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SECTION 16: TROUBLESHOOTING
65 of 73
16.2 Troubleshooting Flow Chart (Multiburner)
Refer to control panel
IOS manual for
troubleshooting.
Fan motor may have to
be replaced.
Remove obstruction.
No
Yes
Is there an obstruction to
the pump impeller?
No
No YesYesNo
No
Yes
NoNoYes
Yes
Yes
Yes
No
No
Yes
No
Yes
Yes
No
No
Check thermostat
and replace if
necessary.
Turn up thermostat.
Does the fan turn on?
Remove obstruction.
Repair, replace or
tighten hoses
as necessary.
Is the flue pipe or
the inlet of the
burner obstructed?
Are the hoses to the
pressure switch secure
and leak free?
Replace pressure switch.
Is the igniter gap
set at 3 mm?
Carefully reset gap
to 3 mm.
Replace automatic
control unit.
Unplug burner and check
electrode and ignition wire.
Are they damaged?
Replace electrode and
ignition wire as needed.
After 20 second pre-purge
Is there spark at the igniter?
Check clock program.
Reset as required.
Is there power (230
V)
to the control panel?
Is the clock set to on?
Is there power output
to the fan?
Disconnect power to the
motor. Does the
motor turn freely?
Motor may have have
tripped overload switch.
Wait 10 - 15 minutes for
automatic reset.
Is the motor connected
properly? Refer to the
wiring diagrams on the
motor and in the
installation manual.
Remove electrical plug
from the pressure switch;
place jumper between
black & white leads.
Does the fan turn on?