Xtreme Power Conversion Corporation
M90S Service Manual
Page 23
Uninterruptible Power Supply
LCD Message
Explanation
Solution
Fault 14:Inv Short R
R phase inverter output is short
circuited
Mainly check that the R phase IGBT etc power
components are well. Meanwhile check that the
components on the drive circuit are well.
Fault 15:Inv Short S
S phase inverter output is short
circuited
Mainly check that the S phase IGBT etc power
components are well. Meanwhile check that the
components on the drive circuit are well.
Fault 16:Inv Short T
T phase inverter output is short
circuited
Mainly check that the T phase IGBT etc
power components are well. Meanwhile check that
the components on the drive circuit are well.
Fault 17:Inv Short RS
R-S inverter output is short
circuited
Mainly check that the R/S phase IGBT etc
power components are well. Meanwhile check that
the components on the drive circuit are well.
Fault 18:Inv Short ST
S-T inverter output is short
circuited
Mainly check that the S/T phase IGBT etc
power components are well. Meanwhile check that
the components on the drive circuit are well.
Fault 19:Inv Short TR
T-R inverter output is short
circuited
Mainly check that the R/T phase IGBT etc
power components are well. Meanwhile check that
the components on the drive circuit are well.
Fault 1A:Nega Power R R phase inverter output negative
power is beyond the range.
Check the AC output Voltage. If the actual
output voltage and the default voltage difference is
bigger.
Fault 1B:Nega Power S S phase inverter Output Negative
Power is beyond the range.
Check the AC output Voltage. If the actual
output voltage and the default voltage difference is
bigger.
Fault 1C:Nega Power T T phase inverter Output Negative
Power is beyond the range.
Check the AC output Voltage. If the actual
output voltage and the default voltage difference is
bigger.
Fault 21:Inv STS Open Inverter relay or STS is open.
Contact service personnel.
Fault 22:Inv STS Short Inverter relay or STS is short
circuited.
Contact service personnel.
Fault 23:Op STS Open Output relay or STS is open.
Contact service personnel.
Fault 24:Op STS Short Output relay or STS is short
circuited.
Contact service personnel.
Fault 25:Wiring Fail
The wiring is wrong.
Cut off input power. Connect to power
turn on again.
Fault 26:Bat Fuse
Open
Battery fuse is broken.
Replace the battery Fuse.
Fault 27:Charge Short The battery is short circuited.
Contact service personnel.
Fault 31:Para Comm
Fail
The communication between
UPS modules is interrupted.
Contact service personnel.
Fault 32:Host Line Fail The host line between UPS mod
‐
ules fails.
Contact service personnel.
Fault 33:OP Curr
Unbal
The load share line between UPS
modules fails.
Contact service personnel.
