Nilfisk-Advance Advance SC5000 Service Manual

41Service Manual – SC5000 04 - Control System
Main Controller (A1) Error Codes
1-001 K1 KSI Relay Coil Open
Description
(K1 KSI Relay Open) The controller has detected that the KSI relay is not responding
to a closure command.
Setting
Conditions
The controller has commanded the KSI relay to close, but 36
volts is not detected at the output contacts. (Note, because
KSI is not active, this may result in multiple modules to fail to
boot, causing unrelated errors to appear.)
When Monitored
Always
Possible Causes
• Circuit breaker CB1 is open.
• Loose wire at the KSI relay
• Faulty relay
Initial Action Press the CB1 circuit breaker reset button.
Troubleshooting Steps
1. Remove the control board from its mounting, but leave all
connections intact.
2. Check the voltage between KSI contact 2 and the main ground
lug in the electrical bay.
− If 36 volts is not present, trace the fault back through CB1 and
back to the main battery.
− If 36 volts is present, continue.
3. Power the machine, and as necessary, use the service menu to
ensure the KSI relay is commanded to be energized.
4. Check the voltage between KSI contact 4 and the main ground
lug.
− If 36 volts is present, repair the gray wire between the KSI relay and the main controller.
− If 36 volts is not present, continue.
5. Check the voltage between contact 0 and contact 1 of the KSI relay coil.
− If the voltage is at or near 36 volts, replace the KSI relay.
− If the voltage is not near 36 volts, continue.
6. Check the voltage between contact 1 (yellow/brown wire) and the battery ground lug in the electrical
bay.
− If the voltage is not near 36 volts, repair or replace the harness between the relay and the 5-amp
circuit breaker CB1.
7. Check the voltage between contact J1-3 and J1-2 at the main control board connector.
− If the voltage is not near 36 volts, replace the main control board.
− If the voltage is at or near 36 volts, repair or replace the wiring harness between the control board
and the KSI relay.
0
1
Org/Brn
Yel/Brn
4
2
Org
Gry

Nilfisk-Advance Advance SC5000 Specifications

General

Brand	Nilfisk-Advance
Model	Advance SC5000
Category	Scrubber
Language	English