Midea M2OC-18HFN1-M Service Manual page 55

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