Midea M4OC-36HRFN1-M - Page 55

9.4.1.10 Full-water malfunction diagnosis and solution(For cassette/A5 duct)
Malfunction decision
conditions
If the sampling voltage is not 5V, the LED will display the
failure.
Supposed causes
● Wiring mistake
● Water-level switch faulty
● Water pump faulty
● Indoor PCB faulty
If the water-level switch
is inserted well?
No
Insert the water-level switch well
If the water-level switch
is broken?
Yes Replace the water-level switch
If the water pump is
normal?
No
Replace the water pump
Yes
No
Yes
Check PCB board or replace the indoor main PCB