75
6. Troubleshooting
Most of the Fault and Warning need to be released by authorized service personnel. Few of them
can be solved by users themselves.
LCD Message
Explanation
Solution
Fault! Bus Over Voltage
DC bus voltage is too high
Contact service personnel.
Fault! Bus Under Voltage
DC bus voltage is too low
Contact service personnel.
Fault! Bus Voltage
Unbalance
DC bus voltage is not balanced
Contact service personnel.
Fault! Bus Soft Start Time
Out
The rectifiers could not start due to low
DC bus voltage within specified duration
Turn off UPS and then restart the UPS.
If it fails again, contact service personnel.
Fault! Inverter Soft Start
Time Out
Inverter voltage cannot reach desired
voltage within specified duration
Turn off UPS and then restart the UPS.
If it fails again, contact service personnel.
Fault! Inverter Voltage High Inverter Voltage is too high
Contact service personnel.
Fault! Inverter Voltage Low
Inverter Voltage is too Low
Contact service personnel.
Fault! R Inverter Voltage
Short
R phase inverter Output is shorted
Contact service personnel.
Fault! S Inverter Voltage
Short
S phase inverter Output is shorted
Contact service personnel.
Fault! T Inverter Voltage
Short
T phase inverter Output is shorted
Contact service personnel.
Fault! RS Inverter Voltage
Short
R-S inverter Output is shorted
Contact service personnel.
Fault! ST Inverter Voltage
Short
S-T inverter Output is shorted
Contact service personnel.
Fault! TR Inverter Voltage
Short
T-R inverter Output is shorted
Contact service personnel.
Fault! Inverter R Negative
Power
R phase inverter Output Negative Power
over range
Contact service personnel.
Fault! Inverter S Negative
Power
S phase inverter Output Negative Power
over range
Contact service personnel.
Fault! Inverter T Negative
Power
T phase inverter Output Negative Power
over range
Contact service personnel.
Fault! Over Load Fault
Heavy overload causes UPS fault.
Reduce some load.
Fault! Over Temperature
Make sure adequate space is allowed for
air vents and the fan is working
Check if the ambient temperature is over
specification.
Or contact service personnel.
Fault! CAN Fault
CAN communication fault
Contact service personnel.
Fault! DSP MCU Stop
Communicate
As stated.
Contact service personnel.
Fault! Bypass SCR Fault
As stated.
Contact service personnel.
Warning! EPO Active
Check the EPO connector
Check if the connector is loose when EPO
acts abnormally.
Warning! Over Load Fail
The load devices are demanding more
power than the UPS can supply. Line
mode will transfer to Bypass mode.
Reduce some load and check output
Load-Capacity and specification
Warning! Communicate CAN
Fail
CAN communication error
Contact service personnel.
Summary of Contents for X90-5S
Page 17: ...15 X90 ENC5S...
Page 18: ...16 X90 SMB350...
Page 19: ...17 X90 ENC10S X90 SMB700 Figure 2 13 Terminal Blocks...