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The pressure has dropped on our Vaillant ecoTEC PLUS 630 to

Customer Question
0.2 bar and the system...
The pressure has dropped on our Vaillant ecoTEC PLUS 630 to 0.2 bar and the system has cut off. There is an error message F.22. What can we do to restart it? Quite urgent as it's freezing cold outside.
Submitted: 5 years ago.Category: HVAC
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Answered in 17 minutes by:
1/29/2012
HVAC Technician: Andrew Smith, HVAC Technician replied 5 years ago
Andrew Smith
Andrew Smith, HVAC Technician
Category: HVAC
Satisfied Customers: 3,706
Experience: City & Guilds Plumbing and Heating Engineer
Verified
Hi my name is XXXXX XXXXX I will try and sort your problem in the shortest possible time. Do you have a silver flexible pipe under the boiler?
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Customer reply replied 5 years ago
Yes there is a silver flex pipe there
HVAC Technician: Andrew Smith, HVAC Technician replied 5 years ago
If you turn on the valve on one end on fully, then crack the other one open - you will get a whistling noise and the pressure should rise slowly. Turn it off again when you get to 1.5bar. Job done.
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Customer reply replied 5 years ago
Both valves are tight. I've undone one end and some water dribbled out but no whistling noise. Am I doing something wrong? The pressure remains the same. 0.2 bar.
HVAC Technician: Andrew Smith, HVAC Technician replied 5 years ago
Don't undo it, turn the valve on that is at each end. Some have a black lever, others require a screwdriver in a slot and turning.
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Customer reply replied 5 years ago
I've turned one end with a screw head and the pressure's shot up into the red but water is spurting out of it. Help!
HVAC Technician: Andrew Smith, HVAC Technician replied 5 years ago
Turn it back off again so that the whistling stops and the water stops going in. If you bleed a radiator into a bowl you can bring the pressure back down to 1.5 bar.
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Customer reply replied 5 years ago
Managed to get rid of the spurting water and bled a radiator so that the pressure's dropped. All appears to be working but slightly concerned! With the screwhead on either end of the silver pipe, which way am I meant to be turning it to make it go on or off? For future reference.
Customer reply replied 5 years ago
And pressure keeps rising after I've bled the radiator - any ideas?
HVAC Technician: Andrew Smith, HVAC Technician replied 5 years ago
If you turn the screw head until it is faced directly across the pipe then the valve will be off and it will stop filling. you should hear the whistling stop when in the correct position. Keep venting into a plastic tub until the pressure is 1.5 bar.
Andrew Smith
Andrew Smith, HVAC Technician
Category: HVAC
Satisfied Customers: 3,706
Experience: City & Guilds Plumbing and Heating Engineer
Verified
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