Mitsubishi Electric CRHV-P600YA-HPB Service Handbook page 156

[ IX Troubleshooting ]
7
High-voltage wiring
Clamps
2
Power wires
and ground
wire
Clamp 4
Clamp
8
1 screw
9
Water temperature
thermistor wiring
HWE1312A
Communication wires
3
and control wires
1 screw
<MAIN>
control box
1 screw
Discharge pipe covers
Clamps
1. Disconnect the connector of the low-voltage wiring connected
to the control board of the <MAIN> control box and then
remove the 3 clamps 1 securing the low-voltage wiring.
2. Disconnect the communication wires and control wires
connected to the terminal block.
Low-voltage
wiring
3. Disconnect the cooling fan connector (relay connector white),
belt heater wiring (CN502 white), solenoid coil wiring (CN501
white), and high-voltage switch wiring (CN801 yellow), and
then remove the 2 clamps 2 securing the high-voltage wiring.
Clamps
1
4. Remove the 1 clamp 3 securing the compressor power
wiring.
5. Disconnect the power wires and ground wire and then remove
the 1 clamp 4 securing the wiring.
1. Remove the 3 mounting screws of the <MAIN> control box
and then remove the <MAIN> control box.
1. Remove the 3 clamps securing the water temperature
thermistor.
2. Remove the pipe covers from the discharge pipes.
* The removed parts are required as they will be reattached
after replacement of the heat exchanger. Do not throw them
away.
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GB