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8
Revised 11/2020
GSCM-mini-d Relay Option 3 Ignition and Crank Starting Sequence
The configuration terminal 6 has been connected to B+ (terminal 3), configuring the GSCM-mini-d for ignition/crank start
sequence. The GSCM-mini is then powered by connecting B+ (+12 VDC) to terminal 2. The start LED turns on for 5 seconds
while the GSCM-mini initializes with option #3 ignition/crank starting sequence then begins blinking the start LED once every 5
seconds . The generator starting sequence is as follows:
1.
The start LED blinks once every 5 seconds to indicate that the GSCM-mini is in a ready mode. When a manual signal is
received, the start LED lights continuously. After a 2 second delay, K2 relay energizes and remains energized until the
start signal is either removed or the generator fails to start after 3 attempts. K1 relay closes to crank the starter. The
K1 relay remains closed until either the generator starts or the maximum cranking time period (20 seconds) is
reached.
2.
If the generator fails to start after the 20 seconds cranking period, K1 relay opens for a resting period of 40 seconds.
The K1 relay then closes again cranking the starter until the maximum cranking time is reached or the generator
starts.
3.
If the generator fails to start after 3 cranking attempts with the associated resting periods then K2 relay de-energizes
and enters its shutdown routine, then the generator Hz LED does a double blink, the fault LED turns ON and the
GSCM-mini enters the maximum crank lockout condition. This lockout condition remains until the GSCM-mini is reset
by removing power from terminal 2 (see GSCM-mini wiring diagram page 4) and reconnecting power. The GSCM-mini
will then clear the lockout condition, and enter ready mode with the start LED blinking every 5 seconds.
4.
When the generator starts, K1 relay immediately opens, stopping the cranking. A valid run condition is determined by
one of two conditions: A 12V run pilot light signal provided by the generator connected to terminal 8, or by the
generators AC output frequency exceeding the crank disconnect setting of 45Hz (terminals 9 & 10) and is indicated by
the run LED being turned ON.
5.
If the generator starts but shuts down after a few seconds due to a fuel problem, etc., the start sequence will revert
to the ready mode after a 60 second delay. During this delay the start LED will blink rapidly. The GSCM-mini will then
try to start the generator again in manual mode or after a 10 minute delay period in auto-start mode.
6.
When a run condition is detected, the GSCM-mini turns ON the run LED and open collector transistor output (remote
run lamp) and after a 60 second generator stabilization period begins monitoring the AC Hz signal for over/under Hz
condition.
7.
If the generator starts but shuts down after the 60 seconds stabilization period, due to a fuel problem, low oil
pressure, broken AC Hz or 12V run status wire, the GSCM-mini blinks the generator Hz LED for an under Hz condition,
after 60 seconds the run LED turns off, K2 relay energizes for 5 seconds, and fault LED turns on and the generator Hz
LED blinks four times every two seconds. The GSCM-mini enters a fault shutdown lockout condition and must be
powered down to reset the fault lockout.
8.
The generator continues running until one of the following occurs: The manual start signal is no longer received, the
auto battery charge voltage or max run time has been reached while running in auto charge mode, an over or under
Hz condition occurs (if generator Hz shutdown is enabled) or the generator runs out of fuel.
When the manual start signal is removed, K2 relay de-energizes opening the ignition circuit shutting down the generator. The
GSCM-mini then monitors the generator AC Hz input to watch for a zero Hz condition before returning to ready mode. If the
AC signal remains the GSCM-mini’s generator HZ LED turns on indicating AC Hz. Signal still present and will not return to ready
mode until the AC signal goes to zero. Once it goes to zero the GSCM-mini returns to ready mode.
