Atlas Copco QAC 1100 Sd, Instruction Manual

Page: 46 / 64

- 46 -
Blue or white smoke leaving the exhaust pipe
– Wrong lube oil grade.
– Faulty cold start system.
– Too low engine temperature.
The engine trips out
– Faulty fuel pump.
– Faulty atomizers or wrong atomizer type.
– Faulty cold start system.
– Wrong fuel type or grade.
– Too high engine temperature.
– Wrong valve clearances.
The engine runs improperly
– Faulty fuel control.
– Squeezed fuel pipe.
– Faulty fuel pump.
– Dirty fuel filter element.
– Squeezed air filter/purifier or induction system.
– Air in the fuel system.
– Faulty atomizers or wrong atomizer type.
– Faulty cold start system.
– Obstructed fuel tank vent openings.
– Restricted movement of engine speed control.
– Too high engine temperature.
– Wrong valve clearances.
Vibration
– Faulty atomizers or wrong atomizer type.
– Restricted movement of engine speed control.
– Too high engine temperature.
– Damaged fan.
– Failure in engine assemblingor in the flywheel
case.
Too high lube oil pressure
– Wrong lube oil grade.
– Damaged indicator.
Too high engine temperature.
– Squeezed air filter/purifier or induction system.
– Faulty atomizers or wrong atomizer type.
– Faulty cold start system.
– Squeezed exhaust pipe.
– Damaged fan.
– Too much lube oil in the collector.
– Squeezed air tubes or radiator coolant fluid tubes.
– Not enough coolant fluid in the system.
Pressure in engine sump
– Squeezed vent tube.
– Leaking intake tube or faulty exhaust fan.
Bad compression
– Squeezed air filter/purifier or induction system.
– Wrong valve clearances.
Engine starts and stops
– Dirty fuel filter element.
– Squeezed air filter/purifier or induction system.
– Air in the fuel system.
Engine switches off after nearly 15 seconds
– Bad connection to the oil pressure switch/
coolant fluid temperature switch.