Liebert 7200 Series User Manual page 75

7200 Series UPS User Manual
Single Module and 1+1 Parallel System
DISPLAY ALARM
MESSAGES
15 RECT.: OFF
16 RECT.: SWITCH OPEN
RECT.: CURRENT LIMIT
BATTERY: FUSE FAIL
DC BUS: FAST OVERVOL
17 BYP: ABSENT
BYP: OVERVOLTAGE
BYP: UNDERVOLTAGE
BYP: FREQUENCY ERROR
18 BYP: SCR FAILURE
19 BYP: PHASE ROT.ERROR
20 CONTACTOR FAILURE
21 INV.: PARALLEL ERROR
22 MANUAL BYPASS CLOSED
23 INV.: UNSYNCHRONIZED
24 BATTERY: ON LOAD
25 AUTONOMY XXXX min
26 BATTERY: UNDER TEST
27 BOOST TIME EXPIRED
28 LOAD ON BYPASS
29 RECT.: OFF
RECT.: OFF VIA DISPLAY
30 BYP.: OFF
BYP.: OFF VIA DISPLAY
31 INV.: OFF
INV.: OFF VIA DISPLAY
32 BYP:XFER COUNT BLOCK
In addition to the above messages there are a number of software alarms (i.e. BAD EEPROM ,
BACK-UP BATTERY LOW etc.) that will require attention from a qualified service engineer.
document in response to "powersure ups"
available, any loads still connected will be without power.
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.
Most of the rectifier fault messages are self explanatory however, the DC BUS: FAST
OVERVOLTAGE message informs the operator the d.c. bus bar voltage is too high.
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.
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.
This message informs the operator that the input power lines have been cross-
connected and the phases sequence is incorrect.
The contactor has not closed on load at the correct time: probably the load is on
bypass, if allowable. Seek qualified assistance.
This message has meaning only on paralleled 1+1 system: the parallel board has
detected a wrong sharing of the load and has blocked its inverter. Seek qualified
assistance..
This is a status warning that the load is being powered through the maintenance
bypass line and is unprotected from mains supply aberrations.
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 msec power break.
This is a status warning that the battery is discharging. It normally accompanies a
[BYP: ABSENT] or [RECT: OFF] message.
The micro monitors the battery percentage capacity while on charge and the battery
time remaining while on discharge. It calculates the time remaining as function of the
discharge current against the programmed ampere hour capacity of the battery. It will
update the time remaining as the load is changed
This message informs the operator that the system is carrying out a periodic battery
test.
This message is only applicable to systems which include the boost charge option,
boost time charge elapsed set value, battery should be controlled by service personnel.
This is a status warning that the load is being powered through the static bypass line
and is unprotected from mains supply aberrations.
This action is either selected by the operator or a fault condition, check for other fault
messages.
This is a status message confirming that the rectifier has been selected off by the
operator from either the front panel display or an external PC or by a switch on UPS
µP PCB.
This is a status message confirming that the bypass has been inhibited by the operator
from either an external PC or by a switch on UPS µP PCB.
This is a status message confirming that the inverter has been selected off by the
operator from either the front panel display or an external PC or by a switch on UPS
µP PCB.
This message informs the operator that the load has been transferred to the bypass
more than eight times in one minute. After eight transfers the load will remain on
bypass. This message could be initiated by a load causing the UPS to overload, it
requires investigation.
Dispaly panel message interpretation
INTERPRETATION
Chapter 6 - Trouble shooting
Page 6-5
Issue 6
(03/98)