Flame Detection And Ignition - Profire Energy PF3100 Troubleshooting Manual

PF3100 TROUBLESHOOTING – SOLUTIONS TO COMMON PROBLEMS

4.1.4 Flame Detection and Ignition

1. Ion voltage tests
a. When the system is not running, at the board connectors measure the AC value of the main ion and
pilot ion to ground. They should cycle between 0 and a value greater than 25Vrms.
i. If the detection value is lower than 25Vrms check the flame detection gain settings in the UI.
The gain may be set too low and can be increased.
ii. Check that the rods are not grounded.
b. At the terminals measure the DC value of the main ion and pilot ion to ground. Without flame they
should be around 4.5VDC. With flame they will be lower.
i. If the DC value is low without flame there may be an issue with the board or the rods may be
grounded.
ii. If the DC value does not go low with flame there may be an open in the flame detection
wiring, a bad ignition coil or the rod could be incorrectly placed.
c. Measure both the DC and AC value of the coil high voltage output to ground (while the system is not
sparking or running). The AC value should be above 25Vrms and the DC value around 4.5VDC.
i. If there is no output from the coil it may not be wired correctly or it may be damaged.
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V1.1
Nov 29, 2016
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