44
load and shut down the system first.
2)
Make sure the bypass setting is enabled in each UPS and then turn off the running system. All UPSs
will transfer to Bypass mode. Remove all the maintenance bypass covers and set the maintenance
switches from “UPS” to “BPS” position. Turn off all the input breakers and battery breakers in
parallel system.
3)
Turn off the output breaker and remove the parallel cable and share current cable of the UPS which
you want to remove. Now, you can remove the UPS from parallel system.
4)
Turn on the input breaker of the remaining UPS and the system will transfer to Bypass mode.
Set
the maintenance switches from “BPS” to “UPS position and put the maintenance bypass covers back
on.
5)
Turn on the remaining UPS according to the previous section.
Warning:
(Only for the parallel system)
●
Before turning on the parallel system to activate inverter, make sure that all unit’s maintenance
switch at the same position.
●
When parallel system is turned on, please do not operate the maintenance switch of any unit.
●
Please Do NOT enable the ECO mode in parallel system.
3-6. Fault Code
Fault code Fault event
Fault code Fault event
01
Bus start failure
42
DSP communication failure
02
Bus over
43
Overload
03
Bus under
46
Incorrect UPS setting
04
Bus unbalance
47
MCU communication failure
06
Converter over current
48
Two DSP firmware versions are
incompatible in parallel system.
11
Inverter soft start failure
60
Bypass phase short circuited
12
High inverter voltage
61
Bypass SCR short circuited
14
Inverter L1 output(line to neutral)
short circuited
62
Bypass SCR open circuited
15
Inverter L2 output(line to neutral)
short circuited
63
Voltage waveform abnormal in L1
phase
16
Inverter L3 output(line to neutral)
short circuited
64
Voltage waveform abnormal in L2
phase
17
Inverter L1-L2 output (line to line)
short circuited
65
Voltage waveform abnormal in L3
phase
18
Inverter L2-L3 output (line to line)
short circuited
66
Inverter current detect abnormal
19
Inverter L3-L1 output (line to line)
short circuited
67
Bypass O/P short circuited
1A
Inverter L1 negative power fault
68
Bypass O/P line to line short circuited
1B
Inverter L2 negative power fault
69
Inverter SCR short circuited
1C
Inverter L3 negative power fault
6C
BUS voltage drops too fast
21
Battery SCR short circuited
6D
Current error value detect
23
Inverter relay circuited open
6E
SPS power error
24
Inverter relay short circuited
6F
Battery polarity reverse
25
Line wiring fault
71
PFC IGBT over-current in L1 phase
31
Parallel communication failure
72
PFC IGBT over-current in L2 phase
32
The host signal failure
73
PFC IGBT over-current in L3 phase
33
Synchronous signal failure
74
INV IGBT over-current in L1 phase
34
Synchronous trigger signal failure
75
INV IGBT over-current in L2 phase