Mitsubishi Electric PURY-RP200 Service Handbook page 241

[ IX Troubleshooting ]
(4) SV4a - 4d
1) Depending on the conditions during Cooling-only operation, at least one of the solenoid valves among SV4a through 4d turns
on. Check for proper operation on the LED and by listening for the operation sound of the solenoid valve.
2) During Heating-only operation, SV4a through 4d all turn on. Check for proper operation on the LED and by listening for the
operation sound of the solenoid valves.
3) Depending on the conditions during Cooling-main or Heating-main operation, at least one of the solenoid valves among SV4a
through 4d turns on. Check for proper operation on the LED and by listening for the operation sound of the solenoid valve.
4) The diagram on the next page shows the refrigerant flow. This diagram shows the flow of the high-temperature (high-pressure)
gas refrigerant in the Cooling-only and Cooling-main modes and the flow of the low-temperature gas/liquid refrigerant in the
Heating-only and Heating-main modes. Refer to the refrigerant circuit diagram. Solenoid valves turns on and off according to
such factors as the capacity of the indoor units in operation and outside temperature. Check the LED. Remove the SV coil,
open the lid, and check the plunger. The type of pin face wrench that is listed in the service parts list is required to perform
this task.
HWE10020
- 232 -
GB