Blodgett 40GS-KLS Series - Manual (Page 21)

OM-40GS-KLS 19
SYMPTOM WHO
WHAT TO CHECK
X indicates items which must be performed by an authorized technician.
Spark is present but the
pilot will not light. Auth Service
Rep Only
a. That the pilot valve is securely connected to terminals. X
b. For 24 VAC at terminals PV and PV/MV. If 24V is not present, replace
the ignition control module. X
b. That gas pressure is at least 3.5” W.C.(8.7818 􀀁b).􀀁
c. For gas at the pilot. If it is not flowing:
(1) Check the pilot gas line for kinks and obstructions. X
(2) Clean orifice, if necessary. X
(3) Check magnetic operator for pilot valve on gas valve. Repair or
replace as necessary. X
d. That the pilot spark gap is located in the pilot gas stream. If not,
adjust or replace the pilot burner. X
e. For drafts. Shield the pilot burner, if necessary. X
Pilot lights, but main
burner will not come on
and spark does not stay
on. Auth Service
Rep Only
a. For 24 V between terminals MV and PV/MV while pilot is burning. If
24V is not present, replace the ignition control module. X
b. That gas pressure is at least 3.5” W.C.(8.7818 b). X
c. Electrical connections of the main valve to terminals, to assure that
they are securely attached. Check magnetic operator for main valve on
gas valve. Repair or replace as necessary. X
Pilot lights, but main
burner will not come on,
the spark stays on. Auth Service
Rep Only
a. Check for bad burner ground. If necessary, repair with high
temperature wire. X
b. Pilot burner ceramic insulator for cracks. X
c. That cable is not grounded out. If it is, correct the ground-out
condition or replace cable. X
d. For proper gas pressure. X
e. Clean pilot assembly, or replace if necessary. X
f. Tighten all mechanical and electrical connections. X
g. If the pilot flame is weak, increase pilot orifice size. X
h. Replace ignition control module. X
Main burner comes on but
will not stay on. Auth Service
Rep Only
a. Check burner ground for bad wire or connection. Replace if necessary
with high temperature wire. X
b. Check for low gas supply pressure. If necessary, replace ignition
control module. X
Pressure relief valve
leaks a small amount of
steam when the kettle is
operating. User a. For contamination that prevents seating of valve. With full pressure in
the jacket, pull the lever all the way briefly to blow the valve clean, then
let the lever snap back to seat the valve.
Auth Service
Rep Only
b. Pressure relief valve for defects. Replace any defective valve with an
identical valve.
Troubleshooting