... Temperature measure &control :-50~+50 celsius 2. 3-load:compressor,fan,defrost 3. Power:3-phase,4 or 5 wires Brief introduction1. Temperature measure ... &control :-50~+50 celsius 2. 3-load:compressor,fan,defrost 3. Power:3-phase,4 or 5 wires 4. Double sensors Protection ... parameters even when the machine is running. Auto and manual switch function, while in manual operation, it can control fan, ...