Mitsubishi Electric PQHY-P200YLM-A Service Handbook page 406

[ IX Troubleshooting ]
1. Explained below are procedures for replacing water-cooled heat exchanger assembly parts.
2. Applicable models
• PQRY-P550, P600YLM-A
3. Service parts list
4. Procedures
*Precautions for starting replacement
• Check that the main power supply is OFF.
• Check that no refrigerant is in the heat source unit.
Remove each part according to the 1)-4) procedures before replacing service parts.
Mount the removed parts back in place in a reversed procedures of 1)-4) after replacing service parts.
1) To remove the control box and the wire
Remove the screw that is fixed to
the Service Panel (total 17 places),
and remove the Service Panel (Front Panel).
Remove the control box.
HWE15060
Disconnect the wiring from the circuit board
as shown in the figure.
Remove the pipe cover and cable tie (total 3 places),
and then disconnect the wire and sensor (TH7,TH8).
TH8
TH7
- 397 -
Remove the screw that is fixed to the I/O box (total 2 places),
and remove the I/O box.
Remove the wire from cable strap on the Frame M.
Backside of the Frame M (total 5 places)
Frame M (total 4 places)
GB