Removing
To remove the air damper control motors, perform the following steps.
1. Disconnect a wire from the negative plug of the storage battery.
2. Remove the radio.
Pic. 18.8. Electric motors for controlling air dampers of an air conditioner with automatic control: 1 – the bottom cover of the panel of devices; 2 - electric motor for the drive of external air exchange dampers; 3 - electric motor of the air mixing damper drive assembly; 4 - glove box; 5 - electric motor for driving the dampers of internal and external air exchange; 6 - side cover (both sides); 7 - radio
3. Loosen the screws and remove the side covers 6 from both sides (pic. 18.8).
4. Turn away screws, disconnect an electric socket and remove the electric motor 3 of a drive of the damper of mixing of air in gathering.
5. Remove the bottom cover of the panel of devices.
6. Remove the electric motor 2 of the external air exchange damper drive.
7. Remove the glove box.
8. Turn away screws, disconnect an electric socket and remove the electric motor 5 of a drive of gates of internal and external air exchange.
Examination
Pic. 18.9. The location of the connector pins and checking the electric motor for the drive of the dampers of the internal and external air exchange: 1 – drive lever for dampers of internal and external air exchange
1. When checking the motor for driving the dampers of the internal and external air exchange, make sure that the lever moves when the battery voltage is applied to the contacts «1» And «3» side motor connector (pic. 18.9). Also make sure that the lever moves in the opposite direction when the polarity is reversed.
Attention! Turn off the power supply if the damper is inside or outside the duct. If the motor shaft does not rotate when power is applied, turn off the power supply.
Pic. 18.10. The location of the connector pins and checking the air mixing damper motor: 1 - air mixing damper drive lever
2. When checking the air mixing damper motor, check that the lever moves when battery voltage is applied to the terminals «1» And «3» side motor connector (pic. 18.10). Also make sure that the lever moves in the opposite direction when the polarity is reversed.
Attention! Turn off the power supply if the damper is in the position «MAX HOT» or «MAX COOL». If the motor shaft does not rotate when power is applied, turn off the power supply.
Pic. 18.11. The location of the connector pins and checking the external air damper drive motor: 1 - external air exchange drive lever
3. When checking the external air damper motor, make sure that the lever moves when battery voltage is applied to the terminals «1» And «3» side motor connector (pic. 18.11). Also make sure that the lever moves in the opposite direction when the polarity is reversed.
Attention! Turn off the power supply if the damper is in the position «DEF» or «FACE». Turn off the power supply if the motor shaft does not rotate when it is applied.
4. When testing the potentiometer, connect the tester to the terminals «2» And «5» connector of the motor assembly and check that the resistance changes smoothly when moving the damper from the position «DEF» up to the position «FACE» (see fig. 18.11).
Rated resistance, kOhm:
- position «DEF» - about 4.82;
- position «FACE» - about 0.18.
Installation
Installation is carried out in the reverse order of removal.