If this problem occurs, you can do the following:
- Check the unit is connected to the power supply
- Isolate the unit from the mains power and then turn the unit back on, the unit should beep. If the unit beeps then the unit is connected to the power, if not then the unit is not connected to the power supply or the indoor PCB is faulty.
- If the unit does beep but will not turn on by the remote control then the remote control may be at fault, replace the batteries first and try again. If this fails then the remote control needs replacing.
note: the remote control may look to be working but the unit will not receive the signal if the batteries are low on charge.