Anemostat EST - Manual (Page 29)

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1220 Watson Center Road • Carson, CA 90745
Tel: (310) 835-7500 • Fax: (310) 835-0448
www.anemostat.com • [email protected]
Troubleshooting EST Controllers (PWM)
Warning
: These tests are to be performed by qualified personnel who are familiar with the
machinery where the EVO/ECM series control and connected motor is installed. All
mechanical, electrical and other applicable safety practices must be observed when
performing these tests. While the EVO/ECM series controls are low voltage devices, they are
often installed in or near high voltage cabinets and wiring. And they are connected to
electrically isolated connections on the ECM motor. Wiring and device faults can occur.
Always test for high voltage before starting these tests!
High Voltage Fault Test Perform this test in addition to all tests and practices prescribed by the
equipment manufacturer and your professional training.
1. Remove the machine’s control cabinet cover or otherwise obtain
access to the component side of the EVO/ECM series control.
Leave everything connected.
Typical Component Side
2. If you removed power to gain access, re-power the equipment as necessary to
troubleshoot the equipment.
3. Set the multimeter to measure AC Volts.
4. Connect the BLACK lead to electrical earth.
5. Touch the RED lead to the EVO/ECM series connection marked 24Vac. The meter
should read about 30 Volts AC. If the meter reads a voltage above 48 Volts AC,
immediately disconnect the machine. There is a high voltage fault somewhere in the
system.
6. Touch the RED lead to the other connectors to the board. If the meter reads a voltage
above 48 Volts AC, immediately disconnect the machine. There is a high voltage fault
somewhere in the system.
7. Touch the RED lead to the metal wire grippers (top of connector)
for each of the 4 motor wires. If the meter reads a voltage above
48 Volts AC, immediately disconnect the machine. There is a
high voltage fault somewhere in the system.
Motor Control Connection
You are ready to test the EVO/ECM series control.
Control Test Procedure EVO/ECM Series