Midea MFA-12HRN1 General Information Manual page 33

MCAC-UTSM-2009-03 Troubleshooting
4. Timer lamp flash at 5Hz
Timer flash at 5Hz
In-outdoor unit communication malfunction
Yes
Judge 1: Check whether the wiring of communication line is break off
Connect the wiring well
No
Yes
Judge 2: Check whether the wiring of L, N and S is wrong
Connect the wiring of L, N and S rightly
No
Replace the PCB
Outdoor Units 31