Hitachi RASC-10HNPE, Service Manual, Page: 250 / 306

10 Troubleshooting
Troubleshooting procedure
SMGB0091 rev.2 - 11/2015 240
Alarm code
54
Abnormality of inverter fin temperature (RASC-(4-6)HNPE)
This alarm code is indicated after the operation is stopped when the following condition occurs three times within 30
minutes. The retry operation is performed twice.
Conditions:
• When the temperature inside the transistor module of the inverter PCB exceeds 90 °C.
Remove clogging
Is the heat exchanger
of RASC unit clogged?
No
Yes
Replace DIP-IPM. *1)
Yes
Replace DIP-IPM. *1)
No
Restart operation.
Does it trip soon?
?
N O T E
*1): Perform the high voltage discharge work by referring to the paragraph “RASC-(4-6)HNPE” in section “10.4.2 Checking procedure for
the inverter PCB” , before checking and replacing the inverter components.