Troubleshooting MCAC-UTSM-2009-03
32 Outdoor Units
5. Running lamp and Defrosting lamp flash at 5Hz, the Timer lamp light
6. Running lamp and Timer lamp flash at 5Hz, the Defrosting lamp light
DC fan malfunction
Judge 1: Check whether the wiring of DC fan is break off
Yes
Connect the wiring well
No
Judge 2: Check whether the DC fan is failure
Running lamp and Defrosting lamp flash at 5Hz, the Timer lamp light
EEPROM malfunction
Judge 1: Check whether the EEPROM is inserted well
No
Insert the EEPROM well
Yes
Running lamp and Timer lamp flash at 5Hz, the Defrosting lamp light
Replace the indoor main board
No
Replace the DC fan
Yes
Replace outdoor main board
Judge 2: Check whether the EEPROM is ok
No
Replace the EEPROM
Yes
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