www.atkinsonelectronics.com
Circuit Board Division
800.261.3602
9
Revised 09/18
6.
Resetting the GSCM for 60 seconds by shorting terminals 7 and 8 while in the ready mode forces the GSCM back to the
original factory default settings, as it came out of the box. The adjustment LEDs blink once in sequence to indicate a
return to default settings.
7.
An alternate set of test adjustments may be selected by performing step 5 above and holding down the change/ store
button just before releasing the 60 second reset. The change/ store button is then released after the reset jumper is
removed, three of the ten adjustment LEDs blink. The test parameters are:
Maximum crank = 7 seconds - load delay = 20 seconds - pre-cool off delay = 10 seconds
Battery cut-in delay = 1 minute - battery cut-out delay = 2 minutes- 12 hour run time = 1 hour
To exit the test parameters operation the user must perform step 5 above to return to factory defaults.
LED Description and What They Mean
OPERATION LEDS:
Start:
Continuous = manual start signal received
One blink every 5 seconds = ready to receive a command
Slow blink = auto start mode operation
Fast blink = 60 second delay after reset, before ready mode
Generator Hz Shutdown:
Fast blink = over speed; slow blink = under speed
Continuous = start function disabled, AC Hz detected
Three slow blinks = run fault, loss of AC feedback signal after load relay has energized
Emergency Shutdown:
Fast blink = high temperature; slow blink = low oil pressure
Max. Crank Shutdown:
Fast blink = max. 4 crank attempts exceeded; slow blink = 12 hour max. runtime exceeded
ADJUSTMENT & TIMING LEDS:
On continuous = selected for adjustment
0-60 Second Crank Delay:
Blinking = entered crank delay period while glow plug relay K1 energized
0-60 Second Maximum Crank: Blinking = rest period after unsuccessful cranking attempt
0-60 Second Load Delay:
Blinking = generator running, delay period before load transfer
0-120 Second Load Pre-Off:
Blinking = load disconnected, cool down period before shutdown
Battery Charge Cut-In (x12):
Blinking = battery voltage lower than cut-in point, during 5 minute delay
Battery Charge Cut-Out (x12): Blinking = battery voltage greater than cut-out point, during 10 minute delay
15-75Hz Under Hz Shutdown: Blinking = generator Hz (under speed) less than trip point, during 10 second delay
15-75Hz Over Hz Shutdown: Blinking = generator Hz (over speed) greater than trip point, during 10 second delay
15-75Hz Run/Crank Off:
Continuous = adjustment selection; no blinking condition
0-1 Hour 30 Day Exercise:
One blink every minute = 30 day exercise option activated;
Fast blink = 60 second warning before 30 day exercise generator starting
Generator Emergency Shutdown with GSCM
The GSCM Generator Start Controller is NOT AN EMERGENCY SHUTDOWN DEVICE!! Shorting the reset terminals 7 and 8
terminates the current GSCM cycle. See GSCM RESET CONDITIONS section. If the manual start signal is removed the generator will
go through a normal shutdown which may include running for up to two minutes in a load removed cool-down cycle. Also shorting
reset terminals 7 and 8 will shut down the generator in a normal sequence including the cool-down cycle. If the generator has
started but is in the load delay period, applying a reset to terminals 7 and 8 will shut down the generator immediately.
A RECOMMENDED EMERGENCY SHUTDOWN SOLUTION is to install a separate “Kill” switch and label it as such. The recommended
wiring is shown on page 2 of these instructions and also in application 1. Disconnecting the power to the GSCM module will force
the relays to open. This will shut down generators that require a maintained run signal from K3 (ignition) relay. However this also
prevents the K4 (shutdown) relay from closing to shut down those generators requiring a momentary stop signal. Using a double
pole kill switch and wiring the second pole in parallel with the K4 (shutdown) relay terminals will force the generator to stop in an
emergency situation such as a fuel spill.
