Midea MCA3U-09HRFN1-M(C) User Manual

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17.4.3 Fan speed malfunction diagnosis and solution (E3)
Error Code
E3
Malfunction conditions
When indoor fan speed is too low (300RPM) for a certain period
of time, the unit ceases operation and the LED displays a failure
code.
Potential Causes
● Wiring mistake
● Faulty fan assembly
● Faulty fan motor
● Faulty PCB
Trouble shooting:
Power off, then restart the
unit after 2 minutes. Does
a problem remain?
Shut off the power supply,
Rotate the fan by hand.
Does it turn easily?
The unit is operating normally
Find the cause of the
problem and resolve it
Check the wiring of fan
motor. Is it improperly
wired?
No
Yes
No
Correct the connections.
No
NoReplace the fan motor
Yes
Yes
Measure the voltage for the
fan motor from the main
PCB. Is it within normal
parameters?
Yes
Replace the main PCBNo

Midea MCA3U-09HRFN1-M(C) Specifications

General

Brand	Midea
Model	MCA3U-09HRFN1-M(C)
Category	Air Conditioner
Language	English