MCAC-UTSM-2008-05 Troubleshooting
Outdoor Units 55
8. Running lamp flash at 5Hz, Timer and Alarm lamp on: Outdoor unit voltage protection
Runnin
on
Outdoor unit voltage protection
Check the voltage of outdoor unit power supply, whether the
voltage between L1 and N is about 198-254V
No
Replace the power board, then check whether the system can run normally
Check the power supply
Yes
Replace outdoor main board
Yes
Trouble is solved
No
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