Accu-Steam G2 Service Manual - Ignition System Testing
Accu-Steam™ G2 Gas Service Manual
PAGE 22
SP8042-1609
Ignition System Testing
When trouble shooting ignition problems it is absolutely imperative to start off by
taking incoming/outgoing gas pressure and to get a reading from the flame sensor. These
three measurement are the most useful readings a technician can take when diagnosing
AccuTemp gas equipment and are often the most neglected.
Flame Sense
The ACCU-STEAM G2 gas griddle has a flame sensing circuit to determine if the system has proper
combustion. When the system is turned on gas is sent to the burner and an electronic ignition tries to ignite
the griddle. The griddle then checks to see if flame is established in the burner. If the flame sense feedback is
within the proper range the system will stay on until the digital temperature controller is satisfied. The griddles’
ignition module continues to monitor the voltage and as long as its within the proper range the griddle will stay
on. If the flame sense reading falls below the threshold (
13mV or .32uA
) the griddle will go into lock out and
will stop heating. When a lock out occurs, the fault indicator light should illuminate.
Micro-amp flame sense reading