Instruction/ maintenance manual of the product PLA-A18AA Mitsumi electronic
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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.
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 .
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.
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 .
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.
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 .
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.
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.
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.
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.
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) 1.
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.
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 h.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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 .
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.
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.
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.
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 In.
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.
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.
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.
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.
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 PIP.
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 TEMPERAT.
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.
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.
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.
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.
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 .
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 I.
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 I.
43 OC370B--2.qxp 07.6.20 2:41 PM Page 43.
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.
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If you have not bought Mitsumi electronic PLA-A18AA yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Mitsumi electronic PLA-A18AA - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Mitsumi electronic PLA-A18AA you will learn all the available features of the product, as well as information on its operation. The information that you get Mitsumi electronic PLA-A18AA will certainly help you make a decision on the purchase.
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However, one of the most important roles played by the user manual is to help in solving problems with Mitsumi electronic PLA-A18AA. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Mitsumi electronic PLA-A18AA along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
