Airwell YEVFD Series, Service Manual

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1.2 Feature
• Inside Parts Upgrading to Increase Energy Efficiency

Full DC fan motor,

Zigzag design, reduce airflow
disturbance, less vibration, less
pressure loss

Super big diameter of 550mm, enhance
heat exchange efficiency(Full series)

Particular structure for
increased wind -
cooled PCB effect.
(Full series)

Change the exchanger pipe diameter
from Φ 8 to Φ 7 with 0.1mm high
efficiency corrugated fins, increasing
the heat exchanger area and improving
exchanger efficiency by 30%(Full
series)

Larger capacity full DC inverter
compressor

Double rotor compressor,
adopts keel motor technology,
efficiency increased by 10%
compared to the normal type
(full series)

Tube in tube type two stage
sub-cooling design, enhance
efficiency. (double fan 4/5/6HP)

PID control to realize more
precise control of
opening degree of EEV,
compressor rotation speed,
fan speed (Double fan )
• Double pressure sensor with PID control
Implement advanced high/low voltage control
technology of compressor, which could adjust target
evaporation/ condensation temperature properly to
increase compressor frequency, ensuring the ambient
temperature reaching the setting temperature as
soon as possible.
•
Intelligent defrosting technology
Intelligently judge the frosting degree by the change of low pressure and defrost temperature sensor, the ODU will
enter defrosting program only after the change reaching a specific value to extend the heating time and improve
user experience.
3