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3-5. Parallel UPS Operation
You can add one new UPS into the parallel system when whole system is running at any mode. The additional UPS
will automatically match with the Master UPS. Then, fasten the UPS through the screw of mounting ears.
NOTE:
•
Before parallel operation, please make sure all the connections are correctly (refer to Section 2-5).
•
The maximum parallel quantity is 10.
•
Be sure the load is less than the maximum capacity of whole UPS system. Otherwise, the UPS will overload
fault.
4. Trouble Shooting
4-1. Warning status
When Fault LED flashes and the buzzer beeps once every second, it means that there are some
problems with UPS. Users can see the warning code from LCD panel and refer to the trouble shooting
table to check what problem probably happen.
4-2. Fault mode
1) When Fault LED illuminates and the buzzer beeps continuously, it means that there is a fatal error about
UPS. Users can get the fault code from LCD panel. Please refer to the trouble shooting table to check
what problems probably happen.
2) Don’t try to turn on the UPS again before the problem is clear. If the problems can’t be fixed, please
contact the distributor or service people immediately.
3) For emergency case, please cut off the connection from utility, external battery, and output immediately
to avoid more risk or danger.
4-3. Trouble shooting table
Most of the fault and warnings need to be released by authorized service personnel. Few of them can be solved
by users themselves.
LCD Message
Explanation
Solution
Fault 01:Bus Start Fail
The rectifiers could not start within
specified time due to low DC-bus voltage.
Turn off UPS and then restart the UPS.
If it fails again, contact service personnel.
Fault 02:Bus Over Volt
DC-bus voltage exceeds the maximum
voltage.
Contact service personnel.
Fault 03:Bus Under Volt
DC-bus voltage is lower than the
minimum value.
Contact service personnel.
Fault 04:Bus Unbalance
DC-bus voltage is not balanced
Contact service personnel.
Fault 05:Bus Volt Vary
DC-bus voltage changes too fast.
Contact service personnel.
Fault 06:PFC Over Curr
PFC current is higher than the maximum
current.
Contact service personnel.
Fault 07:Over Temperature
The temperature in UPS is higher than
85°C. At this time, the UPS is off.
Check if the ambient temperature is over
specification.
Or contact service personnel.
Fault 08:Batt SCR Short
Battery SCR is short circuited.
Contact service personnel.
Fault 11:Inv Start Fail
Inverter voltage cannot reach desired
Turn off UPS and then restart it. If it fails
