6. Troubleshooting
A user will need to contact authorized service personnel to troubleshoot most of the Faults and
Warnings.
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
Negative half DC bus voltage and
positive half DC bus voltage are not
balanced.
Contact service personnel.
Fault! Bus Soft Start Time
Out
The rectifiers could not start within
specified duration due to low DC bus
voltage.
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 a desired
level 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
is out of range.
Contact service personnel.
Fault! Inverter S Negative
Power
S phase inverter Output Negative Power
is out of range.
Contact service personnel.
Fault! Inverter T Negative
Power
T phase inverter Output Negative Power
is out of range.
Contact service personnel.
Fault! Over Load Fault
Heavy load causes UPS to fault.
Reduce some load.
Fault! Over Temperature
Make sure adequate space is allowed for
air circulation and the fans are 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.
Summary of Contents for X90-2S
Page 12: ...2 6 1 Mechanical Data Dimensions Width Depth Height 600mm 1065m 2010mm Figure 2 8 Dimensions...
Page 15: ...Figure 2 13 Terminal Blocks...
Page 17: ...Off There is neither a fault nor an alarm...
Page 22: ......
Page 37: ......
Page 39: ...Step 7 Switch ON the output breaker Q3 AC startup procedure is complete...
Page 42: ......
Page 53: ...Figure 4 6 Control screen page...
Page 55: ...Figure 4 9 System Measurement Screens...
Page 56: ...Figure 4 10 Module Measurement Screens...
Page 88: ......