Electrical System

The unit’s controls and refrigeration components operate on 12 Vdc.

These units have a hermetic motor-compressor. This compressor is powered from the Compressor Drive Module (CDM), which is a 12/230 VAC inverter, taking power from either or all of the following battery sources (depending on the options supplied in the unit):

• Vehicle Battery

• Auxiliary Battery (option)

• Extended Battery in hold-over functionality (if activated)

Two AC/DC converters in the condenser unit converts the shore power supply to 12 Vdc to operate the unit’s controls and refrigeration components in stand-by mode. The unit also features START/STOP and Increased Idle Speed functionalities to enhance refrigeration performance during extended engine stops due to vehicle START/STOP activation (e.g., traffic jams, urban areas with many traffic lights). These functionalities require external vehicle support for START/STOP control and Increased idle speed adjustment. For further details, consult your Thermo King Dealer Representative.