22
1B
Inverter
2
output
negative
power
fault
When the output power on
the INV
2
terminal is over
-3000W(for
10k
is
-1500W) for more than
20ms or -800W(for 10k is
-400W) for more than
100ms, the fault signal will
be displayed
Check if input and output connections are
correct. And then check if INV relay RY5 or
STS(Q19, Q20, Q21,Q22 and their driver
circuits) are OK. Also please check if the
power feedback load connected to the
UPS.
1C
Inverter
3
output
negative
power
fault
When the output power on
the INV
3
terminal is over
-3000W(for
10k
is
-1500W) for more than
20ms or -800W(for 10k is
-400W) for more than
100ms, the fault signal will
be displayed
Check if input and output connections are
correct. And then check if INV relay RY5 or
STS(Q17, Q18, Q19,Q20 and their driver
circuits) are OK. Also please check if the
power feedback load connected to the
UPS.
21
None
Battery SCR short
circuited
When battery voltage is
more than 310V for 4s, the
fault signal will be
displayed.
It is probably the charger or PFC board
damaged.
Check if the battery SCR(Q21,Q27, Q26,
Q49, Q46,Q58). If PFC board is ensured ok
after checking, it may indicate there is
something wrong with charger output.
Check if components for the battery drive
signals are normal. Check circuit of the
utility power SCR part.
24
None
INV relay short
circuited
After Bus soft start
completes and INV PWM
is off, more than 50V INV
voltage is detected, the
fault signal will be
displayed.
Check if INV relay RY5(for 20KVA,check
RY5 and RY6) on INV board is OK.
29
None
Battery
fuse
broken in Battery
mode
When this battery voltage
is less than 7V, any other
battery voltage is higher
than 9V
The fault signal will be
displayed.
Check the Battery fuse is ok
31
None
Parallel
cable
failure
When the parallel
communication between
the UPSs is interrupted,
the fault signal will be
displayed.
Check the parallel cables between the
UPSs are normal, and the cable between
the parallel board and the control board are
normal.
36
None
Current
un-sharing
When sharing current is
greater than 5A and
sharing current is greater
than 5*ILoad or the share
current less than 5A and
greater than the ILoad+4A
in UPS parallel system,
the fault signal will be
displayed.
Check the share current cable are normal,
and make sure the output be connected
together.
Summary of Contents for G31 10K
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