Chapter 2 Profire V Burner
2-38 750-177
PROBLEM SOLUTION
Modulating Motor Does Not
Operate
1. Manual-automatic switch in wrong position.
2. Linkage loose or jammed.
3. Motor does not drive to open or close during pre-purge or close on burner shut-
down.
a. Motor defective.
b. Loose electrical connection.
c. Damper motor transformer defective.
4. Motor does not operate on demand.
a. Manual-automatic switch in wrong position.
b. Modulating control improperly set or inoperative.
c. Motor defective.
d. Loose electrical connection.
e. Damper motor transformer defective.
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