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What to do when the controller displays random characters?

The ATS controller may sometimes display random characters. In most cases, the transfer switch operation is not affected and the indicator lights may still show the correct status.

When this happens, a controller reboot by power-cycling is suggested. To power-cycle, the breakers or disconnects from both the Normal and Emergency sides of the ATS must be opened so that the controller completely turns off. For units with backup power like 1PS1 or 1UP, the controller may take a few minutes to turn off completely. For units using auxiliary external power like 1G, 1G1, 1G2, etc., the external power needs to be turned off as well. For ATS units with Bypass/Isolation, the TS can be placed in the ISOLATED position to turn off the controller without having to turn off the power supply -- consult the related manual for detailed instructions.

The main and auxiliary power can then be restored after confirming that the controller has been completely turned off for about 10 seconds.  When off, the display backlight is dim and all the indicator lights are off. If the random characters do not go away after a controller reboot, the controller will need to be replaced.

For assistance, reach out to ASCO Technical Support via hotline 1.800.800.ASCO or email at technicalsupport@ascopower.com.

ASCO Power Technologies USA

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Explore more
Range:
ASCO 7000 SERIES Power Transfer SwitchASCO SERIES 300 Group G Service Entrance Power Transfer...ASCO 7000 SERIES Service Entrance Transfer SwitchASCO 7000 SERIES Bypass-Isolation Power Transfer SwitchASCO 4000 SERIES Electrically Operated Bypass-Isolation...
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