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

103

Page 85
Image 85
Tripp Lite SU60KX manual Bypass Sequence NOK, Bypass Static Switch Over Temperature