Xtreme Power Conversion P91 - Page 19

Xtreme Power Conversion Corporaon
P91, TX91, TX91L, TXVR Service Manual
Page 19
Uninterrupble Power Supply
7.1.2 Trouble shoong for fault codes in LCD display
When the UPS is fault, it will transfer to Fault mode.
Code LCD icon Fault Event Descripon Acon
01 None BUS so start failure When the bus voltage can’t reach the
seng value in 30s, the fault signal
will be displayed.
Check if power components such
as PFC/ INV IGBT and PFC SCR
are well. Meanwhile, check if the
components on the drive circuit
are well.
02 None BUS voltage high When one of the following condi-
ons occurs, the fault signal will be
displayed.
1. +Bus voltage remains
higher than 450V or the –BUS volt-
age remains lower than –450V for
more than 50 ms.
2. +Bus voltage remains higher than
400V or the –BUS voltage remains
lower than –400V for more than 1.5s.
Maybe the main board is dam-
aged;
Check if power components such
as IGBT and SCR for the PFC and
the ulity power SCR are well.
Meanwhile, check if components
on the drive circuit are well.
03 None BUS voltage low When +Bus voltage remains lower
than 230V or the –BUS voltage re-
mains higher than –230V for more
than 200ms, the fault signal will be
displayed.
Maybe the main board is dam-
aged. Check if power components
such as IGBT and SCR for the PFC
and the ulity power
SCR are well. Meanwhile, check if
components on the drive circuit
are well.
04 None BUS voltage unbal-
ance
When the dierence between the
±Bus voltage absolute value remains
more than 40V for 2 minutes, the
fault signal will be sent.
Maybe the main board is dam-
aged.
Check if power components such
as IGBT and SCR for the PFC and
the ulity power SCR are well.
Meanwhile, check if components
on the drive circuit are well.
11 None INV so start failure Inverter voltage can’t reach the set-
ng value in 30s.
Check the inverter drive circuit.
12 None INV voltage high When INV voltage remains higher
than 276V for 128 ms, the fault signal
will be displayed.
Check if power components in
power INV and on the drive circuit
are normal. Check if IGBT protec-
ve circuit and some PFC compo-
nents are normal.
13 None INV voltage low When INV voltage remains lower than
140V for 128 ms, the fault signal will
be displayed.
Maybe the main board is dam-
aged;
Check if power components in
power INV
and on the drive circuit are
normal. Check if IGBT protecve
circuit and some PFC components
are normal.