Tripp Lite SU60KX manual Bypass Sequence NOK, Bypass Static Switch Over Temperature

5 Troubleshooting (continued)

5.2 Troubleshooting Flow Charts (continued)

5.2.4 “BYPASS SEQUENCE NOK”

Start

Is the bypass	N
input external wiring
correct?
Y
Is the bypass input
source phase correct?

Correct the wiring

END

Fig 5.2.4a

5.2.5“BYPASS STATIC SWITCH OVER TEMPERATURE”

Start

Is the UPS loading	N	Have the			N	Temperature sensing
too high?		fans	(1)	failed?		circuit has failed.
						Replace the NTC (2)
Y		Y

Reduce loading

Replace the fan

END

Fig 5.2.5a

Note (1): The fans are installed at the heat-sink of the bypass static switch. (See section 1.5)

Note (2): The NTC is mounted on the heat-sink of bypass static switch (Figure 5.2.5b). Remove wire #35 and unscrew the NTC.

Fig 5.2.5b

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