Control Specification
SiMX042215E
42
Part 4 Functions and Control
3.8 Liquid Compression Protection Function
Outline
In order to increase the dependability of the compressor, the compressor is stopped according
to the outdoor temperature.
Details
Operation stops depending on the outdoor temperature.
The compressor turns off under the conditions that the system is in cooling operation and
outdoor temperature is below
A
°C.
3.9 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 when the discharge pipe temperature is abnormally high
4. Electronic expansion valve control when the discharge pipe thermistor is disconnected
Feedback Control
Target discharge pipe temperature control
Details
Following are the examples of the electronic expansion valve control for each operation mode.
A
(°C)
12/18 class
18
24 class
0
: Available
: Not available
Control
Status
Starting operation control
Control when the frequency changes
Target discharge pipe temperature control
Discharge pipe thermistor disconnection control
High discharge pipe temperature control
Pressure equalizing control
Opening limit control
Power on ; Compressor stop
Operation start
Frequency change under starting control
During target discharge pipe temperature control
Frequency change under target discharge pipe
temperature control
Discharge pipe thermistor disconnection
Frequency change under discharge pipe thermistor
disconnection control
(R2
8
33)
