Nilfisk-Advance 7765 Service Manual page 128

Service Manual – Advance 7765 / Nilfisk CR1500
Troubleshooting
General Troubleshooting
Problem
Side Broom motor
not running.
Specifications
Component
Side Broom Solenoid (5)
Valve
Side Broom Motor
Cause
Circuit breaker CB6 is
tripped.
No voltage to the Side
Broom Solenoid (5).
Side Broom Solenoid (5) is
not operating.
Specifications
Nominal Coil Resistance – 10.1 ohms
Displacement – 1.93 CIR
Correction
Reset the circuit breaker.
• Check for continuity through the hopper and
hopper door "whisker" switches when the hopper
is down and the hopper door is closed. Repair the
wiring or replace the switch(es) as necessary.
• Check the Side Broom Switch function and repair/
replace as necessary.
• Check the wiring from the Side Broom Switch to
the Side Broom Solenoid (5). There should be 0
volts to the solenoid when the Side Broom Switch
is off, and 12 VDC to the solenoid when the Side
Broom Switch is on.
1. Check the coil resistance of the Side Broom
Solenoid (5). If not 10.1 ohms ±10%, replace the
coil.
2. If the coil resistance is within spec, check for
binding or a mechanical problem. Repair or
replace the valve as necessary.
Sweep System, Side Broom 233