
Thunder 7000 Troubleshooting Guide –4/1/20
Tarp system powers on but does not function when pressing either (Open) or
(Close), no flash codes arepresent.
1. Check for low voltage & looseconnections.
2. Test the remote functions of the tarp system to verify keypad buttonfailure.
3. Check for loose & corroded connections at the motor terminals and inspect the wires from the motor to
the inner control box located in the nose of the trailer.
4. Unplug the trailer power from the 2-pole receptacle, wait 15 seconds, re-plug power and verify operation.
5. If the LED status flashes green continuously and connections to the motor have been verified, this may
indicate the motor brushes are worn and the motor needs to be replaced.
Tarp system does not function and/or a red flashing light is present on the keypad
controller, indicating an error code. See error code explanations below: Codes will
flash, pause, and repeat until problem is corrected.
Two flashes indicates an Overcurrent Protection fault, this is normal operation so long as the tarp has
fully opened or fully closed. If not, check for obstructions in the operation of the tarp such as snow or ice
buildup. This also could indicate increased drag in the tarp motor or other excessive drag problems
causing premature tarp stoppage.
Three flashes indicates an Overheat Protection issue. This typically occurs if the system has been started
and stopped rapidly in a short period of time. Also, it can indicate increased drag in the tarp system
causing excess amperage. Re-check the tarp system after a cool downperiod.
Four flashes indicates an Over Voltage Protection issue. Using a voltmeter, check the tractor
batteries & alternator for voltage exceeding 15.5 volts.
Five flashes indicates an Under Voltage Protection issue. Using a voltmeter, check the system for low
voltage. Also check all connection points for looseness and corrosion including battery terminals,
circuit breaker, power cord, and receptacle plug. Connect an alternate power source toverify.
Seven flashes indicates a Driver Error fault indicating there is not enough amperage or voltage from the
power source to run the drive motor OR the drive motor, motor wires may be shorted to ground.
(1) Connect an alternate power source to verify a low amperage/voltage problem. Source must be a
lead-acid type high amperage battery source, not from a charger. Multiple 12v batteries wired in
parallel are recommended for proper operation.
(2) Make sure the battery is fully charged and the charging system on the truck or power supply is
running and working properly.
(3) Check connections at the motor for looseness or corrosion.
(4) Check motor wires for cuts, abrasions or bare spots that may touch ground.
f) Eight flashes indicates com failure from the inner control box to the keypad controller. Check cable
between keypad controller and control box for damage.