Hitachi UTOPIA RASC Series Installation And Operation Manual page 20

INSTALLATION OF
REMOTE CONTROLLER
5.1.7. INDICATIONS UNDER NORMAL CONDITIONS
Thermo-controller
•
When the thermo-controller is operated, the fan speed changes to LOW, and the indication
remains unchanged. (Only in heating mode)
Defrosting
•
When the system is operating in the defrost mode, the DEFROST indication is shown.
The indoor fan slows down or stops (depending on the setting selected).
The louver is fixed horizontally at 35°. However, the LCD indication is still activated.
(The figure shows the DEFROST setting).
When the unit stops during the defrosting operation, the RUN indicator (red) goes out.
However, the operation continues to show the DEFROST indication, and the unit starts up
once the defrost operation is finished.
Filter
•
Clogged filter: The "FILTER" indication appears when the filter is clogged with dust, etc.
Clean the filter: Press the RESET switch after cleaning the filter. The "FILTER" indication
goes out.
5.1.8. INDICATIONS UNDER ABNORMAL CONDITIONS
Disfunction
•
The RUN indicator (red) blinks.
The ALARM indicator appears on the liquid crystal display.
The indoor unit number, the alarm code and the model code are indicated on the liquid
crystal display. If several indoor units are connected, the above items are indicated one by
one for each of them.
Make a note of the indications and contact your HITACHI service provider.
Power failure
•
All the indications disappear.
If the unit stops because of a power failure, it will not restart even when the power returns.
Perform the start-up operations again.
If the power failure lasts less than 2 seconds, the unit will automatically start up again.
Electrical noise
•
The indications may all be OFF and the unit stopped. This is because the microcomputer
has been activated in order to protect the unit from electrical noise.
Indoor unit number
Alternating
Model code:
indication
every second
Model code
Indication
H
P
Multi (Set-Free)
F
Only cooling
C
E
Twin, triple & Quad

PMML0140A rev.1 - 07/2009
Alarm code
Alarm code
No. of indoor
units connected
Model
Heat pump
Inverter
Others
20