Daikin FDMRN20AV1K Installation Manual

18OPERATING RANGEOVERALL CHECKINGOutdoorDB (°C)54521914 19 23Indoor WB (°C)DB = Dry Bulb WB = Wet BulbEnsure the following, in particular:-1) The unit is mounted solidly and rigid in position.2) Piping and connections are leak proof after charging.3) Proper wiring has been done.Drainage check:- Pour some water into left side of drain pan(drainage are in right side of unit).Test run:1) Conduct a test run after water drainage test and gas leakagetest.•2) Watch out for the following:-a) Is the electric plug firmly inserted into the socket?b) Is there any abnormal sound from unit?c) Is there smooth drainage of water?Check that:Condenser fan is running, with warm air blowing off thecondensing unit.Evaporator blower is running and discharge cool air.The remote controller incorporates a 3 minute delay in thecircuit. Thus, it requires about 3 minutes before the outdoorcondensing unit can start up.•1.2.3.COOLINGPHASE SEQUENTIAL (3PH)The unit with Scroll Compressor can only rotate in one direction. For this reason, a protective device (phase sequential) is fittedto prevent incorrect wiring of the electrical phases. When the three phases are not connected correctly, the phase sequentialoperates, and the unit will not start. This device is located in the control box of the outdoor unit.The following table shows the LED indicator light for phase sequential under normal operation and fault conditions.LEDDescriptionPW(Red)P_S(Yellow)P_T(Yellow) ActionsNormal operation -Reverse phase Switch off the unit. Check the 3 phase wiring.T phase missing Switch off the unit. Check the 3 phase wiring.S phase missing Switch off the unit. Check the 3 phase wiring.R phase missing Switch off the unit. Check the 3 phase wiring.Overheat High discharge temperature. Check the refrigerant system.High Pressure High discharge pressure. Check the refrigerant system.Low Pressure Low suction pressure. Check the refrigerant system.Sensor missing Switch off the unit. Plug in sensor.ON OFF Fast BlinkOutdoorDB (°C)52501914 19 23Indoor WB (°C)**Applicable only for RR20AV1KRE,RR25AV1KRE, RR30AV1KRE, RR50A and RR60A