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 7-72DE
When the key (S1) is turned to the ”ON” position, the glow timer (Tim1), and the glow relay (K3) is
activated, and the glow plugs (R1) are heating, and also the glow lamp on A2 is lightening. After a
short while the timer runs out and the glow relay opens.
Now the key can be turned to the start position, and the starter coil (Y2—red wire), together with the
holding coil (Y2—white wire) is pulled and runs the starter motor, and the motor will start.
Now release the key, so it goes back to the “ON” position, the starter coil (Y2—red wire) is no longer
pulled, but the holding coil (Y2—white wire) is kept hold through the contactor (K3).
If there is a failure on B5 (oil level switch pump oil), B10 (Motor oil switch), B11 (thermo switch mo-
tor) or B12 (thermo switch high pressure pump), output 15 on A2 is connected to ground, contactor
K3 opens and the holding coil Y2 opens and the motor stops.
It is important that the jumper is mounted on the circuit board (A2). When jumper mounted there is
12VDC on output 7 on A2. Output 7 is connected to connection “R” on the generator. The generator
(G1) can only give output, if there is 12VDC present on connection “R”. If the generator is “worn/
defect” the DC voltage on connection “L” drops down to 0 VDC, and input 6 on A2 in then connected
to ground, and the charging LED will light up.
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