Daikin FTXS36HVJU - Electronic Expansion Valve Control

Control Specification SiUS04-924_A
Function and Control 37
3.11 Electronic Expansion Valve Control
Outline The following items are included in the electronic expansion valve control.
Electronic expansion valve is fully closed
1. Electronic expansion valve is fully closed when turning on the power.
2. Pressure equalizing control
Open Control
1. Electronic expansion valve control when starting operation
2. Electronic expansion valve control when the frequency changes
3. Electronic expansion valve control for defrosting
4. Electronic expansion valve control when the discharge pipe temperature is abnormally high
5. 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 electronic expansion
valve control.
h: function
− : not function
When the operation starts
Under defrost control
Cooling
Starting control
h
Control when the frequency changes
h
h
hh
h
h
hhh
h
h
hh
hhhh
hh
h
h
hh
h
hhh
h
Target discharge pipe temperature control
High discharge pipe temperature control
Pressure equalizing control
Opening limit control
Heating
Starting control
Control when the frequency changes
Target discharge pipe temperature control
High discharge pipe temperature control
Defrost control
Pressure equalizing control
Opening limit control
(R14458)
When the power turns on or when the compressor stops 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
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–
–
–
–
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–
h
–
–
hhhh
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–
–
h
–
–
–
–
–
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Control for disconnection of the discharge
pipe thermistor
Control for disconnection of the discharge
pipe thermistor