Daikin Super Multi NX C-Series Service Manual

Also see for 2MKD58BVM: Pocket Manual Service manual

Contents

Daikin Super Multi NX C-Series Service Manual Manual pdf 112 page image

SiE12-411 Control SpecificationFunction and Control 1013.13 Malfunctions3.13.1 Sensor Malfunction DetectionSensor malfunction may occur either in the thermistor or current transformer (CT) system.Relating to Thermistor Malfunction1. Outdoor heat exchanger thermistor2. Discharge pipe thermistor3. Fin thermistor4. Gas pipe thermistor5. Outdoor air temperature thermistor6. Liquid pipe thermistorRelating to CT MalfunctionWhen the output frequency is more than 55 Hz and the input current is less than 1.25A, carryout abnormal adjustment.3.13.2 Detection of Overload and Over CurrentOutline In order to protect the inverter, detect an excessive output current, and for protectingcompressor, monitor the OL operation.Detail " If the OL (compressor head) temperature exceeds 130°C (for the 2YC32) (120°C for3MXS52BVMB) or 130°C (for the 2YC45), the compressor gets interrupted." If the inverter current exceeds 30 A, the compressor gets interrupted too.3.13.3 Insufficient Gas ControlOutline If a power consumption is below the specified value in which the frequency is higher than thespecified frequency, it must be regarded as gas insufficient.In addition to such conventional function, if the discharge temperature is higher than the targetdischarge pipe temperature, and more than the specified temperature, and the electronicexpansion valve is fully open (450 pulses) more than the specified time, it is considered as aninsufficient gas.With the conventional function, a power consumption is weak comparing with that in the normaloperation when gas is insufficient, and gas insufficiency is detected by checking a powerconsumption.When operating with insufficient gas, although the rise of discharge pipe temperature is greatand the electronic expansion valve is open, it is presumed as an insufficient gas if the dischargepipe temperature is higher than the target discharge pipe temperature.FrequencyPower consumption Insufficient gas zone55 Hz(R2834)(R1391)Gas insufficientzone