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Hipulse - Single Phase ‘1+N’ UPS System 130 kVA - 110V
57
7.2 Display Panel Messages
The message displayed on Hipulse can be categorized into types:-
(a) ALARM messages - these are messages which needed 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 the messages generated to warn or confirm to
the operator of action 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.
Sr. No. Display Message Alarm Interpretation
1. 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 operation action – investigate the cause
for pressing the button. If this button was not pressed then check
the continuity of the circuit to the Remote switch, Customer
connections, Auxiliary terminal block X4; pin 5 and 6; normally
closed.
2. INV. OFF 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.
3. INV: OVERVOLTAGE
INV: UNDERVOLTAGE
OUTPUT: NO VOLTAGE
OUTPUT: WAVEFORM ERR
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.
4. INV. OVERTEMPER. Over temperature is sensed by a normally-closed thermostat (90°C
operating) 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.
5. OVERTEMP. SHUTDOWN This message informs the operator that the inverter has been
switched OFF and that the load has been transferred ot Bypass due
to an Inverter over temperature.
6.
OVERLOAD PRESENT
The inverter overload has an inverse load/ time characteristic – i.e.
it will accept 125% overload for 10 minutes and 150% overload for
60 seconds. If this characteristic is exceeded the load transfers to
the bypass supply, the inverter stops and the overload alarm
annunciates. The [OVERLOAD PRESENT] alarm will annunciate as
soon as the load exceeds 100% of the UPS rating, and the load will
transfer to Bypass some time later, depending on the degree of