EN-KO Electronic Control Systems
AMF 4.0/ENG/K.K./02
9
ALARMS
Alarms are divided to red and yellow alarms. Yellow alarms are for warning purposes and
don’t stop the generator. Red alarms are serious and if occur generator contactor is opened
and generator is stopped immediately.
High and low speed (RED ALARM):
If alternator frequency is higher than
“generator over frequency failure” or is lower than “generator under frequency
failure” “panel switches to this alarm. Alarm is activated after “generator
frequency failure delay”.
High and low alternator voltage (RED ALARM):
If alternator voltage is higher
than “generator over voltage failure” or is lower than “generator under voltage
failure” “panel switches to this alarm. Alarm is activated after “generator voltage
failure delay”
High coolant temperature (RED ALARM):
If temperature that is read from
temperature sender is higher than “high coolant temperature level” or if
temperature switch sends alarm to panel. Panel switches to high coolant
temperature alarm.
Over current failure (RED ALARM):
If currents values read from current
transformers is higher than “over current level”. Generator contactor is opened and
generator switches to cooling. After cooling stage generator stops. Alarm is
activated if condition continues for “over current alarm delay”
Periodic service:
When periodic service time elapsed after last periodic service.
Alarm is displayed. Only service personnel can reset alarm.
Fail to start stop:
If this alarm occurs that means panel couldn’t start or stop
engine. All engine signals must be absent and engine must be still before cranking.
If one of the engine signals is detected, before cranking, panel switch to start and
stop alarm. Panel will show which signal is detected with engine start stop alarm.
If oil pressure signal is detected before cranking panel will wait for it to decrease
to zero. If “before cranking oil pressure delay” is elapsed and oil pressure is not
zero panel will switch to start and stop alarm. In automatic and test modes if
generator couldn’t be started after user defined crank attempts, panel switches to
fail to start stop alarm. In engine stopping stage if panel still detects engine signals
after “fail to stop delay”. Panel switches to fail to start stop alarm. Alarm led lamps
indicates which engine signal is still present and causes fail to start stop alarm.
Low oil pressure (RED ALARM):
If oil pressure that is read from oil pressure
sender is lower than “low oil pressure level” or if oil pressure switch sends alarm
to panel. Panel switches to low oil pressure alarm.
Charge Failure (YELLOW ALARM):
If charge voltage read from charge
alternator warning lamb terminal decreases, panel switches to this alarm. This
alarm doesn’t stop generator.
V
Battery high and low voltage (YELLOW ALARM):
If battery voltage is higher
than “battery high alarm level” or is lower than “battery low alarm level” panel
switches to this alarm. This alarm doesn’t stops engine.
AUX.
Auxiliary input (YELLOW or RED ALARM):
When an auxiliary input alarm
occur. This led is lit and A1, A2, A3 or A4 message is written to display. A1
means auxiliary input1 alarm.
