Nilfisk-Advance CS7000 Fuel Cell EcoFlex, Service Manual

Page: 295 / 440

Recovery System 295 Service Manual – CS7000
Troubleshooting
Note: You can use the Service Mode to toggle the various system components on and off to check for
function. Refer to the Control System/Service Mode section for information on how to enter
and use the Service Mode.
Problem Cause Correction
Neither of the vacuum
motors will run.
An interlock is not
closed.
Before you start troubleshooting the recovery system, check to
make sure:
• The emergency stop switch (
S15
) on the Operator control
panel is disengaged (rotate clockwise).
• The safety relay from the steering system (
K14
) is closed.
• The seat switch (
S9
) is closed.
• The battery interlock proximity sensor (
S13
) is closed.
• The A1 Main Machine Controller is receiving the
appropriate signal from the A3 Control Panel via the CAN
BUS.
The 150-amp Fuse
(
F2
) is blown.
Check the Fuse (
F2
) and replace if necessary.
There is no voltage to
the
K5
contactor coil.
Check circuit breaker
CB1
reset if necessary.
The contactor
K9
is not providing positive voltage to the
K5
contactor coil.
1. Check the
K9
contactor coil resistance. If the coil
resistance is not 118 ohms ± 10%, replace the contactor.
2. Check the continuity through contactor
K9
with the coil
energized. If the contacts are open, replace the contactor.
3. Check the
J2-14
output from A1 Main Machine Controller.
There is no voltage to
the vacuum motors.
1. Check the
K5
contactor coil resistance. If the coil
resistance is not 118 ohms ± 10%, replace the contactor.
2. Check the continuity through contactor
K5
with the coil
energized. If the contacts are open, replace the contactor.
There is an open
circuit in the vacuum
motor wiring.
Check the vacuum motor wiring and connections from
contactor
K5
to the motors, and the ground connections from
the motors to battery ground. Repair as necessary.
The vacuum current
sensor (
B3
) is not
operating correctly
(generating a fault).
Check the wiring and connections from the A1 Main Machine
Controller to the vacuum current sensor and repair as
necessary.
Check the +5V output from
J7-24
and the ground output from
J7-25
to the vacuum current sensor (
B3
) from the A1 Main
Machine Controller.
Check the input to
J7-29
on the A1 Main Machine Controller
from the vacuum current sensor. If the output is not between
2.5 and 4.7 volts, replace the vacuum current sensor.