SEAL-VALVE STEM 1977006 - Caterpillar

SP fault codes are associated with the spare inputs. SP fault codes are either alarm faults or shutdown faults. The four spare inputs and a spare output are for meeting the needs of the customer.
The active state can be programmed to be high or low.
The SP fault code can be designated as an alarm fault.
The SP fault code can be designated as a shutdown fault.
Delay time can be programmed.See Systems Operation, "Spare Input/Output Programming OP6". The spare inputs consist of SP1 through SP3. Also, the corresponding SP fault codes consist of SP1through SP3.Alarm Mode Sequence Of Operation - The following procedure happens when a fault occurs in a spare input with the fault that is programmed as an alarm fault.
The GSC waits for the end of the time delay.
The fault alarm indicator FLASHES.
When the alarm codes key is pressed, the corresponding fault code SP1, SP2 or SP3 is shown on the upper display.
The engine continues to run or the engine is able to start.Shutdown Mode Sequence Of Operation - When a fault occurs in a spare input the spare input is active. If the spare input is programmed as a shutdown fault, then the GSC will operate in the following manner.
The GSC waits for the end of the time delay.
The fault shutdown indicator FLASHES.
The corresponding fault code SP1, SP2 or SP3 is immediately shown on the upper display of the GSC.
The engine is shut down or the engine is disabled from starting.The fault shutdown indicator remains FLASHING. The SP fault code remains shown until the ECS is turned to "OFF/RESET". After turning the ECS to "OFF/RESET" and correcting the cause of the spare fault, the engine is able to run. Note: Spare faults are not logged into the GSC fault log.Note: Spare faults that are programmed to shut down the engine are ignored by the GSC when the engine speed is less than the crank terminate speed.