KAMAZ 5490 Operation Manual page 212

8.2 Other faults are listed in Table 2.
Table 2
Number of
LED Fault
blinks
Overheating
1 The risk
Temperature difference between
the readings of the overheating
sensor and heat sensor is too
big.
No more tries to start the pre-
2 heater left
Interruption of combustion
3
Glow plug malfunction
4
Air pump motor malfunction
Notes/ Troubleshooting
Heat/ overheating sensor indicates temperature higher 102 °C.
Thoroughly check the complete liquid circuit and circulation pump
operation.
of overheating. Difference between temperature measured by the heat sensor and
overheating sensor is more than 20 °C (i.e. reading of the overheating
sensor or heat sensor is above 70 °C). Check the overheating sensor or
heat sensor and replace with a new one, if necessary.
Check circulation pump for correct operation.
In case there is no more tries to start the pre-heater left, check fuel
supply and amount of fuel supplied. Check the air supply system to the
combustion and exhaust gas-escape channel.
Check fuel supply and amount of fuel supplied. Check the air supply
system to the combustion and exhaust gas-escape channel. If the pre-
heater starts, check the combustion detector and replace, if necessary.
Check the fine fuel filter for clogging up.
Check the glow plug, replace if necessary.
Check the electric wiring of the air pump motor; replace the air pump, if
necessary.
14