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OPERATION PROCEDURE
9
22
<DEMAND>
The "DEMAND" is indicated when the demand input is
set by
the outside input function.
The indication is indicated for the group with demand
setting and the "DEMAND" indication flickers when the
demand signal is input.
In Case of Demand Setting
Contact your distributor or dealer of HITACHI for
details.
Flickers
In Case of Demand Signal Input
<FILTER>
Filter Clogging:
When the "FILTER" indication is indicated, it shows
that the air filter of the indoor unit is clogged. Clean
the air filter.
After cleaning, depress the "RESET" switch and the
"FILTER" indication is turned OFF.
Indication in Abnormal Conditions
<ABNORMAL>
Ref. No.
I.U. Add.
The Run lamp (Red lamp) is flickered when there is a
group in abnormal condition.
The "ALARM" is indicated on the LCD.
The " " indication of the group in abnormal condition is
flickered.
Depress the "GROUP" switch and select the group with
alarm, the indication of unit No., model code, alarm
code and the normal indication is repeatedly indicated
Model Code
Alarm Code
(There is a case that the model code may not be
indicated according to the unit model).
In case that multiple units are in abnormal conditions,
the above indication is indicated by turns.
Check the contents of the LCD indication and contact
your distributor or dealer of HITACHI for details.
<POWER FAILURE>
All the indications are disappeared.
In case of unit stoppage due to the power failure, the unit is not started again after the power
recovery. Perform the starting operation again.
In case of instant power failure within 2 seconds, the unit is automatically started again.
<ELECTRICAL NOISE>
All the indications are disappeared, and the unit operation may be stopped for the device
protection due to the electrical noise. Perform the starting operation again.
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