Component name Pull-down
Capacity
Heat-up
Overcool
control protection
Compressor CC ON ON ON OFF
Evaporator fan. High speed EFH ON ON ON ON
Evaporator fan. Low speed EFL OFF OFF OFF OFF
Condenser fan CF ON / OFF※1 ON ON / OFF※4 OFF
Liquid solenoid valve LSV ON ON OFF OFF
Economizer solenoid valve ESV ON OFF OFF OFF
Injection solenoid valve ISV ON / OFF※2 ON / OFF※5 ON / OFF※3 OFF
Hot-gas solenoid valve HSV OFF ON / OFF※5 ON OFF
Defrost solenoid valve DSV OFF ON / OFF※5 ON OFF
Discharge gas by-pass solenoid valve
BSV OFF ON / OFF※5 OFF OFF
Reheat solenoid valve RSV ON / OFF※6 OFF OFF OFF
Suction modulating valve SMV
100% 3 to 100% 100% 100%
Electronic expansion valve EV
200~2000pls 200~2000pls 0pls 1000pls
2-20
2.5.2 Chilled and partial frozen mode
Control state transition and common control
START
TS<SP+1.5˚CTS≧SP+1.5˚C
Overcool protection
Capacity control
Pull-down
Heat-up
TS : Control temperature (supply air sensor or return air sensor)
SP: Set point temperature
TS≦SP+1.5˚C RS≧SP+1.0˚C
TS≧SP+5.0˚C
TS≧SP+1.0˚C
and 3-minutes
elapse
(TS≦SP–3.0˚C
and 3-minutes elapse)
or (
TS≦SP–0.5˚C
and 30-minutes elapse)
TS≦SP–0.5˚C and 3-minutes elapse
Magnetic
contactor
Operation of magnetic contactor and solenoid valve
Note) ※1: High pressure control ※4: Release control
※2: Injection control ※5: Capacity control and hot gas by-pass
※3: Charge control ※6: RSV:OFF RS≦20˚C、RSV:ON RS≧25˚C
Solenoid valve
02LXE10E-A(17-29)07.2.2015:39ページ2-20