Xtreme Power Conversion Corporation
E90 Service Manual
Page 40
Uninterruptible Power Supply
LCD display
fault code
UPS alarm
Buzz
LED
The board may be damaged(1 shows the max.
Probability, 2 shows the less probability)
1
2
3
21
Input neutral
loss
twice/s
Fault ON
22
Battery reverse
twice/s
Fault ON
connection
wrong
control detec
-
tion board
23
Parallel connec
-
tion fault
twice/s
Fault ON
Parallel cable
not connect
-
ed well
control detec
-
tion board
24
CAN communi-
cation fault
twice/s
Fault ON
Setting paral-
lel mode but
only single
UPS working
control detec
-
tion board
25
Share current
when parallel
fault
twice/s
Fault ON
Parallel cable
problem
control detec
-
tion board
26
Battery high
voltage
once/s
Fault flash
battery fault
PFC power
board
control detec
-
tion board
27
Input phase se-
quence reverse
once/s
Fault flash
connection
wrong
28
Bypass reverse
once/s
Fault flash
connection
wrong
29
Output short
circuit
once/s
Fault flash
output short
30
Rectifier over-
current
once/s
Fault flash
PFC power
board
control detec
-
tion board
31
Bypass over-
current
once/s
BPS flash
bypass out-
put overload
32
Over load
once/s
INV or BPS
flash
output over
-
load
33
No battery
once/s
BATTERY flash battery dis-
connected
battery volt-
age abnormal
34
Battery voltage
low
once/s
BATTERY flash Low battery
and shutdown
35
Low battery pre-
alarm
once/s
BATTERY flash Battery low
and pre-alarm
36
Internal commu
-
nication error
once/2s
Fault flash
control detec
-
tion board
37
Inv. DC exces
-
sive
once/2s
INV flash
INV inductor
board
control detec
-
tion board
38
Overload in
parallel
once/2s
INV flash
output over
-
load
Redundancy
number set
-
ting is im-
proper
control detec
-
tion board