Midea MGA-D10/N1 Manual page 34

MCAC-UTSM-2008-11
E1: Phase sequence malfunction
LED indicates E1
Judge 1: Check whether the phase order of 3-phase
power supply is incorrect
Judge 2: Check whether the 3-phase power supply is
E2: In-outdoor unit communication checking channel is abnormal
LED indicates E2
Judge 1: Check whether the signal wires of P, Q, (E)
are wrong connected.
Judge 2: Check whether the wired controller and
outdoor unit are all powered on
Replace the PCB
Outdoor Unit
No
lack of phase
No
Yes
Yes
Swap the power lines of any two phases.
Yes
Check the power supply and power cable
Yes
Connect them well
No
Put on the power
Troubleshooting
33