61
9.3.3 Zero crossing detection error diagnosis and solution(E2)
Check if the connections and
power supply is normal?
Correct the connections. Turn on the
unit when the power supply is good.
No
Yes
Indoor main PCB is
defective. Replace indoor
main PCB.
9.3.4 Fan speed has been out of control diagnosis and solution(E3/E7)
Shut off the power supply
and turn it on 5 seconds
later. Is it still displaying
the error code?
Shut off the power supply,
rotate the fan by hand.
Does it rotate properly?
The unit operates normally.
Find out the cause and
have it solved. For
example, check
whether the fan is
blocked or the bearing
is broken?
Check the wires of fan
motor. Are all the
connections good?
No
Yes
No
Correct the connections.
No
Yes
Check whether the main PCB is
normal through index 2?
Yes
Yes
Check whether the fan
motor is normal through
index 1?
Yes
Replace the fan
motor
Replace the
main PCB.
The
malfunction is
solved?
No
No
If the
malfunction is
still existing,
replace the
main PCB
No
Summary of Contents for MOC-09CFN1-BS0W
Page 1: ...9ASUL A1 1211 SERVICE MANUAL MIDEA AIRCONDITIONER DC INVERTER SPLIT WALL MOUNTED TYPE...
Page 17: ...15 MS9A 18HRDN1 MP0W MS9A 18CRDN1 MS0W MS9A 18HRDN1 MS0W MS9A 24HRDN1 MP0W...
Page 18: ...16 MS9A 09HRDN1 BQ0W MS9A 12HRDN1 BS0W B...
Page 19: ...17 MS9A 24CRDN1 MP0W...
Page 20: ...18 MS9A 24HRDN1 MS0W...
Page 22: ...20 MOC 12CRDN1 MS0W MOC 12HRFN1 MS0W...
Page 23: ...21 MOF 18HDN1 MP0W MOF 18CRFN1 MS0W...
Page 24: ...22 MOF 18HRFN1 MS0W MOG 24HDN1 MP0W...
Page 25: ...23 MOC 09HFN1 BQ0W MOC 12HFN1 BS0W MOF 24HDN1 MP0W...
Page 26: ...24 MOG 24HDN1 MS0W MOF 24CDN1 MP0W...
Page 58: ...56 E4 Reserved function...
Page 72: ...70...