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FIGURE 8
EL280DF Ignitor Check Out
Test 2 Checking the resistance of the ignitor
Seperate the 2-pin jack plug near the manifold and
check resistance of the ignitor. Reading should be
betwenn 39 and 70 ohms. If reading is correct, then
there is a problem with the wiring between the jack
plug anf the control. If reading is not correct, the issue
is the ignitor.
Test 3 Checking voltage to ignitor
Insert meter probes into terminals 1 and 5.
(use small diameter probes in order to not
damage plug). Check voltage during 20
second ignitor warm up period. Voltage
should read 120 volts + or - 10%. If voltage
is above or below these values, check for
correct supply voltage to furnace.
Test 1 Checking resistance of ignitor circuit
Remove 5-pin plug from integrated control.
Check Ohms reading across terminal 1 and 5.
Reading should be between 39 and 70 ohms. If
value is correct, this is the only test needed. If
the meter reading is not correct (”0” or ifinity),
then a second test is needed.
Integrated Control Board
Detail
Test 3
Test 2
Multi
−
Meter
(set to ohms)
Integrated Control Board
Detail
Test 1
Multi
−
Meter
(set to ohms)
Integrated Control Board
Detail
Multi
−
Meter
(set to AC volts)
