Fault Code - Njoy Ranger Series User Manual

• Turn on the parallel system in Battery mode:
a) Turn on the battery breaker and output breaker of each UPS.
b) Turn on any UPS. A few seconds later, the UPS will enter to battery
mode.
c) Turn on another UPS. A few seconds later, the UPSs enter to Battery
mode and add to the parallel system.
d) If you have the third UPS, follow the same procedure of c). Then, the
parallel system is complete.
NOTE!
If you would like to have more information regarding the parallel operation, please
contact your supplier or service center for detail parallel operation instruction.
3.5.2. Add new units into the parallel system
• You can't add one new unit into the parallel system when whole system is
running. You must cut off the load and shutdown the system.
• Make sure all of the UPS are the parallel models, and follow the wiring
refer to section 2.5.
• Install the new parallel system refers to the previous section.
3.5.3. Remove units from the parallel system
There are two methods to remove units from the parallel system:
• First method:
a) Touch "CONTROL"► "Turn off UPS" and select "Yes" to turn of
the UPS. Then, the UPS will enter into Bypass mode or No Output
mode without output.
b) Turn off the output breaker of this unit, and then turn off the input
breaker of the same unit.
c) After it shuts down, you can turn off the battery breaker and
remove the data and share current cables. And then remove the
unit from the parallel system.
• Second method:
a) If the bypass is abnormal, you can not remove the UPS without
interruption. You must cut off the load and shut down the system first.
b) 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.
c) Turn off the output breaker and remove the data cable and share
current cable of the UPS which you want to remove. Now, you can
remove the UPS from parallel system.
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d) 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.
e) 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
01 Bus start failure
02 Bus over
03 Bus under
04 Bus unbalance
06 Converter over current
11 Inverter soft start failure
12 High inverter voltage
Inverter B output(line to
15
neutral) short circuited
Inverter C output(line to
16
neutral) short circuited
Inverter A-B output (line
17
to line) short circuited
Inverter B-C output (line
18
to line) short circuited
Fault code Fault event
43 Overload
46 Incorrect UPS setting
MCU communication
47
failure
Two DSP firmware
versions are
48
incompatible in parallel
system.
Bypass phase short
60
circuited
Bypass SCR short
61
circuited
Bypass SCR open
62
circuited
Voltage waveform
63
abnormal in A phase
Voltage waveform
64
abnormal in B phase
Voltage waveform
65
abnormal in C phase
Inverter current detect
66
abnormal
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