Armstrong International
221 Armstrong Blvd, Three Rivers, MI 49093 - U.S.A.
Tel: (269) 279-3602 Fax: (269) 279-3130
Designs, materials, weights, and performance ratings are
approximate and are subject to change without notice.
Visit armstronginternational.com for the most updated information.
Page 31 of 36
Check
YES
YES
No communication using Modbus
Enter the Settings Menu (Section 5.0) and change the Control
Source to Modbus.
Connect signal wiring to the correct terminals. See Section 3.0
in this IOM.
Is the actuator set to receive a Modbus
setpoint? (Indicated by ‘MOD’ on display)
Is the loop signal wiring connected to the
correct terminals on the actuator terminal
block and with the correct polarity?
NO
NO
Are the baud rate and Device ID correct?
NO
Enter the Settings Menu (Section 5.0) and in Modbus, change
the baud rate and Device ID to the correct values.
Check
Actuator displays E2 when set to Temperature Mode
Enter the Settings Menu (Section 5.0) and change the Control
Source to Modbus.
Ensure the internal probe wiring is securely plugged into the
NTC1 port.
Is the temperature probe properly connected
to the actuator plug?
Is the probe connected to the internal NTC1
connection?
NO
NO
Replace the temperature probe. Is the error
still there?
NO
Original temperature probe was damaged.
YES
Indicates serious problem. Obtain model and
serial numbers of the actuator and valve.
Contact local Armstrong sales representative.
YES
YES
6.0 - Troubleshooting Guide, cont.
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