Kb: RTX-AL4 Board

Mon, 01 Jan 0001 00:00:00 +0000

Very often, when a Rotex/Daikin HPSU fails with error codes E200 or E8100, the two 100uF capacitors on the little driver board are to blame.

The fact that those are rated 85°C only, and sit close to heated parts inside the HPSU, are not really helpful for their lifespan.

These instructions are provided “AS IS” and without any warranty of any kind.

RTX-AL4 Board with original (defective) capacitors. (front & back)

The defective capacitors, made by NOVER: 100µF, 63V, 85°C

Both are expected to have a capacity of 100µF each, but only 4µF remain. This is insufficient to provide the power required.

I prefer capacitors from Nichicon or Panasonic, both are rated for 105°C instead of 85°C.

Before installing the board back into its place, make sure that the caps did not get damaged by soldering.

j3w5.de – Daikin (Rotex)