A_GC_SM_HDGASCOUNTERSERV_GT-UT-SERIES (Rev 1) Page 29
Troubleshooting — Griddles
WARNING
Inspection, testing and repair of equipment should be performed only by qualified service personnel. Certain
procedures in this section require gas tests or measurements while gas is applied to the unit. Use extreme caution
at all times. If test points are not easily accessible, disconnect main gas line, attach test equipment and reapply gas
supply to continue the test.
Always confirm manifold gas pressure at all times.
PROBLEM POSSIBLE CAUSE SOLUTION
Burner Flame soft –lazy tip yellow Not enough air mixing with gas Open air shutter
Flames lift off burners
Too much air mixing with gas Reduce air shutter openingFlashes back in burner
“Pop’s” excessively when turned off
Griddle too hot or too cold
Thermostat out of Calibration
(Thermostat Griddle)
Check Calibration temperature
with actual readings. See
calibration procedure.
Hi/lo valve set wrong
(Hi/Lo Valve Griddle)
Adjust hi/lo valve. Adjust on
low setting only, burner cold.
Lowest stable flame
Delayed ignition
Unit over-gassed fired Adjust manifold pressure
Incorrect injector Check injector size
Burner ports plugged Clean burner ports
Pilot burner will not ignite
Pilot flame too small Adjust pilot valve on manifold
Draft in Kitchen Determine cause
Flame lifts off pilot Pilot over-gassed fired Adjust pilot valve
Pilot Outage (SIT Control Models) Bad thermocouple
Check actual mV open and
closed circuits. See table
below.
SIT Thermocouple
mV
Closed Circuit 8-14
Open Circuit 18-28
Drop Out 2
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