Hitachi RAS-2-HVNP Service Manual page 260

8. Troubleshooting
55
Alarm code
• The RUN LED flickers and "ALARM" is displayed on the remote control switch.
• The unit number, the alarm code and the unit code are alternately displayed on the set temperature section. The unit
number and the alarm code are displayed on the display of the outdoor unit PCB.
- Actual frequency from Inverter PCB is less than 10 Hz (after inverter frequency output form PCB1 to Inverter PCB).
- This alarm is displayed when it occurs 3 times in 30 minutes. Retry operation is performed up to the occurrence of
2 times.
Condition of Activation:
This alarm is indicated when Inverter PCB is not performed normally.
Turn off power after LED201
(for RAS-(3-6)H(V)NPE /
RAS-(8-12)HN(P/C)(E)) or
LED303 (for RAS-(4-6)H(V)NCE)
on inverter PCB is turned OFF
and restart.
N O T E
When the excessive surge current is applied to the unit due to lighting or other causes, this alarm code or the cau-
se code of inverter stoppage (Itc=11) will be indicated on the 7-segment display on O.U. PCB1 and the unit can not
be operated. In this case, check to ensure the surge absorber (SA) on the noise filter (NF1). The surge absorber
may be damaged if the inner surface of the surge absorber is changed to black. If the surge absorber is damaged,
replace the noise filter. If the surge absorber does not have abnormality, turn OFF the power source once and wait
until turning OFF LED201 (red) on inverter PCB for approx. 5 min. Then, turn ON again.
246
SMGB0079 rev.0 - 01/2013
SP-226-1
OKAYA 250VAC/30A
LFB-14930-3MA
Surge Absorber (SA)
(Surge Arrester)
Abnormality of Inverter Module
E
Lot