Technical Problem Resolution: Dialogue between a Customer and an Advisor

Client:
Good evening

Technical Advisor:
Good evening

Client:
I have a phpro+ regulator on which a fault appears 5 seconds after startup. Can you help me?

Technical Advisor:
Maybe. Is the regulator from MEL FRANCE?

Client:
Yes, actually the display shows r2.0 and then after about 5 seconds it shows dEF.

Technical Advisor:
Try unplugging the probe and restarting your regulator.

Client:
I tried but nothing changes. I can't control the buttons. I pressed both arrow keys simultaneously as instructed in the manual to clear the fault, but nothing happens.

Technical Advisor:
Unfortunately, I don't have access to the documentation tonight.

Client:
Still the same thing, r2.0 then dEF. Can I contact you on Monday?

Technical Advisor:
Yes, of course. Feel free to contact us! Have a good evening.

Client:
Thank you. Do you have a phone number?

Technical Advisor:
Yes, it's 0680012753.