Fireye NX6100 F16: primary air pressure not proven, what to check?
My NX6100 controller is throwing an F16 fault during burner startup, specifically at status 07. This is for the primary air, not the main combustion air. What should I check first?
The Fireye NX6100 controller's F16 fault indicates that the optional primary air pressure switch did not register air pressure when required, typically from status 07 onwards. This fault is distinct from F14, which relates to the main combustion air switch, and F17, which signals primary air pressure when it shouldn't be present. The NX6100 is a microprocessor-based flame safeguard and parallel positioning combustion controller.
Likely causes and checks
1Primary air fan or path issue
- Points to it
- The primary air fan might not be running or its air path could be restricted, preventing air from reaching the switch.
- Check
- Confirm that the primary air source is operating and its air path is clear of obstructions.
2Primary air switch setpoint or sensing line problem
- Points to it
- Air may be present, but the primary air switch is not making contact, possibly due to an incorrect setpoint or an issue with its sensing line.
- Check
- Measure the differential pressure at the primary air switch and compare it against its specified setpoint.
Next check: After checking the primary air fan/path and the switch setpoint/sensing line, ensure that option 6.x is set correctly, as incorrect settings can also lead to air pressure faults.
Related questions
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