Table Of Contents - Nilfisk-ALTO NEPTUNE 4 FA Service Manual

Safety Instructions ................................................................. 4
Technical Data ........................................................................ 5
Construction ......................................................................... 17
Side view ...................................................................... 17
Top view ....................................................................... 17
Frame and cabinet ........................................................ 18
Operation panel ............................................................ 19
Panel-inside................................................................ 19
Electrical box ................................................................ 19
PCB A1 ......................................................................... 20
Boiler ............................................................................ 21
Motor - Pump unit ......................................................... 22
By-pass valve ............................................................... 22
Flow control .................................................................. 22
Function ................................................................................ 23
Display .......................................................................... 23
Hot water function......................................................... 25
Sensors and actors....................................................... 26
Motor/pump................................................................... 27
Working pressure.......................................................... 28
By-pass pressure.......................................................... 28
Water reduction ............................................................ 29
Flow control .................................................................. 30
Troubleshooting ................................................................... 31
Boiler performance ....................................................... 33
Service / Repair .................................................................... 34
Observations................................................................. 34
Oil maintenance............................................................ 34
Fuel filter ....................................................................... 34
Electrical system - Maintenance ................................... 35
By-pass system ............................................................ 36
Valves ........................................................................... 37
Cylinder block ............................................................... 39
Wobble disc system...................................................... 41
Electrical motor ............................................................. 43
Fuel tank ....................................................................... 44
Heating system ............................................................. 44
Exhaust temperature sensor......................................... 45
Burner unit .................................................................... 45
Heat exchanger ............................................................ 46
Torque specifications.................................................... 47
Adjustment of by-pass system ...................................... 48
Burner settings.............................................................. 50
Electric settings.....................................................52
Service time settings..................................................... 52
Wiring diagrams ................................................................... 53
Notes ..................................................................................... 62
NEPTUNE 4 FA_EN_Ver.2.0_ 22/11
Index
3