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No.
Alarm Message
28
BYPASS INPUT
PHASE SEQ NOK
29
BYPASS STS
OVER CURRENT
30
BYPASS STS FAIL
31
EMERGENCY
POWER OFF
32
PWR UNIT #n
COMMUNICATION
NOK
33
EXT PARALLEL
COMMUNICATION
NOK
34
PARALLEL FAIL
35
ON MANUAL
BYPASS
36
REDUNDANCY
LOSS
Possible Cause
Wrong wiring.
The UPS is overloaded.
1. Bypass static switch is
damaged.
2. Bypass driving circuit is
damaged.
Emergent shutdown is
executed.
1. Internal communication
ca
connected.
2. Communication circuit is
abnormal.
connected.
1. Parallel UPSs are not
compatible.
2.
parallel UPSs' IDs.
The Manual Bypass Switch
(Q3) is turned on.
Overload causes redundancy
failure.
11- 5
Check if the bypass AC source's wiring
and phase sequence are correct. If
not, contact service personnel.
Decrease some critical loads.
Contact service personnel.
Shut down the UPS. After emergency
events are eliminated, follow turn-on
procedures to start up the UPS.
Contact service personnel.
connected or not. If not, connect it
parallel UPSs' IDs. If yes, contact
service personnel.
tween
2. Check if parallel UPSs are
compatible or not. If not, contact
service personnel.
1. Check if the Manual Bypass Switch
(Q3) is turned on. If yes, turn it off.
2. If the Manual Bypass Switch (Q3)
is turned off and the alarm still
exists, contact service personnel.
Decrease critical loads and reset
redundancy.
11
Troubleshooting
Solution
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