Nilfisk-Advance CS7000 - Page 423

Wheel System, Traction 423Service Manual – CS7000
Troubleshooting Chart
Flash
Code
#
Programmer LCD
Display/ Effect Of Fault
Possible Cause(s) Set/Clear Conditions
37 Motor Open
ShutdownMotor;
ShutdownMainContactor;
ShutdownEMBrake;
ShutdownThrottle;
FullBrake; ShutdownPump.
1. Motor phase is open.
2. Bad crimps or faulty wiring.
Set: Motor phase U, V, or W
detected open.
Clear: Cycle KSI.
38 K7 Wheel Drive
Contactor Welded
ShutdownMotor;
ShutdownMainContactor;
ShutdownEMBrake;
ShutdownThrottle;
FullBrake; ShutdownPump.
1. K7 Wheel Drive contactor tips
are welded closed.
2. Motor phase U or V is
disconnected or open.
3. An alternate voltage
path (such as an external
precharge resistor) is
providing a current to the
capacitor bank (B+ connection
terminal).
Set: Just prior to the K7 wheel
drive contactor closing, the
capacitor bank voltage (B+
connection terminal) was
loaded for a short time and the
voltage did not discharge.
Clear: Cycle KSI
39 Main Contactor Did Not
Close
ShutdownMotor;
ShutdownMainContactor;
ShutdownEMBrake;
ShutdownThrottle;
FullBrake; ShutdownPump.
1. Main contactor did not close.
2. Main contactor tips are
oxidized, burned, or not
making good contact.
3. External load on capacitor
bank (B+ connection terminal)
that prevents capacitor bank
from charging.
4. Blown B+ fuse.
Set: With the main contactor
commanded closed, the
capacitor bank voltage (B+
connection terminal) did not
charge to B+.
Clear: Cycle KSI.
41 Throttle Wiper High
ShutdownThrottle.
1. See Monitor menu » Inputs:
2. Throttle Pot. wiper voltage
too high.
Set: Throttle pot wiper (pin 16)
voltage is higher than the high
fault threshold (can be changed
with the VCL function Setup_
Pot_Faults).
Clear: Bring throttle pot
wiper voltage below the fault
threshold.
42 Throttle Wiper Low
ShutdownThrottle.
1. See Monitor menu » Inputs:
Throttle Pot.
2. Throttle pot wiper voltage too
low.
Set: Throttle pot wiper (pin 16)
voltage is lower than the low
fault threshold (can be changed
with the VCL function Setup_
Pot_Faults).
Clear: Bring throttle pot
wiper voltage above the fault
threshold.