Chilled And Partial Frozen Mode - Daikin LXE10E-A Service Manual

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2.5.2 Chilled and partial frozen mode

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