hi chillerman

thank you very much for the reply. may i ask what technical info do i need to resolve this prob.
on another note, when loading to a reefer van, which is better
1. precool to setpoint (-20C), turn off unit, then immediately load frozen(-18C) products at ambient temp or
2. precool to setpoint, turn off unit, open doors and allow container to reach ambient, ensure all water(condensate) inside container is evaporated before loading frozen products

sorry for taking so much of your time