background image

33

 

Wired

 

remote controller

°F°C

°F°C

ERROR CODE

AFTER

TIMER

TIME SUN MON TUE WED THU FRI SAT

ON
OFF

Hr
AFTER

FILTER

FUNCTION

ONLY1Hr.

WEEKLY

SIMPLE

AUTO OFF

PAR-21MAA

ON/OFF

FILTER

CHECK

OPERATION

CLEAR

TEST

TEMP.

MENU

BACK

DAY

MONITOR/SET

CLOCK

ON/OFF

Display Section

For purposes of this explanation,
all parts of the display are shown
as lit. During actual operation, only
the relevant items will be lit.

Identifies the current operation

 Shows the operating mode, etc.
*Multilanguage display is available.

“Centrally Controlled” indicator

Indicates that operation from the 
remote controller has been prohib-
ited by a master controller.

“Timer is Off” indicator

Indicates that the timer is off.

Temperature Setting

Shows the target temperature.

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

Displayed when the remote controller
sensor is used.

“Locked” indicator

Indicates that remote controller but-
tons have been locked.

“Clean The Filter” indicator

To be displayed on when it is time to 
clean the filter.

Timer indicators

The indicator comes on if the corre-
sponding timer is set.

Up/Down Air Direction indica-
tor

The indicator     shows the direc-
tion of the outcoming airflow.

“One Hour Only” indicator

Room Temperature display

Shows the room 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
Ventilation mode.

Operation Section

Temperature setting buttons

Down

Up

Timer Menu button
(Monitor/Set button)

Mode button (Return button)

Set Time buttons

Back

Ahead

Timer On/Off button
(Set Day button)

Opening the
lid

ON/OFF button

Fan Speed button

Filter      button
(<Enter> button)

Test Run button

Check button (Clear button)

Airflow Up/Down button

Louver button
(      Operation button)

To return operation
number

Ventilation button
(     Operation button)

To go to next operation
number

Note:

“PLEASE WAIT” message
This message is displayed for approximately 3 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.

Built-in temperature sensor

Displayed 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.

Summary of Contents for PKFY-P12NHMU-E

Page 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 ...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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 ...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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 ...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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 ...

Page 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...

Page 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...

Page 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...

Page 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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