Piping Diagram
Samsung Electronics 243
Defrost operation
▪ Purpose
▪ Concept
- Heat exchangers are checked for frost formation based on the heat exchanger temperature (Cond out, Suction) and
the heating duration.
- Cooling mode is on until the heat exchanger temperature (Cond out, Suction) reaches a specific level.
- If the heating duration indicates that defrost mode should start, the heat exchangers are checked for frost formation based on the
electric current rise of the outdoor fans and then heating mode is on for a maximum of 18 hours (learning-based defrost)
▪ Control specifications in detail
duration.
- Checking the heat exchanger temperature starts 30 minutes after Safety Start mode turns off. Defrost mode starts if the Cond out or
Suction temperature of each outdoor unit is -5℃-
ture and the Cond out or Suction temperature.
- Checking the duration starts after Safety Start mode turns off. Defrost mode starts if the outdoor temperature is 0℃ or higher and
℃-
℃ and heating mode has been on
outdoor temperature and heat exchanger temperature.
feature extends subsequent defrost mode, started based on the heating duration, up to 18 hours if the electric current in the fan does
not rise by 8% or more compared to the frost-free state .
℃ OR 15 min after defrost mode has started.
Actuator Behavior during defrost mode
Compressor
Active unit
Inactive unit
Outdoor EEV Full open
Outdoor Fan
Indoor EEV
Active unit 800 step
Inactive unit 400 step
Indoor Fan
OFF (if using the HR device, model-based control is performed on cooling indoor
Time Maximum of 15 min
7-3 Functions (cont.)
7-3-2-4 Special operation modes
7-3-2 Control (cont.)
To Next Page
Loading...
