7.11. Heating fan electric motor

Possible malfunctions of the electric motor of the fan of a heater and ways of their elimination



The electric motor 45.3730 with excitement from permanent magnets is used.
In the scheme of turning on of the electric motor the additional resistor 17.3724 is fixed by the screw on the top part of a casing of an air inlet in a motor compartment of the car.
The resistor has two spirals with a resistance of 0,23 and 0,82 Ohms. At inclusion in a power-supply circuit of the electric motor of both spirals the first speed of rotation of the fan is provided if the spiral with a resistance of 0,23 Ohms – the second speed is included. At turning on of the electric motor without resistor the fan rotates with the third maximum speed.
Replace the faulty electric motor new.
Data for check of the electric motor
Frequency of rotation of a shaft at electric motor loading a krylchatka at a voltage of 12 V
and temperature of (25±10) °C, mines-1..... 4100±200
The consumed current at the specified loading and frequency of rotation, And, no more..... 14