Xtreme Power Conversion Corporation
P91, TX91, TX91L, TXVR Service Manual
Page 21
Uninterruptible Power Supply
Code
LCD icon
Fault Event
Description
Action
31
None
No communication
fault
No communication fault
Check if the parallel wire is con-
nected well.
41
None
Over temperature
Detecting NTC temperature more
than 90°C
Check if UPS is overloaded, air
vents are blocked, and ambient
temperature is over 40°
After overload or block is re-
moved, please keep UPS cool
down for 10 minutes before turn-
ing on again.
It is not recommended to operate
the UPS under over 40°C tempera-
ture environment.
42
None
Internal fault
CPU can not build communication or
the control board is damaged.
Replace the CNTL board.
Or replace the CNTL board and
COMMU board or update the
firmware.
43
Overload
The load over 100%
Check the loads and remove
some non-critical loads.
Check whether some loads are
failed.
6A
None
Battery Turn-on
failure
During on UPS by battery, the bus
voltage is high or having high current
PFC or INV components are prob-
ably damaged. Replace the main
board.
6B
None
PFC current failure in
battery mode
The detected value of two sides PFC
current unbalance over 30A
HCT and detecting circuit of PFC
on main board is faulty. Replace
the main board.
6C
None
Bus voltage chang-
es too fast
The bus voltage fluctuated more
than 50V in one period.
Check if detecting circuit of Bus or
the IGBT of PFC/INV is OK.
Maybe you also need to check to
see if the load is normal or not.
6E
None
SPS 12V abnormal
the 12V output of SPS is abnormal
Something is wrong with SPS
circuit. Replace the SPS-Charger
board.
