Hitachi RAS-(4-12)HNP(1)(E) - Activation of Transistor Module (RAS-(8-12)HN(P;C)(E))

8 Troubleshooting
268
SMGB0087 rev.0 - 12/2013
Alarm code
53
Activation of transistor module (RAS-(8-12)HN(P/C)(E))
- IPM or Dip IPM and PCB2 have detecting function of abnormality. This alarm is indicated when the transistor mod-
ule detect the abnormality 7 times in 30 minutes including 7. Retry operation is performed up to the occurrence of
6 times.
Conditions:
• The abnormal current such as short circuited, grounded or the overcurrent occurs at the transistor module.
• The temperature at transistor module increases abnormally.
• The control voltage decreases.
• The angle difference between the shaft in compressor and the shaft in the control program exceeds +60deg.