Smartbitt SBOL50KTIII-3, Service Manual

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displayed.
16
Inverter L3
output short
When INV phase L3
output
voltage keeps lower and
output current keeps
higher than normal, the
fault signal will be
displayed.
17
Inverter L1L2
output short
When INV phase L1-
phase
L2(Line to line) voltage
keeps lower and output
current keeps higher than
normal, the fault signal will
be displayed
Remove all the loads. Turn off the UPS.
Check
whether the output of UPS and loads are
short
circuited. Make sure the short circuit is
removed, and the UPS has no internal faults
before turning on again.
18
Inverter L2L3
output short
When INV phase L2-
phase
L3(Line to line) voltage
keeps lower and output
current keeps higher than
normal, the fault signal will
be displayed
19
Inverter L3L1
output short
When INV phase L3-
phase
L1(Line to line) voltage
keeps lower and output
current keeps higher than
normal, the fault signal will
be displayed
1A None
Inverter L1
negative power
fault
When the output power on
the INV phase L1 terminal
is
overpower, the fault signal
will be displayed
Remove all the loads. Turn off the UPS.
Check
whether the output of UPS and loads are
short
circuited. Make sure the short circuit is
removed, and the UPS has no internal faults
before turning on again.
1B None
Inverter L2
negative power
fault
When the output power on
the INV phase L2 terminal
is
over power, the fault signal
will be displayed
1C None
Inverter L3
negative power
fault
When the output power on
the INV phase L3 terminal
is
over power, the fault signal
will be displayed
23 None Inverter relay open
The inverter voltage
detection is normal, but the
output voltage difference Check the INV relay circuited