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Mitsubishi Electric PVA-A30AA4 Service Manual

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SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
2015

SERVICE MANUAL

Series PVA
Model name
Model name
<Indoor unit>
<Indoor unit>
PVA-A30AA4
PVA-A36AA4
PVA-A42AA4
INDOOR UNIT

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   Summary of Contents for Mitsubishi Electric PVA-A30AA4

  • Page 1: Service Manual

    SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS 2015 SERVICE MANUAL Series PVA Model name Model name <Indoor unit> <Indoor unit> PVA-A30AA4 PVA-A36AA4 PVA-A42AA4 INDOOR UNIT...
  • Page 3: Table Of Contents

    ONTENTS . SAFETY PRECAUTION 2. PART NAMES AND FUNCTIONS 3. SPECIFICATION 4. FAN PERFORMANCE AND CORRECTED AIR FLOW 5. SOUND PRESSURE LEVELS 6. OUTLINES & DIMENSIONS 7. WIRING DIAGRAM 8. REFRIGERANT SYSTEM DIAGRAM 9. HEATER CONTROL 0. HUMIDIFIER CONTROL . ERV (ENERGY RECOVERY VENTILATION) CONTROL 2.
  • Page 4: Safety Precaution

    SAFETY PRECAUTION 1-1. ALWAYS OBSERVE FOR SAFETY Before obtaining access to terminal, all supply circuits must be disconnected. 1-2. CAUTIONS RELATED TO NEW REFRIGERANT Cautions for units utilising refrigerant R410A Use new refrigerant pipes. Do not use refrigerant other than R410A. In case of using the existing pipes for R22, be careful with If other refrigerant (R22 etc.) is used, chlorine in refrige- the followings.
  • Page 5: Part Names And Functions

    Unit Gravimeter [3] Service tools Use the below service tools as exclusive tools for R410A refrigerant. Tool 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. ·...
  • Page 6: Specification

    (3)Horizontal left (4)Down flow Air inlet inlet outlet Air outlet SPECIFICATION Service Ref. PVA-A30AA4 Power supply (phase, cycle, voltage) 1 phase, 60Hz, 208/230V Max. Fuse Size Min. Circuit Ampacity 4.13 External finish Galvanized steel cabinet - Powder coated Slate Gray...
  • Page 7 Service Ref. PVA-A42AA4 Power supply (phase, cycle, voltage) 1 phase, 60Hz, 208/230V Max. Fuse Size Min. Circuit Ampacity 5.63 External finish Galvanized Steel Cabinet - Powder coated Slate Gray Heat exchanger Plate fin coil Fan (drive) × No. Sirocco fan × 1 an motor output 0.430 F.L.A...
  • Page 8: Fan Performance And Corrected Air Flow

    FAN PERFORMANCE AND CORRECTED AIR FLOW PVA-A30AA4 • Vertical, Horizontal Right, Horizontal Left • Downflow External static pressure 0.30 [in.WG] (75Pa) 208/230V 60Hz External static pressure 0.30 [in.WG] (75Pa) 208/230V 60Hz [0.40] [0.40] High [0.30] [0.30] High Middle Middle [0.20] [0.20]...
  • Page 9 PVA-A36AA4 • Vertical, Horizontal Right, Horizontal Left • Downflow External static pressure 0.30 [in.WG] (75Pa) 208/230V 60Hz External static pressure 0.30 [in.WG] (75Pa) 208/230V 60Hz [0.40] [0.40] [0.30] [0.30] High High [0.20] [0.20] Middle Middle [0.10] [0.10] [706] [883] [1059] [1236] [1306] [706]...
  • Page 10 PVA-A42AA4 • Vertical, Horizontal Right, Horizontal Left • Downflow External static pressure 0.30 [in.WG] (75Pa) 208/230V 60Hz External static pressure 0.30 [in.WG] (75Pa) 208/230V 60Hz [0.40] [0.50] [0.40] High [0.30] High [0.30] Middle [0.20] Middle [0.20] [0.10] [0.10] [918] [1059] [1236] [1412] [1589]...
  • Page 11 PVA-A30, 36, 42AA4 Air filter Power source: 208/230V 60Hz [0.100] A36, 42 [0.080] [0.060] [0.040] [0.020] [353] [706] [1059] [1412] [1766] Airflow rate (m /min)[cfm]...
  • Page 12: Sound Pressure Levels

    SOUND PRESSURE LEVELS 5-1. Sound pressure level Ceiling concealed ux.duct Front side 3-1/4ft. (1m) Measurement location ux.duct 5-2. NC curves PVA-A30AA4 PVA-A36AA4 External static pressure 0.30 [in.WG] (75Pa) External static pressure 0.30 [in.WG] (75Pa) 70.0 70.0 High High Middle Middle 65.0...
  • Page 13 PVA-A42AA4 External static pressure .3 [in.WG] (75Pa) High Middle NC-6 NC-5 NC-4 NC-3 Approximate minimum NC-2 audible limit on continuous noise Octave band center frequencies (Hz) External static pressure .5 [in.WG] (125Pa) High Middle NC-6 NC-5 NC-4 NC-3 Approximate minimum NC-2 audible limit on continuous noise...
  • Page 14: Outlines & Dimensions

    OUTLINES & DIMENSIONS INDOOR UNIT PVA-A30, 36, 42AA4...
  • Page 16: Wiring Diagram

    CN44 CN4F CNXA2 (RED) (YELLOW) (RED) SWITCH MODEL DC280-340V CN20 CN24-1 CN2L CNXC2 RECTIFIER CIRCUIT PVA-A30AA4 (BLUE) CNXB1 CNXC1 CNXA1 CNMF 76 5 4 1 2 3 PVA-A36AA4 PVA-A42AA4 12 3 4 5 6 7 8 9 LED1 W.B. t˚...
  • Page 17: Refrigerant System Diagram

    REFRIGERANT SYSTEM DIAGRAM PVA-A30, 36, 42AA4 Strainer (#50) Heat exchanger Refrigerant GAS pipe connection (Flare) Thermistor TH5 (Cond./ Eva.temperature) Refrigerant flow in cooling Refrigerant flow in heating Thermistor TH2 Pipe temperature(Liquid) Refrigerant LIQUID pipe connection (Flare) Thermistor TH1 (Room temperature) Strainer (#50) Distributor with strainer (#50)
  • Page 18: Heater Control

    HEATER CONTROL 9-1. CONTROL SPECIFICATIONS AND FUNCTION SETTING Table 1 shows how the field-installed heater is controlled. Select the desired pattern in the table below, and set the Function on the indoor units as shown in Table 1. Table.1 [Function table] Select unit numbers 01 to 03 or all units (AL [wired remote controller] / 07 [IR wireless remote controller]) Mode Setting...
  • Page 19: Fan Control

    9-2. FAN CONTROL By setting the Mode No. 23 in the Function Table in section 9-1, the following patterns of fan control will become possible. Fan control patterns Fan in defrost Fan(All modes other Factory CN4Y for FAN control Mode(function) than defrost) setting (PAC-YU25HT)
  • Page 20 (3) Locally procured wiring A basic connection method is shown below. Indoor unit Remote control board Relay circuit control board Adapter CN24-1 or CN24-2 White Electric Heater or panel heater Maximum cable length Preparations in the field is 10 m (32ft) For relay X use the specifications given below Operation coil Rated voltage: 12VDC Power consumption: 0.9W or less...
  • Page 21: Humidifier Control

    HUMIDIFIER CONTROL 10-1. CONTROL SPECIFICATIONS The below table shows how the field installed humidifier and fan speed is controlled. Mode (function) No. Humidistat Condition (no defrost/no error) CN25 output Fan speed output Wired remote controller (RF thermostat) 13 (113) 16 (116) CNF input Heat operation &...
  • Page 22: Erv (energy Recovery Ventilation) Control

    ERV (ENERGY RECOVERY VENTILATION) CONTROL 11-1. CONTROL SPECIFICATIONS The below table shows how the field installed ERV is controlled. ERV output Condition Fan speed CN2C output (=Fan output) CNER input Cool/Heat/Fan operation RC setting Defrost STOP STOP STOP Cool/Heat/Fan operation RC setting Defrost STOP...
  • Page 23: Troubleshooting

    TROUBLESHOOTING 12-1. CAUTIONS ON TROUBLESHOOTING (1) Before troubleshooting, check the followings: 1 Check the power supply voltage. 2 Check the indoor/outdoor connecting wire for mis-wiring. (2) Take care the followings during servicing. 1 Before servicing the air conditioner, be sure to turn off the remote controller first to stop the main unit, and then turn off the breaker.
  • Page 24 12-2. SELF-CHECK FUNCTION • Refer to the installation manual that comes with each remote controller for details. • RF thermostat is not established. [Output pattern A] Errors detected by indoor unit Wired remote controller IR wireless remote controller RF thermostat Symptom Remark Beeper sounds/OPERATION...
  • Page 25: Auto Restart Function

    For description of each LED (LED1, 2, 3) provided on the indoor controller, refer to the following table. LED 1 (power for microcomputer) Indicates whether control power is supplied. Make sure that this LED is always lit. LED 2 (power for remote controller) Indicates whether power is supplied to the remote controller.
  • Page 26 Note: Refer to the manual of outdoor unit for the details of display 12-3. SELF-DIAGNOSIS ACTION TABLE such as F, U, and other E. Abnormal point and detection method Countermeasure Error Code Cause Room temperature 1 Defective thermistor 1–3 Check resistance value of thermistor. thermistor (TH1) characteristics 0:[32˚F]..15.0k"...
  • Page 27 Abnormal point and detection method Countermeasure Error Code Cause Freezing/overheating protection is (Cooling or drying mode) (Cooling or drying mode) working 1 Clogged filter (reduced airflow) 1 Check clogging of the filter. 1 Freezing protection (Cooling mode) 2 Short cycle of air path 2 Remove shields.
  • Page 28 Abnormal point and detection method Countermeasure Error Code Cause Abnormality of pipe temperature ther- 1 Defective thermistor 1–3 Check resistance value of thermistor. mistor / Condenser-Evaporator (TH5) characteristics For characteristics, refer to (P1) above. 2 Check contact failure of connector (CN44) 1 The unit is in three-minute resume pro- 2 Contact failure of connector on the indoor controller board.
  • Page 29 Abnormal point and detection method Countermeasure Error Code Cause ∗ Check LED display on the outdoor control cir- Indoor/outdoor unit communication 1 Contact failure, short circuit or, error (Signal receiving error) cuit board. (Connect A-control service tool, mis-wiring (converse wiring) of 1 Abnormal if indoor controller board PAC-SK52ST.) indoor/outdoor unit connecting...
  • Page 30 12-4. TROUBLESHOOTING BY INFERIOR PHENOMENA Note: Refer to the manual of outdoor unit for the detail of remote controller. Phenomena Cause Countermeasure (1)LED2 on indoor controller board • When LED1 on indoor controller board is also off. is off. 1 Power supply of rated voltage is not supplied to out- 1 Check the voltage of outdoor power door unit.
  • Page 31 12-5. TEST POINT DIAGRAM 12-5-1. Power supply board PVA-A30AA4 PVA-A36AA4 PVA-A42AA4 Power supply voltage (208 - 230VAC) CNMF Fan motor output 1 - 4: 310 - 340 VDC 5 - 4: 15 VDC 6 - 4: 0 - 6.5 VDC 7 - 4: Stop 0 or 15 VDC Run 7.5 VDC...
  • Page 32 12-5-2. Indoor controller board PVA-A30AA4 Emergency operation PVA-A36AA4 Model selection PVA-A42AA4 Capacity setting CN105 Radio frequency interface CN105 CN22 CN32 Remote start/stop adapter CN22 For MA remote controller cable con- CNXA2 nection (10 - 13 VDC) CN25 CNXC2 CN51 Centralized control...
  • Page 33 12-6. TROUBLE CRITERION OF MAIN PARTS PVA-A30AA4 PVA-A36AA4 PVA-A42AA4 Part name Check method and criterion Room temperature Measure the resistance with a tester. thermistor (Part temperature 10°C (50°F) ~ 30°C (86°F)) (TH1) Normal Abnormal Pipe temperature 4.3kΩ~9.6kΩ Opened or short-circuited...
  • Page 34 Replace the fan motor. of connector CNMF repeat 0V and 5V? Check the operation of fan. Check the operation of fan. Replace indoor controller board. Replace indoor controller board. PVA-A30AA4 PVA-A36,42AA4 Measuring points Resistance O.L. pin 1 - pin 3 1MΩ...
  • Page 35 Functions Remarks For service board Model settings Service board MODELS 1 2 3 4 5 PVA-A30AA4 1 2 3 4 5 PVA-A36AA4 Capacity settings 1 2 3 4 5 PVA-A42AA4 <Settings at time of factory shipment> Wireless remote controller: 0...
  • Page 36: Disassembly Procedure

    DISASSEMBLY PROCEDURE 1. Control box Exercise caution when removing heavy parts. 1. Remove the Electric panel (2 screws) 2. Remove the Control box cover (1 screw) Fig. 1 Fig. 2...
  • Page 37 2. Thermistor (Return Air) Exercise caution when removing heavy parts. 1. Remove the Filter panel (2 thumbscrews). 2. Remove the Blower panel (2 screws). Fig. 3 3. Remove the cover over the Return Air thermistor box and unplug the thermistor. 4.
  • Page 38 3. Coil Assembly Exercise caution when removing heavy parts. 1. Remove the Electrical, Blower and Filter panel indicated in sections 1 and 2. 2. Remove the Coil panel by removing all of the screws securing it to the (3) smaller panels for refrigerant and drain lines.
  • Page 39 5. Remove the plate covering the coil assembly to access the thermistors. Fig. 9 6. Remove lower and side drain pan. Fig. 10...
  • Page 40 4. Blower/Fan Assembly Exercise caution when removing heavy parts. 1. Remove the Blower and Filter panel (along with filter if installed) indicated in section 2. 2. Remove the (1 or 2) brackets that secure the coil assembly. Fig. 11 3. Remove the door that covers the small enclosure attached to the fan assembly (Fig.12).
  • Page 44 http://Global.MitsubishiElectric.com New publication effective Feb. 2015 Specifications subject to change without notice HWE1406A...

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Pva-a42aa4Pva-a36aa4

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