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SiBE041012_A
Control Specification
Function and Control
44
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
1. Target discharge pipe temperature control
Detail
The followings are the examples of control which function in each mode by the outdoor
electronic expansion valve control.
h
: function
−
: not function
Under defrost control
Cooling
Starting control
−
h
−
−
−
−
−
−
Control when the frequency changes
−
−
h
−
h
−
−
−
Target discharge pipe temperature control
−
−
−
h
−
−
−
−
−
−
−
−
−
h
h
−
High discharge pipe temperature control
−
h
h
h
h
h
h
h
h
h
−
−
−
Pressure equalizing control
h
−
−
−
−
−
−
−
Opening limit control
−
h
−
Heating
Starting control
−
h
−
−
−
−
−
−
Control when the frequency changes
−
−
h
−
h
−
−
−
Target discharge pipe temperature control
−
−
−
h
−
−
−
−
−
−
−
−
−
h
h
−
High discharge pipe temperature control
−
h
h
h
h
−
−
−
Defrost control
−
−
−
−
−
−
−
h
Pressure equalizing control
h
−
−
−
−
−
−
−
Opening limit control
−
h
h
h
h
h
h
−
Control for disconnection of the discharge
pipe thermistor
When the power turns on or when the compressor
stops
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
During target discharge pipe temperature control
When the frequency changes under starting control
When the operation starts
Control for disconnection of the discharge
pipe thermistor