1 Key Specifications/Special Features Meaning of the index lights on the panel Index light Name Light Flash 1 (6) Temp setting In the state of temp setting - 1 (7) Refrigeration Refrigerating Ready to refrigerate, in the state ofcompressor start delay protection 1 (1) Heat Heating Ready to heat, in the state of compressorstart delay protection 1 (2) Defrost Defrosting Dripping or the state of compressor startdelay protection 1 (3) Fan Fan running - 1 (4) Alarm - Alarm state Main Function Temperature display, temperature controlling(refrigeration/heat mode), compressor startdelay protection, it can run periodically with the on-off rate when the temperature sensor is broken. 2 defrost modes (electric heat, hot gas), 3 defrost start mode (time alternation, accumulative compressor running time, real time clock), 2 defrost end mode (timing, controlled by both temperature and time), dripping, manual defrost, 7 fan running modes(fan ahead or delay start, delay stop, temperature controlling start and stop, time controlling start and stop, always on,always off, run or stop when defrosting), high and low temperature alarm, sensor error alarm, one external alarm input, password, real time clock, C/F unit change. -