Mitsubishi Electric P Series Service Manual
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Mitsubishi Electric P Series Service Manual

Mitsubishi Electric P Series Service Manual

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P-SERIES
Air Conditioners
PVA-A12,18, 24, 30, 36, 42AA7
SERVICE MANUAL

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Questions and answers

Warren King
April 24, 2025

For a PVA-A24AA7, can the included washable air filter be replaced with a conventional high quality 1" x 20" x 20" HVAC filter?

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1 comments:
Mr. Anderson
May 12, 2025

No. The nominal filter size for the PVA-A24AA7 is not given in the context, but the PVA-A30AA4 uses a 20" x 20" x 1" filter, which may seem similar. However, compatibility depends on the exact filter dimensions and housing design. Without specific dimensions for the PVA-A24AA7, it cannot be confirmed that a 1" x 20" x 20" HVAC filter will fit.

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Summary of Contents for Mitsubishi Electric P Series

  • Page 1 P-SERIES Air Conditioners PVA-A12,18, 24, 30, 36, 42AA7 SERVICE MANUAL...

  • Page 2: Table Of Contents

    12.8. DC Fan motor (fan motor/indoor controller board) ............51 12.8.1. DC Fan motor measuring points ..............52 12.9. Functions of DIP switch and jumper wire ..............52 13. Disassembly Procedure ......................55 Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.

  • Page 3: Safety Precautions

    The following tools are necessary to use R410A refrigerant. Tools for R410A Gauge manifold Flare tool Charge hose Size adjustment gauge Gas leak detector Vacuum pump adapter Torque wrench Electronic refrigerant charging scale Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.
  • Page 4 Adaptor for reverse flow check ⑥ Refrigerant charge base ⑦ Refrigerant cylinder • Only for R410A • Top of cylinder (Pink) • Cylinder with syphon ⑧ Refrigerant recovery equipment Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.

  • Page 5: Part Names And Functions

    2. Part Names and Functions • Indoor Unit (1) Vertical (2) 2) Horizontal Right inlet outlet (3) 3) Horizontal Left (4) 4) Downflow Air inlet inlet outlet Air outlet Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.

  • Page 6: Specifications

    Airflow rate 613 - 744 - 875 (low-mid-high) Minimum circulation airflow External static in. WG 0.30 - 0.50 - 0.80 pressure [Pa] [75 - 125 - 200] Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.
  • Page 7 1040 - 1262 - 1485 (low-mid-high) Minimum circulation 1125 1485 airflow External static pressure in. WG 0.30 - 0.50 - 0.80 [Pa] [75 - 125 - 200] Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.

  • Page 8: Fan Performance And Corrected Airflow

    For downflow fan performance and corrected airflow, please see downflow kit manuals. Table 1. Model code 12 Vertical, Horizontal right, Horizontal left Downflow External static pressure: 75Pa, 0.30 [in. WG], Power source: 208/230 V, 60Hz Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.
  • Page 9 External static pressure: 125Pa, 0.50 [in. WG], Power source: 208/230 V, 60Hz Vertical, Horizontal right, Horizontal left Downflow External static pressure: 200Pa, 0.80 [in. WG], Power source: 208/230 V, 60Hz Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.
  • Page 10 External static pressure: 75Pa, 0.30 [in. WG], Power source: 208/230 V, 60Hz Vertical, Horizontal right, Horizontal left Downflow External static pressure: 125Pa, 0.50 [in. WG], Power source: 208/230 V, 60Hz Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.
  • Page 11 External static pressure: 200Pa, 0.80 [in. WG], Power source: 208/230 V, 60Hz Table 3. Model code 24 Vertical, Horizontal right, Horizontal left Downflow External static pressure: 75Pa, 0.30 [in. WG], Power source: 208/230 V, 60Hz Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.
  • Page 12 External static pressure: 125Pa, 0.50 [in. WG], Power source: 208/230 V, 60Hz Vertical, Horizontal right, Horizontal left Downflow External static pressure: 200Pa, 0.80 [in. WG], Power source: 208/230 V, 60Hz Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.
  • Page 13 External static pressure: 75Pa, 0.30 [in. WG], Power source: 208/230 V, 60Hz Vertical, Horizontal right, Horizontal left Downflow External static pressure: 125Pa, 0.50 [in. WG], Power source: 208/230 V, 60Hz Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.
  • Page 14 External static pressure: 200Pa, 0.80 [in. WG], Power source: 208/230 V, 60Hz Table 5. Model code 36 Vertical, Horizontal right, Horizontal left Downflow External static pressure: 75Pa, 0.30 [in. WG], Power source: 208/230 V, 60Hz Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.
  • Page 15 External static pressure: 125Pa, 0.50 [in. WG], Power source: 208/230 V, 60Hz Vertical, Horizontal right, Horizontal left Downflow External static pressure: 200Pa, 0.80 [in. WG], Power source: 208/230 V, 60Hz Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.
  • Page 16 External static pressure: 75Pa, 0.30 [in. WG], Power source: 208/230 V, 60Hz Vertical, Horizontal right, Horizontal left Downflow External static pressure: 125Pa, 0.50 [in. WG], Power source: 208/230 V, 60Hz Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.
  • Page 17 PVA-A12,18, 24, 30, 36, 42AA7 Vertical, Horizontal right, Horizontal left Downflow External static pressure: 200Pa, 0.80 [in. WG], Power source: 208/230 V, 60Hz Air filter Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.

  • Page 18: Sound Pressure Levels

    PVA-A12,18, 24, 30, 36, 42AA7 5. Sound Pressure Levels 5.1. Sound pressure level Multi-Position Aux.duct Front side 3-1/4ft. (1m) Measurement location Aux.duct Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.

  • Page 19: Nc Curves

    PVA-A12,18, 24, 30, 36, 42AA7 5.2. NC Curves Table 7. Model code 12, External static pressure 0.30, 0.50, 0.80 in WG. Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.
  • Page 20 PVA-A12,18, 24, 30, 36, 42AA7 Table 8. Model code 18, External static pressure 0.30, 0.50, 0.80 in WG. Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.
  • Page 21 PVA-A12,18, 24, 30, 36, 42AA7 Table 9. Model code 24, External static pressure 0.30, 0.50, 0.80 in WG. Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.
  • Page 22 PVA-A12,18, 24, 30, 36, 42AA7 Table 10. Model code 30, External static pressure 0.50 in WG. Table 11. Model code 36, External static pressure 0.30, 0.50, 0.80 in WG. Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.
  • Page 23 PVA-A12,18, 24, 30, 36, 42AA7 Table 12. Model code 42, External static pressure 0.30, 0.50, 0.80 in WG. Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.

  • Page 24: Dimensions

    PVA-A12,18, 24, 30, 36, 42AA7 6. Dimensions 70(2-13/16) 55(2-3/16) 470(18-9/16) 50.8(2) 525.5(20-3/4) 8(3/8) 55(2-3/16) 13.2(9/16) 24(15/16) Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.
  • Page 25 (19-1/8) (12-1/2) Model code 1,010.8 735.5 (39-13/16) (26-13/16) (32-7/16) (29) (14-3/16) 1,378 935.5 (54-1/4) (29-1/16) (37-9/16) (31-3/16) (18-3/16) 1511 798.5 1053 853.5 (59-1/2) (31-7/16) (41-1/2) (33-5/8) (22-3/16) Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.

  • Page 26: Outlines

    PVA-A12,18, 24, 30, 36, 42AA7 6.1. Outlines Unit:mm(in.) Clearance Area Length of Unit Width of Unit Horizontal Installation Vertical Installation Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.

  • Page 27: Wiring Diagram

    PVA-A12,18, 24, 30, 36, 42AA7 7. Wiring Diagram Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.
  • Page 28 Indoor and outdoor connecting wires are made with polarities, make wiring matching terminal numbers (S1, S2, S3). Symbols used in wiring diagram above are as follows: Use copper supply wire. Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.

  • Page 29: Refrigerant System Diagram

    Refrigerant flow in cooling Refrigerant flow in heating Thermistor TH2 Pipe temperature(Liquid) Refrigerant LIQUID pipe connection (Flare) Thermistor TH1 (Return Air temperature) Strainer (#50) Distributor with strainer (#50) Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.

  • Page 30: Heater Control

    When using the SPTB1 accessory, take special care when restarting power to the system to ensure that both the indoor unit and outdoor unit are powered up at the same time to avoid triggering a communication error. Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.
  • Page 31 Time delay can only be selected with MA controller. If use of a non-MA controller is desired, the time delay must first be selected with the MA controller. Then the non-MA controller can be attached and used. All delay times are approximate. The default time delay setting is 24 minutes. Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.
  • Page 32 ) > 2.7 °F [1.5 °C] not increasing faster than 0.9 °F [0.5°C] in 7 min EH2 ON EH1 OFF ⑥ ) < 0.9 °F [0.5°C] EH2 OFF Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.

  • Page 33: Fan Control

    Factory setting While the heater is on, the fan will operate at high speed regardless of the fan setting on the remote controller. Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.

  • Page 34: Cn24Relay-Kit-Cm3 (Optional Parts) Installation

    CN4Y as appropriate. CN4Y for FAN control (CN24RELAY-KIT-CM3) 3) Wiring • A basic connection method is shown below. Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.
  • Page 35 • Keep the length of the cable connecting to the circuit board of the indoor unit shorter than 10 meters (32 ft). • Longer than 10 meters (32 ft) could cause improper operation. • Use a transit relay when extending wiring such as remote wiring. Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.

  • Page 36: Humidifier

    Factory setting Remote controller Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.

  • Page 37: Erv (Energy Recovery Ventilation)

    If ERV control is effective when STOP, IDU doesn’t report fan status or PB error (Fan motor error). When fan speed setting by RC is "Auto", Fan speed is fixed to "HIGH". Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.

  • Page 38: Troubleshooting

    When connecting or disconnecting the connectors, hold the housing of the connector. DO NOT pull the lead wires. Lead wires 12.2. Self-check Refer to the installation manual that comes with each remote controller for details. Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.
  • Page 39 Abnormality such as overvoltage, voltage shortage, abnormal U9 / UH and synchronous signal to main circuit / current sensor error Others Other errors (refer to the technical manual for the outdoor unit) Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.

  • Page 40: Auto Restart Function

    Initial setting Not available Power failure auto restart Available Indoor unit operating average Indoor temperature detect Indoor unit’s internal sensor Remote controller’s internal sensor Not supported LOSSNAY Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.
  • Page 41 IMPORTANT If the system detects an error that could potentially create a safety hazard, the heater will not operate. Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.

  • Page 42: Self-Diagnosis Action Table

    5 Defective indoor there is extreme difference with actual controller board pipe <liquid> temperature, replace indoor controller board. Turn the power off, and on again to operate after check. Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.
  • Page 43 • Fan motor is defective. • Indoor controller board is defective. Defective outdoor fan control Overcharge of refrigerant 7 Defective refrigerant circuit (clogs) Bypass circuit of outdoor unit is defective Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.
  • Page 44 ˚C [194 ˚F] or more Open: -40 ˚C [-40 ˚F] or less have defect. refrigerant circuit 5. When no problems are found in 1– Defective indoor 4 above, replace the indoor unit control controller board board. Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.
  • Page 45 When “RC E3”or “ERC 00-66”is detecting it, judges different data to be abnormal transmission wire of displayed, noise may be causing 30 continuous times. (Error code: E5) remote controller. abnormality. Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.
  • Page 46 Replace the failed motor. b) When the number of rotations is detected to be looseness above the upper limit Motor failure for 30 seconds. Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.

  • Page 47: Troubleshooting By Inferior Phenomena

    Defective remote controller if LED 2 is blinking, remote controller is defective; if LED 2 is lit, connection failure of remote controller terminal block etc. has returned to normal. Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.

  • Page 48: Test Point Diagram

    • CNXC1: Connect to the indoor controller board • CNXA2: Connect to the indoor power board • CNXB2: Connect to the indoor power board • CNXC2: Connect to the indoor power board Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.

  • Page 49: Indoor Controller Board

    • SWE: Emergency operation • CN3C: Indoor - outdoor transmission (0 - 24 VDC) • SW1: Model selection • CN90: Wireless remote controller • SW2: Capacity setting Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.

  • Page 50: Trouble Criterion Of Main Parts

    -20 -10 0 10 20 30 40 50 (˚C) 30°C (86°F) 4.3 k" ˚F -4 14 32 50 68 86 104 122 40°C (104°F) 3.0 k" Temperature Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.

  • Page 51: Dc Fan Motor (Fan Motor/Indoor Controller Board)

    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. Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.

  • Page 52: Dc Fan Motor Measuring Points

    Model setting and capacity setting are memorized in the nonvolatile memory of the control p.c. board of the unit. Jumper Functions Setting by the dip switch and jumper wire Remarks wire Model settings for service board Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.
  • Page 53 : Short : Open Unit type setting There is no jumper (JP1) because these Model models have the cond./eva. temperature ther- without TH5 mistor (TH5) with TH5 Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.
  • Page 54 Setting by the dip switch and jumper wire Remarks wire Indoor controller Indoor controller board type board type setting factory shipment service parts : Short : Open Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.

  • Page 55: Disassembly Procedure

    2. Remove the blower panel (2 screws). 3. Remove the cover over the Return Air thermistor box and unplug the thermistor. 4. Pull out the thermistor holder and thermistor inside the box. Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.
  • Page 56 Next, slide the coil from the frame. Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.
  • Page 57 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. Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.
  • Page 58 (Fig.11). Unplug the motor and route the wire harness out of the enclosure. 4. Remove the (2) screws that secure the fan assembly and slide out. Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.
  • Page 59 This product is designed and intended for use in the residential, commercial and light-industrial environment. MITSUBISHI ELECTRIC US, INC. Toll Free: 800-433-4822 MEUS DOC# MD-1404-K011 Ver.4 September 2024 Specifications are subject to change without notice. © 2024 Mitsubishi Electric US, Inc.

This manual is also suitable for:

Pva-a12aa7Pva-a18aa7Pva-a24aa7Pva-a30aa7Pva-a36aa7Pva-a42aa7

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