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ETAsys.com
Specifications are subject to change without notice.
1601 Jack McKay Blvd. • Ennis, Texas 75119 U.S.A.
Telephone: 800-321-6699 • Fax: 800-996-3821
TROUBLESHOOTING THE ECM MODULE WITH AN ETA-ECS3
Note: All troubleshooting should be done by a certified electrician.
Issue 1: Incoming AC LED on the ECM is not illuminated.
Possible Cause #1:
Incoming AC Mains circuit breaker has tripped due to excessive load.
Action Needed:
Check the AC outlet that the ETA-20SH is plugged into for 120V AC voltage. If no voltage is present, check to
see if the AC outlet is on a GFI and check to see if it was tripped. If it has not been tripped trace the AC Mains
outlet back to the electrical panel and check the AC Mains breaker to see if it is tripped.
Possible Cause #2:
AC Mains power is ok (120V), internal 20A (ETA-ECM20, ETA-ECM20M, ETA-20SH) Slow Blow fuse is blown.
Action Needed:
Open ECM unit and replace the fuse with a Slow Blow type.
Issue 2: AC Fault LED is Flashing on the ECM.
Possible Cause:
Although the Clamping Suppression circuit virtually assures protection from most transient voltage spikes and
surges, nature has a way of occasionally creating electrical forces that are beyond the capabilities of any device
to absorb without some degree of damage. In the rare instance that this occurs, the clamping circuit can be
damaged during the suppression.
Action Needed:
The unit will need to be repaired or replaced. It is important to have all equipment that was connected to that
AC Mains Line inspected for proper operation. Note: The unit will still operate but no AC Spike or Suppression
protection will be available.
Issue 3: Unit is set to External Trigger, the incoming AC LED is illuminated but the Active LED is not illuminated.
Possible Cause #1
External DCV from the ETA-ECS3 is not connected across the “+” and “G” terminals.
Possible Cause #2
External DCV voltage polarity is not correct across the “+” and “G” terminals.
Possible Cause #3
External DCV voltage is too low to activate the trigger circuit. Must be a minimum of 5VDC to activate the
ECM module. Possible short in the wiring system.
Issue 4: ECM Active LED is not illuminated, incoming LED is illuminated but the Abnormal LED on the ETA-ECS3 is flashing.
Possible Cause
The AC Mains Voltage exceeded 127VAC or the voltage dropped below 107VAC activating the “EVS”
shutdown.
Action Needed
The ETA-ECS3 must be re-sequenced to turn off the LED, measure the AC mains before turning On. If the
voltage is between 117VAC and 123VAC you may proceed to reset the ETA-ECS3 by restarting the start up
sequence. Note: It is important to have all equipment that was connected to the module be inspected for
proper operation. If the problem persists, contact your local power company for the cause of unstable AC line
conditions.
ETA-20SH
AC Power Conditioning & Suppression Module
