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No.
4
Part name
Exchange of
electric parts
Procedure
1. Control P.C. board
1) Carry out work of 1 of
1
.
WARNING
Never disassemble the inverter for 1 minute
after power has been turned off because an
electric shock may be caused.
2) Remove the connectors connected to the
control P.C. board.
(Indoor power supply, temperature sensors,
PMV coil, 4-way valve coil, compressor case
thermo, fan motor)
∗ Unlock the lock of the housing part and
then remove the connectors.
3) Remove the lead wires connected to the
control P.C. board.
(Torque at tightening time: 1.47 ± 0.1N•m)
Compressor lead
U: CN200 Red
V: CN201 White
W: CN202 Black
Reactor lead
Relay connector: 2 positions
Remove the power wire from the power
supply terminal block.
(Torque at tightening time: 2.5 ± 0.1N•m)
4) Remove the earth wire from the control P.C.
board. (Truss B tight screw Ø4 × 6, 1 pc.)
5) Remove the fixing screws of the control P.C.
board.
(Screw with collar for fixing element Ø3 × 16,
7 pcs. Pan S tight screw for fixing P.C. board
Ø3 × 20, 1 pc.)
6) Remove the control P.C. board.
(Supporter: 5 positions)
NOTE:
It is difficult to take out it because of radiator
grease for heat sink.
7) Mount a new control P.C. board.
NOTE:
Do not forget to attach the aluminum plate (Q201)
and the insulating sheet (Q300).
(Applying a little of radiator grease at the rear
surface of the insulating sheet in advance to
adhere to the heat sink makes easy the work.)
Remarks
Screw for fixing P.C. board
Control P.C. board Insulating sheet (Q300)
Aluminum plate (Q201)
Power supply terminal block
Power supply terminal block
Radiator
Radiator
grease
grease
Screw for fixing element (7 positions)
Screw for fixing element (7 positions)
PMV coil
Indoor power supply
4-way valve coil
4-way valve coil
4-way valve coil
Earth wire
Earth wire
Control
P.C. board
Fan motor
Bundling band
(Reactor lead)
Compressor lead
Reactor lead wires
Reactor lead wires
(White,Charcoal gray)
(White,Charcoal gray)
Temperature
Temperature
sensor
sensor
Compressor
Compressor
case thermo
case thermo
Power supply terminal block
Radiator
grease
Screw for fixing element (7 positions)
Earth wire
Reactor lead wires
(White,Charcoal gray)
Temperature
sensor
Compressor
case thermo
Relay connector:
2 positions
(1 at rear side)