How To Run The Product With The Outdoor Unit Test Switch - Hitachi RAC-18WEC Service Manual

How to run the product with the outdoor unit test switch

If the indoor electrical parts is out of order and if you wish to run the outdoor unit
1. Turn on the outdoor terminal boards L and N (220-230 V AC).
2. Confirm that the "LD301" blinks once from the terminal side of the outdoor unit. Afterwards (when about 30 sec elapses
after the power turns on), confirm that the "LD301" changes to blinking 9 times (communication error).
3. When the "LD301" is blinks 9 times, if you press the test switch, the "LD301" lights up.
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
※(For the initialization of the expansion valve, it may take 1 min until the operation starts.)
4. When you press the test switch again for 1 sec or longer, the unit stops the operation.
RAC-18/25/35WEC
RAC-10/14WECI
TEST SWIT
sec or longer, the self-check diagnosis starts. In this case, turn the power off and start the procedure from 1 again.)
CH
RAC-50WEC
RAC-20WECI