Troubleshooting
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Faults and their solutions - engine
If problems or repairs can not be clearly identified or solved please contact
the customer service department or your Rosenbauer representative.
Cooling circuit Coolant fluid level too low Localise leaks and fix them
Pressurise the cooling system (max. 1.1
bar)
Add coolant
Air in cooling system Check / clean thermostat bleed hole
Add coolant and ventilate the system
Thermostat defective (does
not open)
Replace thermostat
Regular engine temperature
>92 °C
Check pipe coil of water / heat exchanger
for calcification
Temperature sensor defective Check resistance and replace is neces-
sary
Check electrical harness and repair if nec-
essary
Radiator cap defective Check opening pressure (1.1 bar) and re-
place cap if required
Cooling fan does not run Air in cooling system (thermostatic switch
malfunction)
Check voltage supply (fuse, relay, etc.)
Check temperature sensor and replace if
necessary
replace fan motor if necessary
Engine dies away /
poor idling
Suction system leakage air Check air filter box and connecting pieces
for cracks and replace if necessary
Spark plug electrode gap too
large
Measure electrode gap. If the electrode
gap is outside the tolerance, replace spark
plugs.
Failure Cause Remedy
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