GU641A Controller Operation Manual
13
Stop Failure:
When cool down times out, the fuel relay opens and the timer for Stop delay begins. If the
controller detects that the voltage of the generator or oil pressure or the speed of engine is greater than
the cutout values or LOP switch is open, when it times out, the failure LED illuminates and the LCD
displays
Fail to stop
.
NOTE:
After stop failure, the controller will not energise the crank relay output if the
failure has not been removed and the controller reset.
Generator auto start conditions:
When the controller is in
“
AUTO
”
mode, it will auto start under the following 3 conditions:
l
Mails voltage failure
l
Remote start signal is active
l
MCB failure
If you do not define one of the configurable inputs as Remote Start Signal, when the Mains fails, the
controller will automatically initiate the start sequence.
If one of the configurable inputs has been defined as Remote Start Signal, when remote start signal is
active and Mains fails, the controller will initiate start sequence. However if there is a Mains failure but
remote start input is not active the controller will not initiate start sequence, but the Mains close/open relay
will open.
If Genset has started since
Mains fail to load
, when failure is removed and controller unlocked by
pressing reset button, GCB close/open relay opens, MCB close/open relay closes, transfer switch
switches the load to Mains.
NOTE:
If no configurable input was defined as
Main Aux. Switch closed
, the alarm for
Mains fail to load
is inactive.
4.3 MAN control Sequence:
The controller is running in
“
MANUAL
”
mode.
Mains is normal, Mains is on load:
When Mains is normal means that both voltage and frequency of Mains are within the range of preset
value, the Mains Normal LED illuminates, the MCB close/open relay will not close automatically.
Press the
“
C/O
”
button of Mains to close the Mains switch manually, then Mains is on load, the Mains Aux.
Switch
’
s contact feeds back the signal to a configurable input on our controller, MCB closed LED
illuminates. Press the
“
C/O
”
button of Mains again to open the Mains switch manually, the Mains is off
load, the MCB closed LED is turned off at the same time.
If you press the
“
C/O
”
button of Mains when Gen is on load, the GCB close/open relay will be opened first,
then Gen is off load, the MCB close/open relay closes later, Mains is on load.
NOTE:
When the controller is running in
“
MANUAL
”
mode, Mains must be normal, or the
“
C/O
”
button of Mains will be disabled.
