User Manual Liebert Hipulse E Chapter 10 - Display Panel Interpretation
Single or '1+N' UPS System
(07/04) Page 10-3
10.2 Display panel messages
The messages displayed on the Liebert Hipulse E can be categorized into two types; (a) ALARM messages these are
messages which need urgent attention and warn of a UPS shutdown or imminent shutdown the load would normally
transfer to the bypass supply if it is available. All alarm messages are accompanied by an audible warning. (b)
WARNING messages these are messages generated to warn or confirm to the operator of actions taken ( i.e. if the
rectifier a.c. input supply power switch was opened the Warning message would read RECTIF. SWITCH OPEN ).
The following table lists the various messages displayed on the operator panel together with a description of their
interpretation.
Alarm
code
DISPLAY ALARM
MESSAGES
INTERPRETATION
63 EMERGENCY STOP This alarm indicates that the UPS was shut down by means of the local or remote (if
fitted) Emergency Power Off push button ( EPO ) which is normally due to operator
action - investigate why the emergency power off push button was pressed.
If the emergency power off push button was not pressed then check the continuity of
the circuit to the remote switch. Customer connections; auxiliary terminal block X4;
pins 5 and 6; normally closed.
30
36
37
41
42
43
INV.: OFF
INV.: OVERVOLTAGE
INV.: UNDERVOLTAGE
OUTPUT: NO VOLTAGE
OUTPUT: WAVEFORM
ERR
INV: FREQUENCY
ERROR
The INV.: OFF alarm is active whenever the inverter is not producing its correct
output voltage; either because it has been switched OFF or due to an internal fault, it
will normally be accompanied by one or more of the other inverter fault conditions.
Most of the inverter fault messages are self explanatory however the WAVEFORM
ERR. informs the operator that the output voltage peak has flattened caused by an
internal inverter problem and therefore the output will be out of limits.
The FREQUENCY ERROR message indicates an error in the output frequency of the
inverter.
34
62
INV.: OVERTEMPER.
OVERTEMP.
SHUTDOWN
Over temperature is sensed by a normally-close thermostat fitted to each inverter heat
sink. If an over temperature condition arises, the audible alarm will accompany this
message: the inverter stops and load transfers to bypass after 3 minutes.
This message informs the operator that the inverter has been switched off and that the
load has been transferred to bypass due to an inverter over temperature.
66
61
OVERLOAD PRESENT
OVERLOAD
SHUTDOWN
The inverter overload alarm will annunciate as soon as the load exceeds 100% of the
UPS rating,. The load will eventually transfer to the bypass mains supply if the
overload condition is present for greater than a predetermined time
This message informs the operator that the load has transferred to bypass due to an
inverter overload.
03 OUTPUT SWITCH OPEN This is a status alarm. The output switch must be selected `CLOSED' at all times
except when operating on the maintenance bypass supply
02 BYPASS SWITCH OPEN This is a status alarm. The bypass input switch must be closed at all times.
05 BATTERY C.B. OPEN This is a status indication only. Note that if the UPS is operating with the battery
circuit breaker open and the mains power fails then the UPS output will also fail
together with load power, since the inverter has no battery back-up.
57 BATTERY: FUSE FAIL This problem should be rectified as soon as possible. If the mains power fails then the
UPS output will also fail together with load power, since the inverter has no battery
back-up.
51 BATTERY: TEST
FAILED
The system has carried out a test of the battery. If this alarm is not accompanied by a
[BATTERY C.B. OPEN] or [BATTERY: FUSE FAIL] message then a full check of
the battery bank is required
56 DC BUS:
UNDERVOLTAGE
When the inverter is operating on the battery this message is displayed when the
battery voltage has fallen below a preset value. If the input a.c. power cannot be
restored you should shut down your loads.
53 BATTERY: E.O.D. Battery discharge has continued beyond a preset value. The inverter will have shut
down, the system will attempt a transfer to bypass: if there is no bypass supply
available, any loads still connected will be without power.
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