Daikin Heat Pump Outdoor Unit RXS09LVJU

Warning: Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work.

Removed the 2 nuts of the compressor?

Warning: Be careful not to get yourself burnt with pipes and other parts that are heated by the gas brazing machine.

Warning: If the refrigerant gas leaks during work, ventilate the room. (If the refrigerant gas is exposed to flames, toxic gas may be generated.)

Warning: Since it may happen that the refrigerant oil in the compressor catches fire, prepare wet cloth so as to extinguish fire immediately.

Caution: From the viewpoint of global environment protection, do not discharge the refrigerant gas in the atmosphere. Make sure to collect all the refrigerant gas.

Restored the piping by nonoxidation brazing?

Prevented the carbonization of the oil inside the four-way valve and the deterioration of the gaskets affected by heat? (Keep below 120°C (248°F).)

Measure the power supply waveform between No. 1 and No. 2 on the terminal board

Check to see if the power supply waveform is a sine wave

Check to see if there is waveform disturbance near the zero cross

Sign off on the power supply waveforms check

Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work.

Take care not to cut your finger by the fins of the outdoor heat exchanger.

1 Remove the screw of to fit the 5 hooks. the stop valve cover.

Pull the stop valve cover downward and remove it.

2 Remove the 3 screws and lift the top panel.

Warning: This procedure requires trained personnel with PPE!

Install the inverter checker instead of a compressor

Voltage of the built-in smoothing electrolytic capacitor dropped to 10 VDC or below

Terminals removed from the compressor

Terminals connected to the terminals of the inverter checker

Warning: Do not let the terminals (U,V,W) touch each other. High voltage is applied

Power transistor test operation activated from the outdoor unit

Diagnose according to 6 LEDs lighting status

1. When the timer cancel button is held down for 5 seconds, 00 is displayed on the temperature display screen.

2. Press the timer cancel button repeatedly until a long beep sounds.

The code indication changes in the sequence shown below.

Note: 1. A short beep or two consecutive beeps indicate non-corresponding codes.

2. To return to the normal mode, hold the timer cancel button down for 5 seconds. When the remote controller is left untouched for 60 seconds, it also returns to the normal mode.

3. Not all the error codes are displayed. When you cannot find the error code, try the check method 2. (Refer to page 92.)

Check Method 2 1. Press the 3 buttons (TEMP, TEMP, MODE) at the same time to enter the diagnosis mode.