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DISPLAY ATC DIAGNOSIS WHAT TO DO OUTCOME STATUS
COLOUR CONDITION
Green ATC Active Everything Ok
Green Flashing ATC Active Self test incomplete
Red ATC Inactive Possible to
continue journey
Red flashing ATC has detected Do not continue
a fault with ATC
connected
LED not working ATC has no power Check push rod
position as shown
LED faulty on page 5 before
continuing journey.
Drive forward to
detect movement to
complete self test
and re check LED.
Remove 12S or 13
Pin plug and wait
5 seconds.
Reconnect plug.
Remove 12S or 13
Pin plug and wait
5 seconds.
Reconnect the plug.
Remove 12S or 13
Pin plug and wait 5
seconds. Reconnect
the plug.
Check for constant
live - refer to system
requirements.
Green (Constant) Ready for journey
Green Ready for journey
Red ATC Error logfile memory
exceeded. Caravan can be
towed, but ATC will not apply
caravan brakes in the event of
instability. See below *
Green Ready for journey
Red (flashing) ATC faulty, and cannot be
driven. Remove push-rod as
shown on page 5. Consult
AL-KO, see back page for
details.
Green Ready for journey
LED not working If power ok, check push rod
position: Red line visible - do
not drive vehicle. Red line not
visible - possible to continue
journey but consult AL-KO see
back page for details.
SYSTEM REQUIREMENTS
ATC draws power from the towing vehicle towbar and
requires connection to either:
Twin 7-Pin Connection - ATC can be connected via the
auxiliary 12S (white/grey) plug and requires power
on requires power on Pins 4 (permanent supply) and
3 (earth). Please ensure that your vehicle towbar is
correctly connected to ensure correct ATC operation.
This can be checked with the use of a multimeter.
Important - A 20 amp fuse is required for the constant
12V supply to Pin 4 on the 12S socket. If only a single
fuse is fitted to supply both Pins 4 and Pin 6, the power
supply capability of the installation must be checked
and a minimum fuse rating of 25 Amps must be used.
13 Pin Connection - ATC can be connected via the 13-Pin
plug and requires power on Pins 9 (permanent supply)
and 13 (earth). Please ensure that your vehicle towbar
is correctly connected to ensure correct ATC operation.
This can be checked with the use of a multimeter.
OPERATING INSTRUCTIONS
After coupling the caravan correctly to the towing
vehicle, connect the 12N & 12S plugs or the 13 Pin plug
to the towbar.
Upon connection, ATC will carry out an initial self test
and the LED light on the front fairing will light up RED.
During the self test, the sound of the push rod moving
inside ATC can be heard. When the self test is complete,
the LED will turn GREEN or flashing GREEN to signal that
ATC is active.
If the LED does not change to green, then ATC is not
functioning correctly. The table provided on page 4
details what to do in this case.
Prior to commencing any journey, ensure that the
caravan lighting is fully operational and check the
vehicle is loaded appropriately, the nose weight and
tyre pressures are correct, and confirm that the caravan
is coupled to the vehicle with the breakaway cable
correctly applied.
Always re-check the ATC LED is green after any interval
during a journey, such as a service station break.
ATC LED on fairing
LED OPERATION
3 4
* ATC stores operating errors in a logfile which over time will become full and will result in the solid red light appearing. This needs to be
erased and can be done easily by connecting the caravan to a 12 volt supply for a period of 12 hours. The power required to carry out this
function is minimal. Most occurrences of these errors are due to power supply problems to ATC which could be due to low voltage, or an
intermittent power supply from the towbar.
3


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