•Check that “NONE” of the thermal and magnetic overloads have “TRIPPED.”
•Check circuitry;
•Retest
7b) To verify burner fan motor contactor (MS8) operation:
Apply a 110 VAC voltage to MS8’s terminals A1 and A2 and verify that the contactor activates.
•If MS8 cycles this will indicate that its OK. Verify wiring to the device using the
•If MS8 “DOES NOT” cycle;
•Check device and replace if necessary
•Retest
8b) Flame Detector & Burner Chassis Ground
To test the flame detector signal refer to Section VI, Part D, Gas Burner and Ignition Systemon page 37 thru page 45.
•If the flame detector test fails:
•Verify that the flame detector and burner chassis connections, located on the left side if the burner, are sound and tight.
•Check wiring (See
•Retest
9b) To test the burner controller module itself;
Refer to Section VI, Part D, Gas Burner and Ignition System on page 37 thru page 45 for wiring information, concerning the Burner Controller Module (BCM), refer to the
5.“AIR FAULT” Message
PLC (Programmable Logic Controller) MESSAGE “AIR FAULT”
a)PROBABLE CAUSES;
1a) Incorrect Fan (Blower) Rotation.
2a) Lint Chamber Air Pressure Switch.
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