Toshiba HWS-803XWHM3-E Service Manual page 165

Exchange parts
No.
name
4 Electric parts
replacement
Work procedure
1. Control board
1) Perform the step 1-1.
WARNING
For 1 minute after the power is turned off, do not
disassemble the inverter to prevent an electric
shock.
2) Remove the connector connected to the control
board.
(Hydro power source, temperature sensor, electric
control valve coil, 4-way valve coil, compressor
case thermostat, fan motor)
* Remove the connector by releasing the lock in the
housing.
3) Remove the lead cable connected to the control
board. (Torque at tightening is 1.47 ±0.1N• m)
Compressor lead U: CN200 Red
V: CN201 White
W: CN202 Black
Remove the power source cable from the power
source terminal block.
(Torque at tightening is 2.5 ±0.1N• m)
4) Remove the ground wire of the control board.
(Truss B tight screw Ø4 × 6, 1 screw)
5) Remove the fixed screws of the control board.
(Collar screw for fixing element Ø3 × 16, 7 screws,
Pan S-tight screw for fixing the board Ø3 × 20, 1
screw)
6) Remove the control board.
(Supporter 5 positions)
NOTE
Removing the control board may be difficult due to the
heat release grease for the heat sink.
7) Attach a new control board.
NOTE
• Be careful for not taking the compressor lead V:
CN201 White for the reactor lead CN05 or 06
White.
(The compressor lead has a transparent sleeve at
its ring terminal. The reactor lead ring terminal does
not have sleeve.)
• Be sure to attach the aluminium board (Q201) and
the insulating sheet (Q300).
(Applying beforehand a bit of heat release grease
to the back side of the insulating sheet can easily
paste the sheet to the heat sink.)
Control board
Compressor
case
thermostat
Temperature
sensor
Electric control valve coil
Screw for fixing board
Power source terminal block
Control board
164
Remarks
Compressor
Reactor lead
lead
Fan motor
Ground wire
Reactor
lead
4-way valve coil
Indoor power source
Screw for fixing element (7 screws)
Aluminum board (Q201)
Insulating sheet (Q300)
Heat release grease