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4.7.4 Fan Motor
Item
Supplies combustion air for the burner and purges exhaust flue gas.
Function
To maintain gas input over long flue runs, the fan use APS to provide ideal combustion levels.
1. Fan speed failure: When fan speed is approximately 0 rpm.
Fault
2. A fan assembly screw is loose and/or the fan is disassembled.
3. Disconnected or defective fan connection terminal assembly.
1. Erratic combustion.
Symptoms
2. Vibration and noise coming from the boiler.
3. The boiler does not operate correctly.
Error codes
E109, E110
1. Visual inspection: check the fan's wiring connections and mounting.
Diagnostics
2. Voltage test: Test the fan voltage for the specified voltage shown below.
Testing/inspection
Black - Yellow: DC 340 V
information
Description
System Details
43
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Troubleshooting
