Mitsubishi Electric PKA-A24KA4.TH Manual

Page 2 - REFERENCE MANUAL; OUTDOOR UNIT SERVICE MANUAL; Radio frequency interface; RF thermostat

2 1 REFERENCE MANUAL OUTDOOR UNIT SERVICE MANUAL Service Ref. Service Manual No. PUZ-A24/30/36NHA4PUZ-A24/30/36NHA4-BSPUY-A24/30/36NHA4PUY-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 ...

Page 3 - SAFETY PRECAUTION; Cautions for units utilising refrigerant R410A; Use new refrigerant pipes.; Never use any refrigerant other than that specified.

3 SAFETY PRECAUTION 2 Cautions for units utilising refrigerant R410A 2-2. CAUTIONS RELATED 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 pack...

Page 4 - PART NAMES AND FUNCTIONS; Indoor unit; Be sure to use a filter drier for new refrigerant.; When charging directly from cylinder

4 Gravimeter Unit [3] Service tools Use the below service tools as exclusive tools for R410A refrigerant. 3 PART NAMES AND FUNCTIONS Indoor unit Emergency operation switch Front grille Air inlet Filter Air outlet Louver Vane No. Tool name Specifications 1 Gauge manifold · Only for R410A· Use the exi...

Page 5 - Wired; °F°C; Display Section

5 Wired remote controller (Option) °F°C °F°C ERROR CODE AFTER TIMER TIME SUN MON TUE WED THU FRI SAT ONOFF HrAFTER FILTER FUNCTION ONLY1Hr. WEEKLY SIMPLE AUTO OFF PAR-21MAA ON/OFF FILTER CHECK OPERATION CLEAR TEST TEMP. MENU BACK DAY MONITOR/SET CLOCK ON/OFF •• Display Section For purposes of this e...

Page 6 - IR wireless

6 IR wireless remote controller (Option) 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 VANE CONTROL button Changes the air flow direction. CLOCK button R...

Page 7 - SPECIFICATIONS; INDOOR UNIT

7 SPECIFICATIONS 4 AA 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 SizeMin.Circuit Ampacity External finishHeat exchangerFan Fan(drive) % No. Fan motor outputFan motor Airflow(Low-Middle-High) External static press...

Page 8 - NOISE CRITERION CURVES; UNIT

8 5 NOISE CRITERION CURVES UNIT WALL 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 APPROXIMATETHRESHOLD OFHEARING FORCONTINUOUSNOISE High...

Page 9 - OUTLINES AND DIMENSIONS

9 OUTLINES AND DIMENSIONS 6 Front side 46-1/16(1170) 9-1/2(241) 33-21/32(855) 2-29/32(74) 14-3/8(365) Emergency operation switch (cooling/heating) Terminal block for Outdoor unit Terminal block for MA-remote controller Front side(Grille open) Terminal block for power supply (option) Filter hook 6-1/...

Page 10 - WIRING DIAGRAM

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 adapt...

Page 11 - REFRIGERANT SYSTEM DIAGRAM; Heat exchanger

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 coolingRefrigerant flow in heating Strainer (#50) Strainer (#50) Heat exchanger Refrigerant GAS p...

Page 12 - TROUBLESHOOTING

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 fi...

Page 13 - Malfunction-diagnosis method at maintenance service>; CHECK button; IR wireless remote controller

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 FAN VANE MODE CHECK...

Page 20 - -4. TROUBLESHOOTING BY INFERIOR PHENOMENA

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 heatpreparation and when the thermostat is OFF in HEATmode. (Working of COOL protection function)Vane motor does not rotate. • ...

Page 21 - Note on the IR wireless remote control

21 9-5. EMERGENCY OPERATION 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/STAND BY lamp (ORANGE) Operation lamp (GREEN) Emergency operation switch (...

Page 22 - (At the ambient temperature 50; Thermistor R

22 9-6. HOW TO CHECK THE PARTS Parts name Check points Vane motor (MV) Measure the resistance between the terminals using a tester. (Coil temperature 68 " F ) Normal 250 ± 7% Abnormal - Brown-Red - Brown-Orange - Brown-Yellow - Brown-Green Open or short Fan motor (MF) Red Yellow Brown Orange Gre...

Page 23 - Wiring contact check; Sensor signal check

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 circu...

Page 24 - Indoor controller board; CNMF

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 - ...

Page 25 - -8. FUNCTIONS OF DIP SWITCH AND JUMPER WIRE

25 SW1 Setting by the dip switch and jumper wire Functions Jumper wire Modelsettings Capacitysettings Pair numbersetting withwirelessremotecontroller Remarks SW2 J41J42 Indoorcontrollerboard type setting JP3 012 3 ~ 9 Wireless remote controller setting Control PCB setting J41 J42 <Initial setting...

Page 26 - SPECIAL FUNCTION; again the former request code No.; Outline of functions; Main unit; System constraint; Operation pattern

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. • To 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...

Page 27 - • This function is available only in cooling mode.; NOTE; Rotation setting

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-i...

Page 28 - (2) Setting method of each function by wired remote controller; TEST

28 (2) Setting method of each function by wired remote controller B: Refrigerant addressC: Data display areaD: Request code display area TEST CHECK FILTER FILTER ON/OFF 1. Stop operation( ). 2. Press the button ( ) for 3 seconds so that [Maintenance mode] appears on the screen ( ). After a while, [0...

Page 29 - DISASSEMBLY PROCEDURE; Water Cut; PHOTOS & ILLUSTRATIONS

29 DISASSEMBLY PROCEDURE 11 PKA-A24KA4.TH PKA-A30KA4.TH PKA-A36KA4.TH 1. REMOVING THE PANEL (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 p...

Page 30 - Screw of electrical box; PHOTOS

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...

Page 31 - (10) Lift the heat exchanger, and pull out the line flow fan to the; Screws of the motor bed

31 6. REMOVING THE INDOOR FAN MOTOR AND THE LINE FLOW FAN (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 Ph...