FieldBench
York codes

York

Rapid amber

Protect

Flame sense < 1.5 µA

Weak rod current. Normal ~3.7 µA; lockout < 0.1 µA.

Walk Rapid amber in Diagnose

5 plates — walk the one on the cabinet

First check

1 Measure µA while it is running

Do not clean first and guess. Series-µA the rod on York TM8T during a call. Falling µA is oxide, ground, or a dying flame. A hard drop is often the pressure switch or limit opening, not the rod. Rod, ground, manifold.

Expect: Flame sense: Normal ~3.7 µA DC. Warning < 1.5 µA. Lockout < 0.1 µA.

The rest of the walkthrough is Diagnose.

On the plates

  • Read µA at the IFC flame-sense test pad during a run.
  • Clean the rod with a non-scratch pad — not sandpaper.
  • Chassis ground to burner box and IFC. Reversed polarity will also show as 9-red.
  • Manifold / orifice / LP conversion if the flame is lazy.
  • Clean rod, ground, manifold. Read µA at the test pad.
  • Rod, ground, manifold.

Plates that use Rapid amber