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 28 of 36
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6.0 - Troubleshooting Guide
The actuator is not intended to be serviced or repaired by the customer. Do not take actuator apart.
Return any actuator in need of service or repair to Armstrong’s authorized service representative.
Problem Possible Cause(s) Corrective Action(s)
Actuator does not function and the display
remains off even though power is attached
Fuse is missing or blown Replace fuse
Actuator does not function even though
power is attached
Manual Override Handle might be engaged
Release Manual Override Handle, ensure it
is fully seated
Actuator does not respond to current loop
reference, may display ‘E4: Analog signal’
Actuator is not set to ANALOG Change Actuator to ANALOG MODE
Calibration is correct Recalibrate or set to factory
Actuator does not control temperature to
the desired set point
Actuator is not set to Temperature Control-
ler mode
Change to Temperature Controller mode
While controlling temperature, actuator
moves excessively or oscillates
Controller gains are set too high for the
current water supply conditions
Decrease gains multiplier until control is
stable
Improve water supply pressures to in-
crease outlet flow above nominal minimum
controllable flow
Actuator will not control temperature,
displays ‘E2: Temp Sensor’
Temperature probe is not plugged into
actuator
Ensure probe is securely plugged into
actuator
Temperature probe is damaged Replace temperature probe
Actuator will not control, displays ‘Override
Handle’
Manual Override Handle might be engaged Release Manual Override Handle
Actuator will not control temperature,
displays ‘E3: Voltage’
Power supply is insufficient or wire gauge
is too small
Follow our guide for power supply capacity,
wire gauge and distance.
Actuator will not function, displays 'E1:
Critical Error'
Actuator critical error
Restart actuator
Consult factory
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