Midea CTBU-09HWFN1-M Service Manual page 104

Water-level alarm malfunction
16.3.6
Error Code
Malfunction conditions
Possible causes
Power off, then restart the unit 3 minutes
Power off, then restart the unit 3 minutes
later. Is it still displaying the error code?
later. Is it still displaying the error code?
Yes
If the water-level switch
If the water-level switch
is inserted well?
is inserted well?
Yes
If the water-level switch
If the water-level switch
is broken?
is broken?
No
Replace the water pump, If
Replace the water pump, If
malfunction is
malfunction
solved
solved
Yes
Replace the indoor main PCB
Replace the indoor main PCB
EE
If the sampling voltage is not 5V, the LED will display the
failure code.
● Wiring mistakes
● Faulty water-level switch
● Faulty water pump
● Faulty indoor PCB
No
Yes
still not
is still not
diagnosis and solution
Insert the water-level switch well
Insert the water-level switch well
Replace the water-level switch
Replace the water-level switch
101