Benutzeranleitung / Produktwartung PKA-A24KA4.TH des Produzenten Mitsumi electronic
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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 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.
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.
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 .
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 .
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.
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.
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.
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.
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 .
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 .
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 .
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.
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.
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 .
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, an d o th er 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.
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.
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.
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.
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.
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 control.
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 .
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.
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.
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 .
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.
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”.
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 ( ).
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.
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.
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.
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 .
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