7.0 Troubleshooting
The actuator is not intended to be serviced or repaired by the customer. Do not take the actuator
apart. Return any actuator in need of service or repair to Armstrong’s authorized service representative.
Problem Possible Cause(s) Corrective Action
Actuator does not respond to current
loop reference
Actuator is in LOCAL set mode and
REMOTE LED is OFF
Change Actuator to REMOTE mode
(Hold Mode and press Set)
Actuator does not function even
though power is attached
1. Power push button is set to o
2. Fuse is missing or blown
1. Press and hold power button for
2 seconds to turn unit on
2. Replace fuse
Actuator does not control
temperature to the desired set point
1. Actuator is set to Positioner mode
not Temperature Controller mode
(LED 2 only is lit)
1. Change to Temperature
Controller mode
(Hold Mode and press Down (-))
While controlling temperature,
actuator moves excessively or
oscillates
1. Controller gains are set too high
for the current water supply
conditions
1a. Decrease and P and D gain until
control is stable
1b. Improve water supply pressures
to increase outlet flow above
nominal minimum controllable
flo
Actuator will not control temperature,
displays ‘E2’
1. Temperature probe is not plugged
into actuator
2. Temperature probe is damaged
1. Ensure probe is securely
plugged into actuator
2. Replace temperature probe
Armstrong
International
221
Armstrong Blvd., Three Rivers, Michigan, 49093 - USA
Phone (269) 279-3602 Toll Free (888) HOT-HOSE (468-4673)
Designs, materials, weights and performance ratings are
approximate and subject to change without notice. Visit
armstrong
international.com/emech for up-to-date information.
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