WCAIM2045 Positioner/Controller for Series 90 Modular Accessory System 9
Problem Possible Cause(s) Solution
Actuator responding Throttle valve(s) closed or not Adjust throttle valve(s).
slowly or not at all open enough
Actuator opens normally SR-PC solenoid block used on Use proper solenoid block – DA-PC.
but will not close double-acting actuator
(Check markings on block.)
Actuator opens to position DA-PC solenoid block used on Use proper solenoid block – SR-PC.
and then sits there and spring-return actuator
oscillates back and forth (Check markings on block.)
No response from solenoids Air pressure too low Pressure should be 45 PSIG minimum.
Defective pressure switch Replace switch.
Solenoids operate but do Connectors to solenoids reversed Reverse solenoid leads (Refer to section 10.f).
not get correct response
from actuator
Flow Control Division
Worcester Controls
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