TR440
12310-0702-04
Seite
22 / 24
www.ziehl.de
The device cannot be programmed (configured)
Cause
Code block
Remedy
The code block provides protection against unauthorised manipulation on the device.
When the code block is active, the parameters cannot be change. The pin can be set
by the user.
Pin code unknown? -> perform a code reset:
While switching on the control voltage, keep the "Set" key pressed
for
2 s
The display changes
8
888
8
–
8
Cod
8
–
8
off
8
–
8
888
8
Release the Set key
Code block is switched off, Pin code is 504
Displayed temperature does not match the sensor temperature
Cause
PT 100 sensor is incorrectly connected
False sensor settings
False measurand (°C / °F)
Remedy
Check the Pt 100 sensor connection (see connection diagram)
Check the sensor settings (3-wire or 2-wire with specification of the line resistance
–> Resistance of outgoing and return line)
Set the correct measurand (see Programs point)
Temperature repeatedly darkens briefly
Cause
The device is in the simulation mode
Remedy
Exit the simulation mode, see Point [8.16 Sensor Simulation]
11.1 Display of program number, measurand and software version
Keep the Set key pressed:
After 5s: Displays the program number
After 8s: Displays the measurand
After 10s: Displays the software version
