82
Table 7-1. Trouble shooting
At mains status, the UPS works
normally, once power outage, the
UPS works normally but load
system halts.
FAULT indicator of a power unit
is on.
•
How to deal with the system fault in emergency
When system faults, shut down the power supply of UPS using the touch screen, if necessary, close the user
load and disconnect the input and output breaker of the UPS to avoid further damage to the UPS. Inform the
engineering technician for maintenance.
•
How to deal with the fault of single power unit in emergency
When some power unit faults, it will be insulated with system automatically, and generally, it will not
influence the system normal operation, but it will decrease the redundancy degree of the unit. At this time,
please shut down the fault unit and pull it out of the cabinet, and then inform the engineering technician for
maintenance.
After pulling out the unit, there is still high voltage inside the unit and on the rear connector pin. It is
necessary to wait (≥10 min) and then open the cover for maintenance.
The grounding is improper and the float voltage between
neutral wire and grounding wire is too large.
The power unit is faulty, replace it in time.
No.
Abnormal phenomena
Possible reason
7.4.2 Emergency dispose for system fault
10
11
