EVO 150 Controller
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Appendix 6 / Faults
The EVO 150 contains several internal diagnostic routines that verify correct operation and
identify specific problems if they occur. Any problem with the system will turn off the No Fault
output, on the optional PLC I/O board, as well as, make the front panel switchpad LED’s and the
on board LED simultaneously blink.
Actuator is malfunctioning. The actuator is not responding to
commands from the controller. The most likely causes are:
• Parameter 2 is set to the wrong value. Refer to page 21 for more
information about setting controller parameters.
• The actuator cable is disconnected or has loose wiring screw-terminals
or is mis-wired.
• The actuator end-of-travel potentiometer or limit switches have failed.
• The actuator is mechanically jammed.
Note: To clear the fault, press the S1 button on the EVO 150 controller board. If this does not
work, turn the DC power off, wait until the switchpad LEDs turn off, then turn the DC power on. If
the Fault persists, contact AccuWeb for assistance. Refer to page 21 for servicing information.
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