Anemostat EST - Manual (Page 31)

31
1220 Watson Center Road • Carson, CA 90745
Tel: (310) 835-7500 • Fax: (310) 835-0448
www.anemostat.com • [email protected]
Troubleshooting EST Controllers (PWM) - continued
EVO/ECM Series Control Test Procedure
Motor On Test The EVO/ECM series control must be set to ON to perform this tes t.
Set the multimeter to read 24Vdc.
1. Touch the black lead to the common (Green) wire on
the 4 pin motor connector.
2. Touch the red lead to the Motor On/Off (White) wire
on the 4 pin motor connector.
3. If the Dc voltage is ~22Vdc, the motor should run.
4. If the motor does not run, the cable may be defective.
5. Go to the control connector on the motor.
6. Insert the black meter lead into the connector shell hole
containing the single green wire.
7. Insert the red meter lead into the connector shell hole
containing the White wire. The DC voltage should be ~22Vdc.
If it is not, the control cable is defective. If the voltage is greater
than 10Vdc and the motor does not run, contact the equipment
manufacturer for further instructions.
8. If the EVO/ECM series control includes an off feature, turn the control to off. The motor
should stop and the voltage between the green and black wires should fall to less than
0.2Vdc.
Automation Off Test If an automation system turns the ECM motor on/Off by directly feeding 24Vac to
the EVO/ECM series controller, perform the Off Test.
Turn the ECM motor off using the Automation System.
1. Touch the black lead to the common (Green) wire on the 4 pin motor connector.
2. Touch the red lead to the Tachometer (Black) wire on the 4 pin motor connector.
3. The Dc voltage should be less than 3Vdc
4. If the voltage is too high, the Automation Control is leaking current through its On/Off
switching device.