112
OPERATING PROCEDURE
PHOTOS
4. Electrical box disassembly procedures:
(1) Remove the side panel (Refer to 1)
(2) Remove the top panel (Refer to 1)
(3) Disconnect the following wires from the
multi controller board.
• Thermistor (discharge temperature detection):TH1
• Thermistor (Low pressure saturated temperature
detection):TH2
• Thermistor (pipe temperature, defection judging
defrost):TH5
• Thermistor (outdoor temperature detection): TH6
• High-pressure sensor: 63HS (discharge pressure
detection)
• Expansion valve: SLEV
(4) Disconnect the following wires from the power supply
board:
• Fan motor: MF1 and MF2
• Solenoid coil: SV1
• 4-way coil: 21S4
• Crankcase heater: CH
Pull wires out of the electrical box after disconnecting
them.
(5) After removing the connector cover, remove the com-
presser wire and the inner thermostat terminal.
(6) Remove the electrical box screw (1 pc : 4
o
10).
(7) Remove the valve bed screws from the right side of
the valve bed (2 pcs : 4
o
10).
(8) Remove the electrical box after slightly loosening the
rear panel. The electrical box is held by two claws on
the left and one on the right.
5. Solenoid valve coil and 4-way valve coil
disassembly procedures:
(1) Remove the side panel (Refer to 1).
(2) Remove the top panel (Refer to 1).
(3) Remove the electrical box (Refer to 3).
(4) Remove coil screws (Solenoid valve: 1 pc M4x6;
4-way valve: 1 pc M5x6), and remove the solenoid
coil (SV1) and 4-waycoil (21S4) wires from the power
supply board.
Note: The 4-way valve coil screw cannot be
removed by using a screwdriver; an adjustable
or fixed wrench must be used.
Photo 4
Photo 5
Power supply board
Electric box
screw
Rear panel
Electrical box
Multi-controller
board
Valve bed
screws
Connector cover
Valve bed
4-way valve
4-way
valve coil
Solenoid valve
coil
OC183E--4.qxp 10.5.6 0:54 PM Page 112
