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Toshiba
4 Electric parts
replacement
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.)
No.
Exchange parts
name
Work procedure Remarks
Control board
Control board
Aluminum board (Q201)
Insulating sheet (Q300)
Heat release grease
Fan motor
Reactor lead
4-way valve coil
Temperature
sensor
Indoor power source
Electric control valve coil
Screw for fixing board
Power source terminal block
Screw for fixing element (7 screws)
Ground wire
Compressor
case
thermostat
Compressor
lead
Reactor
lead
+00A09-002_01EN_SVM_ALL_Air_to_Water.book Page 138 Monday, October 5, 2009 2:09 PM