What to do if the LED flashes quickly on my Vaillant Control Unit?
If the LED on your Vaillant Control Unit is flashing quickly, it could indicate a short circuit in the connected temperature sensor (NTC) located in the DHW cylinder. First, check the cable of the temperature sensor for any signs of damage. If the cable is fine, you may need to replace the temperature sensor in the DHW cylinder.
How to fix a Vaillant Control Unit with LED permanently off?
If the LED on your Vaillant Control Unit is permanently off, it indicates that there is no 230 V supply available or the fuse in the appliance is defective. Check if the mains voltage cable is correctly connected. Also, check the mains fuse for the 230 V supply and reconnect the mains supply if necessary. You may also need to replace the mains fuse in the VR 65 (4 A slow).
What does it mean if the LED on my Vaillant Control Unit flashes slowly?
If the LED on your Vaillant Control Unit is flashing slowly, this indicates a communication error in the eBUS protocol to the boiler. Inform the Vaillant customer service.
Why is the LED permanently on on my Vaillant Control Unit?
Normal operation.
General| Model | VR 65 |
|---|---|
| Brand | Vaillant |
| Compatibility | Vaillant heating systems |
| Display | LCD |
| Mounting | Wall-mounted |
| Application | Residential heating control |
| Functions | Scheduling |
| Installation | Professional installation |
| Type | Central control unit |
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