Daikin FVXG25K2V1B, Руководство по обслуживанию, Страница: 59 / 147

SiBE061121_A Control Specification
Function and Control 49
3.11 Outdoor Electronic Expansion Valve Control
Outline The following items are included in the outdoor electronic expansion valve control.
Outdoor electronic expansion valve is fully closed.
1. Outdoor electronic expansion valve is fully closed when turning on the power.
2. Pressure equalizing control
Open Control
1. Outdoor electronic expansion valve control when starting operation
2. Outdoor electronic expansion valve control when the frequency changes
3. Outdoor electronic expansion valve control for defrosting
4. Outdoor electronic expansion valve control when the discharge pipe temperature is
abnormally high
5. Outdoor electronic expansion valve control when the discharge pipe thermistor is
disconnected
Feedback Control
Target discharge pipe temperature control
Detail The followings are the examples of outdoor electronic expansion valve control which function in
each operation mode.
Cooling
−
h
− − − − − −
− −
h
−
h
− − −
− − −
h
− − − −
− − − − −
h h
−
−
h h h h
h h h h h
− − −
h − − − − − − −
− h −
Heating
− h − − − − − −
− − h − h − − −
− − − h − − − −
− − − − −
h h
−
−
h h h h
− − −
− − − − − − −
h
h
− − − − − − −
−
h h h h h h
−
h
: Holding Functions
— : No Functions
Starting control
Control when the frequency changes
Target discharge pipe temperature control
Control for disconnection of the discharge
pipe thermistor
High discharge pipe temperature control
Pressure equalizing control
Opening limit control
Starting control
Control when the frequency changes
Target discharge pipe temperature control
Control for disconnection of the discharge
pipe thermistor
High discharge pipe temperature control
Defrost control
Pressure equalizing control
Opening limit control
When the power turns on or when the compressor stops When the operation starts When the frequency changes under starting control During target discharge pipe temperature control When the frequency changes under target discharge pipe temperature control When the disconnection of the discharge pipe thermistor is ascertained When the frequency changes under the control for disconnection of the discharge pipe thermistor Under defrost control