Huawei UPS5000-E User Manual page 213

UPS5000-E-(60 kVA-125 kVA)
User Manual (Integrated UPS 3.0)
Case
The
bypass is
abnormal.
The ATS is
abnormal.
Issue 06 (2023-08-25)
Symptom
The buzzer buzzes,
and the fault indicator
is on.
After being powered
on, the ATS
automatically switches
from ON to OFF or
switches between ON
and OFF repeatedly.
NO TE
For details about component replacement and maintenance mentioned in Troubleshooting
and Alarm List, consult maintenance engineers.
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Possible Cause
The bypass
thyristor is
damaged.
The bypass
module
experiences
overtemperature.
The input three-
phase sequence is
incorrect.
8 Troubleshooting
Measure
Replace the bypass
module.
Reduce the load, or
improve ventilation.
Power off the ATS
and check the phase
sequence.
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