Tuttnauer 1730EK, Техническое руководство

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58
Corrections
8.1
Replace f
aulty valve.
8.2
Replace the b
oard.
8.3
Fix the conne
ctions.
8.4
The valve must be fixed or
replaced.
8.5 Replace
ANL
-T2
board
.
9.1
Replace boar
d DIG-T2.
9.2
Fix the conne
ctions.
9.3
Replace the s
olenoid. If this does not help,
repair the me
chanical part of the valve or
replace the va
lve.
Pos
sib
le ca
use ch
eck
-u
p and tes
ts
The pr
ob
le
m ma
y b
e a me
ch
an
ic
al
fa
ilu
re
o
f th
e
val
ve
, t
he
va
lve dr
iv
er located on A
N
L-T2
board or the control ci
rcuit on board DIG
-T2.
8.1
Exhaust valv
e is stuck.
8.2
check tp8. If t
he voltage is
higher than
4V
and
there is control signal to t
he valve, DIG-T2
board is fault
y.
If the vo
ltag
e is 0VDC the valve is o
pen, the
problem is not the control circuit but some other element of the system. 8.3
Check the connection between the connector JP5/4 and the
valve.
8.3
Remove the cover protectin
g the terminals of
the coil and c
heck the voltage when the
solenoid is co
nnected. If th
e valve is open
despite the coil voltage less than 2V, there is a mechanic
al problem.
8.5
If all items ch
ecked above conform to
requirements, ANL-T2 board is faulty.
The problem may be caus
ed by the mechanical
par
t of
th
e va
lve or
th
e
driver located on board
ANL-
T
2 or
th
e c
ontr
ol
cir
cuit
on boa
rd DI
G-
T2.
9.1
Check TP8. I
f the voltage i
s constantly
0VDC, while the valve must be open, th
en
the problem is on the DIG-T2 board.
9.2
Check the connection between connect
or
JP5/4 and the
valve.
9.3
Check the coil input
voltag
e with the
solenoid connected to the valve. If the voltage is hig
her than 10V
DC and the v
alve
does not open, the solenoid or the mecha
nical
part of the valve are faulty.
Symp
to
m
8.
Exhaust valve is alw
ays
open.
9.
Exhaust valve is alw
ays
clos
ed.