... . R&D available 4. ISO9001:2000 5.control temperature NAKF121T SpecifictionsMain function:Temperature display, Refrigeration ,Defrost Control;Compressor overload, phase lack, sequence protection;Crankshaft ... cooling water pump (optional);With a tripping device with buzzer;Temperature display range: -50°C~125°CTemperature setting range: -45° ... 5KW,7.5KW,10.5KW (About 8Ph,10Ph,15Ph) electric control box