Daikin FTXN25KEV1B, Руководство по обслуживанию

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SiBE041102_A Control Specification
Function and Control 31
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 equalization 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
: Holding Functions
−
: No Functions
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