TQ 24Vdc Combustion Fan (modulating heaters) - testing operation
⚠️ Safety Notice – Gas Heating Products
This appliance must only be installed, commissioned, serviced and repaired by suitably qualified and licensed personnel.
Before commencing work, complete a task-specific risk assessment and ensure gas and electrical safety requirements, ventilation provisions, safe access, adequate service clearances and appropriate PPE have been considered. All work must comply with applicable regulations, standards and manufacturer requirements.
Particular care must be taken when working around gas systems, electrical components, combustion products, hot surfaces, moving parts, roof spaces, ceiling spaces and confined spaces.
Do not proceed if safe access, required clearances, ventilation requirements, confined space risks or appropriate safety controls cannot be achieved and maintained.
Safety takes priority over diagnosis, repairs, installation schedules and customer expectations. If the task cannot be completed safely, it must not proceed until the risks have been adequately controlled.
- Check 24VDC supply to combustion fan (pins 1 and 5 at 5-way connector) using a suitable multimeter
- Check >10VDC supply to combustion fan (pins 4 and 5 at 5-way connector) using a suitable multimeter approximately 10-20 seconds after call for heat is received by ICS.
- Check 24VDC supply at ICS (pins 1 and 4 - blue and brown wires) at 10-way connector ICS) using suitable multimeter
- Check >10VDC supply at ICS (pins 1 and 3 blue and white wires) at 10-way connector ICS) using a suitable multimeter approximately 10-20 seconds after call for heat is received by ICS
