AL-KO ESC - Troubleshooting ESC Issues; Interpreting Red Status Lights; Addressing Connection Problems; Resolving Brake and Voltage Faults

ESC
User Manual
3
Troubleshooting
The ESC will indicate if there are any problems with the system by changing the LED status light to red for
minor problems or flashing red for a serious problem.
Red Status Light
Disconnect the ESC for 10 seconds and then reconnect.
If the red light remains on, then check for the following problems:
Loose contacts
Check that the ESC is connected properly and that the con-
nectors are not dirty or corroded.
Clean or replace the connector and terminals.
Check that the power cables to the ESC are in good condi-
tion and are not damaged.
Repair damaged cable or replace loom.
Check that the ESC module under the caravan has not
become dislodged.
Reattach the ESC firmly in the correct location.
Electric brakes are not all connected
Check that the ESC is connected to AL-KO electric brakes. Fit AL-KO electric brakes
Check that ALL the brakes are connected correctly. Reconnect or replace brakes as required.
Check that the brake magnets are not damaged. Repair or replace if necessary.
Under voltage/over voltage
Check that the tow vehicle is fitted with a 12 volt battery. Use only tow vehicles with 12 volt batteries.
Check that the power is supplied directly from the tow vehi-
cle battery and the connection to the battery is good.
Reconnect the power supply directly to the
battery.
The 12 pin connector may have poor connection or the
cables in the tow vehicle may be damaged or undersized.
Check with a voltmeter that 12 volts is reaching the 12 pin
connector at the rear of the tow vehicle.
Repair any damaged cables.
Clean the 12 pin connector.
Replace cables and/or connector if required.
The ESC connector may have poor connection or the cables
in the caravan may be damaged. Check with a voltmeter
that 12 volts is reaching the connector at the ESC under the
caravan. Measure the voltage
at the ESC connector, the
power supply contacts
are shown below.
Clean the connector.
Replace the connector if necessary.
Repair any damaged cables or replace cables
if necessary.
After completing each check, reconnect the ESC. When the LED status light turns green the ESC is fully
functional and the caravan is safe to tow.
Negative
Positive