Nilfisk-ALTO NEPTUNE 5-46 PE, Service Manual

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NEPTUNE PE-DE_en_Ver.1.0_October 2010
Function
Functional desription of NEPTUNE 7-66DE
When the key (S1) is turned to start, the start relay is pulled and the motor starts. Then let go the
key, and it moves back to the ”ON” position.
The motor oil pressure switch (B10) is a normally closed switch. In closed position (motor not run-
ning) the switch is connected to ground. When the motor starts and the RPM increases the motor oil
pressure increases the switch opens and there is no connection to ground anymore. When no con-
nection to ground there is no ground on output 15, which means the motor runs.
If output 15 is connected to ground 5 sec. after the key is turned back to “ON” position, contactor K3
is pulled, and the fuel pump is disconnected for 9 sec. (done by TIM 2—Timer for motor stop) —
motor stops.
If there is a failure on sensor B5, B 10 or B11, and by that output 15 is connected to ground, the fuel
pump will be disconnected in 9 sec., and the motor will stop.
If the 12V charging is not functioning input 6 on A2 will be connected to ground.
IMPORTANT: JUMPER ON A2 MUST BE MOUNTED
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