Safety   protection  | Delay,   overcurrent, overheating, phase sequence, phase loss protection  | Delay,   overcurrent, overheating, phase sequence, phase loss protection  | Delay,   overcurrent, overheating, phase sequence, phase loss protection  | Delay,   overcurrent, overheating, phase sequence, phase loss protection  | Delay,   overcurrent, overheating, phase sequence, phase loss protection  | 
Screen display  | LCD screen, key   operation  | LCD screen, key   operation  | LCD screen, key   operation  | LCD screen, key   operation  | LCD screen, key   operation  | 
Condensing coil  | Φ19 Copper tube   nickel plated  | Φ19 Copper tube   nickel plated  | Φ19 Copper tube   nickel plated  | Φ19 Copper tube   nickel plated  | Φ19 Copper tube   nickel plated  | 
Material  | Cold plate spray   anticorrosion  | Cold plate spray   anticorrosion  | Cold plate spray   anticorrosion  | Cold plate spray   anticorrosion  | Cold plate spray   anticorrosion  |