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GENERATOR START CONTROL MODULE - MINI (2 Wire to 3 Wire)

GSCM-mini MOMENTARY STARTING SEQUENCE (Relay Option #1)

The GSCM-mini 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 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 form 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 detects an AC signal from

the generator before a start command is given (ie: the generator is already running) it will not execute a start sequence until the

AC Hz. signal has been rectified, and will turn ON the Generator Hz LED. The generator starting sequence is as follows.

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, 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.

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.

If the generator fails to start after 3 cranking attempts with the associated resting periods, then K2 relay closes for 5 seconds,

then the Gen Hz LED does a double blink, the Fault LED turns ON and the GSCM-mini enters the Max. Crank lockout

condition. This lockout condition remains until the GSCM-mini is reset by removing power from terminal 2 (see GSCM-mini

wiring diagram, previous page) and reconnecting power. The GSCM-mini will then clear the lockout condition, and enter

"Ready" mode with the Start LED blinking Every 5 seconds.

When the generator starts, K1 relay immediately opens, stopping the cranking. A valid run condition is determined by the

generator AC output frequency exceeding the crank disconnect setting of 45Hz and is indicated with the Run LED turned On..

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 5 minute delay period in auto-start mode.

When a run condition is detected, the GSCM-mini turns ON the Run LED and transistor output (remote run lamp) and after

a 60 second generator stabilization period begins monitoring the AC Hz signal for over/under Hz condition.

If the generator starts but shuts down after the 60 seconds stabilization period, due to a fuel problem, etc. the GSCM-mini

blinks the Gen Hz LED for an Under Hz condition , after 60 seconds the Run LED turns Off, Fault LED turns On, and K2 relay

energizes for 5 seconds. The GSCM-mini enters a Fault shutdown lockout condition. A power down reset is required to clear

the lockout condition.

The generator continues running until one of the following occurs: the manual start signal is no longer received, the auto

battery charge voltage 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. (No run time limit)

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 MAINTAINED STARTING SEQUENCE (Relay Option #2)

The CONFIGURATION terminal 6 has been connected to ground (terminal 7), configuring the GSCM-mini for maintained start

sequence. The GSCM-mini is then powered by connecting B+ (12.0 VDC) to terminal 2. After 10 seconds the GSCM-mini indicates

that it is ready to receive a start signal by blinking the start LED once every 5 seconds. The generator starting sequence is as

follows.

The start LED blinks once every 5 seconds to indicate that the GSCM-mini 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.

If the generator fails to start after a single 1 minute start period, GSCM-mini enters its Shutdown Routine, then the Gen Hz

LED does a double blink, the Fault LED turns ON and the GSCM-mini enters the Max. Crank lockout condition. This lockout

condition remains until the GSCM-mini is reset by removing power from terminal 2 (see GSCM-mini wiring diagram), and

reconnecting power. The GSCM-mini will then clear the lockout condition, and enter "Ready" mode with the Start LED

blinking Every 5 seconds.

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.

If the generator starts but shuts down after a few seconds due to a fuel problem, etc. The GSCM-mini goes thru it's Shutdown

Routine then re-enters "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 5 minute delay period in auto-start mode.

ATKINSON ELECTRONICS, INC.

Web Site: www.atkinsonelectronics.com

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GSCM-MINI

SECTION - 1

SECTION - 2

REV 9/05