5.21 FLAME SENSOR MODULE
The Flame Sensor consists of a sealed module with a photodiode aimed at the flame, a red LED
indicator light and 3 wires, white (+), black (-), and green (signal) connected to the main board. Under
normal operating conditions whenever the burner ignition begins, the red LED will flash once
indicating the white and black wires are connected and the module is receiving
power and working properly. Once the burner is ignited, the LED will begin to
flicker like the flame. If for any reason the flame is extinguished, the flickering will
stop and the board will shut down the heater. If the green (signal) wire is
disconnected, the board will shut down. If all the wires are properly connected with
module flashing and the board still shuts down, diagnostic code
7
Flame Out, the
board may be defective.
5.22 REDUCED
OUTPUT
The heater may run without faulting, but at a reduced output. If this is noticed, it could be caused by the
following:
1.
High altitude
2.
Dirty nozzle (see page 6-2)
3.
Defective regulator
4.
Too small a nozzle
5.
Poor water circulation (see page 3-12)
6.
Ash deposit in combustion chamber (see page 6-2)
5.23 SMOKEY,
SMELLY
EXHAUST
The heater may run without faulting, but you may experience signs of soot, exhaust smoke and/or a
pungent smell. This is usually caused by the wrong fuel to air mixture. This can be affected by the
following:
1. Low voltage
2.
High altitude
3.
Dirty compressor air filter
4.
Low compressor air output
5.
Restricted combustion air flow (intake hose / exhaust hose / combustion chamber)
6.
Low combustion fan output (defective motor / wrong rotation (see page 8-7) / dirty fan blade)
7.
Partially clogged grooves in nozzle distributor ( see page 6-2)
Summary of Contents for CO105D
Page 14: ...Figure 2 1 Component Parts CO Model See Chapter 8 for complete Parts Listing...
Page 15: ...Figure 2 2 Typical Installation...
Page 51: ...FIGURE 8 1 HEATER ASSEMBLY...
Page 52: ...FIGURE 8 2 COMPONENT BOX ASSEMBLY...
Page 53: ...FIGURE 8 3 WATER JACKET AND BURNER BOX ASSEMBLY...
