Xtreme Power Conversion Corporation
M90S-4S User’s Manual
Page 86
Uninterruptible Power Supply
7. Troubleshooting
Most of the fault and warnings need to be resolved by authorized service personnel. Few of them can be
solved by users themselves.
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 per-
sonnel.
Fault 02:Bus Over Volt
DC-bus voltage exceeds the maxi-
mum 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 maxi-
mum 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
voltage within specified time.
Turn off UPS and then restart it. If it
fails again, contact service personnel.
Fault 12:Inv Volt High
Inverter voltage is too high.
Contact service personnel.
Fault 13:Inv Volt Low
Inverter voltage is too low.
Contact service personnel.
Fault 14:Inv Short R
R phase inverter output is short cir-
cuited
Contact service personnel.
Fault 15:Inv Short S
S phase inverter output is short cir-
cuited
Contact service personnel.
Fault 16:Inv Short T
T phase inverter output is short cir-
cuited
Contact service personnel.
Fault 17:Inv Short RS
R-S inverter output is short circuited
Contact service personnel.
Fault 18:Inv Short ST
S-T inverter output is short circuited
Contact service personnel.
Fault 19:Inv Short TR
T-R inverter output is short circuited
Contact service personnel.
Fault 1A:Nega Power R
R phase inverter output negative
power is beyond the range.
Contact service personnel.
Fault 1B:Nega Power S
S phase inverter Output Negative
Power is beyond the range.
Contact service personnel.
Fault 1C:Nega Power T
Fault 21:Inv STS Open
Fault 22:Inv STS Short
Fault 23:Op STS Open
Fault 24:Op STS Short
Fault 25:Wiring Fail
Fault 26:Bat Fuse Open