Scheme of switching on the electric motor of the heater fan
1 - generator; 2 - storage battery; 3 - ignition switch; 4 - fuse block; 5 – heater switch; 6 - additional resistor; 7 - heater fan motor
Heater Heater Motor Parts
1 - lock washer; 2 - washers; 3 - body; 4 - anchor; 5 - crackers; 6 - cover
Data for verification
Rated voltage, V | 12 |
Rated power, W | 20 |
Shaft speed when the motor is loaded with an impeller at a voltage of 12 V and temperature (25±10) °С, min–1 | 3000 ± 150 |
Consumed current at the specified load and speed, no more than, A | 4,5 |
Low frequency of rotation of the armature shaft with impeller, min–1 | 2200 ± 150 |
Current consumption at armature speed 2200 min–1, no more, A | 2,7 |
Electric motor ME-255 - direct current with excitation from permanent magnets.
When an additional resistor 6 is connected to the power supply circuit of the electric motor, the armature shaft rotates at a reduced frequency. The resistor is secured with two spring washers in the heater fan housing. The resistance value of the resistor is 1.5 ohms at 20°C.
A defective electric motor is recommended, as a rule, to be replaced with a new one. The only possible repair is cleaning the collector.
1. Loosen cover screws 6 (see fig. Heater Heater Motor Parts) and take it off.
2. Then remove the lock washer 1 from the armature shaft and remove the armature 4 from the housing.
3. Assembly is carried out in reverse order.
4. Checking the technical condition is similar to that described for the windshield wiper motor (see subsection 11.4.1.2).