KAMAZ 5490 Operation Manual page 213

Combustion detector
malfunction
5
Overheating sensor malfunction
6
Heat sensor malfunction
Circulation pump malfunction
7
Fuel pump malfunction
Inadvertent switching off,
overvoltage
9
Inadvertent switching off,
undervoltage
Excessive ventilation time
10
Check the leads. Check the ohmic resistance between the detector plug
pins. In case of rupture the ohmic resistance is more than 1 Ohm, and the
combustion detector shall be replaced.
Check the leads. Output signal and voltage are in linear dependence
from the temperature (0 °C corresponds to 2.73 V and with temperature
increase for 1 °C output signal increases for 10 mV correspondingly).
Check the sensor and replace, if necessary.
Check the electric wiring of the circulation pump for the short circuit;
check the circulation pump itself and replace, if necessary.
Check the electric wiring of the fuel pump for the short circuit, check the
pumping capacity and replace the pump, if necessary.
Check the battery, voltage regulator and entrance wiring. Voltage
between pins 4 and 7 contacts of XS1 connector shall not be more than
30 V.
Check the battery, voltage regulator and entrance wiring. Voltage
between pins 4 and 7 of XS1 connector shall not be less than 20 V.
The pre-heater is not cooled enough during purging. Check the air
supply system to the combustion and exhaust gas-escape channel. Check
the combustion detector and replace, if necessary.
15