Hitachi RAS-5FSNY2E [144/148] On screen displays during abnormal operation

Hitachi RAS-5FSNY2E [144/148] On screen displays during abnormal operation
12 Troubleshooting
136
TCGB0068 rev.1 - 08/2012
12.1 On-screen displays during abnormal operation
Abnormal operation can be produced due to the following reasons:
Malfunction
The RUN (red) indicator ashes.
The ALARM indicator appears on the liquid crystal display.
The screen also displays the following items:
- A: indoor unit address.
- B: Refrigerant cycle number.
- C: Alarm code.
- D: Model code.
- E: If there are various indoor units connected, the above mentioned informa-
tion is shown for each one of them.
Write down the indications and contact your HITACHI service supplier.
Power supply failure.
All displays disappear.
If the unit stops due to a power shortage, it will not start again, even though the power
comes back on. Carry out the start-up operations again.
If the power failure lasts less than 2 seconds, the unit will start again automatically.
Electrical noise
The displays can disappear from the screen and the unit can stop. This is because the
microcomputer has been activated to protect the unit from electrical noise.
N O T E
If the wireless remote control is used for the wall-type indoor unit, remove the
connectors (CN25) that are connected to the indoor PCB. Otherwise the unit
will not work. The stored data cannot be erased unless the remote control is
initialised.
A
B
C
C
D
E
Model code
Indication Model
H
Heat pump
P
Inverter
F
Multi (SET-FREE)
C
Cooling only
E
Other
b
IVX, individual operation
L
KPI

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