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SiENBE04-925_A
Control Specification
Function and Control
47
3.12 Malfunctions
3.12.1 Sensor Malfunction Detection
Sensor malfunction may occur in the thermistor.
Relating to Thermistor Malfunction
1. Outdoor heat exchanger thermistor
2. Discharge pipe thermistor
3. Radiation fin thermistor
4. Outdoor temperature thermistor
3.12.2 Detection of Overcurrent and Overload
Outline
An excessive output current is detected and, the OL temperature is observed to protect the
compressor.
Detail
If the OL (compressor head) temperature exceeds 120 ~ 130°C (depending on the model),
the system shuts down the compressor.
If the inverter current exceeds 9.25 ~ 20 A (depending on the model), the system shuts down
the compressor.
3.12.3 Refrigerant Shortage Control
Outline
I Detecting by power consumption
If the power consumption is below the specified value and the frequency is higher than the
specified frequency, it is regarded as refrigerant shortage.
The power consumption is small comparing with that in the normal operation when refrigerant is
insufficient, and refrigerant shortage is detected by checking a power consumption.
II Detecting by discharge pipe temperature
If the discharge pipe temperature is higher than the target discharge pipe temperature, and the
electronic expansion valve is fully open for more than the specified time, it is regarded as
refrigerant shortage.
III Detecting by the difference of temperature
If the difference between suction and discharge temperature is smaller than the specified value,
it is regarded as refrigerant shortage.
Refer to “Refrigerant shortage” on page 112 for detail.
Frequency
Power consumption
Refrigerant shortage zone
(R12184)
48 ~ 55 Hz
(depending on
the model)
(R1391)
Target discharge
pipe temperature
Refrigerant shortage
zone
SIENBE04-925_A_FRONT.pdf 61
24/02/2011 13:53:53
Содержание Inverter FTXL20G2V1B
Страница 8: ...SiENBE04 925_A vi Table of Contents...
Страница 14: ...Introduction SiENBE04 925_A xii...
Страница 15: ...SiENBE04 925_A List of Functions 1 Part 1 List of Functions 1 Functions 2...
Страница 17: ...SiENBE04 925_A Specifications 3 Part 2 Specifications 1 Specifications 4...
Страница 20: ...Specifications SiENBE04 925_A 6 Specifications...
Страница 186: ...SiENBE04 925_A Outdoor Unit RXL20G2V1B Removal Procedure 171 4 Feature of the thermistors Step Procedure Points R9356...