Hitachi RAC-18WPC, Service Manual, Page: 39 / 43

How to run the product with the outdoor unit test switch
CH TEST SWIT
RAC-18/25WP
1. Turn on the outdoor terminal boards L and N (220-230 V AC).
If the indoor electrical parts is out of order and if you wish to run the outdoor unit
If you release your finger from the test switch within 1 sec to 5 sec after pressing the switch, the forced cooling operation starts.
※ (If you press the test switch for 5 or longer, the self-check diagnosis starts. In this case, turn the power off and start the procedure from 1 again.)
※
(For the initialization of the expansion valve, it may take 1 min until the operation starts.)
after the power turns on), confirm that the "LD301" changes to blinking 9 times (communication error).
2. Confirm that the "LD301" blinks once from the terminal side of the outdoor unit. Afterwards (when about 30 sec elapses
3. When the "LD301" is blinks 9 times, if you press the test switch, the "LD301" lights up.
4. When you press the test switch again for 1 sec or longer, the unit stops the operation.
sec
C
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