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Mitsubishi Electric PVA-A12AA7 Service Manual
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Mitsubishi Electric PVA-A12AA7 Service Manual

Mitsubishi Electric PVA-A12AA7 Service Manual

Multi-position air handler
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SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
Air-Conditioners
SERVICE MANUAL
Series PVA
Model name
Model name
<Indoor unit>
<Indoor unit>
PVA-A12, 18, 24, 30, 36, 42AA7
PVA-A30AA4
PVA-A36AA4
Multi-Position Air Handler
PVA-A42AA4
INDOOR UNIT
P-SERIES
2015

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Summary of Contents for Mitsubishi Electric PVA-A12AA7

  • Page 1 P-SERIES 2015 SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS Air-Conditioners SERVICE MANUAL Series PVA Model name Model name <Indoor unit> <Indoor unit> PVA-A12, 18, 24, 30, 36, 42AA7 PVA-A30AA4 PVA-A36AA4 Multi-Position Air Handler PVA-A42AA4 INDOOR UNIT...

  • Page 3: Table Of Contents

    1-2. Cautions related to new refrigerant ........................... 2 2. PART NAMES AND FUNCTIONS ........................... 3 3. SPECIFICATION ................................4 4. FAN PERFORMANCE AND CORRECTED AIR FLOW ....................7 PVA-A12AA7 ..................................7 PVA-A18AA7 ..................................8 PVA-A24AA7 ..................................9 PVA-A30AA7 .................................. 10 PVA-A36AA7 ..................................

  • Page 4: Safety Precaution

    · Check that cylinder for R410A on the market is syphon type. · Charging should be performed with the cylinder of syphon stood vertically. (Refrigerant is charged from liquid phase.) Specifications are subject to change without notice. © 2022 Mitsubishi Electric US, Inc.

  • Page 5: Part Names And Functions

    · Only for R410A · Top of cylinder (Pink) · Cylinder with syphon Refrigerant recovery equipment PART NAMES AND FUNCTIONS Indoor Unit • (1) Vertical (2) Horizontal Right inlet outlet Specifications are subject to change without notice. © 2022 Mitsubishi Electric US, Inc.

  • Page 6: Specification

    200Pa (0.80 in.WG) 34-38-42 Drain pipe mm (in.) 19.05 (3/4) FPT Dimensions mm (in.) 432 (17) mm (in.) 548 (21-5/8) mm (in.) 1275 (50-1/4) kg (lbs) Weight 51 (113) Specifications are subject to change without notice. © 2022 Mitsubishi Electric US, Inc.
  • Page 7 200Pa (0.80 in.WG) 37-41-45 Drain pipe mm (in.) 19.05 (3/4) FPT Dimensions mm (in.) 635 (25) mm (in.) 548 (21-5/8) mm (in.) 1511 (59-1/2) kg (lbs) Weight 78 (172) Specifications are subject to change without notice. © 2022 Mitsubishi Electric US, Inc.
  • Page 8 200Pa (0.80 in.WG) 39-43-47 Drain pipe mm (in.) 19.05 (3/4) FPT Dimensions mm (in.) 635 (25) mm (in.) 548 (21-5/8) mm (in.) 1511 (59-1/2) kg (lbs) Weight 78 (172) Specifications are subject to change without notice. © 2022 Mitsubishi Electric US, Inc.

  • Page 9: Fan Performance And Corrected Air Flow

    High [0.70] [0.70] [0.60] [0.60] Middle Middle [0.50] [0.50] [0.40] [0.40] [0.30] [0.30] [247] [353] [494] [247] [353] [494] Airflow rate (m /min)[cfm] Airflow rate (m /min)[cfm] Specifications are subject to change without notice. © 2022 Mitsubishi Electric US, Inc.

  • Page 10: Pva-A18Aa7

    [0.70] [0.60] [0.60] Middle Middle [0.50] [0.50] [0.40] [0.40] [0.30] [0.30] [459] [530] [706] [777] [459] [530] [706] [777] Airflow rate (m /min)[cfm] Airflow rate (m /min)[cfm] Specifications are subject to change without notice. © 2022 Mitsubishi Electric US, Inc.

  • Page 11: Pva-A24Aa7

    [0.70] [0.60] [0.60] Middle Middle [0.50] [0.50] [0.40] [0.40] [0.30] [0.30] [530] [706] [883] [1024] [530] [706] [883] [953] Airflow rate (m /min)[cfm] Airflow rate (m /min)[cfm] Specifications are subject to change without notice. © 2022 Mitsubishi Electric US, Inc.

  • Page 12: Pva-A30Aa7

    [0.70] [0.60] [0.60] Middle Middle [0.50] [0.50] [0.40] [0.40] [0.30] [0.30] [530] [706] [883] [1024] [530] [706] [883] [953] Airflow rate (m /min)[cfm] Airflow rate (m /min)[cfm] Specifications are subject to change without notice. © 2022 Mitsubishi Electric US, Inc.

  • Page 13: Pva-A36Aa7

    [0.60] Middle Middle [0.50] [0.50] [0.40] [0.40] [0.30] [0.30] [706] [883] [1059] [1236] [1306] [706] [883] [1059] [1236] [1306] Airflow rate (m /min)[cfm] Airflow rate (m /min)[cfm] Specifications are subject to change without notice. © 2022 Mitsubishi Electric US, Inc.

  • Page 14: Pva-A42Aa7

    [0.60] Middle Middle [0.50] [0.50] [0.40] [0.40] [0.30] [0.30] [918] [1059] [1236] [1412] [1518] [918] [1059] [1236] [1412] [1518] Airflow rate (m /min)[cfm] Airflow rate (m /min)[cfm] Specifications are subject to change without notice. © 2022 Mitsubishi Electric US, Inc.

  • Page 15: Pva-A12, 18, 24, 30, 36, 42Aa7

    PVA-A12, 18, 24, 30, 36, 42AA7 Air Filter Power Source: 60Hz, 208/230V [0.100] [0.080] [0.060] [0.040] [0.020] [353] [706] [1059] [1412] [1766] Air ow rate (m /min)[CFM] Specifications are subject to change without notice. © 2022 Mitsubishi Electric US, Inc.

  • Page 16: Sound Pressure Levels

    SOUND PRESSURE LEVELS 5-1. Sound pressure level Multi-Position 5-2. NC curves PVA-A18AA7 PVA-A12AA7 Specifications are subject to change without notice. © 2022 Mitsubishi Electric US, Inc.
  • Page 17 PVA-A24AA7 PVA-A30AA7 Specifications are subject to change without notice. © 2022 Mitsubishi Electric US, Inc.
  • Page 18 PVA-A36AA7 PVA-A42AA7 Specifications are subject to change without notice. © 2022 Mitsubishi Electric US, Inc.

  • Page 19: Outlines & Dimensions

    70(2-13/16) 70(2-13/16) 70(2-13/16) 55(2-3/16) 55(2-3/16) 55(2-3/16) 470(18-9/16) 470(18-9/16) 50.8(2) 50.8(2) 525.5(20-3/4) 525.5(20-3/4) 8(3/8) 8(3/8) 470(18-9/16) 50.8(2) 525.5(20-3/4) 8(3/8) 55(2-3/16) 55(2-3/16) 13.2(9/16) 13.2(9/16) 55(2-3/16) 13.2(9/16) 24(15/16) 24(15/16) 24(15/16) Specifications are subject to change without notice. © 2022 Mitsubishi Electric US, Inc.
  • Page 20 609.6(24) 609.6(24) Specifications are subject to change without notice. © 2022 Mitsubishi Electric US, Inc.

  • Page 21: Wiring Diagram

    TERMINAL BLOCK (INDOOR/OUTDOOR CONNECTING LINE) LED(POWER SUPPLY) LED1 LED(REMOTE CONTROLLER SUPPLY) LED2 TERMINAL BLOCK TB15 (REMOTE CONTROLLER TRANSMISSION LINE) LED(TRANSMISSION INDOOR-OUTDOOR) LED3 RADIO FREQUENCY INTERFACE FOR RF THERMOSTAT Specifications are subject to change without notice. © 2022 Mitsubishi Electric US, Inc.

  • Page 22: Refrigerant System Diagram

    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) Specifications are subject to change without notice. © 2022 Mitsubishi Electric US, Inc.

  • Page 23: Heater Control

    • To: Set point temperature • T RA : Return Air temperature • X: Time delay (Selectable. Default is 24 min. Selectable to 14, 19, or 29 min) Specifications are subject to change without notice. © 2022 Mitsubishi Electric US, Inc.
  • Page 24 X min X min X min ① ① EH1 OFF (To -T ) < 0.9 °F [0.5°C] ⑥ ④ EH2 OFF ⑤ X min X min ⑤ Specifications are subject to change without notice. © 2022 Mitsubishi Electric US, Inc.

  • Page 25: Fan Control

    DEFROST or ERROR Very Low Very Low ○ Fan Control STOP Remote Controller Setting Remote Controller Setting Remote Controller Setting *3 Refer to the Installation Manual for function settings. Specifications are subject to change without notice. © 2022 Mitsubishi Electric US, Inc.

  • Page 26: Cn24Relay-Kit-Cm3 (Optional Parts) Installation

    White CN4Y White Electric Heater or panel heater (applicable only when a panel heater is connected) Preparations in the field Maximum cable length is 10 m (32ft) Specifications are subject to change without notice. © 2022 Mitsubishi Electric US, Inc.
  • Page 27 Keep the length of the cable connecting to the circuit board of the indoor unit shorter than 10 meters (32ft). Longer than 10 meters (32ft) could cause improper operation. Use a transit relay when extending wiring such as remote wiring. Specifications are subject to change without notice. © 2022 Mitsubishi Electric US, Inc.

  • Page 28: Humidifier Control

    Maximum cable length is 10m(32ft) Rated voltage:12VDC Power consumption:1W or less Humidistat:Minimum applicable load 1mA at DC Contact rating voltage:15VDC or more Contact rating current:0.1A or more Specifications are subject to change without notice. © 2022 Mitsubishi Electric US, Inc.

  • Page 29: Erv (Energy Recovery Ventilation) Control

    Maximum cable length is 10m(32ft) Rated voltage:12VDC Power consumption:1W or less ERV switch:Minimum applicable load 1mA at DC Contact rating voltage:15VDC or more Contact rating current:0.1A or more Specifications are subject to change without notice. © 2022 Mitsubishi Electric US, Inc.

  • Page 30: Troubleshooting

    3 When connecting or disconnecting the connectors, hold the housing of the connector. DO NOT pull the lead wires. 3 When connecting or disconnecting the connectors, hold the housing of the connector. DO NOT pull the lead wires. Lead wires Specifications are subject to change without notice. © 2022 Mitsubishi Electric US, Inc.

  • Page 31: Self-Check Function, Function Table

    • OPE lamp is blinking. • The buzzer makes a short ping sound. Note: Operation is not possible for about 30 seconds after cancellation of function selection. (Correct operation) Specifications are subject to change without notice. © 2022 Mitsubishi Electric US, Inc.
  • Page 32 * If a heater is installed in the duct, do not use Panel heater connector. By doing so, the fan will turn off when the heater is on, which may result in fire. Specifications are subject to change without notice. © 2022 Mitsubishi Electric US, Inc.

  • Page 33: Self-Diagnosis Action Table

    2 Defective indoor controller 2 Operate with connector (CN4F) short-circuit- 2 Constantly detected during operation. board Refer to 12-5. Replace indoor controller board if abnormality reappears. (5701) Specifications are subject to change without notice. © 2022 Mitsubishi Electric US, Inc.
  • Page 34 Note 3) It takes at least 27 minutes to detect abnormality. Note 4) It excludes the period of defrosting (Detection restarts when defrosting mode is over) Heating range : 3˚C (5.4˚F) (TH5-TH1) Specifications are subject to change without notice. © 2022 Mitsubishi Electric US, Inc.
  • Page 35 When “RC E3”or “ERC 00-66”is dis- different data to be abnormal 30 played, noise may be causing abnormali- continuous times. (Error code: E5) Specifications are subject to change without notice. © 2022 Mitsubishi Electric US, Inc.
  • Page 36 3 Motor failure 30 seconds. b) When the number of rotations is detected to be above the upper limit for 30 seconds. Specifications are subject to change without notice. © 2022 Mitsubishi Electric US, Inc.

  • Page 37: Troubleshooting By Inferior Phenomena

    LED2 is blinking, remote controller is defective; if LED2 is lit, connection failure of remote controller terminal block etc. has returned to normal. Specifications are subject to change without notice. © 2022 Mitsubishi Electric US, Inc.

  • Page 38: Test Point Diagram

    1 - 6.5VDC (with the fan in operation) (Same with the voltage between 6 (+) and 4 (-) of CNMF) CNXB1 CNXC1 CNXA1 CNMF (*1) PC51 (*1) (*1) Specifications are subject to change without notice. © 2022 Mitsubishi Electric US, Inc.
  • Page 39 Connect to the indoor po wer board CNXC1 Connect to the indoor po wer board CNER ER V controll CN2C ER V input CN25 Humidity conrol Humidity input Specifications are subject to change without notice. © 2022 Mitsubishi Electric US, Inc.

  • Page 40: Trouble Criterion Of Main Parts

    (˚C) -20 -10 0 10 20 30 40 50 30°C (86°F) 4.3 k" -4 14 32 50 68 86 104 122 ˚F 40°C (104°F) 3.0 k" Temperature Specifications are subject to change without notice. © 2022 Mitsubishi Electric US, Inc.

  • Page 41: Dc Fan Motor (Fan Motor/Indoor Controller Board)

    6 - pin 4 150kΩ 143kΩ pin 7 - pin 4 O.L. O.L. *To measure the resistance, connect the negative (-) end of the tester to pin 4. Specifications are subject to change without notice. © 2022 Mitsubishi Electric US, Inc.

  • Page 42: Functions Of Dip Switch And Jumper Wire

    There is no jumper (JP1) because these models Unit type Without TH5 have the cond./eva. temperature thermistor (TH5). setting With TH5 Indoor Indoor controller board type controller Factory shipment board type Service parts setting Specifications are subject to change without notice. © 2022 Mitsubishi Electric US, Inc.

  • Page 43: Disassembly Procedure

    DISASSEMBLY PROCEDURE 13-1. Control box Exercise caution when removing heavy parts. 1. Remove the Electric panel (2 screws) Fig. 1 Specifications are subject to change without notice. © 2022 Mitsubishi Electric US, Inc.

  • Page 44: Thermistor (Return Air)

    3. Remove the cover over the Return Air thermistor 1:15 CHECKED box and unplug the thermistor. DESIGNED 4. Pull out the thermistor holder and thermistor inside the box. Fig. 3 Specifications are subject to change without notice. © 2022 Mitsubishi Electric US, Inc.

  • Page 45: Coil Assembly

    Next, slide the coil from the frame. Fig. 6 Fig. 7 Specifications are subject to change without notice. © 2022 Mitsubishi Electric US, Inc.
  • Page 46 5. Remove the plate covering the coil assembly to access the thermistors. Fig. 8 6. Remove lower and side drain pan. Fig. 9 Specifications are subject to change without notice. © 2022 Mitsubishi Electric US, Inc.

  • Page 47: Blower/Fan Assembly

    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. Fig. 11 Specifications are subject to change without notice. © 2022 Mitsubishi Electric US, Inc.
  • Page 48 Please be sure to put the contact address/telephone number on this manual before handing it to the customer. MITSUBISHI ELECTRIC US, INC. www.mitsubishielectric-usa.com Toll Free: 800-433-4822 MEUS DOC# MD-1404-K011 Ver.3, March 2022 Specifications are subject to change without notice. © 2022 Mitsubishi Electric US, Inc.

This manual is also suitable for:

P seriesPva-a18aa7Pva-a24aa7Pva-a30aa7Pva-a36aa7Pva-a42aa7

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