Nilfisk-Advance Captor 4800 - Hopper will Not Lower

38 - FORM NO. 56043093 / Captor
™
4300, 4800, 5400
HOPPER SYSTEM
TROUBLESHOOTING GUIDE
Possible Symptom
1 Hopper will not lower
Part A: Electrical
Note: Do all testing with the key switch turned ON, and the hopper lower switch pressed on the display panel.
Hopper will not lower
Press and hold hopper lower
switch. Is its green indicator
light on?
Substitute a new A2
display panel.
Does the hopper lower?
Check for 12 volts at
L14 hopper lower coil.
Wire colors
(+) ORG
(-) YEL/RED
Repair or replace L14
coil wiring.
Does the hopper lower?
Check for coil resistance
at L14 (9 ohm)
Repair or replace L14
coil.
Does the hopper lower?
See Hydraulic hopper lower
troubleshooting
section Part B
Yes
Yes
Yes
No
No
No
Press and hold hopper lower
button is the green light on the
A1 board S14
Note relay S12 will be on
momentary
Replace A1 control
board.
Does the hopper lower?
No
Yes
No
No
No
No