Thermo King 914 724, Manual

Page: 43 / 111

Electrical Maintenance (Rev. 1/99)
33
CAB CONTROL BOX COMPONENTS
(OPTIONAL)
Temperature Control Module (TCM)
The TCM is located in the cab control box. The TCM con-
tains the thermometer and the thermostat. The thermometer
and the thermostat share the same digital LED display and
use the same sensor.
1. Thermometer
2. Potentiometer
3. Thermostat
4. Locking Thermostat Dial
Remote Control Box Components
1
3
4
2
AGA295
3. Use a known good thermometer (or a 32 F [0 C] ice-
water bath) to check the switch points. The unit should
shift from cool to null at 32 F (0 C).
4. If the unit shifts modes properly and is out of calibra-
tion by less than 5 F (2.7 C), recalibrate the thermostat
by loosening the set screw and repositioning the ther-
mostat dial.
If the thermostat shifts modes erratically or is out of
calibration by more than 5 F (2.7 C), at least one of the
thermostat components is faulty. Test the thermostat
components and make the needed repairs before cali-
brating the thermostat.