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INSTALLATION AND OPERATION MANUAL
20
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.
NOTE:
If the wireless remote control switch is used for the wall-mounted indoor unit, remove the connectors
(CN25) connected to the indoor PCB. If they are not removed, the unit will not operate.
The memorized data can not be erased unless the remote control switch is initialized.
PMML0197_r0_04-10.indb 20
Indoor unit number
Alarm code
Alternating
Model code:
indication
every second
Alarm code
No. of indoor
units connected
Model code
Indication
Model
Heat pump
H
Inverter
P
Multi (Set-Free)
F
Only cooling
C
Others
E
Twin, triple & Quad
08/07/2010 9:20:24
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