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2.5 OPERATION MODES AND CONTROL
There are two main types of operation modes: the cargo cooling control mode and the unit
inspection mode.
The cargo cooling control mode is explained in this section.
※For the unit inspection mode, refer to section 3.9.
The relationship between the operation mode and setting temperature is as follows.
※For details, refer to section 2.5.1 to 2.5.4
Operation mode Setting temperature Control sensor Operation description
Frozen mode
–10.1˚C to –30.0˚C
Return air
Compressor ON/OFF control
(+13.8˚F to –22.0˚F)
temperature sensor
Partial frozen
–3.0˚C to –10.0˚C
Return air
Capacity control operation
mode
(+26.6˚F to +14˚F)
temperature sensor
with suction modulating valve
and hot-gas bypass control
+25.0˚C to –2.9˚C
Supply air
Capacity control operation
Chilled mode
(+77˚F to +26.8˚F)
temperature sensor
with suction modulating valve
and hot-gas bypass control
Defrosting mode – –
Hot-gas defrosting with
refrigerant metering control
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