Tripp Lite SU60KX manual Bypass Static Switch Fault, Bypass Static Switch Overload

5 Troubleshooting (continued)

5.2Troubleshooting Flow Charts (continued)

5.2.6“BYPASS STATIC SWITCH FAULT”

Start

Are the

bypass SCRs functioning?(1)

Y

Replace the M board (2)

Does the

fault still occur w/ UPS

in bypass mode?

Y

Replace the S or SA board(3)

END

N

Replace the SCR

N

Fig 5.2.6a

Note (1): Use a multimeter to measure the pins of bypass SCRs. If the ohm value is close to zero, it indicates that the SCR has failed. (For the location of bypass SCRs, turn to section 1.5)

Note (2): For the location of the NHS-SYS-M board, turn to section 1.5. To replace the NHS-SYS-M board, remove the EEPROM chip from the old NHS-SYS-M board and insert it into the new one.

Note (3): For the location of the NHS-SYS-S board (for 60kVA and 80kVA) or the NHS-SYS-SA board (for 20kVA and 40kVA), turn to section 1.5.

5.2.7“BYPASS STATIC SWITCH OVERLOAD”

Start

Is the UPS loading too high?

Y

Reduce loading

N

Is the load CT	N
functioning? (1)

Y

Replace P board or M

board(3) Calibrate parameter on

EEPROM(2)

Replace CT

END

Fig 5.2.7a

Note (1): Use a multimeter to measure OIP CT resistance. If the value is about 35ohm, the OIP CT is good.

Note (2): To learn about EEPROM parameter settings and calibration, turn to section 3.2.

Note (3): To learn the location of the NHS-SYS-P and NHS-SYS-M boards, turn to section 1.5. To replace the NHS-SYS-M board, remove the EEPROM chip from the old NHS-SYS-M board and insert it into the new one.

104