2015 Elddis Avante Whale Air Blower Heater.

[Rotaruaben]

Hi all, I am trying to find an instruction on how to remove the Whale air heater on my van. The PCB is faulty and I need of replacement. A recent visit from a fitter left him baffled as to how the PCB was accessed. He was unable to work out how to separate the unit from the bottom of the caravan. Has anyone any information that may be of help?