Hitachi RWM-(H)FSN3E, Руководство по обслуживанию

Страница: 390 / 424

12 Troubleshooting
SMGB0070 rev. 1 - 08/2011
380
Alarm code
51
Abnormal operation of the current transformer (0A detection) (RAS-(3-10)H(V)RNME-AF)
• 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.
- This alarm code is indicated when the below condition is activated 3 times including 3 in 30 minutes. Retry ope-
ration is performed up to the occurrence of 2 times.
- Condition of activation:
Š
When the frequency of compressor is maintained at 15 to 18Hz after compressor is started, one of the abso-
lute value of running current at each phase is less than 1.5A (including 1.5A).
Yes
No
Restart the operation
How is the compressor
operation when you restart
the compressor?
Compressor stops immedia-
tely (nearly 18Hz)
Compressor does not operate
P7 is displayed *1)
Faulty PCB2.
Replace PCB2 *2)
Power wiring of the comp. is
not through CT.
Pass the wires through CT
Replace PCB2
Is the coil resistance of
the comp. normal?
Is output of ISPM, IPM or
dipIPM correct?
Or is the voltage between
U-V, V-W and W-U?
Replace dip IPM, IPM if faulty
Replace the compressor
No
Yes
*1) P7 is shown at 7-segment on the outdoor unit PCB.
*2) Perform the high voltage discharge work by referring to the item Procedure of checking other main parts before chec-
king and replacing the inverter parts.