Hitachi RAM-50CNHZ2, Service Manual, Page: 14 / 107

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INDOOR UNIT INDICATORS
OPERATION INDICATOR
RAS-30CNHZ2
TEMPORARY SWITCH
Use this switch to start and stop when the remote controller does not work.
SELECTOR SWITCH
AUTO RESTART SWITCH
●
In the event of power failure, the air conditioner will restart automatically in
the previously selected mode once the power is restored.
●
In the event of power failure during TIMER operation, the timer will be reset
and the unit will begin or stop operating under a new timer setting.
NORMAL
Use this switch in order to prevent the unit from switch ON after the power
supply resuming from the power failure.
SELECTOR SWITCH IS PRESET AT NORMAL POSITION.
NORMAL
AUTO
RESTART
TEMPORARY
SWITCH
OPERATION LAMP
This lamp lights during operation.
The OPERATION LAMP flashes in the following cases
during heating.
(1) During preheating
For about 2–3 minutes after starting up.
(2) During defrosting
Defrosting will be performed about 50 minutes when
frost forms on the heat exchanger of the outdoor unit,
for 5–10 minutes each time.
FILTER LAMP
When the device is operated for a total of about 100 hours,
the FILTER lamp lights to indicate that it is time to clean
the filter. The lamp goes out when the POWER SWITCH
set to OFF and ON again.
SIGNAL RECEIVER
There will be a beep sound when this receiver receives
signal from remote controller.
TIMER LAMP
This lamp lights when the timer is working.
CAUTION
1. Turn on the circuit breaker first before switching the auto restart switch to
AUTO. Failure to do so may result the unit to run at previous preset mode or
cannot operate.
2. Operation of indoor units are as mentioned on page 10 “Combination of
Operations. (Priority of operation is for unit no. 2)
!
Indoor unit 1 Indoor unit 2
Outdoor unit