2-19
(1) Set point temperature and control sensor
When the set point temperature (referred to as SP hereafter) is –10.1˚C(+13.8˚F) or lower, the
compressor is operated ON and OFF, in response to return air temperature.
(2) Control
SP
SP+2˚C
–10˚C
SP+1˚C
SP–1˚C
SP–2˚C
A
C
qWhen the control temperature reaches SP (point A), the
compressor and condenser fan are turned off.
w
When the control temperature exceeds SP+1.0
˚
C, the compressor,
liquid solenoid valve and condenser fan are turned on.
However, the compressor runs for at least 2 minutes every
time once it is turned on. Even if the control temperature
becomes SP or lower (point C) within 2 minutes after the
compressor is turned on, the compressor, condenser fan
and liquid solenoid valve are not turned off. (2 minutes
compressor forced operation)
EV :Electronic Expansion Valve HSV:Hot Gas Solenoid Valve
LSV :Liquid Solenoid Valve ISV :Injection Solenoid Valve
DSV :Defrost Solenoid Valve BSV :Discharge gas Bypass Solenoid Valve
ESV :Economizer Solenoid Valve LPT :Low Pressure Transducer
DPR:Discharge pressure regulator HPT :High Pressure Transducer
SMV:Suction Modulation Valve HPS:High Pressure Switch
FROZEN (Return air < 5˚C)
02LXE10E-A(17-29)07.2.2015:39ページ2-19
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