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Manuel d’utilisation Mitsubishi Electronics PKA-A36KA4.TH

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  • Mitsubishi Electronics PKA-A36KA4.TH - page 1

    SER VICE MANUAL SPLIT -TYPE, HEA T PUMP AIR CONDITIONERS SPLIT -TYPE, AIR CONDITIONERS Note: • This manual describes only service data of the indoor units. • RoHS compliant products have <G> mark on the spec name plate. CONTENTS 1. REFERENCE MANUAL ................................... 2 2. SAFETY PRECAUTION ................................ ...

  • Mitsubishi Electronics PKA-A36KA4.TH - page 2

    2 1 REFERENCE MANUAL OUTDOOR UNIT SERVICE MANUAL Service Ref. Service Manual No. PUZ-A24/30/36NHA4 PUZ-A24/30/36NHA4-BS PUY -A24/30/36NHA4 PUY -A24/30/36NHA4-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) ...

  • Mitsubishi Electronics PKA-A36KA4.TH - page 3

    3 SAFETY PRECAUTION 2 Cautions for units utilising refrigerant R410A 2-2. CAUTIONS RELA TED TO NEW REFRIGERANT Use new refrigerant pipes. Store the piping to be used indoors during installation, and keep both ends of the piping sealed until just before brazing. (Leave elbow joints, etc. in their packaging.) Charge refrigerant from liquid phase of g ...

  • Mitsubishi Electronics PKA-A36KA4.TH - page 4

    4 Gravimeter Unit [3] Service tools Use the below service tools as exclusive tools for R410A refrigerant. 3 P ART NAMES AND FUNCTIONS Indoor unit Emergency operation switch Front grille Air inlet Filter Air outlet Louver Vane No. T ool name Specifications 1 Gauge manifold · Only for R410A · Use the existing fitting specifications . (UNF1/2) · Us ...

  • Mitsubishi Electronics PKA-A36KA4.TH - page 5

    5 Wired remote controller (Option) °F°C °F°C ERROR CODE AFTER TIMER TIME SUN MON TUE WED THU FRI SA T ON OFF Hr AFTER FIL TER FUNCTION ONL Y1Hr. WEEKL Y SIMPLE AUT O OFF P AR-21MAA ON/OFF FIL TER CHECK OPERA TION CLEAR TEST TEMP . MENU BACK D A Y MONITOR/SET CLOCK ON/OFF • • Display Section For purposes of this explanation, all parts of the ...

  • Mitsubishi Electronics PKA-A36KA4.TH - page 6

    6 IR wireless remote controller (Option) ON/OFF TEMP FA N VA N E TEST RUN AUTO ST OP AUTO ST ART h min LOUVER MODE CHECK RESET SET CLOCK MODEL SELECT NOT A V AILABLE SWING CHECK FA N TEST RUN °F °C AMPM STOP ST ART AMPM COOL DRY AUTO FA N HEA T V ANE CONTROL button Changes the air flow direction. CLOCK button RESET button SET button ON/OFF button ...

  • Mitsubishi Electronics PKA-A36KA4.TH - page 7

    7 SPECIFICA TIONS 4 A A kW F.L.A m 3 /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 output Fan motor Airflow(Low-Middle-High) External static pressure Operation control & Thermostat No ...

  • Mitsubishi Electronics PKA-A36KA4.TH - page 8

    8 5 NOISE CRITERION CUR VES UNIT WA L L 3.3ft 3.3ft MICROPHONE 90 80 70 60 50 40 30 20 10 63 125 250 500 1000 2000 4000 8000 NC-60 NC-50 NC-40 NC-30 NC-20 NC-70 OCT A VE BAND SOUND PRESSURE LEVEL, dB (0dB= 0.0002 μ bar ) BAND CENTER FREQUENCIES, Hz APPROXIMA TE THRESHOLD OF HEARING FOR CONTINUOUS NOISE High NOTCH Low 49 SPL(dB) 43 LINE 90 80 70 60 ...

  • Mitsubishi Electronics PKA-A36KA4.TH - page 9

    9 OUTLINES AND DIMENSIONS 6 Front side 46-1/16(1 170) 9-1/2(241) 33-21/32(855) 2-29/32(74) 14-3/8(365) Emergency operation switch (cooling/heating) T erminal block for Outdoor unit T erminal block for MA-remote controller Front side(Grille open) T erminal block for power supply (option) Filter hook 6-1/16(154) 4-27/32(123) 18-31/32(482)Liquid pipe ...

  • Mitsubishi Electronics PKA-A36KA4.TH - page 10

    10 WIRING DIAGRAM 7 PKA-A24KA4.TH PKA-A30KA4.TH PKA-A36KA4.TH Symbol Name Symbol Name I.B Indoor controller board FUSE FUSE (T3.15AL250V) CN2L Connector (LOSSNAY) CN30 Connector (LLC) CN105 Connector (Radio frequency interface) CN152 Connector (Back-up heating) CN90 Connector (Remote operation adapter) Connector (Emergency operation) CN32 Connector ...

  • Mitsubishi Electronics PKA-A36KA4.TH - page 11

    11 REFRIGERANT SYSTEM DIAGRAM 8 Thermistor TH2 Pipe temperature(Liquid) Distributor with strainer (#50/#100) 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 co ...

  • Mitsubishi Electronics PKA-A36KA4.TH - page 12

    12 TROUBLESHOOTING 9 <Error code display by self-diagnosis and actions to be taken for service (summary)> Present and past error codes are logged and displayed on the wired remote controller or controller board of outdoor unit. Actions to be taken for service and the trouble reoccurrence at field are summarized in the table below . Check the ...

  • Mitsubishi Electronics PKA-A36KA4.TH - page 13

    13 13 [Procedure] 1. Press the CHECK button twice. 2. Press the temperature buttons. 3. Point the remote controller at the sensor on the indoor unit and press the HOUR button. 4. Point the remote controller at the sensor on the indoor unit and press the ON/OFF button. ON/OFF TEMP FA N VA N E MODE CHECK LOUVER TEST RUN AUTO STOP AUTO ST ART h min RE ...

  • Mitsubishi Electronics PKA-A36KA4.TH - page 14

    14 [Output pattern A] Errors detected by indoor unit [Output pattern B] E9 *1 If the beeper does not sound again after the initial 2 beeps to confirm the self-check star t signal w as received and the OPERA TION INDICA T OR lamp does not come on, there are no error records. *2 If the beeper sounds 3 times continuously “beep , beep , beep (0.4 + 0 ...

  • Mitsubishi Electronics PKA-A36KA4.TH - page 15

    15 • If the unit cannot be operated properly after the test run, refer to the f ollowing table to find out the cause . Symptom Cause Wired remote controller LED 1, 2 (PCB in outdoor unit) On the IR wireless remote controller with condition abov e, f ollowing phenomena take place . • No signals from the remote controller can be received. • OPE ...

  • Mitsubishi Electronics PKA-A36KA4.TH - page 16

    16 9-3. SELF-DIAGNOSIS ACTION T ABLE Note: Refer to the manual of outdoor unit for the details of display su ch as F , U , a nd ot he r E . Error Code Abnormal point and detection method Cause Countermeasure P1 Room temperature thermistor (TH1) The unit is in 3-minute resume prevention mode if short/open of thermistor is detected. Abnormal if the u ...

  • Mitsubishi Electronics PKA-A36KA4.TH - page 17

    17 Error Code Abnormal point and detection method Cause Countermeasure P6 Freezing/overheating protection is operating Freezing protection (Cooling mode) The unit is in 6-minute resume prevention mode if pipe <liquid or condenser/evapo- rator> temperature stays under the compressor started. Abnormal if it again within 16 minutes after 6-minut ...

  • Mitsubishi Electronics PKA-A36KA4.TH - page 18

    18 Error Code Abnormal point and detection method Cause Countermeasure P9 Pipe temperature thermistor/ Condenser-Evaporator (TH5) The unit is in 3-minute resume protec- tion mode if short/open of thermistor is detected. Abnormal if the unit does not get back to normal within 3 minutes. (The unit returns to normal operation, if it has been reset nor ...

  • Mitsubishi Electronics PKA-A36KA4.TH - page 19

    19 E6 Contact failure, short circuit or , miswiring (converse wiring) of indoor/outdoor unit connecting wire Defective transmitting receiving circuit of outdoor controller circuit board Defective transmitting receiving circuit of indoor controller board Noise has entered into indoor/ outdoor unit connecting wire. Check LED display on the outdoor co ...

  • Mitsubishi Electronics PKA-A36KA4.TH - page 20

    20 Note: Refer to the manual of outdoor unit for the detail of remote controller . (1)Upward/downward vane performance failure The vane is not downward during defrosting and heat preparation and when the thermostat is OFF in HEA T mode. (Working of COOL protection function) V ane motor does not rotate. • Defective vane motor • Breaking of wire ...

  • Mitsubishi Electronics PKA-A36KA4.TH - page 21

    21 9-5. EMERGENCY OPERA TION 9-5-1. When IR wireless remote controller fails or its battery is exhausted 9-5-2. When wired remote controller or indoor unit microprocessor fails When the remote controller cannot be used  DEFROST/ST AND BY lamp (ORANGE)  Operation lamp (GREEN)  Emergency operation switch (cooling/heating)  Receiver [Heat ...

  • Mitsubishi Electronics PKA-A36KA4.TH - page 22

    22 9-6. HOW TO CHECK THE P ARTS Parts name Check points V ane motor (MV) Measure the resistance between the terminals using a tester . (Coil temperature 68 " F ) Normal 250  ± 7% Abnormal  -  Brown-Red  -  Brown-Orange  -  Brown-Y ellow  -  Brown-Green Open or short Fan motor (MF)  Red  Y ellow  Brown Orang ...

  • Mitsubishi Electronics PKA-A36KA4.TH - page 23

    23 9-6-2. 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 : ...

  • Mitsubishi Electronics PKA-A36KA4.TH - page 24

    24 9-7. TEST POINT DIAGRAM Indoor controller board PKA-A24KA4.TH PKA-A30KA4.TH PKA-A36KA4.TH { CN44 Pipe temperature thermistor 1 - 2 : Liquid (TH2) 3 - 4 : Condenser/Evaporator (TH5) CN20 Room temp. thermistor (TH1) CN90 Connect to the remote operation adapter CNMF Connect to the fan motor (MF) 1 - 3 : DC294~325V 4 - 3 : DC15V 5 - 3 : DC0~6.5V 6 - ...

  • Mitsubishi Electronics PKA-A36KA4.TH - page 25

    25 SW1 Setting by the dip switch and jumper wire Functions Jumper wire Model settings Capacity settings Pair number setting with wireless remote controller Remarks SW2 J41 J42 Indoor controller board type setting JP3 0 1 2 3 ~ 9 Wireless remote controller setting Control PCB setting J41 J42 <Initial setting> Wireless remote controller: 0 Cont ...

  • Mitsubishi Electronics PKA-A36KA4.TH - page 26

    26 10 SPECIAL FUNCTION Note: • When the unit is restarted to operate after turning off the power or OFF operation, the unit which was operating will start oper- ation. • T o operate the main unit, refer to the 10-1-2. and set the request code No. which is not the same as the current one, and set again the former request code No. (2) 2nd stage c ...

  • Mitsubishi Electronics PKA-A36KA4.TH - page 27

    27 27 System constraint • This function is available only in cooling mode. Ex.) Set temp. by R/C = 20 : (68°F) Set point = 26 : (79°F) When request code number is “323”. 26 : 2nd unit Cut-in 4 degree C 22 : 2nd unit Cut-out 20 : 10-1-2. How to set rotation function (Back-up function, 2nd stage cut-in function) Y ou can set these functions b ...

  • Mitsubishi Electronics PKA-A36KA4.TH - page 28

    28 (2) Setting method of each function by wired remote controller B: Refrigerant address C: Data display area D: Request code display area TEST CHECK FIL TER    FIL TER  ON/OFF 1. Stop operation(  ). 2. Press the button (  ) for 3 seconds so that [Maintenance mode] appears on the screen (  ). After a while, [00] appear ...

  • Mitsubishi Electronics PKA-A36KA4.TH - page 29

    29 DISASSEMBL Y PROCEDURE 11 PKA-A24KA4.TH PKA-A30KA4.TH PKA-A36KA4.TH 1. REMOVING THE P ANEL (1) 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 1) (2) Remove 3 screw caps of the panel. Remove 5 screws. (See Photo 1) (3) Unfix 3 ...

  • Mitsubishi Electronics PKA-A36KA4.TH - page 30

    30 3. REMOVING THE ELECTRICAL BOX (1) Remove the panel and the corner box. (Refer to step 1) (2) Remove the front and side electrical box covers (each 1 screw). (3) Remove the indoor / outdoor connecting wire from termi- nal block (TB4). (4) Disconnect the connectors on the indoor controller board. (5) Disconnect the connector for ground wire. (6) ...

  • Mitsubishi Electronics PKA-A36KA4.TH - page 31

    31 6. REMOVING THE INDOOR F AN MOTOR AND THE LINE FLOW F AN (1) Remove the panel and the corner box. (Refer to step 1) (2) Remove the electrical box (Refer to step 2) and the nozzle assembly (Refer to step 3). (3) Remove the water cut. (See Photo 2) (4) Remove the screw fixing the line flow fan. (See Photo 8) (5) Remove 5 screws fixing the motor be ...

  • Mitsubishi Electronics PKA-A36KA4.TH - page 32

    8. REMOVING THE HEA T EXCHANGER (1) Remove the panel and the corner box. (Refer to step 1) (2) Remove the electrical box (Refer to step 3) and the nozzle assembly (Refer to step 4). (3) Remove the water cut. (4) Remove the pipe thermistors from each holder . (5) Disconnect the connector for ground wire. (6) Remove 3 screws fixing the left side of t ...

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