Quartz emitters have a very low resistance when cold and briefly draw a multiple of their operating current when switched on. The channel’s current monitoring interprets this inrush current as a fault and switches off before the emitter is warm enough to reach its operating resistance.

This is therefore not a defect but monitoring designed for ordinary heater cartridges. For quartz emitters and similar loads with a high inrush current, the current limits and the delay before the fault is triggered can be adjusted. These values are in the Service user level; please coordinate the change with customer service – it applies to the whole device and lowers monitoring that normally protects it.