SYMPTOM POSSIBLE CAUSE
A. No gas ow. 1. Valve improperly installed.
B. Continuous low re (electronics ok). 2. Open circuit in modulator coil.
3. Plunger missing, jammed or improperly installed.
4. Ruptured main or balancing diaphragm.
C. Continuous Low Fire (electronics problem) 5. No voltage to the ampli er.
6. Short in modulator coil circuit.
7. Short in TS144 circuit.
8. Faulty ampli er.
D. Incorrect Low Fire 9. Incorrect by-pass metering valve adjustment.
10. Excessive negative burner pressure.
E. Continuous Minimum Discharge Air Temperature 11. Faulty ampli er.
12. Short in T244 or TS244/TD244 circuit
13. Incorrect space temperature calibration.
F. Incorrect Max. or Min. Discharge Air Temperature. 14. Improper TS144 location.
15. Incorrect discharge air temperature calibrations
G. Continuous High Fire (electronics ok) 16. Foreign material holding valve open.
17. Plunger jammed.
H. Continuous High Fire. (electronics problem) 18. Open circuit in TS144
I. Incorrect High Fire 19. Inlet pressure too low.
20. Incorrect outlet pressure adjustment.
J. Continuous Maximum Discharge Air Temperature 21. Faulty ampli er.
22. Open circuit in T244 to TS244/TD244
23. Incorrect space temperature calibration.
K. Burned out Transformer. No Voltage to Ampli er 24. Short in modulator coil circuit.
L. Incorrect Space Temperature. 25. Incorrect maximum discharge air temperature
setting (A1044).
26. Incorrect minimum discharge air temperature
setting (A1044).
27. Insufficient burner capacity.
28. Incorrect space temperature calibration.
*Control circuits external to the Series 44 can cause burner malfunction. Always check manual valve to be certain gas is on, and check limit controls
for normal operation.
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