8 Troubleshooting
269
SMGB0064 rev.0 - 08/2011
8
Alarm code
53
Transistor module protection activation for ES Series
• 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.
- This alarm is displayed when the inverter PCB or DIP-IPM module detects the abnormal operation 7 times or more
than 7 times in 30 minutes. The retry operation is performed six times.
Conditions:
The abnormal current to the inverter PCB or DIP-IPM, such as short-circuited, grounded, overcurrent or control voltage
decrease.
RAS-(4~6)HVRNS1E
N O T E
• *1) Regarding replacing or checking method for the DIP-IPM refer to section Procedure of checking other main
parts for ES Series, see on page 312.
• *2) Set the #1 pin of DIP switch DSW1 on inverter PCB or DIP-IMP to ON when you are restarting with the termi-
nals of the compressor disconnected. After the troubleshooting, set the #1 pin of DIP switch DSW1 on Inverter
PCB or DIP-IPM to OFF.
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