Series 65 
ERROR! REFERENCE SOURCE NOT FOUND. 
 
963283EA  Edition 2019-05-03  99/
 
‘Ho’ indicates power up 
          homing is running 
H  o     
 
5.6.2  Operation 
Description / Mode  Digit 1  Digit 2  Digit 3  Digit 4 
Start up (init)   I  n  -  - 
Start up (init)  leak tight 
I  n  -  C 
Valve closed (leak tight
) 
C 
-  - 
C 
Valve open  O       
PRESSURE CONTROL mode
P 
0…100 
= valve position (     0 = minimal conductance 
             100 = max. open) 
 
 
 
POSITION CONTROL mode 
(e.g. A..0 = min. conductance)
A 
Closed / open interlock 
(Valve closed / open  
by digital input) 
I 
HOLD (position frozen) 
activated 
H 
LEARN running 
L 
Safety mode established. 
Refer to «Safety mode» for 
details. 
S 
Power failure  F 
 
 
 
5.6.3  Error 
Description  Digit 1  Digit 2  Digit 3  Digit 4 
Error number (xyz) 
E  x  y  z 
alternately (if error code exist) 
Error code 
-  u  v  w 
 
 
 
 
For Error number / code. Refer to «Trouble shooting» for details 
 
 
5.6.4  Safety mode 
By means of an external switch (see connection diagrams «Electrical connection») the motor power 
supply can be interrupted. In this case the valve enters the ‘safety mode’. This motor interlock prevents 
the valve from moving (e.g. maintenance work). Data reading from the control unit remains possible. 
When motor interlock is active during power up the valve directly enters the ‘safety mode’ and is not able 
to do homing. Display shows ‘S.XXX’ (XXX = value position of valve or C..C for close). In this case 
homing cycle will be done when motor interlock is deactivated. Then Display shows ‘Ho’ (Homing) for a 
moment followed by ‘A.  0’