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1. Remove the cover from the control panel.
2. Isolate mains supply to panel.
3. Remove cable from terminals 2 and 3 and place over a fully-charged min 18V DC cordless tool battery. If unit opens, reverse polarity.

N.B. Please only use this in emergency as damage could occur to motor.

We get asked this question so much, we've made a video on it! Watch it on our YouTube Channel.

According to EN12101-2 standards, the top of the base of the roof AOV must be positioned at least 300mm above the finished roof surface. 

Yes, access from the roof is required for some maintenance tasks, such as replacing actuators. This ensures the process can be completed efficiently and safely. For most servicing, it is easier if the unit is opened first from the roof.

Maintenance for components like smoke vent systems is usually done inside, as part of the complete smoke vent system, which includes control panels and call points. Access to the components from the roof may be necessary for specific tasks.

Yes, if the actuator needs to be replaced, it can typically be done externally from the roof, making the process straightforward without needing to enter the building.