Danfoss Optyma iCO2, Инструкция по эксплуатации, Страница: 31 / 68

Instructions
118A5495A - AN405821998738en-000102 | 31 © Danfoss | Climate Solutions | 2023.02 | LCA012A024
• Flow chart of respective operations
Flow chart of operations is as shown below.
Is there error?
YES
NO
NO
NO
YES
NO
YES
NO
YES
NO
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
YES
YES
YES
NO
YES
NO
To
To
Low
pressure value >
pressure value equivalent to
set evaporation
temperature?
Hot gas bypass
solenoid valve opens.
Hot gas bypass
solenoid valve closes.
Compressor ordinary
control operation.
Compressor speed
increases.
Low pressure value<
stop setting pressure?
Compressor speed drops.
2 min. elapsed?
3 min.
delay time elapsed?
Compressor error stop
Subcool coil electronic
expansion valve ordinary
control operation.
Medium pressure
receiver inlet electronic
expansion valve ordinary
control operation.
Detected
Low pressure valve
≤ 5.8 bar for 2
seconds.
Medium pressure value
≤ compressor start
pressure setting
Gas cooler fan ordinary
control operation.
60 sec. elapsed?
60 sec. elapsed?
105 sec. elapsed? 105 sec. elapsed?
120 sec. elapsed?
60 sec. elapsed? 45 sec. elapsed?
Medium pressure
receiver inlet electronic
expansion valve initial
aperture.
Subcool coil electronic
expansion valve initial
aperture.
Compressor initial
speed operation.
Main power supply ON
Suction temperature setting
Outdoor temperature <5 °C
Operation switch ON
Low
pressure value >
pressure value equivalent to
set evaporation
temperature?
• Compressor stops
• Subcool coil electronic
expansion valve OFF (full closure)
• Medium pressure receiver inlet
electronic expansion valve OFF
(full open)
• Gas cooler fan OFF after delay
Detected
Low pressure valve
≤ 5.8 bar for 2
seconds.
Fig. 27