AGG AS4300 - Fault mode 23: Coolant temperature above normal-sudden overheat; Fault mode 24: Coolant temperature below normal; Fault mode 25: Coolant contamination; Fault mode 26: Oil consumption too much

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Fault mode 23˖Coolant temperature above normal—sudden overheat
Possible cause Correction
Coolant level is too low
Check coolant level and engine external for
leakage, eliminating the leakage and adding the
coolant to be within the specified range
Coolant system hose(s) is collapsed and there is
leakage
Check the hose(s) and replace it if necessary
The drive belt is broken Check the drive belt and replace it if necessary
Fault of the coolant thermometer
Check the coolant thermometer and replace it if
necessary
Fault mode 24˖Coolant temperature below normal
Possible cause Correction
The radiator shutter is blocked at the maximum
opening
Check the radiator shutter and replace it if
necessary
Too much cold air flows though the radiator
Visually check the fan and fan clutch (if equipped)
for operation
Running in low ambient temperature Take measures to increase intake air temperature
Fault of the coolant thermometer
Check the coolant thermometer and replace it if
necessary
Fault mode 25˖Coolant contamination
Possible cause Correction
Improper coolant Choose the coolant specified in this manual
Coolant change interval too long Change coolant at the specified time
Fault mode 26˖Oil consumption too much
Possible cause Correction
The engine runs at idle speed for too long time Shorten the time of the engine running at idle
The oil level is too high
Check the oil level and make adjustment if
necessary
External oil leakage of the engine
Check the external pipeline, sealing gasket and
crankshaft seals for leakage and replace the
damaged components
The oil in the turbocharger leaks into the intake
system or exhaust system
Check the compressor inlet, air intake pipe and
turbine outlet for oil trace
Big blow-by push oil in crankcase to the
crankcase ventilation device
Check the crankcase ventilation device for oil trace
on its periphery
Air compressor pumps oil Check the air compressor outlet for oil trace
Oil is not correct Check the oil for its specification. Use correct oil
and change the oil and oil filter