Tuttnauer 1730EK, Technical Manual

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63
Corrections
17.1
Replace boar
d DIG-T2.
17.2
Fix the conne
ctions or repl
ace defective
cables.
17.3
Repair or replace the locking mechanism.
18.1

If ac voltage exists – chec
k according
to par. 18.2 a
head.

If ac voltage does not exists – check
according to
par. 18.3 ahead.
18.2
Fix the conne
ctions.
18.3
Replace the S
S
R.
18.4
Replace the h
eating elemen
ts. Locate the
cause of this malfunction and fix t
he uni
t. It
is important to identify
the
cause of the
thermostat malfunction tha
t did n
ot
switch off the heating element.
Pos
sib
le ca
use ch
eck
-u
p and tes
ts
The door is never locked.
17.1
Check TP11 if the voltage
during the process
is higher than 4VDC, the problem is in the DIG-T2 board.
17.2
Check the connection bet
w
een JP5/7 on
board ANL-T2 and the l
ocking solen
oid
.
check if the cable is damag
ed.
17.3
Check the locking solen
oid
input
voltage
without disco
nnecting it.
If the voltage
is less than 2VDC and the
locking
pin is
inside the sol
enoid there is a
mechanic
al problem preventing the plunger
to move freely.
18.1
Check the rated AC voltage (115V or 2
30
V)
at the AC-OUTPUT on AC-T1/ JP4. Verify that AC voltage exists and has the required value.
18.2
Uncover cautiously the
heating elements
connections and measure t
he heating
elements input voltage. If no voltage reaches the heating elements locat
e the interruption
between connector AC-OUTPUT (JP4) and the heating elements.
18.3
If there is no
AC voltage at the outp
ut of
the
SSR the problem is the SS
R.
18.4
The heating elements re
cei
ve the normal
voltage, but
d
o not wor
k.
Symp
to
m
17.
‘Doo
r lo
ck
’ is
always off.
18.
Heati
ng el
em
ents do not
work