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 5-46PE, 5-54PE and 7-61PE
Circuit board (A2) is monitoring the thermostat on the high pressure pump (15), the motor
oil switch (8) and the oil level switch in the high pressure pump.
If the thermostat on the pump or the motor oil switch is closing (failure) is respectively in-
put 9 and input 8 connected to ground, which causes the LED to light, and at the same
time output 15 is connected to ground.
If the oil level switch closes (failure) input 5 is connected to ground, output 15 is also con-
nected to ground, which pulls the relay (6) and the motor stops. Also the LED for low oil
level will light up.
On this model it is important that the jumper on A2 (2A) is NOT mounted.
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