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SiUS041501E
Control Specification
Function and Control
46
Discharge pipe tempe6°C (+10.8°F) < 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 tempe6°C (+10.8°F) < indoor heat exchanger temperature
When the thermistor is disconnected
When the disconnection is ascertained, the compressor continues operation for 9 minutes and then
stops.
If the compressor stops repeatedly, the system is shut down.
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
A
seconds. The opening degree of the electronic expansion valve is adjusted by the
followings.
Target discharge pipe temperature
Actual discharge pipe temperature
Previous discharge pipe temperature
+
The time depends on the opening of the electronic expansion valve.
09/12 class
RKN18NMVJU
RXN18NMVJU
RK(X)18NMVJU
24 class
A
(seconds)
720
540
09/12 class
RKN18NMVJU
RXN18NMVJU
RK(X)18NMVJU
24 class
A
(seconds)
10 ~ 30
+
20
SC
(Subcool)
SH
(Superheat)
The target discharge pipe
temperature is set as to become
the aim SH.
The inclination does not change
depending on the operating condition.
(R18921)
Summary of Contents for FTKN09NMVJU
Page 12: ...SiUS041501E 1 List of Functions Part 1 List of Functions 1 Functions 2...
Page 59: ...SiUS041501E Remote Controller 48 Part 5 Remote Controller 1 Cooling Only 49 2 Heat Pump 51...
Page 65: ...SiUS041501E Service Diagnosis 54 5 13 Power Module Check 100...
Page 132: ...Revision History Month Year Version Revised contents 03 2015 SiUS041501E First edition...