Sunfire SF-150, Service Manual

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Symptom Possible Cause Corrective Action
2. Attempts to fire but does not
establish a flame - cont'd Transformer/electrodes not
sparking Test transformer/look for shorts
& clean or replace
electrodes/transformer.
Combustion blower not properly
adjusted or defective See flame adjustment on page 3-
4 regarding air band adjustment
CAD cell is dirty Clean CAD cell with cloth. If issue
still pursists see below.
CAD Cell is misaligned Test CAD cell by slightly adjusting
position a few times. If issue
pursists, see below.
CAD cell is defective Test by using a jump wire from
terminal F1 to terminal F2 on the
primary control with the
following process. Step 1: Hook
jumper to F1. Step 2: Start unit
and wait until flame is present.
Step 3: Then immediately hook
jump wire to F2. If unit continues
to run after 1 minute, CAD cell is
defective and needs to be
repalced.
WARNING: THIS IS
FOR TESTING PURPOSES ONLY.
FOR SAFETY, DO NOT
CONTINTUE TO OPERATE USING
JUMP WIRES.
Burner settings may need
adjustment. Test burner. Remove burner
housing panel to access the
burner. Start the SunFire and
view the LED lights to the right of
the burner primary control. If
green light continues to blink, an
adjustment may be needed.
Adjust the top fuel pressure
screw along with very slight
adjustements to the air band
until a correct adjustment is
achieved and the green light
stays solid green.
3. Fires and then fails
Only if fails contintually within
30 seconds
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