Indoor Service Manual
Table Of Contents
- Cover
- Contents
- 1. 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
- 10. HUMIDIFIER CONTROL
- 11. ERV (ENERGY RECOVERY VENTILATION) CONTROL
- 12. TROUBLESHOOTING
- 12-1. Cautions on troubleshooting
- 12-2. Self-check function
- 12-3. Self-diagnosis action table
- 12-4. Troubleshooting by inferior phenomena
- 12-5. Test point diagram
- 12-6. Trouble criterion of main parts
- 12-7. Thermistor
- 12-8. DC Fan motor (FAN MOTOR/INDOOR CONTROLLER BOARD)
- 12-9. Functions of dip switch and jumper wire
- 13. DISASSEMBLY PROCEDURE
- Back Cover
24
Specications are subject to change without notice. © 2016 Mitsubishi Electric US, Inc.
The following section describes installation of the External Heater Adapter that connects to PVA-A AA7
series indoor unit. This products is the special wiring parts to drive an electric heater with the air conditioner.
(1) Parts list
Check that the following parts are included in the package.
1) External output cable..................................................................... 2 in total
Two types of cables with different connectors are included.
2) Panel heater connector.................................................................. 3 in total
White: 3
(2) Connection to the indoor unit
Use the cables that fit the connectors on the indoor unit control board.
1) External output cable
This cable is used to connect a relay circuit for an interlocked operation with either an electric or a panel heater.
Select the heater output pattern (1st = CN24-1 or 2nd = CN24-2) to use, and connect the cable to the connector
on the indoor unit control board that corresponds to the selection.
2) Panel heater connector
This connector is used to perform an interlocked operation with a panel heater. Depending on the indoor unit control board
specification, connect the cable to CN4Y as appropriate.
3) Relay
9-3. CN24RELAY-KIT-CM3 (Optional Parts) installation
14
The following section describes installation of the External Heater Adapter that connects to PEA-A AA
series indoor unit. This products is the special wiring parts to drive an electric heater wi th the air conditioner.
(1) Parts list
Check that the following par ts are included in the package.
1) External output cable (with a yellow connector).............................2 in total
Tw o types of cables with differen t connectors are included.
2) Panel heater connector........... ................................................... .... 3 in total
White: 1
Green: 2 (2 types)
(2) Connection to the indoor unit
Use the cables that fit the connectors on the indoor unit control board.
1) External output cable (with a yellow connector)
This cable is used to connect a rela y circuit for an interlocked operati on with either an electric or a panel heater.
C onnect the cable to CN24 on the indoor unit control board.
2) Panel heater co nnector (with a white connector)
This connector is used to perform an interlocked operation
with a p anel heater. Depending on the indoor unit
control board specification , connect the cable to CN4Y as appropriate
CN4Y for FAN control
(CN24RELAY-KIT-CM3)
<Image>
6-3. PAC-YU25HT (Optional Parts) installation
(3) Wiring
A basic connection method is shown below.
CN24
X
X
Remote control board Relay circuit
Adapter
Indoor unit
control board
Electric Heater
power source
Electric Heater
or panel
heater
Red 1
White 2
Preparations in the field
Maximum cable length
is 10 m (32ft)
White
White 1
(applicable only when a panel
heater is connected)
3
CN4Y
White