Wintac CargoWatch OP Mode

Hi,I work at a trucking comapny, and we just got Wintrac software from Thermo King. I downloaded the info from the reefer and had a couple of questions. Can someone explain what these different OP modes mean in Wintrac Cargo Watch.

- Diesel, Cycle-Sentry, Null
- Diesel Cycle-Sentry,Null- Running

Also, can someone explain, what the different temperatures mean;

- Return Control
- Discharge COntrol
- Coil

Thanks.

- Diesel, Cycle-Sentry, Null - unit cycled off
- Diesel Cycle-Sentry,Null- Running - diesel engine running, not in cool defrost or heat- null=nothing

- Return Control - has two sensors display and control, the load temperature
- Discharge Control- what the fridge is discharging
- Coil - the evaporator

hope this simple explanation is what you want