Dettson Chinook C105-M-V, Installation Instructions And Homeowner'S Manual

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12.9.2 Causes
1. The most common cause is that the flame sense
rod may need cleaning or may not be properly con-
nected or wiring between the rod and the furnace
control may be shorted or opened.
2. Improperly mounted or poorly grounded flame sen-
sor
3. Flame pattern may be unsafe
12.9.3 Solutions
1. Clean the flame sense rod and check all connec-
tions and wire between the rod and the furnace
control.
2. Reinstall and check wiring and connections. Also
make sure the furnace is properly grounded.
3. Check that all burner assembly components are
properly installed. Check for good seals between
the burner and blower compartments. Insure that
the combustion door gasket is in place and the door
is properly installed and sealed
12.10 14 - Unexpected flame
12.10.1 Description
This fault indicates flame is present when it should not
be. Flame is seen to be present when the gas valve is
supposed to be off.
12.10.2 Causes
1. Field miswiring of 24VAC to the gas valve main
solenoid.
2. Faulty gas valve stuck in the “OPEN” position.
3. Faulty furnace control (signal improperly sensed
when it should not be sensed at all).
12.10.3 Solutions
1. Wire properly.
2. Replace gas valve.
3. Replace furnace control.
12.11 16 - Igniter Fail
12.11.1 Description
This code is displayed anytime there is an igniter failure.
It may also be displayed if the furnace control relay for
the igniter is not closing or cannot be sensed indicating
a faulty control board. The fault may also be displayed if
there is improper grounding of the control board.
12.11.2 Causes
The control cannot sense the igniter. The control may
be faulty or there may be a large potential difference be-
tween ground and neutral to the furnace control.
12.11.3 Solutions
Check the igniter and the connections between the igniter
and the control board. If these are OK, check ground po-
tential between neutral and ground. There should be no
more than 5 volts difference. If this is OK, check the fur-
nace control. Replace if necessary.
12.12 22 - Main high limit open
12.12.1 Description
The main high limit has opened or is sensed to be
opened. This normally means that the temperature in-
side the heat exchanger area has gone above a certain
predetermined critical value and heating operation is not
permitted until the limit cools to within normal parame-
ters.
12.12.2 Causes
1. Insufficient airflow.
2. Restriction in the supply duct; causing erratic air
flow partern.
3. Loose or faulty wiring.
4. Input too high.
12.12.3 Solutions
1. Check for proper blower operation. Is the blower
turning during heat (or any other) mode? Check
the wiring to the motor then check the motor.
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