Temperature Protection Of Compressor Discharge (Odu P0) - Heat Controller A-VMH18DC-1 Service Manual

Service Manual

9.3.2.4 Temperature protection of compressor discharge (ODU P0)

Temperature protection of
compressor discharge
Check whether the
compressor discharge temp.
is more than 239°F (115°C)?
No
Check whether the wiring
connection is correct between
compressor discharge temp.
sensor and PCB according to
wiring diagram?
Yes
The discharge temp.
sensor may be
broken.
Check whether the
resistance of compressor
discharge temp. sensor is
right refer to the Appendix 2
Yes
Replace outdoor main board
VMH SerieS
Check whether there is
Yes
a refrigerant leak
Correct the wiring connection
No
No
Replace the compressor discharge temp. sensor
36
Heat Controller, Inc.
Yes
Stop leak and add refrigerant as needed