Panasonic Urban Multi MX1R Series Service Manual

Function PACD011001C240 Function Urban Multi “MX1, ME1 Series” Using R-22Outdoor UnitFunctionNotes Ñ During defrost or oil return, residual operation is not carried out even if a stop command comes.Ñ Forced thermostat OFF occurs if defrost or oil return signal comes during residual operation.1.12.2 ME1 SeriesIf refrigerant is remaining in the accumulator when the compressor starts, liquid refrigerant is sucked intothe compressor, diluting the refrigerant machine oil and reducing the lubricating performance. To preventthis, the pump-down operation discharges refrigerant from the low pressure side when the unit is not inoperation.Residual operation may be carried out for Max.10 minutes under the following conditions.1.2. When the thermostat is ON during residual operation, residual operation is not carried out if the total of1+2+3 is 10 minutes or more.Outdoor air (R1T) Compressor Electronicexpansion valvePressure equalizingsolenoid valveTimeINV STDR1T < -10°C 86Hz OFF 0~300 pulses ON or OFF 10 min.-10°C ≤ R1T < 0°C 76Hz OFF 0~300 pulses ON or OFF 10 min.R1T ≥ 0°C 60Hz OFF 0~300 pulses ON or OFF 10 min.&Secondary side heat exchanger 4 way valve (Y2R) is ON.Discharge pipe thermistor (R3-1T) on inverter side: 95°C or lowerOROutside air temperature thermistor (R1T) < 0°CWhen compressor continuous operating time is less than 10 minutes and thermostat is OFF, orwhen stop command is received from remote controllerWithin 20 minutes after defrost or oil return operationR5T (oil temperature) ≤ Te+15ThermostatCompressor andoutdoor unit fanMax. 10 min.ONOFFONOFFResidual operation for 10 min.Operation may stop during the 10 minutesresidual operation due to protection discharge,high/low pressure, etc.(VL006)ThermostatMax. 10 min. Max. 10 min.Compressor andoutdoor unit fanResidualoperationResidual operation not carried outif 1 + 2 + 3 is 10 minutes or more.ONOFFONOFF(VL007)ThermostatON1 2 3