Mitsubishi Electric Mr.SLIM PKA-A12HA4 Service Manual Download Page 35 | Manualshive

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Summary of Contents for Mr.SLIM PKA-A12HA4

Page 1: ...NAMES AND FUNCTIONS 4 4 SPECIFICATIONS 7 5 NOISE CRITERION CURVES 8 6 OUTLINES AND DIMENSIONS 9 7 WIRING DIAGRAM 10 8 REFRIGERANT SYSTEM DIAGRAM 11 9 TROUBLESHOOTING 12 10 SPECIAL FUNCTION 26 11 DISASSEMBLY PROCEDURE 29 Indoor unit Model names Service Ref PARTS CATALOG OCB483 No OCH483 November 2010 INDOOR UNIT PKA A12HA4 PKA A12HA4 PKA A18HA4 PKA A18HA4 ON OFF TEMP COOL DRY AUTO FAN HEAT WIRED RE...

Page 2: ...ce Manual No PUZ A18 24 36NHA4 PUZ A18 24 36NHA4 BS PUY A12 18 24 36NHA4 PUY A12 18 24 36NHA4 BS OCH481 OCB481 Radio frequency interface Wired remote controller IR wireless remote controller ON OFF TEMP COOL DRY AUTO FAN HEAT RF thermostat Remote controller Optional parts ...

Page 3: ...h Gas leak detector Charge hose Tools for R410A Contamination inside refrigerant piping can cause deterio ration of refrigerant oil etc If dirt dust or moisture enters into refrigerant cycle that can cause deterioration of refrigerant oil or malfunction of com pressor If large amount of mineral oil enters that can cause deterio ration of refrigerant oil etc The refrigerant oil applied to flare and...

Page 4: ...se the existing fitting specifications UNF1 2 Use high tension side pressure of 5 3MPa G or over 2 Charge hose Only for R410A Use pressure performance of 5 09MPa G or over 3 Electronic scale 4 Gas leak detector Use the detector for R134a R407C or R410A 5 Adaptor for reverse flow check Attach on vacuum pump 6 Refrigerant charge base 7 Refrigerant cylinder Only for R410A Top of cylinder Pink Cylinde...

Page 5: ... 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 Vent...

Page 6: ...hen in timer operation or when setting timer button Sets any desired room temperature CLOCK display Displays the current time display Displays the order of timer operation display Displays whether timer is on or off Buttons used to set the hour and minute of the current time and timer settings h and min buttons Temperature setting display Indicates the desired temperature setting which is set disp...

Page 7: ...11 290 335 380 0 direct blow Remote controller built in 36 40 43 16 5 8 898 35 3 8 249 9 13 16 295 11 5 8 13 29 1 phase 60Hz 208 230V 15 1 Plate fin coil 0 direct blow Remote controller built in A A kW F L A min CFM Pa mmAq dB mm in mm in mm in mm in kg lbs Service Ref Power supply phase cycle voltage Max Fuse Size Min Circuit Ampacity External finish Heat exchanger Fan Fan drive No Fan motor outp...

Page 8: ...0 2000 4000 8000 APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE NC 60 NC 50 NC 40 NC 30 NC 20 NC 70 OCTAVE BAND SOUND PRESSURE LEVEL dB 0dB 0 0002 μbar BAND CENTER FREQUENCIES Hz PKA A12HA4 PKA A18HA4 High NOTCH Low 43 SPL dB 36 LINE UNIT WALL 3 3ft 3 3ft MICROPHONE ...

Page 9: ...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 power supply option Front side Grille open Terminal block for indoor outdoor connecting line 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 250mm 9 13 16inch or ...

Page 10: ...PKA A12HA4 PKA A18HA4 ON OFF 1 2 3 4 5 ON OFF 1 2 3 4 5 W B RFI CNRU WHT LD101 B REC1 LED1 LED2 6 2 5 RU Symbol Name Symbol Name I B Indoor controller board FUSE FUSE T3 15AL250V RFI Radio frequency interface for RF thermostat CN2L Connector LOSSNAY CN30 Connector LLC CN105 Connector Radio frequency interface CN152 Connector Back up heating CN90 Connector Remote operation adapter Connector Emergen...

Page 11: ... with strainer 50 50 Thermistor TH5 Cond Eva temperature Thermistor TH1 Room temperature Refrigerant flow in cooling Refrigerant flow in heating Strainer 50 Strainer 50 Heat exchanger Refrigerant GAS pipe connection Flare Refrigerant LIQUID pipe connection Flare PKA A12HA4 PKA A18HA4 ...

Page 12: ... to 9 4 Troubleshooting by inferior phenomena The trouble is not reoccurring Logged Not logged Consider the temporary defects such as the work of protection devices in the refrigerant circuit including compressor poor connection of wiring noise and etc Re check the symptom and check the installation environment refrigerant amount weather when the trouble occurred matters related to wiring and etc ...

Page 13: ...ress of the indoor unit for the self diagnosis Note Set refrigerant address using the outdoor unit s DIP switch SW1 For more information see the outdoor unit installation manual If an air conditioner error occurs the indoor unit s sensor emits an intermit tent buzzer sound the operation lamp blinks and the error code is output It takes 3 seconds at most for error code to appear The check mode is c...

Page 14: ...er of times IR wireless remote controller Wired remote controller Beeper sounds OPERATION INDICATOR lamp blinks Check code Number of times IR wireless remote controller Wired remote controller 1 P1 Intake sensor error P9 Pipe TH5 sensor error 2 P2 Pipe TH2 sensor error 3 E6 E7 Indoor outdoor unit communication error 4 P4 Float switch connector CN4F open 5 P5 PA Drain pump error Forced compressor s...

Page 15: ...ected Reverse or open phase wiring for the outdoor unit s power terminal block L1 L2 GR Incorrect wiring between indoor and outdoor units incorrect polarity of S1 S2 S3 Remote controller wire short Note Operation is not possible for about 30 seconds after cancellation of function selection Correct operation For description of each LED LED1 2 3 provided on the indoor controller refer to the followi...

Page 16: ... P1 above Check contact failure of connector CN44 on the indoor controller board Refer to 9 7 Turn the power on and check restart after inserting connector again Check pipe liquid temperature with remote controller in test run mode If pipe liquid temperature is extremely low in cooling mode or high in heating mode refrigerant circuit may have defect Check pipe liquid temperature with remote contro...

Page 17: ...c tive Defective outdoor fan control Overcharge of refrigerant Defective refrigerant circuit clogs Bypass circuit of outdoor unit is defective Cooling or drying mode Check clogs of the filter Remove blockage Refer to 9 6 Check outdoor fan motor Check operating condition of refrigerant circuit Heating mode Check clogs of the filter Remove blockage Refer to 9 6 Check outdoor fan motor Check operatin...

Page 18: ...hen the above mentioned problem of are not applied Diagnose remote controllers a When RC OK is displayed remote con trollers have no problem Turn the power off and on again to check If abnormality generates again replace indoor controller board b When RC NG is displayed replace remote controller c When RC E3 or ERC 00 06 is dis played noise may be causing abnormality If the unit is not normal afte...

Page 19: ...normal point and detection method Cause Countermeasure Fb Indoor controller board Abnormal if data cannot be read normally from the nonvolatile memory of the indoor controller board Defective indoor controller board Replace indoor controller board E1 or E2 Remote controller control board Abnormal if data cannot be read nor mally from the nonvolatile memory of the remote controller control board Er...

Page 20: ...ctor Normal operation Each connector on vane motor side is disconnected or set ting the fixed vanes by wired remote controller Phenomena Cause Countermeasure 2 Receiver for IR wireless remote controller Weak batteries of IR wireless remote controller Contact failure of connector CNB on IR wireless remote controller board Insert failure Contact failure of connector CN90 on indoor con troller board ...

Page 21: ...indoor unit operates as follows 1 Indoor fan is running at high speed Note on the IR wireless remote control when the remote control does not function it is possible to activate emergency operation by using the indoor unit emergency operation switch However if the indoor unit microprocessor has failed it is nesessary to proceed with points 2 and 3 below as in the case of the wired remote control 2...

Page 22: ...xt page for a detail Room temperature thermistor TH1 Liquid pipe thermistor TH2 Condenser evaporator temperature thermistor TH5 Normal 4 3k 9 6k Abnormal Open or short 9 6 1 Thermistor Thermistor Characteristic graph Room temperature thermistor TH1 Pipe temperature thermistor liquid TH2 Condenser evaporator temperature thermistor TH5 Thermistor R0 15k 3 Fixed number of B 3480 2 t Rt 15exp 3480 0 1...

Page 23: ... connector VDC DC294 325V TEST POINT VCC between 4 and 3 of the fan connector VCC DC15V Wiring recovery Replace the indoor controller board Replace the fan motor Replace the indoor controller board Replace the fan motor Is the voltage normal Is there contact failure No Yes No Check the operation of fan END Yes OK Check the operation END OK Check method of DC fan motor fan motor indoor controller c...

Page 24: ...0V SWE Emergency operation connector SW1 Model selection SW2 Capacity setting CN151 Connect to the vane motor MV Jumper wire J41 J42 Pair No setting for IR wireless remote controller CN01 Connect to the Terminal block TB4 1 3 208 230VAC LED1 Power supply I B LED2 Power supply R B LED3 Transmission Indoor outdodr CN3C Transmission Indoor outdodr DC 0 24V CN30 Connector LLC CN22 Connect to the termi...

Page 25: ...mber settings are supported The pair number settings of the wireless remote controller and indoor control PCB J41 J42 are given in the table on the left in the table indicates the jumper wire is dis connected Jumper wire Short Open For product Spare parts Indoor controller board type JP3 With JP3 Without JP3 MODELS SETTING PKA A HA4 MODELS SETTING A12 A18 ON OFF 1 2 3 4 5 ON OFF 1 2 3 4 5 ON OFF 1...

Page 26: ...n Outline of functions Main and sub units operate alternately according to the interval of rotation setting w Main and sub unit should be set by refrigerant address Outdoor Dip switch setting Refrigerant address 00 Main unit Refrigerant address 01 Sub unit When error occurs to one unit another unit will start operation Back up function System constraint This function is available only by the group...

Page 27: ...back up function No 5 314 Rotation ON Alternating interval 3day and back up function No 6 315 Rotation ON Alternating interval 5day and back up function No 7 316 Rotation ON Alternating interval 7day and back up function No 8 317 Rotation ON Alternating interval 14day and back up function No 9 318 Rotation ON Alternating interval 28day and back up function Setting No Request code Setting contents ...

Page 28: ...the button to perform function setting If above setting operations are done correctly Request code number will appear in data display area Example When the 311 of Request code number is set 311 appears on the screen Refererence You can check current request code number setting by setting the request code number 310 or 320 and pressing the button Example When the current setting is Setting No 2 Req...

Page 29: ...wer side of indoor unit and remove the hook 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 of the panel Remove the screws See Photo 1 4 Hold the lower part of both ends...

Page 30: ...RD AND IR WIRELESS CONTROLLER BOARD 1 Remove the front panel Refer to step 2 2 Remove the room temp thermistor TH1 see Photo 3 3 Remove the electrical box covers screw 4 12 See Photo 3 4 Disconnect the connectors on the indoor controller board 5 Remove the switch board cover 6 Pull out the indoor controller board toward you then disconnect the rest of connectors Remove the indoor controller board ...

Page 31: ...otor band Remove the motor band Pull out the indoor fan motor 7 Remove the screws fixing the left side of the heat exchanger See Photo 10 8 Lift the heat exchanger and pull out the line flow fan to the lower left Photo 8 Photo 9 7 REMOVING THE VANE MOTOR 1 Remove the nozzle assembly Refer to step 5 2 Remove the screws of the vane motor unit and pull out the vane motor unit 3 Remove the screws of t...

Page 32: ...sconnect the connector CN60 on the indoor controller board and the connector for ground wire See Photo 5 6 Remove the screws fixing the left side of the heat exchanger See Photo 9 7 Remove the heat exchanger 10 REMOVING THE ROOM TEMPERATURE THERMISTOR 1 Remove the front panel Refer to step 2 2 Remove the electrical box cover 3 Remove the room temperature thermistor 4 Disconnect the connector CN20 ...

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Page 36: ...MARUNOUCHI CHIYODA KU TOKYO 100 8310 JAPAN CCopyright 2010 MITSUBISHI ELECTRIC ENGINEERING CO LTD Distributed in Nov 2010 No OCH483 Made in Japan New publication effective Nov 2010 Specifications subject to change without notice TM ...

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