Hitachi RAK35NH4 Instruction Manual page 5

INDOOR UNIT INDICATORS
HITACHI
OPERATION INDICATOR
TEMPORARY SWITCH
Use this switch to start and stop when the remote controller does not work.
By pressing the temporary switch, the operation is done in automatic mode.
FILTER LAMP
When the device is operated for a total of about 200
hours, the FILTER lamp lights indicates that it is time to
clean the filter. The lamp goes out when the POWER
SWITCH set to OFF and ON again.
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 once an hour
when frost forms on the heat exchanger of the
outdoor unit, for 5–10 minutes each time.
TIMER LAMP
This lamp lights when the timer is working.
This figure shows the opening condition of
front panel. Refer to page 24 in relation to
how to open or close the front panel.
TEMPORARY SWITCH
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TEMPORARY SWITCH