Specifications

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INSTALLATION AND POWER-UP
After all of the connections have been made, and the unit has been mounted securely, the
SST-4 is ready to be powered up. The following procedure describes the power up and
initial checkout.
With the ignition switch in the ON position, turn on the “Master” switch to power up the
SST-4. On initial power up the SST-4 will perform a self-diagnostic test to verify that all of
the functions are operating correctly. If a ashing “SP” is reported, the master switch was
turned on with the ignition switch in the off position. Turn on the iginition switch, and then
hold down the UP and DOWN buttons simultaneously for 5 seconds to clear the fault.
If no faults are detected, the SST-4 will go into “Run mode” and the hour meter readout will
be visible on the display (refer to Table 1).
If a fault is detected on power up, a code will be ashing on the display indicating in which
circuit the fault has occurred. For assistance in troubleshooting, please refer to the trouble
shooting section.
After all of the faults have been cleared and the SST-4 is operating in normal mode, apply
signals to test the proper function of the SST-4. Table 1 outlines the different display
codes and the operations which they indicate. Apply signals as available to ensure proper
operation of each function.When checking signals, verify the status of various signals on
the board by using the green display indicators, shown in and detailed in Table 2.
1.
2.
3.
4.
5.
Display Flashing Description
Yes Board power only, Master switch is off.
No
Run mode (hour meter display) Note: If hour meter is
counting, the decimal ashes. If not counting, decimal
does not ash.
No Stop mode
No Start signal active, glow plugs on
No Start signal active, starter on
No Throttle Plunger input active
No Emergency Power input active
Table 1. Display during normal operations
LED # Description On Indicates
D2
Start/Stop or Throttle
Input
An input trigger is applied to Start/Stop or Throttle
D3 Throttle Relay #1 Relay is enabled
D4 Throttle Relay #2 Relay is enabled
D5
Start Relay Relay is enabled, power at START OUT on TB1.
D6 AUX Relay (E-Pump) Relay is enabled, power at AUX OUT on TB1.
D7 Ignition Relay is enabled, power at IGN OUT on TB1.
Table 2. SST-4 Green LED indicators.