temperature is less than 46 F or 102 F 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 Fan Speed indicator Shows the selected fan speed Ventilation indicator Appears when the unit is running in Ventilat...

Страница 4: ...pper tube DC motor Direct drive Polyethylene sheet PP honeycomb Fuse LEV R410A R22 CITY MULTI PKFY P12NHMU E Plastic MUNSELL 1 0Y 9 2 0 2 3 5 12 000 0 03 0 30 4 0 13 500 0 03 0 30 295 898 249 11 5 8 35 3 8 9 13 16 13 29 Line flow fan 1 0 0 0 030 PKFY P15NHMU E 9 10 5 12 150 175 200 320 370 425 36 41 45 I D 16mm 5 8 ø6 35 ø1 4 ø6 35 ø1 4 ø12 7 ø1 2 ø12 7 ø1 2 Flare Flare Flare Flare ø6 35 ø1 4 ø6 3...

Страница 5: ...Y P12 15NHMU E External static pressure 0Pa Power source 208 230V 60Hz Measured in anechoic room OCTAVE BAND PRESSURE LEVEL dB 0dB 20MPa 3 3 ft 1m Measurement location PKFY P12NHMU E PKFY P15NHMU E PKFY P18NHMU E 34 38 42 36 41 45 Sound level dB A Sound level at anechoic room Low Middle High Service Ref 34 38 42 Approximate minimum audible limit on continuous noise High speed Low speed 3 3 ft 1m O...

Страница 6: ... 2 140 4 1 2 115 6 13 16 174 8 3 8 213 9 5 16 238 10 15 16 278 3 15 1 2 394 11 1 16 281 17 5 8 449 0 Emergency operation switch cooling heating Terminal block for MA remote controller Terminal block for transmission Front side Grille open Terminal block for power supply 17 15 16 457 Gas pipe 21 3 16 539 Liquid pipe 6 5 8 169 6 3 16 158 24 610 Drain hose 7 3 16 184 Required space Indoor unit Air in...

Страница 7: ...FOR HEATING ORANGE RECEIVING UNIT ADDRESS SETTING 10ths DIGIT SW14 BRANCH No SWITCH LED1 LED2 RU SYMBOL NAME TH21 THERMISTOR ROOM TEMP DETECTION 32 F 15k 77 F 5 4kΩ PIPE TEMP DETECTION LIQUID 32 F 15k 77 F 5 4kΩ PIPE TEMP DETECTION GAS1 32 F 15k 77 F 5 4kΩ TH22 TH23 PIPE TEMP DETECTION GAS2 32 F 15k 77 F 5 4kΩ TH24 NOTES 1 At servicing for outdoor unit always follow the wiring diagram of outdoor u...

Страница 8: ...h Heat exchanger Room temparature thermistor TH21 Gas pipe thermistor TH23 Liquid pipe thermistor TH22 Linear expansion valve Gas pipe Liquid pipe Flare connection Gas pipe Liquid pipe PKFY P12 15 18NHMU E 12 7 1 2 6 35 1 4 Item Service Ref Unit mm inch Gas pipe thermistor TH24 PKFY P12 15 18NHMU E ...

Страница 9: ...nti freezing control starts and the thermo OFF Released condition The timer which prevents reactivating is set for 3 minutes and anti freezing control is cancelled when any one of the following conditions is satisfied Liquid pipe temp TH22 turns 50 F or above The condition of the thermo OFF has become complete by thermoregulating etc The operation modes became mode other than COOL The operation st...

Страница 10: ...min Less than 64 F Over 64 F ON OFF T1 83 F 83 F T1 79 F 79 F T1 75 F 75 F T1 Unconditional 9 3 7 3 5 3 3 3 10 3 Dry thermo OFF 2 Fan Note Remote controller setting is not acceptable Dry thermo Fan speed notch Excluding the following Room temp 64 F ON OFF Low Low Stop 3 Vane up down vane change Same control as COOL operation PAR 21MAA ON OFF FILTER CHECK OPERATION CLEAR TEST TEMP MENU BACK DAY MON...

Страница 11: ...COOL operation but with no restriction on the vane s downward blow setting Same control as COOL operation PAR 21MAA ON OFF FILTER CHECK OPERATION CLEAR TEST TEMP MENU BACK DAY MONITOR SET CLOCK ON OFF û Fû C û Fû C ERROR CODE AFTER TIMER TIME SUN MON TUE WED THU FRI SAT ON OFF Hr AFTER FILTER FUNCTION ONLY1Hr WEEKLY SIMPLE AUTO OFF 6 3 FAN OPERATION How to operate Press POWER ON OFF button Press t...

Страница 12: ...xiliary heater 1 STAND BY will be displayed during the hot adjust mode To be continued on the next page By the remote controller setting switch of 3 speeds Auto When Auto is set fan speed is changed depending on the value of Desired temperature Room temperature Give priority to under mentioned controlled mode 2 1 Hot adjust mode 2 2 Residual heat exclusion mode 2 3 Thermo OFF mode When the compres...

Страница 13: ...l details HEAT mode for room temperature Desired temperature COOL mode for room temperature Desired temperature 1 HEAT mode COOL mode Room temperature Desired temperature 3 F or 3 min has passed 2 COOL mode HEAT mode Room temperature Desired temperature 3 F or 3 min has passed 1 Initial value of operation mode Remarks 2 Mode change Same control as cool operation 3 COOL mode Same control as heat op...

Страница 14: ...5 6 LEV White Yellow Orange Blue Red Brown CN60 Refer to 7 1 3 7 1 2 Liner expansion valve 7 1 1 Thermistor 4 Φ4 3 6 5 Φ3 2 Φ2 1 Φ1 Φ4 Φ3 Φ2 Φ1 Controller board Drive circuit Connector CN60 DC12V Brown Red Blue Orange Yellow White M 4 6 2 3 5 1 Blue Brown Yellow Orange Red White Linear expansion valve Thermistor characteristic graph Room temperature thermistor TH21 Liquid pipe temperature thermist...

Страница 15: ...eck the color of lead wire and missing terminal of the con nector Exchange the linear expan sion valve Exchange the linear expan sion valve If large amount of refriger ant is leaked exchange the linear expansion valve Disconnect the connector at the controller board then check the continuity Measure the resistance between each coil white red yellow brown orange red blue brown using a tester It is ...

Страница 16: ... and 3 of the fan connector VDC DC294 325V TEST POINT VCC between 4 and 3 of the fan connector VCC DC15V Wiring recovery Replace indoor controller board Replace indoor controller board Replace the fan motor Replace the fan motor Indoor controller board fuse check Replace indoor controller board Replace the fan motor Is the voltage normal Is there contact failure No Yes No No Is the fuse normal Rep...

Страница 17: ...ON OFF 1 2 3 4 5 6 7 8 ON OFF 1 2 3 4 5 6 7 8 9 10 Address board Initial setting Indoor controller board Initial setting SW3 Function selection Under suspension SW2 Capacity code Before power supply ON switch SW1 Mode Effective timing Under suspension selection Switch Pole Function Operation by switch Remarks Built in remote controller Indoor unit Changing the opening of linear expansion valve dur...

Страница 18: ... 1 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 3 digits appears steadily lit 2 Press the MINUTE button twice The pair number appears flashing 3 Press the temperature buttons to select the pair number to set 4 Press the SET button using a pointed implement The set pair number is display...

Страница 19: ... wire J41 J42 Pair No setting for wireless remote controller LDSWE A Connect to the wireless remote controller board S B CN2M Connect to the terminal block TB5 M NET transmission connecting wire 24 30VDC non polar Power supply from outdoor unit SW3 Function setting CN2G Pipe temperature thermistor Gas2 TH24 CN24 External heater CN51 Centrally control led CN60 Liner expansion valve LEV output 12VDC...

Страница 20: ...3 3 Address board PKFY P12NHMU E PKFY P15NHMU E PKFY P18NHMU E SW1 Function setting SW12 Address setting 10ths DIGIT SW11 Address setting 1s DIGIT 7 3 2 Wireless remote controller board PKFY P12NHMU E PKFY P15NHMU E PKFY P18NHMU E LD101 Connect to the indoor controller board I B SW14 Branch No ...

Страница 21: ...de of indoor unit and remove the hook PKFY P12NHMU E PKFY P15NHMU E PKFY P18NHMU E Be careful when removing heavy parts Figure 1 2 REMOVING THE FRONT PANEL 1 Press and unlock the knobs on both sides of the front panel and lift the front panel until it is level Pull the hinges forward to remove the front panel See Photo 2 2 Move the horizontal vanes in a downward direction 3 Remove the screw caps o...

Страница 22: ...re Photo 7 Screw Electrical box Screw side cover Switch board cover Nozzle assembly Screw top cover Room temp thermistor TH21 Fixture right Terminal block TB5 Terminal block TB15 Room temp thermistor TH21 3 REMOVING THE INDOOR CONTROLLER BOARD AND WIRELESS CONTROLLER BOARD 1 Remove the front panel Refer to 2 2 Remove the room temp thermistor TH1 see Photo 3 3 Remove the electrical box covers screw...

Страница 23: ...fan to the lower left Photo 9 Photo 10 7 REMOVING THE VANE MOTOR 1 Remove the nozzle assembly Refer to 5 2 Remove the screws of the vane motor unit and pull out the vane motor unit 3 Remove the screws of the vane motor unit cover 4 Remove the vane motor from the vane motor unit 5 Disconnect the connector from the vane motor 8 REMOVING THE LIQUID PIPE THERMISTOR AND GAS PIPE THERMISTOR 1 Remove the...

Страница 24: ...hermistor 4 Disconnect the connector CN20 on the indoor controller board NOTE When room temp thermistor is replaced be sure to use service parts No R01 N20 202 Photo 14 Photo 16 Electrical box cover top Electrical box cover side Screw side cover Screw top cover Switch board cover Holder of wireless controller board Nozzle assembly Water cover Copyright 2009 MITSUBISHI ELECTRIC ENGINEERING CO LTD D...

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