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Mitsumi electronic PLA-A24AA 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 No. OC370 REVISED EDITION-B CONTENTS 1. TECHNICAL CHANGES ··································2 2 . REFERENCE MANUAL ······································2 3. SAFETY PRECAUTION ·······?[...]

  • Page 2

    2 1 TECHNICAL CHANGES 2 REFERENCE MANUAL Service 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 Service Manual No. OC367 2-1. OUTDOOR UNIT SERVICE MANUAL Series (Outdoor unit) PUZ-A·NHA(-BS) PUY-A·NHA(-BS) Manual No . OCS04 2-2. TECHNICAL DA T A BOOK PLA-A12AA ➔ PLA-A12AA [...]

  • 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 hazardous for use, oxides, dirt, shaving particles, etc. In addition, use pipes with specified thi[...]

  • Page 4

    4 Gravimeter Unit [3] Service tools Use the below service tools as exclusive tools for R410A refrigerant. No. Specifications 1 Gauge manifold ·Only for R410A ·Use 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 . [...]

  • Page 5

    5 P ART NAMES AND FUNCTIONS 4 Auto Air Swing Vane Disperses airflow up and down and adjusts the angle of airflow direction. Grille Filter Removes dust and pollutants from intake air. Horizontal Air Outlet Sets horizontal airflow automatically during cooling or dehumidifying. Air Intake Intakes air from room. ● Indoor Unit ● Wired remote control[...]

  • Page 6

    6 ● Wired remote controller ● ● ˚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 AUTO OFF Note: “PLEASE W AIT” 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 [...]

  • Page 7

    7 ON/OFF TEMP FAN VANE TEST RUN AUTO STOP AUTO START h min LOUVER MODE CHECK RESET SET CLOCK MODEL SELECT NOT AVAILABLE SWING CHECK FAN TEST RUN ˚F ˚C AMPM STOP START AMPM COOL DRY AUTO FAN HEAT V ANE CONTROL button Changes the air flow direction. CLOCK button RESET button SET button ON/OFF button The unit is turned ON and OFF alternately each ti[...]

  • Page 8

    8 Single phase,60Hz, 208/230V 15 1 Munsell 0.70Y 8.59/0.97 Plate fin coil Turbo fan (direct) o 1 0.070 0.79 Dry: 15-16-18-20(530-570-640-710) Wet:14-15-17-19(490-530-600-670) 0(direct blow) – Remote controller & built-in 28-30-32-34 32 (1-1/4) PLA-A18AA/ PLA-A18AA 1 UNIT : 840 (33-1/16) PANEL : 950 (37-3/8) UNIT : 840 (33-1/16) PANEL : 950 (3[...]

  • Page 9

    9 UNIT : 840 (33-1/16) PANEL : 950 (37-3/8) UNIT : 840 (33-1/16) PANEL : 950 (37-3/8) UNIT : 298 (11-3/4) PANEL : 30 (1-3/16) UNIT : 30 (66) P ANEL : 5 (11) PLA-A36AA/ PLA-A36AA 1 Single phase,60Hz, 208/230V 15 2 Munsell 0.70Y 8.59/0.97 Plate fin coil Turbo fan (direct) o 1 0.110 1.25 Dry: 20-23-26-28(710-810-920-990) Wet: 19-22-25-27(670-770-880-9[...]

  • Page 10

    10 6 NOISE CRITERION CUR VES PLA-A12AA PLA-A12AA 1 NOTCH SPL(dB) LINE High Medium1 Medium2 Low 31 29 28 27 90 80 70 60 50 40 30 20 10 63 125 250 500 1000 2000 4000 8000 APPROXIMATE THRESHOLD OF HEARING FOR CONTINUOUS NOISE NC-60 NC-50 NC-40 NC-30 NC-20 NC-70 OCT A VE BAND SOUND PRESSURE LEVEL, dB (0 dB = 0.0002 µ bar) BAND CENTER FREQUENCIES, Hz P[...]

  • Page 11

    PLA-A12AA 1 PLA-A18AA 1 PLA-A24AA 1 PLA-A30AA 1 PLA-A36AA 1 PLA-A42AA 1 11 INDOOR UNIT PLA-A12AA PLA-A18AA PLA-A24AA PLA-A30AA PLA-A36AA PLA-A42AA 7 OUTLINES AND DIMENSIONS Unit : inch(mm) 1-1/2(37) 14-23/32(374) 11/16 (17 ) 2-3/8(60) 11-1/4(286) 1-31/32~2-3/4 4-1/8(105) B A 7-15/32(190) D 3-5/16 (84) 3-5/32 (80) 5/8F 3/8F 24/30/36/42 12/18 1 Liqui[...]

  • Page 12

    12 8 WIRING DIAGRAM I.B SWE ON OFF SW2 SW1 Refer to tables 1 and 2 for service PCB. HEATER CN24 ( YLW ) D.SENSOR CN31 ( WHT ) 1 2 3 INTAKE CN20 ( RED ) 1 2 LIQUID CN21 ( WHT ) PIPE CN29 ( BLK ) 1 2 1 2 REMOCON CN22 ( BLU ) 1 2 TH5 TH1 DS TH2 2 1 TB5 R.B TB6 12 TRANSMISSION WIRES DC12V LED3 LED2 LED1 CN41 CN2L CN51 CN32 WIRELESS CN90 ( WHT ) VANE CN[...]

  • Page 13

    13 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 14

    14 10 TROUBLESHOOTING <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 inferior phenomenon reoccurrence at field are summarized in the table below[...]

  • Page 15

    15 [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. • "CHECK" lights, and refrigerant address "00" blinks. • Che[...]

  • Page 16

    16 [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 start signal was received and the OPERATION INDICATOR lamp does not come on, there are no error records. *2 If the beeper sounds 3 times continuously “beep, beep, beep (0.4 + 0.4 + 0.[...]

  • Page 17

    17 • If the unit cannot be operated properly after the test run has been performed, refer to the following 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 above, following phenomena take place. • No signals from the remote controller can be receiv[...]

  • Page 18

    18 Error Code Abnormal point and detection method Cause Countermeasure P1 Room temperature thermistor (TH1) 1 The unit is in 3-minute resume preven- tion mode if short/open of thermistor is detected. Abnormal if the unit does not reset normally after 3 minutes. (The unit returns to normal operation, if it has been reset normally .) 2 Constantly det[...]

  • Page 19

    19 Error Code Abnormal point and detection method Cause Countermeasure P6 Freezing/overheating protection is working 1 Freezing protection (Cooling mode) The unit is in 6-minute resume prevention mode if pipe <liquid or condenser/evap- orator> temperature stays under -15 : (5˚F) for 3 minutes, 3 minutes after the compressor started. Abnormal[...]

  • Page 20

    20 Error Code Abnormal point and detection method Cause Countermeasure P9 Pipe temperature thermistor / Condenser-Evaporator (TH5) 1 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 [...]

  • Page 21

    21 E6 1 Contact failure, short circuit or , miswiring (converse wiring) of indoor/outdoor unit connecting wire 2 Defective transmitting receiving circuit of indoor controller board 3 Defective transmitting receiving circuit of indoor controller board 4 Noise has entered into indoor/ outdoor unit connecting wire. ∗ Check LED display on the outdoor[...]

  • Page 22

    22 (For the separate indoor/outdoor unit power sup- ply system) 1 Power supply of 208/230V AC is not supplied to indoor unit. 2 The connectors of the optional replacement kit are not used. 3 Defective indoor controller board 4 Defective indoor power board 10-4. TROUBLESHOOTING BY INFERIOR PHENOMENA Note: Refer to the manual of outdoor unit for the [...]

  • Page 23

    23 Note: Refer to the manual of outdoor unit for the detail of remote controller . (3)Upward/downward vane performance failure 1 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) 2 V ane motor does not rotate. • Defective vane motor • Breaking of w[...]

  • Page 24

    24 10-5. EMERGENCY OPERA TION 10-5-1. When wireless remote controller has troubles or its battery is exhausted 1. Emergency operation is available in such a case using emergency operation switch equipped on the grille. 2. T o start operation • Cooling Operation·······Press (Cooling) switch. • Heating Operation·······Press (Heating[...]

  • Page 25

    25 1 1 2 2 3 3 Red White Black Parts name Check points Disconnect the connector then measure the resistance using a tester . (At the ambient temperature 10 : (50˚F)~30 : (86˚F)) Measure the resistance between the terminals using a tester . (At the ambient temperature20 : (68˚F)) Measure the resistance between the terminals using a tester . (Wind[...]

  • Page 26

    26 0 10 20 30 40 50 -20 -10 0 10 20 30 40 50 -4 -14 32 50 68 86 104 122 : ° F T emperature Resistance (k " ) <Thermistor for lower temperature> <Thermistor Characteristic graph> Room temperature thermistor(TH1) Pipe temperature thermistor/liquid(TH2) Condenser/evaporator temperature thermistor(TH5) Thermistor R 0 =15k ' ±3 %[...]

  • Page 27

    27 10-7.TEST POINT DIAGRAM 10-7-1. Power board PLA-A12AA PLA-A18AA PLA-A24AA PLA-A30AA PLA-A36AA PLA-A42AA PLA-A12AA 1 PLA-A18AA 1 PLA-A24AA 1 PLA-A30AA 1 PLA-A36AA 1 PLA-A42AA 1 CNSK Connect to the indoor controller board (CNDK) between 1 to 3 208/230V AC CN2S Connect to the indoor controller board (CN2D) between 1 to 3 12.6-13.7V DC (Pin 1 (+)) O[...]

  • Page 28

    28 10-7-2. Indoor controller board PLA-A12AA PLA-A18AA PLA-A24AA PLA-A30AA PLA-A36AA PLA-A42AA PLA-A12AA 1 PLA-A18AA 1 PLA-A24AA 1 PLA-A30AA 1 PLA-A36AA 1 PLA-A42AA 1 CN2D Connect to the indoor power board (CN2S) (12.5~13.7V DC) CNDK Connect to the indoor power board (CNSK) (208/230V AC) FUSE (6.3 A 250 V) CN22 Connect to the terminal block(TB5) (R[...]

  • Page 29

    29 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 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 rem[...]

  • Page 30

    30 DISASSEMBL Y PROCEDURE OPERA TING PROCEDURE PHOTOS & ILLUSTRA TIONS 1. Removing the air intake grille (1) Slide the knob of air intake grille to the direction of the arrow 1 to open the air intake grille. (2) Remove the string hook from the panel to prevent the grille from dropping. (3) Slide the shaft in the hinge to the direction of the ar[...]

  • Page 31

    31 OPERA TING PROCEDURE PHOTOS & ILLUSTRA TIONS 6. Removing the panel (1) Remove the air intake grille.(See figure 1) Corner panel (See figure 2) (1) Remove the corner screw . (2) Slide the corner panel to the direction of the arrow 3 , and remove the corner panel. Panel (See photo 5) (1) Disconnect the connector that connects with the unit. (2[...]

  • Page 32

    32 OPERA TING PROCEDURE PHOTOS & ILLUSTRA TIONS 9. Removing the heat exchanger (1) Remove the panel. (See photo 5) (2) Remove the bell mouth. (See photo 1) (3) Remove the electrical box. (See photo 2) (4) Remove the drain pan. (See photo 6) (5) Remove the turbo fan. (See photo 3) (6) Remove the 3 screws of the piping cover , and pull out piping[...]

  • Page 33

    33 12 P ARTS LIST (non-RoHS compliant) 1 10 2 3 3 4 5 9 8 7 6 3 GEAR GEAR (V ANE) V ANE BUSH V ANE MOTOR ON/OFF CENTRALLY CONTROLLED ERROR CODE CLOCK ON OFF ˚C CHECK CHECK MODE FILTER TEST RUN FUNCTION ˚C 1Hr. NOT AVAILABLE STAND BY DEFROST TEMP. 11 P ANEL P ARTS PLA-A12AA PLA-A18AA PLA-A24AA PLA-A30AA PLA-A36AA PLA-A42AA No. Parts No. Parts Name[...]

  • Page 34

    34 No. Parts No. Parts Name Q'ty / set PLA-A·AA 12 18 24, 30 Wiring Diagram Symbol Recom- mended Q'ty 1 2 3 4 5 6 7 8 9 TURBO FAN SPL WASHER HEAT EXCHANGER HEAT EXCHANGER HEAT EXCHANGER PIPE TEMPERATURE THERMISTOR CONDENSER / EVAPORATOR TEMPERATURE THERMISTOR MOTOR CAP LEAD ASSY(F/M) FAN MOTOR RUBBER MOUNT R01 E28 114 R01 08K 097 T7W H20[...]

  • Page 35

    35 Q'ty / set 36, 42 Specification Remarks (Drawing No.) No. Parts No. Parts Name Wiring Diagram Symbol Recom- mended Q'ty 1 2 3 4 5 6 7 8 9 TURBO FAN SPL WASHER HEAT EXCHANGER PIPE TEMPERATURE THERMISTOR CONDENSER / EVAPORATOR TEMPERATURE THERMISTOR MOTOR CAP LEAD ASSY(F/M) FAN MOTOR RUBBER MOUNT 1 1 1 1 1 1 1 1 4 TH2 TH5 MF D17CP110MS T[...]

  • Page 36

    36 No. Parts No. Parts Name Wiring Diagram Symbol Recom- mended Q'ty 1 2 3 4 5 6 7 8 9 10 11 12 13 14 DRAIN PAN DRAIN HOSE DRAIN PUMP DRAIN SENSOR SENSOR HOLDER INDOOR POWER BOARD INDOOR CONTROLLER BOARD ROOM TEMPERATURE THERMISTOR TERMINAL BLOCK TERMINAL BLOCK TERMINAL BLOCK CAPACITOR DRAIN PLUG DRAIN PLUG 1 1 1 1 1 1 1 1 1 1 1 1 1 1 DP DS P.[...]

  • Page 37

    37 No. Parts No. Parts Name Wiring Diagram Symbol Recom- mended Q'ty 1 2 3 4 5 6 7 8 9 10 11 12 13 14 DRAIN PAN DRAIN HOSE DRAIN PUMP DRAIN SENSOR SENSOR HOLDER INDOOR POWER BOARD INDOOR CONTROLLER BOARD ROOM TEMPERATURE THERMISTOR TERMINAL BLOCK TERMINAL BLOCK TERMINAL BLOCK CAPACITOR DRAIN PLUG DRAIN PLUG 1 1 1 1 1 1 1 1 1 1 1 1 1 1 DP DS P.[...]

  • Page 38

    38 13 RoHS P ARTS LIST 1 10 2 3 3 4 5 9 8 7 6 3 GEAR GEAR (V ANE) V ANE BUSH V ANE MOTOR ON/OFF CENTRALLY CONTROLLED ERROR CODE CLOCK ON OFF ˚C CHECK CHECK MODE FILTER TEST RUN FUNCTION ˚C 1Hr. NOT AVAILABLE STAND BY DEFROST TEMP. 11 P ANEL P ARTS PLA-A12AA 1 PLA-A18AA 1 PLA-A24AA 1 PLA-A30AA 1 PLA-A36AA 1 PLA-A42AA 1 No. Parts No. Parts Name Spe[...]

  • Page 39

    39 No. Parts No. Parts Name Q'ty / set PLA-A·AA 1 12 18 24, 30 Wiring Diagram Symbol Recom- mended Q'ty 1 2 3 4 5 6 7 8 9 RoHS G G G G G G G G G G G TURBO FAN SPL WASHER HEAT EXCHANGER HEAT EXCHANGER HEAT EXCHANGER PIPE TEMPERATURE THERMISTOR CONDENSER / EVAPORATOR TEMPERATURE THERMISTOR MOTOR CAP LEAD ASSY (F/M) FAN MOTOR RUBBER MOUNT R[...]

  • Page 40

    40 Q'ty / set 36, 42 Specification Remarks (Drawing No.) No. Parts No. Parts Name Wiring Diagram Symbol Recom- mended Q'ty 1 2 3 4 5 6 7 8 9 RoHS G G G G G G G G G TURBO FAN SPL WASHER HEAT EXCHANGER PIPE TEMPERATURE THERMISTOR CONDENSER / EVAPORATOR TEMPERATURE THERMISTOR MOTOR CAP LEAD ASSY(F/M) FAN MOTOR RUBBER MOUNT 1 1 1 1 1 1 1 1 4 [...]

  • Page 41

    41 No. Parts No. Parts Name Wiring Diagram Symbol Recom- mended Q'ty 1 2 3 4 5 6 7 8 9 10 11 12 13 14 RoHS G G G G G G G G G G G G G G DRAIN PAN DRAIN HOSE DRAIN PUMP DRAIN SENSOR SENSOR HOLDER INDOOR POWER BOARD INDOOR CONTROLLER BOARD ROOM TEMPERATURE THERMISTOR TERMINAL BLOCK TERMINAL BLOCK TERMINAL BLOCK CAPACITOR DRAIN PLUG DRAIN PLUG 1 1[...]

  • Page 42

    42 No. Parts No. Parts Name Wiring Diagram Symbol Recom- mended Q'ty 1 2 3 4 5 6 7 8 9 10 11 12 13 14 RoHS G G G G G G G G G G G G G G DRAIN PAN DRAIN HOSE DRAIN PUMP DRAIN SENSOR SENSOR HOLDER INDOOR POWER BOARD INDOOR CONTROLLER BOARD ROOM TEMPERATURE THERMISTOR TERMINAL BLOCK TERMINAL BLOCK TERMINAL BLOCK CAPACITOR DRAIN PLUG DRAIN PLUG 1 1[...]

  • Page 43

    43 OC370B--2.qxp 07.6.20 2:41 PM Page 43[...]

  • Page 44

    C Copyright 2006 MITSUBISHI ELECTRIC ENGINEERING CO., L TD. Distributed in Jun. 2007 No.OC370 REVISED EDITION-B PDF 9 Distributed in Aug. 2006 No.OC370 REVISED EDITION-A PDF 9 Distributed in Feb. 2006 No.OC370 PDF 10 Made in Japan New publication, effective Jun. 2007 Specifications subject to change without notice. TM HEAD OFFICE : TOKYO BLDG., 2-7[...]