Hitachi RWM-(H)FSN3E, Руководство по обслуживанию

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12 Troubleshooting
SMGB0070 rev. 1 - 08/2011
382
Alarm code
53
Protection activation of IPM or DipIPM and PCB2 (RAS-(3-6)HVRNME-AF and
RAS-(8/10)HRNME-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.
- IPM or Dip IPM and PCB2 have detecting function of abnormality.
Š
This alarm is indicated when the transistor module detect the abnormality 7 times in 30 minutes including 7.
Retry operation is performed up to the occurrence of 6 times.
Conditions:
Abnormal current to the transistor module such as
Short circuited or grounded
or
Abnormal temperature of the IPM or Dip IPM and PCB2
or
Control voltage decrease
Yes
Check the PCB2
Check the IPM or Dip IPM.
*1) *2)
Check the compressor.
(If there is a short-circuit
between phase lines, replace
the compressor.)
No
Turn off power, disconnect U, V, W
from compressor terminals and restart.
Does the protecting function activate? *3)
Replace IPM or Dip IPM
Faulty
Good
Replace IPM and PCB2
Faulty
Is the silicon grease coated all over
between the IPM or Dip IPM and the
radiated fin?
No
Coat the silicon grease to all
the touched face between the
IPM and the radiated fin fully.
*4)
Good
Is the heat exchanger of outdoor
unit clogged?
Remove clogging.
Replace the PCB2
Yes
Yes
No
*1) Perform the high voltage discharge work by referring to the item Procedure of checking other main parts before
checking and replacing the inverter components.
*2) Regarding replacing or checking method for inverter components, refer to
Procedure of checking other main parts .
*3) Turn ON the Nº 1 switch of the dip switch DSW1 on PCB2 when restarting with disconnecting the terminals of the
compressor. After troubleshooting, turn OFF the Nº 1 switch of the dip switch DSW1 on PCB2.
*4) Use the silicon grease.
N O T E
When alarm code “53” is indicated, the outdoor fan motor (DC motor) ensure that DC fan motor is checked according to
the item Procedure of checking other main parts .