SUPPORT AS 2882216 - Caterpillar

Functions
Illustration 1 g01132097
The microcomputer sends signals to the DC motor. This changes the discharge positions in order to control the damper position for the following settings:
MAX COOL
MAX HOTChecking and Maintenance
Illustration 2 g01132098
(R) Resistance (kOhms) (T) Temperature
Table 1
Resistance (kOhms) between terminal (1) and terminal (3) in certain damper settings    
Damper setting     Resistance value (kOhms)    
MAX COOL     1.2    
MAX HOT     4.8    If any of the values deviate from the chart above, replace the motor.When the resistances have been checked, check the continuity at normal voltage. Adjust the damper setting to HOT. Voltage should be 24 V at terminal 18. When you move from HOT to COOL (terminal 17) the voltage should read 0 V. Next, set the damper to COOL (terminal 17). The voltage should be 0 V. Move the damper to HOT (terminal 18). The voltage should be 24 V.