Vaillant TURBOmax Plus SERIES User Manual

81
FAULT FINDING
Does fan run after approx. 30 secs.?
Check flue and ignition system
No
Check diagnostic code D.24
(see page 53) equal 1?
Check pitot tube (in fan outlet) and air
hoses are not obstructed and correctly
aligned.
Check or replace air pressure switch.
Does the fan run now?
Is 230 VAC present across fan
terminals?
Replace electronic board
Yes
No No
Yes
No
Yes
Yes Check/replace fan
Does the boiler
commence ignition
Check status code
(see page 52) is S.33?
Check air/flue gas system
is correctly fitted and not
obstructed
Yes
No
Replace electronic board
No
Yes
Are electrodes sparking at
the burner?
Yes Go to sheet E
No
Check electrodes and
electrode leads.
Replace as necessary.
Sheet D

Vaillant TURBOmax Plus SERIES Specifications

General

Category	Boiler
Modulation	Yes
Model	TURBOmax Plus SERIES
Fuel type	Natural gas
Mounting	Wall-mounted
Heating Circuit	Single
Output	24kW, 28kW
Warranty	2 years (extendable)