Marwin Valve ER Series Electric Actuators - Manual (Page 5)

under this warranty, the purchaser must first obtain a
return authorization number from RI. Products must be
returned to RI freight prepaid for evaluation. If the unit
failed due to poor workmanship or materials the unit will
be repaired or replaced. The unit will be returned ground
freight paid by RI, if air shipment is requested the pur-
chaser shall pay the difference. This warranty is in lieu of
all other obligations, liabilities or expressed warranties.
Any implied warranties, including any implied warranty
of merchantability are hereby expressly excluded. In no
event shall RI be liable for special, incidental or conse-
quential damages arising in connection with the use of
its products, or for any delay in the performance of this
warranty due to causes beyond its control.
Troubleshooting
Actuator does not respond to control signal.
Power not on. Turn on power. 
Actuator wiring wrong. Check wiring diagram and 
rewire.
Wrong voltage. Check power supply and make ap-

propriate change.
Thermal overload activated. Allow motor to cool,

actuator will automatically reset.
Actuator and valve in opposite positions when ac-

tuator was mounted. Remove actuator, rotate 90°
and remount.
Actuator will not open or close completely.
Travel limits set wrong. Reset cams. 
Valve torque too high for actuator. Install correct 
size actuator.
Mechanical stops not removed. Remove stops.

CAUTION: Do not remove any part required for
proper operation.
Valve oscillates.
Valve torque too high for actuator. Install correct 
size actuator.
Actuator without brake installed on butterfly valve.

Install brake.
Motor brake out of adjustment. Adjust brake.

Set screw loose in brake disc. Adjust brake and 
tighten set screw.
Motor runs but output shaft does not rotate.
Gear damage or sheared pin. Contact Factory or 
nearest distributor.
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