Heaters

Smiths Heaters Fault Finding Chart - "Ventilating" Selector (Guards & Local Panels)

Follow the instructions below to trace a fault when running through control heaters in 'ventilator' mode (blowing unheated air).

Switch to vent.
Switch Isolator to on.

What happens?

- No isolator light on local or guards panel
- No isolator light on guards panel
- No isolator light on local panel
- Isolator light on