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Mitsubishi Electronics PLA-A36BA1 manual

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Table of contents for the manual

  • Page 1

    SER VICE MANUAL SPLIT -TYPE, HEA T PUMP AIR CONDITIONERS SPLIT -TYPE, AIR CONDITIONERS 3 3 2 2 3 CONTENTS 1 . TECHNICAL CHANGES .......................... 2 2 . REFERENCE MANUAL ........................... 2 3. SAFETY PRECAUTION ........................ 3 4. P ART NAMES AND FUNCTIONS ........ 5 5. SPECIFICA TIONS ................................. 8[...]

  • Page 2

    2 2 REFERENCE MANUAL Ser vice Ref . PUZ-A18/24/30/36/42NHA PUZ-A18/24/30/36/42NHA-BS PUY -A12/18/24/30/36/42NHA (1) PUY -A12/18/24/30/36/42NHA (1) -BS Ser vice Manual No . OC367 PUZ-HA36NHA OCH426 OCB426 2-1. OUTDOOR UNIT SERVICE MANUAL Series (Outdoor unit) PUZ-A·NHA(-BS) PUY -A·NHA(-BS) Data Book No . OCS04 2-2. TECHNICAL DA T A BOOK 1 TECHNICA[...]

  • Page 3

    3 SAFETY PRECAUTION 3 Cautions for units utilising refrigerant R410A 3-2. CAUTIONS RELA TED TO NEW REFRIGERANT Use new refrigerant pipes. Make sure that the inside and outside of refrige- rant piping is clean and it has no contamination such as sulfur hazar dous for use, oxides, dir t, shaving particles, etc. In addition, use pipes with specified t[...]

  • Page 4

    4 Gra vimeter Unit [3] Service tools Use the below service tools as exclusive tools for R410A refrigerant. No. T ool name Specifications  Gauge manifold ·Only for R410A ·Use the existing fitting specifications . (UNF1/2) ·Use high-tension side pressure of 5.3MPa·G or over .  Charge hose ·Only for R410A ·Use pressure performance of 5.09M[...]

  • Page 5

    5 4 P ART NAMES AND FUNCTIONS Drain pipe Filter V ane Gas pipe Liquid pipe Air outlet i-see sensor (option) Air intake (Intake grille)[...]

  • Page 6

    6 °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 display are shown as lit. During[...]

  • Page 7

    7 L Wireless  remote controller ON/OFF TEMP FA N V ANE 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 The[...]

  • Page 8

    8 Service Ref. P ower supply (phase , cycle, voltage) Max. Fuse Size Min. Circuit Ampacity External finish (Panel) Heat exchanger F an F an (drive) % No . F an motor output F an motor Airflow (Low-Medium2-Medium1-High) External static pressure Booster heater Operation control & Thermostat Noise lev el (Low-Medium2-Medium1-High) Field drain pipe[...]

  • Page 9

    9 UNIT : 840 (33-1/16) P ANEL : 950 (37-3/8) UNIT : 840 (33-1/16) P ANEL : 950 (37-3/8) UNIT : 298 (11-3/4) P ANEL : 35 (1-3/8) UNIT : 25 (55) P ANEL : 6 (13) PLA-A36BA, PLA-A36BA 1 Single phase,60Hz, 208/230V 15 2 Munsell 6.4Y 8.9/0.4 Plate fin coil T urbo fan (direct) % 1 0.12 1.00 Dry: 20-23-26-30(710-810-920-1060) Wet: 19-22-25-29(670-770-880-1[...]

  • Page 10

    10 6 NOISE CRITERION CUR VES PLA-A12B A PLA-A12B A 1 PLA-A18B A PLA-A18B A 1 NO TCH SPL(dB) LINE High 31 Medium1 29 Medium2 28 Low 27 NO TCH SPL(dB) LINE High 32 Medium1 31 Medium2 29 Low 28 90 80 70 60 50 40 30 20 10 63 125 250 500 1000 2000 4000 8000 APPRO XIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE NC-60 NC-50 NC-40 NC-30 NC-20 NC-70 OCT A [...]

  • Page 11

    11 PLA-A36B A PLA-A36B A 1 PLA-A42B A PLA-A42B A 1 NO TCH SPL(dB) LINE High 40 Medium1 37 Medium2 34 Low 32 NO TCH SPL(dB) LINE High 41 Medium1 39 Medium2 36 Low 34 90 80 70 60 50 40 30 20 10 63 125 250 500 1000 2000 4000 8000 APPRO XIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE NC-60 NC-50 NC-40 NC-30 NC-20 NC-70 BAND CENTER FREQUENCIES, Hz 90 8[...]

  • Page 12

    12 INDOOR UNIT PLA-A12BA PLA-A18BA PLA-A24BA PLA-A30BA PLA-A36BA PLA-A42BA PLA-A12BA 1 PLA-A18BA 1 PLA-A24BA 1 PLA-A30BA 1 PLA-A36BA 1 PLA-A42BA 1 7 OUTLINES AND DIMENSIONS Unit : inch(mm) 14-27/32 11-3/16 2-3/8 +5 0 (7.5) +35 -5 (160) (500) (950) Floor Min.94-1/2(2400) from floor Entire peripher y (36) (83) (83) (36) (500) (950) (597) (597) ( 158)[...]

  • Page 13

    13 8 WIRING DIAGRAM INDOOR UNIT PLA-A12BA PLA-A18BA PLA-A24BA PLA-A30BA PLA-A36BA PLA-A42BA <Table 2> SW2 (CAPACITY CODE) Service PLA-A30BA PLA-A36BA PLA-A42BA PLA-A12BA PLA-A18BA PLA-A24BA MODELS SW2 ON OFF 12345 Service MODELS ON OFF 12345 ON OFF 12345 ON OFF 12345 ON OFF 12345 ON OFF 12345 <Table 1> SW1 (MODEL SELECTION) Service SW1 [...]

  • Page 14

    14 INDOOR UNIT PLA-A12BA 1 PLA-A18BA 1 PLA-A24BA 1 PLA-A30BA 1 PLA-A36BA 1 PLA-A42BA 1 <T able 2>SW2(CAPACITY CODE) Service PLA-A30BA PLA-A36BA PLA-A42BA PLA-A12BA PLA-A18BA PLA-A24BA MODELS SW2 ON OFF 12345 Service MODELS ON OFF 12345 ON OFF 12345 ON OFF 12345 ON OFF 12345 ON OFF 12345 <T able 1>SW1(MODEL SELECTION) Service SW1 ON OFF [...]

  • Page 15

    15 Thermistor TH2 Pipe temperature (Liquid) Distributor with strainer (#50) Thermistor TH5 (Cond./ Eva. temperature) Thermistor TH1 (Room temperature) Refrigerant flow in cooling Refrigerant flow in heating Strainer (#50) Strainer (#50) Heat e xchanger Refrigerant GAS pipe connection (Flare) Refrigerant LIQUID pipe connection (Flare) 9 REFRIGERANT [...]

  • Page 16

    16 10 TROUBLESHOOTING Unit conditions at ser vice Error code Actions to be taken f or ser vice (summar y) The trouble is reoccurring. Displa yed Not displa yed Judge what is wrong and tak e a corrective action according to “SELF-DIAGNOSIS A CTION T ABLE” (10-3). Identify the cause of the trouble and tak e a corrective action according to “TRO[...]

  • Page 17

    17 [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 V ANE MODE CHECK LOUVER TEST R UN A UTO ST OP A UTO ST ART h min RE[...]

  • Page 18

    18 [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 was receiv ed 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.[...]

  • Page 19

    19 • 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 wireless remote controller with condition abov e, f ollowing phenomena take place . • No signals from the remote controller can be received. • OPE la[...]

  • Page 20

    20 10-3. SELF-DIAGNOSIS ACTION T ABLE Note: Refer to the manual of outdoor unit for the details of display such as F , U, and other 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 un[...]

  • Page 21

    21 Error Code Abnormal point and detection method Cause Countermeasure P6 Freezing/overheating protection is work- ing  Freezing protection (Cooling mode) The unit is in 6-minute resume prevention mode if pipe <liquid or condenser/evapo- rator> temperature stays under Û&>Û)@IRU PLQXWHV PLQXWHV?[...]

  • Page 22

    22 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 rese[...]

  • Page 23

    23 E6  Contact failure, short circuit or , miswiring (converse wiring) of indoor/outdoor unit connecting wire  Defective transmitting receiving circuit of indoor controller board  Defective transmitting receiving circuit of indoor controller board  Noise has entered into indoor/ outdoor unit connecting wire. H Check LED display on the o[...]

  • Page 24

    24 (For the separate indoor/outdoor unit power sup- ply system)  Power supply of 208/230V AC is not supplied to indoor unit.  The connectors of the optional replacement kit are not used.  Defective indoor controller board 10-4. TROUBLESHOOTING BY INFERIOR PHENOMENA Note: Refer to the manual of outdoor unit for the detail of remote controll[...]

  • Page 25

    25 Note: Refer to the manual of outdoor unit for the detail of remote controller . (3)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 [...]

  • Page 26

    26 10-5. EMERGENCY OPERA TION 10-5-1. When wireless remote controller troubles or its battery is exhausted 10-5-2. When wired remote controller or indoor unit microcomputer troubles When the remote controller cannot be used When the batteries of the remote controller run out or the remote control - ler malfunctions, the emergency operation can be d[...]

  • Page 27

    27 10-6. HOW TO CHECK THE P ARTS PLA-A12BA PLA-A18BA PLA-A24BA PLA-A30BA PLA-A36BA PLA-A42BA PLA-A12BA 1 PLA-A18BA 1 PLA-A24BA 1 PLA-A30BA 1 PLA-A36BA 1 PLA-A42BA 1 P ar ts name Check points Disconnect the connector then measure the resistance with a tester . (At the ambient temperature of 10˚C[50˚F]~30˚C[86˚F]) Measure the resistance between t[...]

  • Page 28

    28 <Thermistor Characteristic graph> Room temperature thermistor(TH1) Pipe temperature thermistor/liquid(TH2) Condenser/evaporator temperature thermistor(TH5) Thermistor R 0 =15k  ± 3% Fixed number of B=3480  ± 2% t(  )Rt=15exp { 3480( ) } 7Û)5W H[S ^   ` 0  ?[...]

  • Page 29

    29 10-7.TEST POINT DIAGRAM Indoor controller board PLA-A12BA PLA-A18BA PLA-A24BA PLA-A30BA PLA-A36BA PLA-A42BA PLA-A12BA 1 PLA-A18BA 1 PLA-A24BA 1 PLA-A30BA 1 PLA-A36BA 1 PLA-A42BA 1 CN3C T ransmission (Indoor/outdoor) (0~24V DC) SW2 Capacity setting SW1 Model selection CN2L Connector (LOSSNA Y) CN41 Connector (HA terminal-A) CN90 Connect to the wi[...]

  • Page 30

    30 SW1 Setting by the dip s witch and jumper wire Functions Jumper wire Model settings Capacity settings P air number setting with wireless remote controller Remarks SW2 J41 J42 Unit type setting JP1 Indoor controller board type setting JP3 0 1 2 3 ~ 9 Wireless remote controller setting Control PCB setting J41 J42 <Initial setting> Wireless r[...]

  • Page 31

    31 31 11 SPECIAL FUNCTION Operation pattern OC-1 OC-2 IC-1 IC-2 3(2) 3(2) 2 RC 2 Main unit Sub unit Refrigerant address "01" Refrigerant address "00" Fig 1  [Back-up function only]··· Request code number "312"  [Rotation function] & [Back-up function]··· Request code number "313~318" (Ex:When [...]

  • Page 32

    32 32 (1) Request Code List Rotation setting Initial setting Initial setting 2nd stage cut-in setting Setting contents Setting No. (Request code) No.7 (316) No.8 (317) No.9 (318) Rotation and Back-up OFF (Normal group control operation) Monitoring the request code of current setting. Setting No. (Request code) No.1 (310) No.2 (31 1) No.3 (312) No.4[...]

  • Page 33

    33 33 (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 running the air-conditioner(  ). 2. Press the button (  ) for 3 seconds so that [Maintenance mode] appears on the screen (at  ). Aft[...]

  • Page 34

    34 11 DISASSEMBL Y PROCEDURE OPERA TING PROCEDURE PHOTOS & ILLUSTRA TIONS 1. Removing the air intake grille (1) Slide the knob of air intake grille toward the arrow  to open the air intake grille. (2) Remove drop prevention hook from the panel. (3) Slide the shaft in the hinge to the direction of the arrow  and remove the air intake grill[...]

  • Page 35

    35 OPERA TING PROCEDURE PHOTOS & ILLUSTRA TIONS 8. Removing the pipe temperature thermistor (TH2) and condenser evaporator temperature thermistor (TH5) (1) Remove the drain pan. (See photo 6) (2) Remove the turbo fan. (See photo 3) (3) Remove the 2 wiring clamps. (See photo 3) (4) Remove the coil plate (2 screws). (5) Remove the thermistors whi[...]

  • Page 36

    OPERA TING PROCEDURE PHOTOS & ILLUSTRA TIONS 9. Removing the drain pump (DP) and float switch (FS) (1) Remove the drain pan. (See photo 6) (2) Cut the hose band and remove the hose. (3) Remove the drain pump assembly (3 screws and 2 hooks). (4) Remove the drain pump (3 screws). (5) Remove the float switch (2 screws). Photo 8 Photo 9 Drain pump [...]