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GENERATOR START CONTROL MODULE - MINI (2 Wire to 3 Wire)
GSCM-mini-D MOMENTARY STARTING SEQUENCE (Relay Option #1)
The GSCM-mini-D indicates that it is ready to receive a start signal by blinking the start LED once every 5 seconds. The
CONFIGURATION terminal 6 has NO connection, configuring the GSCM-mini-D for momentary start sequence. The start signal is
created by closing a switch connected between the manual start terminal 5 to B+ terminal 3 or connecting the Aux + and Aux -
terminals from an Outback Inverter to terminal 5 (start) and terminal 7( ground). The module may also start in automatic mode based
on a battery voltage (see Section-6 for Automatic start for battery charging). If the GSCM-mini-D detects an AC signal from the generator
before a start command is given (ie: the generator is already running) it will turn ON the Generator Hz LED, and not execute a start
sequence until the AC Hz. signal has been rectified. The generator starting sequence is as follows.
1.
The start LED blinks once every 5 seconds to indicate that the GSCM-mini-D is in a "Ready" mode. When a manual signal is
received, the start LED lights continuously. After a 2 second delay, K2 relay closes for 10 seconds, causing the 3 wire diesel
generator glow plug(s) to heat. K2 relay then opens and K1 relay closes to crank the starter, and remains closed until either the
generator starts or the maximum cranking time period (20 seconds) is reached.
2.
If the generator fails to start during the 20 seconds cranking period, K1 relay opens for a resting period of 40 seconds. At the end
of the resting period K2 relay then closes for 10 seconds, heating the glow plug(s), after the ten second glow period K2 opens and
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, the K2 relay then closes for 5 seconds
to ensure the generator is not running, the Gen Hz LED does a double blink, the Fault LED turns ON and the GSCM-mini-D enters
the Max. Crank Lockout Fault condition. This lockout condition remains until the GSCM-mini-D is reset by removing power from
terminal 2, waiting 5 seconds and then reconnecting power (see GSCM-mini-D wiring diagram, previous page). This clears the
lockout condition, and the GSCM-mini-D enters "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: the generators AC output frequency exceeds the crank disconnect setting of 45Hz (terminals 9 & 10) or by a 12v run
status signal provided by the generator connected to terminal 8. The GSCM-mini-D indicates that it has received either signal by
turning on the Run LED.
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-D will then try to start the
generator again in manual mode or after a 5 minute delay period in auto-start mode.
6.
When a run condition is detected, the GSCM-mini-D turns ON the Run LED and transistor output (remote run lamp terminal) and
after a 60 second generator stabilization period begins monitoring the AC Hz signal for over/under Hz condition, if enabled.
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-D blinks the Gen 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 Gen Hz LED blinks four times every two seconds. The
GSCM-mini-D enters a Fault shutdown lockout condition and must be powered down to reset the fault lockout.
8.
If no Faults occur, the generator will continue to run until one of the following occurs: the manual start signal is no longer received,
the auto battery charge voltage or Max Auto Run time has been reached while running in Auto Charge Mode, an Over or Under
Hz condition occurs (If Gen. Hz. Shutdown is enabled) or the generator runs out of gas.
9.
During shutdown, K2 relay closes to ensure shutdown of the generator by grounding out the ignition, etc. It remains closed until
the AC Hz signal from the generator has gone to zero for 5 seconds ensuring that the generator has shutdown.
10. The generator remains off until another start signal is received.
GSCM-mini-D MAINTAINED STARTING SEQUENCE (Relay Option #2)
The CONFIGURATION terminal 6 has been connected to ground (terminal 7), configuring the GSCM-mini-D for maintained start
sequence. The GSCM-mini-D is then powered by connecting B+ (12.0 VDC) to terminal 2. The Start LED turns on for 5 seconds while
the GSCM-mini-D initializes with option #2 maintained 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-D is in a "Ready" mode. When a manual start signal
is received, the start LED lights continuously. After a 2 second delay, K1 relay closes to start the generator. The K1 relay remains
closed until either the start signal is removed or the maximum cranking time of 1 minute is reached.
2.
If the generator fails to start after a single 1 minute start period, GSCM-mini-D runs thru its Shutdown Routine, the Fault LED turns
ON and the GSCM-mini-D enters the Max. Crank lockout condition and the Gen Hz LED does a double blink. This lockout condition
remains until the GSCM-mini-D is reset by removing power from terminal 2 (see GSCM-mini-D wiring diagram), waiting 5 seconds
and reconnecting power. This clears the lockout condition, and returns to "Ready" mode.
3.
When the generator starts, K1 relay remains energized. A valid run condition is determined by the generator AC output frequency
exceeding the crank disconnect setting of 45Hz and is indicated by the Run LED being turned ON.
ATKINSON ELECTRONICS, INC.
Web Site: www.atkinsonelectronics.com
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GSCM-MINI-D
SECTION - 1
SECTION - 2
REV 07/08