Well the answer for that error code has this for an answer,
Please get in touch with us
We will be able to run some further checks to get your TV service back up and running again.
Doesn't really help much does it.
Assuming you are trying to watch directly from the main box, not on a mini, is it all recordings, can you pause live TV and then continue watching and rewind live TV as this also uses the hard drive and simulates a recording. I assume when you spoke to faults they had you do a factory reset, if not you could try doing a factory reset just select the keep your recordings option.