Tuttnauer 1730EK, Technical Manual

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64
Corrections
19.1 Replace
DIG-
T2
board.
19.2
Replace the S
S
R (Solid Sta
te Relay) board
located inside the electronic box.
19.3 Replace
ANL
-T2
board.
20.1 Replace
DIG-
T2
board.
20.2
Replace
AC-
T
1 board
or one of the
components Q2 (TRIAC)
or U2 (MOC).
21.1
Install the right software in the control
unit.
21.2
If AC voltage exist the pu
mp is faulty and
shall be replaced. if not, re
placed the AC-T1
board.
21.3
Replace filter
or dry
valve.
Pos
sib
le ca
use ch
eck
-u
p and tes
ts
Generally, this situation is t
he result of a control
failure on DIG-T2 board o
r of the driver
to
the heating elements on A
N
L-T2.
19.1
Check TP4. if
the voltage is
constantly
higher than
4VDC the problem is on DIG-T2
board.
19.2
Voltage at TP4 is close to 0
VDC and despite
this the heating elements a
re activated.
19.3
If all items ch
ecked above conform to
requirements, ANL-T2 board is faulty.
Gene
ra
lly th
is
s
itu
atio
n is c
au
se
d b
y a c
on
tro
l
failure on D
IG-T2 or a
pr
obl
em
at
the heater
s
driver located on
AC
-T
1 board.
20.1
Check the vol
tage at TP5. If it is constantly
higher than
4VDC, the problem is on DIG-
T2 board.
20.2
Check the vol
tage at TP5. If it is 0VDC and
the pump wor
ks the proble
m
is on AC-T1
board
21.1
Check if the installed software is the mo
del
EA version and n
ot model
E.
21.2
If the dry val
ve works despite pump is
not
runnin
g, check AC voltage
between pin 1 at
JP7 on AC-T1 board t
o ne
utral.
21.3
Sometimes, due to overhea
ting of t
he pu
mp
caused by blocking of t
he filter or by t
he dry
valve that is not functioning, the thermal protection of
the pump will
be activated and
stop the pum
p.
Symp
to
m
19.
The heating elements are perman
en
tly
activ
ated.
20.
The air Pump works co
nti
nuous
ly aft
er
30
minutes have
elapsed from
th
e end
o
f the cy
cle (E
A &
EKA only).
21.
Pump does not work (E
A
& EKA only).