R410A Mini Split Chiller 50Hz
MCAC-ATSM-2014-01
40
E1:
Phase sequence malfunction
E2:
Indoor & outdoor unit communication checking channel is abnormal
LED indicates E1
Check whether the 3-phase power supply lacks
phase.
Check whether the phase order of 3-phase power
supply is incorrect.
Yes
Check the power supply and power wire.
Yes
Exchange the power wire of any two phases.
No
LED indicates E2
Check whether the signal wires of P, Q, (E) are wrong
connected.
Yes
Connect them well.
Check whether the wired controller and outdoor unit
are all powered on.
No
No
Put on the power.
Replace the PCB.
Yes
