103
Problem
Fuel cut, bad combustion
Overheat of preheater body
Abnormal shut off of com-
bustion when operating
Cause
1. Not enough fuel supply by water and
debris in fuel line
2. Leakage of fuel line
3. Lack of combustion air
4. Fuel pump under quality
5. Bad injection of burner nozzle
1. Heat exchanger water valve shut off
2. Air in water line or body
3. Big resistance in water flow
4. Lack of water flow by old water pump
5. Bad adjustment of overheat sensor set-
ting
1. Overheat by blocking in water flow or
lack of water
Maintenance
1Ŕ3. Pipe retightening, clean water, debris
of intake, exhaust tube.
4. Change
5. Change or clean nozzle
1. Open the valve
2. Bleed air
3. Inspection and repair of line
4. Change parts
5. Change
1. Remove the cause of overheat, operate
the push button of overheat sensor.
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