AK-SC255
Troubleshooting Guide
6
USCO.EI.RF0.D1.22 / 521U0152
©Danfoss (USCO / MKS), 04- 2010
For Danfoss Technical Support call +1-410-931-8716.
Won’t Power up
Check for incoming power at MK1 connector.
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Check fuse at F1 (Fig. 6).
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Check for input power at the base of the power supply.
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Check for 5vdc between MH5 and MH6 on the 255PROGBD (the yellow 5v in
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LED and the green 5v out should be lit.
Receiving error message(s)
Contact Danfoss Technical Support to resolve source and resolution of your
•
particular error messages.
Database History isn’t available or
is lost
Insure that the battery jumper at JP5 on the base board (Fig. 7) is set on the
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right two pins (this is the enabled position).
Check to see that there is a valid database with history configured.
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Check to see that history status is Collecting and not Suspended
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See if you can access history retrieval via the keypad via the AKA65
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If you can still not access history contact Danfoss Technical Support for further
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options.
Clock doesn’t work
Insure that the battery jumper at JP5 on the base board (see Fig. 7) is set on
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the right two pins (this is the enabled position).
Now try resetting the correct date and time. Observe this new time for several
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minutes.
If, after several minutes, the clock appears to be correct you have most likely
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corrected the perceived problem.
If, after a short time, the date returns to 01/31/95 and the clock to 00:00:00…
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call Danfoss Technical Support for further assistance.
EDF Message
The most common EDF message is one saying “Could not Load…,” this usually
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implies that the necessary EDF was not in the correct directory or folder. Make
sure the EDF mentioned in the error message is in your list of EDF’s.
Remember, after loading EDF’s or a Device List you must reset the AK-SC255.
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If your problem is still not resolved, call Danfoss Technical Support for
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assistance..
Figure 7
1.0 Amp 250V
fuse on the “hot leg”
of input power
Figure 6