Njoy Ranger 180KT, User Manual

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39

•

  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.

    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.

●  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.

WARNING (Only for the parallel system)

3.6. Fault Code

Fault code Fault event

Fault code Fault event

01

Bus start failure

43

Overload

02

Bus over

46

Incorrect UPS setting

03

Bus under

47

MCU communication 

failure

04

Bus unbalance

48

Two DSP firmware 

versions are 

incompatible in parallel 

system.

06

Converter over current

60

Bypass phase short 

circuited

11

Inverter soft start failure

61

Bypass SCR short 

circuited

12

High inverter voltage

62

Bypass SCR open 

circuited

15

Inverter B output(line to 

neutral) short circuited

63

Voltage waveform 

abnormal in A phase

16

Inverter C output(line to 

neutral) short circuited

64

Voltage waveform 

abnormal in B phase

17

Inverter A-B output (line 

to line) short circuited

65

Voltage waveform 

abnormal in C phase

18

Inverter B-C output (line 

to line) short circuited

66

Inverter current detect 

abnormal