Service Manual

8. Troubleshooting
246
SMGB0079 rev.0 - 01/2013
Alarm code
55
Abnormality of Inverter Module
• The RUN LED ickers 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lter(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lter.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.
Lot
SP-226-1
250VAC/30A
OKAYA
LFB-14930-3MA
E
Surge Absorber (SA)
(Surge Arrester)
Max. 50Max. 5
Max. 2.5