Allmand Maxi-Heat Series, Operator And Parts Manual

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13
TROUBLESHOOTING
PROBLEM POSSIBLE CAUSE SOLUTION
Check and clean sensor Replace if problem reoccurs
Check yellow wires between
the sensor and relay
Replace sensor if problem reoccurs
Check fan switch Replace if problem reoccurs
Burner starts up then
locks out at the relay
Check motor to see if power is
getting to the motor
Replace motor if problem reoccurs
Check air flow to insure both
ducts are in place and clear
Clear obstructions
Check pump pressure; unit
could be over-firing
Adjust pressure if required
Check to insure that proper
nozzle is installed Check manufacturer’s nozzle
specifications
Main fan will not
come on, unit shuts
down on high limit
Check high limit switch. Change high limit switch
Accumulation of oil
in the combustion
chamber
The unit has been reset a
number of times without ignition
Tilt the unit up at the burner end to let
the excess oil drain out of the
secondary chamber. Allow unit to
drain for 15-20 minutes or until all oil
has drained out. Open electrical box
and jumper fan switch so that the
burner and fan start together. There
will be smoky fire a few minutes until
the excess oil that has sprayed on the
walls of the combustion chamber has
burned off. When unit has stabilized
and the burner is set up to operate
properly, shut off the switch. Let the
fan cool down the chamber and stop.
Remove the jumper across the fan
switch and close the electrical panel.
The unit should operate normally. If
not, refer to the
DELAYED IGNITION
section of the troubleshooting guide.
Not
for
Reproduction