TEL AFA4000/E, Installation And Operating Manual

Page: 189 / 210

AFA4000/E VAV Airflow Controller / p.189
13. Troubleshooting
13.1 Fault finding
13.1.1 AFA4000/E
Problem Check for
Screen blank
•
Check the power supply is securely plugged into the monitor.
•
Check the power supply is securely plugged into the mains
power socket.
•
Check that there is 15 Vdc power supply on the monitor
terminals. If not, a wire could be broken or a cable sheath
caught.
Sensor Error message
•
Check the sensor cable is securely plugged into the sensor.
•
Check the sensor cable is securely plugged into the monitor.
•
Replace the sensor.
•
When the Sensor Error message is still displayed, replace the
sensor cable.
•
When the Sensor Error message is still displayed, replace the
monitor.
Audible alarm not
working
•
Check for screen messages. When SETBACK is displayed the
monitor has been remotely muted.
•
Check to see if the alarm has been disabled in the Cal config
menu (section 8.1.1.1).
Damper actuator not
moving
•
Check the Run screen to confirm that the displayed status is
Automatic and not Manual.
•
Set the output to Manual and manually drive the actuator
output. If the actuator does not move, check the wiring and
make sure the actuator is not manually overridden.
RS485 Comms not
connected
•
See Diagnostics menu , Comms Data (section 13.2).
•
Check the correct Protocol, Slave ID, Baud Rate and Parity have
been set.
•
Tx & Rx = 0. The AFA4000 is not connected to the network.