204 Outdoor Unit
Function
1.1 Normal operation
1.2 Compressor control
Fuzzy control : Maintain evaporating temperature(Te) on constant state on cooling mode and condensing
temperature(Tc) on constant stage on heating mode by Fuzzy control to ensure the stable system perfor-
mance.
1.3 Main and sub unit's LEV control
(1) Main LEV's fuzzy control
Main LEV operates with fuzzy control rules to keep the evaporator outlet super Heat(Superheat) stable
state during heating mode
Superheat = Tsuction - Tevaporation
Tsuction : temperature at suction pipe sensor(ËšC)
Tevaporation : evaporation temperature equivalent to low pressure(ËšC)
(2) Sub LEV's fuzzy control
Sub LEV operates with the same rules of main LEV, but the operating range is Limited by main LEV's
current opening rate
- Limited conditions : liquid back control, discharge temperature control etc.
1. Basic control
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