BIFFI ICON3000 Service Manual

December 2021
Service Manual
MDE 252 Rev. 1
Troubleshooting
18
Section 2: Troubleshooting
2.2.15 Alarm on Local Display: Request Signal
REQUEST SIGNAL
1. The analogue 4 - 20 mA signal is not within the preset range (from 4 to 20) and the actuator does not
work in accordance to the sent analogue signal.
2. The actuator operates in Local mode and in remote hardwired with Open/Close/Stop commands only.
Verify the values (4 - 20 mA) of the analogue control signal sent to the
actuator at terminals B8-B9 on terminal board.
Connect a 4 - 20 mA signal source to terminals B9-B9. Set the signal source at
4 mA. Check that on local LCD display the value R: xxx% reports the value zero
with a tolerance of +/-0,5%.
Please recalibrate the 4 - 20 mA analogue
input; enter the "restricted menu" with the
service password and set the new value of
the parameters.
Connect a 4 - 20 mA signal source to
terminals B9-B9. Set the signal source at
20 mA. Check that on local LCD display the
value R: xxx% reports the value 100 with a
tolerance of +/-0.5%.
Please recalibrate the 4 - 20 mA analogue
input; enter the "restricted menu" with the
service password and set the new value of
the parameters.
If the problem still exist, replace the
4 - 20 mA board.
If the problem still exist, replace the
4 - 20 mA board.
Are values correct?
Are values correct?
Are values correct?
NO
NO
NO
YES
YES
YES
The issue is not related
to the actuator.
Problem
solved.

BIFFI ICON3000 Specifications

General

Brand	BIFFI
Model	ICON3000
Category	Control Unit
Language	English