Control Specification
SiENBE04-925_A
46
Function and Control
Detail
When the starting control (cooling :
seconds, heating :
seconds) finishes, the detection
timer for disconnection of the discharge pipe thermistor (
seconds) starts. When the timer is
over, the following adjustment is made.
1. When the operation mode is cooling
When the following condition is fulfilled, the discharge pipe thermistor disconnection is
ascertained.
Discharge pipe tempe 6°C < outdoor heat exchanger temperature
2. When the operation mode is heating
When the following condition is fulfilled, the discharge pipe thermistor disconnection is
ascertained.
Discharge pipe tempe 6°C < indoor heat exchanger temperature
Adjustment when the thermistor is disconnected
When the disconnection is ascertained, the compressor continues operation for 9 minutes and
then stops.
When the compressor stops repeatedly, the system is shut down.
3.11.7 Control when frequency is changed
When the target discharge pipe temperature control is active, if the target frequency is changed
for a specified value in a certain time period, the target discharge pipe temperature control is
canceled and the target opening of the electronic expansion valve is changed according to the
shift.
3.11.8 Target Discharge Pipe Temperature Control
The target discharge pipe temperature is obtained from the indoor and outdoor heat exchanger
temperature, and the electronic expansion valve opening is adjusted so that the actual
discharge pipe temperature becomes close to the target discharge pipe temperature. (Indirect
SH (superheating) control using the discharge pipe temperature)
The electronic expansion valve opening and the target discharge pipe temperature are adjusted
every 20 seconds. The target discharge pipe temperature is controlled by indoor heat
exchanger temperature and outdoor heat exchanger temperature. The opening degree of the
electronic expansion valve is controlled by followings.
♦
Target discharge pipe temperature
♦
Actual discharge pipe temperature
♦
Previous discharge pipe temperature
20 class
25 class
35 class
(seconds)
10
10
10
(seconds)
120
30
30
(seconds)
810
630
630
SC
(Supercool)
SH
(Superheat)
The target discharge pipe
temperature is set as to become the
aiming SH.
The inclination does not change
depending on the operating
condition.
(R10626)
SIENBE04-925_A_FRONT.pdf 60
24/02/2011 13:53:52
Summary of Contents for RXL25G2V1B
Page 8: ...SiENBE04 925_A vi Table of Contents ...
Page 14: ...Introduction SiENBE04 925_A xii ...
Page 15: ...SiENBE04 925_A List of Functions 1 Part 1 List of Functions 1 Functions 2 ...
Page 17: ...SiENBE04 925_A Specifications 3 Part 2 Specifications 1 Specifications 4 ...
Page 20: ...Specifications SiENBE04 925_A 6 Specifications ...
