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6.3 Parallel Operation Mode Fault Codes
FAULT DESCRIPTION
A23 MODE FAILURE
SLAVE ups search for the same operating mode with MASTER ups ,if they are
different this message locates on LCD panel.
Change the operation mode of SLAVE ups from SETTINGS MENU.
Don’t forget to press ENTER key for 3 seconds
Turn off the SLAVE ups and turn on again.
A24 P.FAILURE 17
Parallel Controller Board Failure
A25 P.FAILURE 18
Parallel Controller Board Failure
A26 P.FAILURE 19
Parallel Controller Board Failure
A27 P.FAILURE 20
Parallel Controller Board Failure
A28 P.FAILURE 21
Parallel Controller Board Failure
A29 P.TEST MODE
Parallel control board is in test position
A30 P FAILURE 23
Parallel Controller Board Failure
A31 DUBL UPS NR.
The same UPS number is selected for SLAVE ups ,you must give separate ups
number to each ups in parallel system.
Go to SETTINGS MENU and change UPS number.
Don’t forget to press ENTER key for 3 seconds.
Turn off the SLAVE ups and turn on again.
A40 CANT FIND PR
Parallel mode is selected but main controller could not find parallel control board.
Select ONLINE mode from SETTING MENU.
Turn off the ups and turn on again.
A41 P.BAL.FAILURE
Current sharing failed in parallel operation, after a delay sharing will try again
A43 P.SYNC.FAIL
In parallel system SLAVE UPS is not synchronized to MASTER UPS
After a delay SLAVE ups will try to syncron again.
A48 STATIC BYP
In parallel system static bypass switch (S6) is in “ON” position.
6.4 Parallel System Accessories
For parallel operation the following parts need to be installed inside the UPS:
• Parallel control board
• Current transformers
• Digital connection cable
• Analog connection cable
• Fully static bypass system
IMPORTANT NOTE: Parallel system installation is much more complex from standalone UPS
installation, it needs qualified service staff.
You have to keep 80 cm distance between two UPS for service purposes. The maximum length of
digital and analog cable is 2 meters.
Add %20 tolerance to cables, fuses and circuit breakers in parallel connection.
At figure 6-2 ,the connection of 2 parallel UPSs and load switch panel is shown.
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