Won't Power Up; Receiving Error Message(S); Database History Isn't Available Or Is Lost; Clock Doesn't Work - Danfoss AK-SC255 Troubleshooting Manual

AK-SC255

Won't Power up

Receiving error message(s)

Database History isn't available or
is lost

Clock doesn't work

EDF Message

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