Sterling Plumbing SDRIOM-2 - Manual (Page 9)

9
SECTION VII – TROUBLESHOOTING
Symptom Cause Remedy
C. continued
D. Burner will not respond to tem-
perature.
9. Defective gas valve or actuator.
10. Defective spark rod or out of
position. (see spark rod diagram
#P-001004)
11. Flame rod not sensing flame. (see
spark rod diagram #P-001003)
12. Defective regulator.
13. Blocked vent lines or vent
limiters.
14. Low fire set too low or too high.
1. For Maxitrol system.
2. For Honeywell system.
9. Check power to gas valves. If gas
pressure matches unit rating plate
and valve does not open, replace
gas valve or actuator.
10. Make sure spark rod is producing
a sufficient spark to light off
burner, make sure porcelain is
not cracked. Check wiring or
replace if necessary.
11. Make sure flame rod is in flame.
Make sure porcelain is not
cracked. Check wiring or replace
if necessary.
12. Clean or replace regulator.
13. Check vent lines or replace vent
limiters.
14. Adjust setting on modulating valve
or gas valve.
1. See following troubleshooting
guide for Maxitrol series 14 & 44.
2. See following troubleshooting
guide for Honeywell series.
System without Pilot continued