Hitachi RAK-15QPC Service Manual page 69

Forced cooling operation (Only single connection)
The cooling operation can be forcibly performed for collecting refrigerant and inspecting failures.
Do not perform the forced cooling operation continuously for long hours,
because the compressor continues to be in operational status, regardless of room temperature.
＜How to start the operation＞
・The operation of the unit should be stopped.
・
Press and hold the "Temporary operation SW"
shown in the right figure for 5 sec.
＜How to stop the operation＞
・Press and hold the "Temporary operation SW" again.
Or stop the operation using the remote controller.
※During the forced cooling operation,
the "Timer indicator" blinks twice.
Temporary operation switch
When performing the forced cooling operation, turn the power off once. If you press and hold
the switch for 5 sec or longer, the forced cooling operation starts. To stop the forced cooling
operation, press the switch once again or stop the operation using the remote controller.
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