Smartbitt SBOL50KTIII-3, Service Manual

Page: 28 / 57

28
63 None
Inverter L1
waveform
abnormal
the voltage difference
between the inverter
reference and inverter
sample is greater than
normal
Check the load is not overload and no surge
load ,Check the Inverter circuited
64 None
Inverter L2
waveform
abnormal
the voltage difference
between the inverter
reference and inverter
sample is greater than
normal
65 None
Inverter L3
waveform
abnormal
the voltage difference
between the inverter
reference and inverter
sample is greater than
normal
67 None
Bypass output
short (L-N)
Bypass O/P voltage drop
too fast and O/P current
more than normal
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.
68 None
Bypass output line
short (L-L)
Each of line current more
than normal, but line plus
line current lower than
normal
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.
69 None
Inverter Relay
short circuited
There isn’t signal drive the
Inverter Relay close, but
inverter output voltage over
normal
Check the Inverter Relay circuited
6C None
BUS voltage vary
fast
BUS voltage drop too fast
in Inverter mode.
Remove all the loads. Turn off the UPS.
Check
whether the output of UPS and loads are
short
circuited.
6D None
Current detect
error
Inverter current and share
current and output current
sample deviation more
than normal
Check the current sample circuited on the
bypass board.
6E None SPS Power fault
SPS 12V power lower than
normal
Check the SPS circuited
6F None
Battery connect
reverse
Battery polarity reverse Check the battery connect polarity
71 None
L1 PFC IGBT over
current fault
The unit have detected
IGBT fault signal from the
drive board
Check the IGBT drive signal and PFC IGBT
circuited
72 None
L2 PFC IGBT over
current fault
The unit have detected
IGBT fault signal from the
drive board
73 None
L3 PFC IGBT over
current fault
The unit have detected
IGBT fault signal from the
drive board