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GSCM-mini-d

The manual start signal is created by connecting terminal 5 (manual start) to terminal 3 (B+12VDC) through a power/reset

switch. It may also be generated by an Outback Inverter using the AUX+/- connections on the remote terminal block. The

Outback provides a switched +12VDC signal for the GSCM-mini-d manual start input. An optional manual-off-auto switch can

be installed to provide user flexibility for manual starts, resets, turning the unit off, or auto starting from inverter. See GSCM-

mini-d's wiring diagram, upper right hand corner.

GSCM-mini-d

The GSCM-mini-d detects five fault shutdown conditions, they are as follows:

1. Failure to start with 3 cranking attempts (see relay options-1:3, 2:2, & 3:3). The generator Hz shutdown LED does a

double blink and fault LED on continuously.

2. High frequency (over Hz) condition. If the generator AC output is connected to terminals 9 and 10 and the generator

Hz enable terminal 8 is grounded, the GSCM-mini monitors the generators output frequency and if it exceeds the 65

Hz fixed threshold for 10 seconds, the generator shuts down and the generator Hz shutdown LED blinks rapidly. The

generator Hz LED blinks during this 10 second period.

3. Low frequency (under Hz.) condition. If the generator AC output is connected to terminals 9 and 10 and the generator

Hz enable terminal 8 is grounded, the GSCM-mini monitors the generators output frequency and if it drops below the

55 Hz fixed threshold for 10 seconds, the generator shuts down and the generator Hz shutdown LED blinks slowly. The

generator Hz LED blinks during this 10 second period.

4. Auto Start within 30 minutes of max run time shutdown. The generator Hz shutdown LED does a triple blink and fault

LED on continuously.

5. Generator shuts down on its own fault. While the GSCM-mini is in run mode, and the generator is running, if the

generator shuts down on a fault condition (low oil pressure, hi temperature, or out of fuel) or the AC Hz signal fuse or

wire opens or the 12V run status wire opens, the GSCM-mini goes thru its shutdown routine and enters a fault

condition, turning on the red fault LED and blinking the generator Hz LED four times every two seconds.

The over/ under Hz detection not enabled until the generator has been running for 60 seconds and will shut down the

generator after 10 continuous seconds of Hz fault condition, locking it out until a power down reset and power back up. The

fault open collector transistor output (terminal 12) will energize a user supplied remote lamp or DC relay (not exceeding 300

milliamp coil current) whenever a fault shutdown occurs and will de-energize the relay when the fault is reset.

www.atkinsonelectronics.com

800.261.3602

Manual-Off-Auto Switch Options

Fault Shutdown Conditions

Circuit Board Division

Revised 11/2020