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105
PRELIMINARY
5.2 Troubleshooting Flow Charts (continued)
5.2.8 “UPS INTERNAL COMM ABNORMAL”
5 Troubleshooting (continued)
Fig 5.2.8a
Fig 5.2.8b
Note (1): Check W2A, W2B, W2C, W2D, W4A, W4B and W6 (Fig 5.2.8b).
Note (2): Remove wires W61A, W65A and W68A.
Start
Has the
communication wire
slipped ?
(1)
Re-insert communication
wire and try again
N
Y
END
Remove power connection
of power module #1
(2)
Still getting the
same fault message?
Re-insert power connection
of previous power module
and remove the next power
module’s connection
Replace the power module
N
Y
W61A
W65A
W2A
W5
W3A
W4A
W6
W2B
W6
W6
W2C
W6
W6
W2D
W6
W4B
W5
W5
W5
W5
W5
W2B
W68A
W62B
W66B
W69B
W63C
W67C
W70C
W64D
W36D
W71D