R410A All DC Inverter V5 X Series 50Hz MCAC-VTSM-2015-10
138 Troubleshooting
4.2 E1: Phase sequence error
The error will only display on the faulty unit, all the ODUs will be on standby.
Note:
If the wiring connection of each outdoor unit is in A, B, C phase sequence, and multiple units are connected, the current
difference between C phase and A, B phase will be very large as the power supply load of each outdoor unit is on C phase, this
can easily lead to tripped breakers and terminal wiring burnout. Therefore if multiple units are to be used, the phase sequence
should be staggered, so that the current can be distributed among the three phases equally.
The 3-phase sequence of power supply
is
wrong. (The A, B, C terminal of three-phase
power supply should meet compressor phase
sequence requirements. If the phase
sequence is inverted, the compressor will
Exchange any two of the 3
phase sequence
Some power supply terminals are loose, if
this occurs, the compressor will operate
abnormally, and the current is very large
Ensure all supply terminals are
securely fastened
Outdoor main PCB is damaged
Replace the outdoor main PCB
The power voltage supply is abnormal, or the
neutral line and live line are connected in
equipment and adjust the
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