VGD-33 single unit upgrade to parallel system
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All single units must work properly
Installation of the external cables and power cords: all
should be connected firmly.
VGD-40K3-DTT-0010N single unit PCB setting
• PCB P430：CN26 pin 1-2
CN28 pin 1-2
• PCB P386：CN17，CN27，CN37：short
• PCB P428：SW2-1：short
SW2-2：short
CN22，CN23：pin 2-3
VGD-40K3-DTT-0011N parallel system PCB setting
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PCB P267: Master UPS：SW1-1：OFF
SW1-2：ON
Slave UPS ：SW1-1：ON
SW1-2：OFF
PCB P430：CN26：pin 2-3
CN28：pin 2-3
PCB P386：CN17，CN27，CN37：open
PCB P428：SW2-1：open
SW2-2：open
CN22，CN23：pin 1-2
VGD-40K3-DTT-0010N
parallel system PCB placement
115-P390-011
112-P263-011
Resister
111-P349-051
Bridge diode
Resister
Terminal block
110-P430-010
112-P428-021
VGD-40K3-DTT-0011N
parallel system PCB placement
115-P390-011
112-P263-011
Resister
111-P349-051
Bridge diode
Resister
Terminal block
110-P430-010
110-P267-010
112-P428-021
VGD-40K3-DTT-0010N single unit
PCB placement photo
VGD-40K3-DTT-0011N parallel system
PCB placement photo
Bridge rectifier and
Golden
aluminum
shelled resistors
Terminals
Parallel system cable connect
VGD-40K3-DTT-0010N single unit SCH.
VGD-40K3-DTT-0011N parallel system SCH-1.
VGD-40K3-DTT-0011N single unit SCH-2
Caution
• All cables should be connected correctly; tighten any
loose connection.
• There should be no missing or loose parts found on the
PC board.
If any of the above faulty circumstances occur, please
test again after completion of troubleshooting.
CAN BUS setting
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Disconnect P430 CN7 connector first
Turn on MST input power
Enter Paramt -> Communic menu for settings
Equipm. Address: 001 Metro Address : 001
Turn on SLV input power
Enter Paramt -> Communic menu for settings
Equipm. Address: 002 Metro Address : 002
CAN Address : 001
CAN Address : 002
Power-on without Main Power Supply
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Turn on MST and SLV EPO switches, panel ON.ON. Wait about 1 minute and the system will move to INV.
Confirm MST panel is indicating Parallel_MST_OK and SLV panel is indicating Parallel_SLV_OK
Confirm MST and SLV panel system is working in the INVERTER mode
Confirm MST panel and SLV panel settings via Paramt-> Test Prm
PDS=0
POV=0
PNU=2
PBP=2
PIV=2
MST panel OFF, ON, and confirm MST and SLV are all wired to BYPASS
Turn off EPO switch
Turn off MST and SLV input power
Disconnect the external CN4 25P connector of SLV
Turn on MST and SLV input power
Confirm MST panel is indicating Parallel_MST_OK and SLV panel is indicating Parallel.Bus
Turn on EPO switch, panel ON.ON
Turn off MST and SLV input power
Re-connect CN4 25P connector and disconnect the external CN1 and CN2 connectors of SLV
Turn on MST and SLV input power
Turn on EPO switch, panel ON.ON
Confirm MST panel is indicating Parallel_MST_OK and SLV panel is indicating Parallel.Bus
Turn off MST and SLV input power
Power-on with Main Power Supply
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Confirm the phase is locked
Re-connect two 430 CN7 connectors
Two sets of UPS P428: SW2-1 OFF, SW2-2 ON
Turn on MST and SLV input power
Turn on EPO switch
Wait about 1 minute, two UPS INVERTERs will start operation
Confirm MST and SLV panels are working properly and do not
display any error message. MST panel is indicating
Parallel_MST and SLV panel is indicating Parallel_SLV
• Turn on MST and SLV battery switches
• Turn off input switches simultaneously
• Confirm the two sets have the same output waveform, phase
and voltage
Power-on with Main Power Supply
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EPO, output switch and maintenance bypass switch are confirmed
MST EPO switch OFF, confirm MST and SLV outputs are all closed
MST EPO switch ON, wait for MST and SLV to turn to INVERTER
SLV EPO switch OFF , confirm MST and SLV outputs are all closed
SLV EPO switch ON , wait for MST and SLV to turn to INVERTER
Turn off MST output switch, and confirm MST is switched to SINGLE and SLV is
switched to MST
Turn on MST output switch, panel ON.ON, and wait for the original MST to be
switched from SINGLE to MST
Turn off SLV output switch, and confirm SLV is switched to SINGLE
Turn on SLV output switch, panel ON.ON, and wait for the original SLV to be switched
from SINGLE to SLV
MST panel OFF, ON, and confirm MST and SLV system is wired to bypass
Turn on MST maintenance bypass switch, and confirm MST and SLV panels are
indicating Parallel Sys., Manten. Byp
Turn off MST maintenance bypass switch
Turn on SLV maintenance bypass switch, and confirm MST and SLV panels are
indicating Parallel Sys., Manten. Byp
Turn off SLV maintenance bypass switch
Wait for the INVERTER of MST and SLV system to be reset
If all the above functions work properly, the parallel units may be operated properly.