54 Shield T3 60 – 500KVA User Manual
increase the bypass high limit set point according to the
user’s suggestions
19
Bypass Module
Fail
Bypass Module Fails. This fault is locked until power off. Or
bypass fans fail.
20
Bypass Module
Over Load
Bypass current is over the limitation. If bypass current is
under 135% of the rated current. The UPS alarms but has no
action.
21
Bypass Over
Load Tout
The bypass overload status continues and the overload
times out.
22
Byp Freq Over
Track
This alarm is triggered by an inverter software routine when
the frequency of bypass voltage exceeds the limit. The
alarm will automatically reset if the bypass voltage becomes
normal.
First check if relevant alarm exists, such as “bypass circuit
breaker open”, “Byp Sequence Err” and “Ip Neutral Lost”. If
there is any relevant alarm, first clear this alarm.
1. Then check and confirm if the bypass frequency displayed
on the LCD are within the setting range. Note that the rated
frequency are respectively specified by “Output Frequency”.
2. If the displayed voltage is abnormal, measure the actual
bypass frequency. If the measurement is abnormal, check
the external bypass power supply. If the alarm occurs
frequently, use the configuration software to increase the
bypass high limit set point according to the user’s
suggestions
23
Exceed Tx Times
Lmt
The load is on bypass because the output overload transfer
and re-transfer is fixed to the set times during the current
hour. The system can recover automatically and will transfer
back to the inverter with 1 hour
24
Output Short
Circuit
Output shorted Circuit.
Fist check and confirm if loads have something wrong.
Then check and confirm if there is something wrong with
terminals, sockets or some other power distribution unit.
If the fault is solved, press “Fault Clear” to restart UPS.
25
Battery EOD
Inverter turned off due to low battery voltage. Check the
mains power failure status and recover the mains power in
time
26
Battery Test
System transfer to battery mode for 20 seconds to check if
batteries are normal
27
Battery Test OK
Battery Test OK
28
Battery
Maintenance
System transfer to battery mode until to be 1.1*EOD
voltage to maintenance battery string
29
Battery
Maintenance OK
Battery maintenance succeed
30
Module inserted
Power Module is inserted in system.