DeDietrich C 330 ECO Installation, User And Service Manual page 68

7. Checking and maintenance
3
SLOW
(+)
X mbar 5
66
1
(+)
P
1
(-)
P
2
2
4
-5.5 mbar....-6,5
T005046-A
Check the air pressure differential switch -
1. Fasten the silicon hose on the + side (P1) of the air pressure
differential switch.
2. Disconnect the silicon hose on the - side (P2) of the air pressure
differential switch.
3. Connect the - side of the air pressure differential switch to one end
of the T piece with a hose.
4. Pull out the syringe until the boiler goes into failure mode Code
l12 / e12 .
5. Make a note of the pressure indicated by the pressure gauge at
that point. A switch pressure of between - 5,5 mbar and - 6,5
mbar is fine. A lower or higher switch pressure indicates a problem
with the air pressure differential switch.
6. Remove any pollution from the connection points of hoses on the
air pressure differential switch.
7. Check the condition and tightness of the hoses of the air pressure
differential switch. Replace the hoses if necessary.
C 330 ECO - C 630 ECO
31/05/2012 - 7600532-01