KAMAZ 5490, Operation Manual

Page: 213 / 327

15
5
Combustion detector
malfunction 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.
6
Overheating sensor malfunction
Heat sensor malfunction 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.
7
Circulation pump malfunction
Fuel pump malfunction 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
.
9
Inadvertent switching off,
overvoltage
Inadvertent switching off,
undervoltage
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.
10
Excessive ventilation time 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.