ELTRA ONH-2000 - 1.2 No Gas Flow

 2002 by ELTRA GmbH Germany – January 2002 – Service Manual OH 900 / ON 900 / ONH 2000
1.2-1
1.2 1.2 No gas flow
C h e c k th e p re s s u re
S e e 4 .2
s
w
it c h . S e e 2 . 2
C h e c k t h e m a in s p o
w
e r.
h ig h e r o r l o
w
e r
?
of the p um p vo lta g e
th e re a d in g
Is
O n th e b o a rd F C 2 1 .
z e ro
o k o r
?
Is t h e
v o lta g e
1 2 V D C
?
th e v o lta g e
Is
R e p la c e th e
flo
w
s e n s o r
R e p la c e th e
b o a rd F C 2 1
A d
j
u s t F C 2 1
S e e 2 .1
R e p la c e th e
b o a rd N R 3 2
A d
j
u s t N R 3 2
S e e 2 .1
Zero
L o
w
e r H ig h e r
High er
o .k .
Y e s
o .k .
ab ou t 1 2 V D C on T P 4
M e a s u r e a t l e a s t
2 0 V D C o n T P 5 ,
?
w
h e n n o flo
w
th a n 0 .6 V D C
on TP 1 muc h h ig her
o n T P 2 z e ro
o r
Zero
A d
j
u s t th e flo
w
s e e 2 .1
N o
?
ad
j
ustab le
fl o
w
Is th e
12VDC
th a n 1 0 0
V oltage s
C h a n g e th e c h e m ic a ls .
T h e g a s f lo
w
is b lo c ke d .
S e e 1 . 2
T h e p u m p is
w
o r n o u t.
0.6 VDC
1 - 6 -E
M e a s u re t h e p u m p v o lt a g e b e t
w
e e n
T P 1 a n d T P 2 ( G N D ) o f th e b o a rd N R 3 2 ,
s e e 2 .1
C h e c k th e o xy g e n p r e s s u r e o n t h e
fr o n t p a n e l g a n g e to b e 1 ,5 b a r ( 2 2 p s i)
N o g a s fl o
w
o n t h e u p p e r flo
w
m e te r