Liebert 130 kVA - Manual (Page 79)

User Manual
Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V
59
14. BATTERY: E.O.D. Battery discharge has continued beyond a preset value. The
inverter will shut down, the system will attempt a transfer to bypass.
If Bypass is not available, any load connected to the UPS will be
without power.
15. RECT. OFF The RECT. OFF alarm is active whenever the battery charger
(rectifier) is not producing its correct output voltage. This can be
caused by an operator selection to OFF, an Input supply failure, an
open rectifier a.c. input power switch or an internal fault which may
be accompanied by one of the fault conditions.
16. RECT. SWITCH OPEN
RECT. CURRENT LIMIT
BATTERY: FUSE FAIL
DC BUS: FAST OVERVOL Most of the rectifier fault messages are self explanatory however,
the DC BUS: FAST OVERVOLTAGE message informs the operator
the d.c. busbar voltage is too high.
17. BYP. ABSENT
BYP. OVERVOLTAGE
BYP. UNDERVOLTAGE
BYP. FREQUENCY ERROR INPUT FAILURE: input a.c. supply failed or out of specified
acceptable range. Do not switch OFF the inverter while this
indication is active or the load will lose its power.
18. BYP. SCR FAILURE One or more of the static switch SCR’s has developed a fault. The
bypass would not support the load in the event of a UPS failure,
immediate action is required. Seek qualified assistance.
19. BYP. PHASE ROT. ERROR This message informs the operator that the input power lines have
been cross-connected and the phases sequence is incorrect.
20. MANUAL BYPASS CLOSED This is a status warning that the load is being powered through the
maintenance bypass line and is unprotected from mains supply
aberrations.
21.
INV. UNSYNCHRONIZED
This warns that the inverter is not synchronized with the bypass
supply, which is normally due to a problem with the bypass supply
being outside an acceptable frequency window. Do not switch OFF
the inverter when this alarm is active or the load will experience a
200 millisecond power break.