Daikin - expensive to maintain

I bought a Daikin cassette unit (24kBTU) for the main bedroom, less than a year ago. The unit shows a U4 error, which is a PC board error. Daikin refuse to replace the PCB under warranty and the quote I have received for the parts is R21000 (excl labour)! The aircon cost me R32k less than a year ago, exl installation! So, think twice before installing a DAIKIN!