Engine: Refrigeration AC

1. A the frost can be removed by passing hot gas through the coils or energizing defrost heaters with the evaporator fan shut down
2. B the frost can be removed by passing hot gas through the coils or energizing defrost heaters with the evaporator fan still running
3. C the frost will increase the refrigeration effect
4. D the frost can be quickly removed by simply shutting down the compressor

Tip: press A-D to answer