Question 1

Error Red Light Flashing on ECB: The unit won't operate at all - completely dead - with the ECB's red light flashing

Accepted Answer

Possible cause: Over heating. Take out the isolation key and wait 20 minutes to give the thermal fuse a chance to reset - the red light should stop flashing and the ECB shouldn't feel warm to the touch.

Question 2

Error Green light flashing on ECB: The unit won't operate, or only moves on and off, with the ECB's green light flashing

Accepted Answer

Possible cause: Caravan battery low. Check the caravan battery's voltage with nothing switched on, at least 4 hours after it was last charged: about 12.7V or more is fully charged, 12.4V is roughly half, and 12.0V or less is flat. Charge or replace the battery as needed.

Question 3

Unit fails to operate

Accepted Answer

Reset the ECB: switch off the isolation switch, pull the key out for at least 20 seconds, then switch back on. The ECB's green light should then be lit.

Question 4

The unit's completely dead and won't operate at all

Accepted Answer

Confirm the green light is lit on the electronics. If it isn't, check the in-line fuse hasn't blown and that 12V DC is actually reaching the ECB.

Question 5

The unit won't operate, or operates on and off

Accepted Answer

Confirm the handset battery is reading the correct 9.5V - if both rows of red LEDs flash, the handset battery is getting low.

Question 6

The unit won't operate properly, or moves in a stop-start way

Accepted Answer

Possible cause: The battery terminals are poorly connected or corroded. Make sure the battery terminals are clean and properly connected.

Question 7

The caravan won't move, or only moves on and off

Accepted Answer

Possible cause: Caravan battery low. Engage the rollers, move the caravan, and watch how far the caravan's battery meter drops. If it falls below 12V, have an accredited supplier test the battery, then charge or replace it as needed.

Question 8

Rollers slip on wheels

Accepted Answer

Disengage the rollers from the tyres - the gap should be roughly 20mm. Also check the tyre treads aren't badly worn and that tyre pressures are correct.

Question 9

Error PCB Over Heat: PCB Over Heat

Accepted Answer

Take the isolation key out and wait 20 minutes to give the thermal fuse a chance to reset.

Question 10

Error Low Caravan Battery Voltage: Low Caravan Battery Voltage

Accepted Answer

Check voltage of battery, then charge or renew caravan battery.

Error Code / Indicator	Symptom / Meaning	Possible Cause	Step-by-Step DIY Fix	Suggested Actions
`Red Light Flashing on ECB`	The unit won't operate at all - completely dead - with the ECB's red light flashing	Over heating	Take out the isolation key and wait 20 minutes to give the thermal fuse a chance to reset - the red light should stop flashing and the ECB shouldn't feel warm to the touch.	DIY Safe
`Green light flashing on ECB`	The unit won't operate, or only moves on and off, with the ECB's green light flashing	Caravan battery low	Check the caravan battery's voltage with nothing switched on, at least 4 hours after it was last charged: about 12.7V or more is fully charged, 12.4V is roughly half, and 12.0V or less is flat. Charge or replace the battery as needed.	DIY Safe
`N/A`	Unit fails to operate	—	Reset the ECB: switch off the isolation switch, pull the key out for at least 20 seconds, then switch back on. The ECB's green light should then be lit.	DIY Safe
`N/A`	The unit's completely dead and won't operate at all	—	Confirm the green light is lit on the electronics. If it isn't, check the in-line fuse hasn't blown and that 12V DC is actually reaching the ECB.	DIY Safe
`N/A`	The unit won't operate, or operates on and off	—	Confirm the handset battery is reading the correct 9.5V - if both rows of red LEDs flash, the handset battery is getting low.	DIY Safe
`N/A`	The unit won't operate properly, or moves in a stop-start way	The battery terminals are poorly connected or corroded	Make sure the battery terminals are clean and properly connected.	DIY Safe
`N/A`	The caravan won't move, or only moves on and off	Caravan battery low	Engage the rollers, move the caravan, and watch how far the caravan's battery meter drops. If it falls below 12V, have an accredited supplier test the battery, then charge or replace it as needed.	DIY Check / Tech Fallback
`N/A`	Rollers slip on wheels	—	Disengage the rollers from the tyres - the gap should be roughly 20mm. Also check the tyre treads aren't badly worn and that tyre pressures are correct.	DIY Safe
`PCB Over Heat`	PCB Over Heat	—	Take the isolation key out and wait 20 minutes to give the thermal fuse a chance to reset.	DIY Safe
`Low Caravan Battery Voltage`	Low Caravan Battery Voltage	—	Check voltage of battery, then charge or renew caravan battery.	DIY Safe
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Master Troubleshooting & Diagnostics Matrix