FAULT DIAGNOSIS
Once fully installed, the Isolator is switched ON by activating the internal ON/OFF switch/button. On activation,
the Isolator performs a system check before the battery connection function occurs. If any fault is detected then
the Isolator will remain in the OFF state and display an error code via the status LED in a sequence of RED flashes:
2 or 6 flashes - Maximum temperature exceeded.
The Battery Isolator will automatically switch OFF if maximum temperature is exceeded.
This may occur after very prolonged engine cranking or if the Battery Isolator is mounted close to a source of
heat e.g. engine, coolant pipes, exhaust, radiator fan, etc.
3 flashes - External Kill Button pressed or External Kill Button circuit broken.
If the External Kill Button has not been activated then check for loose or poor connection between the Battery
Isolator and the External Kill switch.
4 flashes - Maximum current in ENGINE STOP circuit exceeded.
The maximum current this Engine Stop signal can deliver is 10Amp continuous and 15Amp surge.
5 flashes - Low Battery Voltage.
The car battery voltage dropped below 8 Volts.
7 or 8 flashes -Maximum current in NEGATIVE circuit exceeded or short circuit detected.
Check for a short circuit from battery positive to chassis such as broken cables, faulty Alternator or Starter Motor.
9 flashes - Fault with installation or internal fault detected.
Check wiring for installation errors.
Once the fault is remedied the Battery Isolator can be reset by switching the internal switch/button OFF then
switching ON again. The unit will also be fully reset by disconnecting from the vehicle battery and reconnecting.
Note: When connecting to the car battery, the LED will flash BLUE 2 times to indicate a power-up reset has occurred. When
in the OFF/Standby state, this LED can also be seen to pulse BLUE, slowly. This is not an error code.
POSSIBLE ERRORS
1. Make sure there is only one cable attached to the negative terminal of the battery and that this cable
connects to the Battery Isolator and nowhere else. There must be no cable between the negative
terminal of the battery and chassis.
2. If the Battery Isolator does not switch ON when the internal button is pressed to the ON position then
observe any flashing LED error code and identify the fault from the list above. If the Battery Isolator
does not switch ON and does not display any error code then check the connections between battery
and Battery Isolator, make sure the battery is fully charged. Also check connections to the Internal
ON-OFF switch.
3. If the Battery Isolator is left in the ON state for a long period of time and the battery voltage drops
below 11 Volts and remains low for 90 minutes then the Battery Isolator will turn itself OFF to reduce
current draw and help protect the battery. Note, this will not occur when the engine is running or
when the car is being driven as long as the alternator maintains a battery voltage higher than 11 Volts.
4. Note that, when the Battery Isolator is in the OFF state the integrated LED will flash Blue very
slowly to indicate that it is connected to the battery and receiving power.
CARTEK AUTOMOTIVE ELECTRONICS LTD
Unit 25, Mitchell Point
Ensign Way, Hamble
Southampton, SO31 4RF
UNITED KINGDOM
Tel: +44 (0) 2380 457747
Web: www.CARTEKMOTORSPORT.com
