Removal and Reassembly _ 25
Part
Figure
Description
Replacement of the
main PCB
1. Remove the back cover and unfasten the
screws that hold the main PCB in place.
2. Remove the PCB cover inside.
Remove the wire harness connector which
is connected to the PCB.
Remove the reactor wire.
3. Replace the main PCB.
You cannot remove the PCB separately
because urethane is used for water
proofing.
4
Check Points for Troubleshooting
1. Check whether there is any error in applying the power.
2. Check the voltage between the DC 5V and GND terminals.
3. If an error occurs when there is no characteristic error in the electric harnesses, check
these points:
3E error: The resistance of motor(U-V/V-W/W-U) is 5 Ω
HE/HE1 error: The resistance of heater(for 1900W unit) is 27 Ω
DE1 error: The resistance of door switch is 140 to 145 Ω
HE/HE1 error: The resistance of thermostat is 0 Ω
5E error: The resistance of drain motor is 400 Ω
4E error: The resistance of water valve is 4.4 kΩ
Reassembly is in the reverse order of the removal.
