Hitachi RAS-10XH1 Service Manual page 99

Operation with the forcible cooling switch
The product can be forcibly made to perform cooling when you wish to collect the refrigerant or do some troubleshooting.
The compressor will be in operation regardless of the room temperature. Therefore avoid running the product continuously for
a long time.
< How to start the operation >
・Stop the product.
・Open the front panel of the indoor unit and hold down
the "forcible cooling switch" of the display for 5 seconds.
< How to stop >
・Open the front panel of the indoor unit and hold
down the "forcible cooling switch" of the display
for 5 seconds.
※During forcible cooling, the "timer lamp" will
blink twice.
Running the indoor unit in isolation
This operation allows the indoor unit to run in isolation.
If communications cannot be established between the indoor unit and the outdoor unit, the product normally enters
self-diagnosis display mode (the timer lamp blinks 12 times), so that the indoor unit cannot start in isolation.
To make an operation check on the indoor unit in isolation, use this operation.
< How to make settings >
・Set the remote control unit to the stop screen.
・Turn off the power and turn it back on 5 seconds later.
・Hold down the "wind speed" button on the remote control
unit for 5 seconds.
※Caution: After turning on the power, do not perform any
other remote control operation.
Setting complete
You can perform any operation you like
by remote control. However, the power
relay will remain off to ensure safety.
< Canceling the settings >
・Stop the product and turn off the power.
Emergency operation (forcible cooling) switch
For an emergency operation, turn off the power and then turn it back on. Holding the
button down for more than 5 seconds will initiate forcible cooling. To abort it, press
the switch again or stop the operation by remote control.
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RAR-3R5