Vaillant aquaPLUS VUI 362-7 Service Manual download pdf (Page 47)

Fault finding 10

Instructions for installation and servicing aquaPLUS VUI 362-7 47

Does flame indicator glow and

flames increase in size to full gas

rate after approx. 2 mins?

Yes

Does burner flame modulate/ go

out when radiator temperature

control is turned left to the

horizontal position at flow

temperature of approx. °50 C?

Yes

Does heating flow pipe

temperature rise?

Go to sheet GYes

Check operation of burner and modulation

Ensure flow and return service

valves are open

Replace electronic board

Check operation of boiler in DHW

mode, does flame increase in size

to full rate?

Yes

Check partial load

setting

Check diagnostic code D.22

(see page 39) equals 1

Go to sheet G

Yes

Check connections and

modulator, replace gas valve if

burner still fails to increase to full

rate

Turn main ON/OFF control to

the "0" position

Yes

Insert a small screwdriver

through the hole in the front of

the diverter valve and hold

blade lightly against spindle

Turn "ON" the main ON/OFF

control

Does spindle move?

Yes

Replace electronic board

Replace diverter valve

Sheet F

834702_33GB_012005.qxd 09.03.2005 16:26 Uhr Seite 47

1 2 ... 42 43 44 45 46 47 48 49 50 51 52 ... 59 60

Comments to this Manuals

No comments

Vaillant aquaPLUS VUI 362-7 Service Manual Page 47

Comments to this Manuals

Related products and manuals for Water heaters & boilers Vaillant aquaPLUS VUI 362-7