Kaisai KMK-60RY1, Руководство по обслуживанию

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M thermal Split
54 202004
Midea
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4.3 E1 Troubleshooting
Digital display output 4.3.1
Description 4.3.2

Phase sequence error.

Only applies to 3-phase models.

Split stops running.

Error code is displayed on outdoor unit main PCB and user
interface.
Possible causes 4.3.3

Power supply phases not connected in correct sequence.

Power supply terminals loose.

Power supply abnormal.

Main PCB damaged.
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M thermal Split
202004 55
Procedure 4.3.4
E1
The phase sequence of the 3-phase
power supply is incrorrect
1
Yes
Exchange any two of the 3 phase wires
No
Some power supply terminals are loose
2
Yes
Ensure all supply terminals are securely
fastened
No
The power supply is abnormal
Yes
Check the power supply equipment
No
Replace outdoor unit main PCB
Notes:
1. The A, B, C terminals of 3-phase power supply should match compressor phase sequence requirements. If the phase sequence is inverted, the compressor
will operate inversely. 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 phases will be very large as the power supply load of each outdoor unit will be on C phase. This can easily lead to tripped
circuits and terminal wiring burnout. Therefore if multiple units are to be used, the phase sequence should be staggered, so that the current is distributed
among the three phases equally.
2. Loose power supply terminals can cause the compressors to operate abnormally and compressor current to be very large.
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