CRANEX
®
Novus e 4. Troubleshooting
Service manual 61
4. Troubleshooting
4.1 Initial checks
Restarting the unit
If the unit fails to operate, does not operate correctly or
if an error code appears, switch the unit off, wait for a
few seconds and then switch the unit on again. If the
unit still does not operate correctly or the error message
reappears, follow the troubleshooting procedures de-
scribed here to correct the problem.
If there is a problem with image transfer, close and reo-
pen the dental imaging software and/or restart the PC.
Error Codes
If the unit malfunctions or if it is used incorrectly an error
code will appear on the main control panel.
There are two categories of error code:
- H, user errors, and
- E, system errors.
When an error code appears on the display the unit will
stop working. The unit cannot be operated while the er-
ror code is on the display.
To clear an error code from the display, correct the error
and then press any key on the main control panel (NOT
the side control panel).
NOTE:
Error E18, display failure can only be seen on the serv-
ice assistant.
Checking circuit boards
Circuit boards cannot be repaired in the fi eld. On some
boards some fuses can be replaced. But, if a board is
faulty, replace it.
On most of the circuit boards there are indicator LEDs,
that allow the operation of the board to be monitored,
and test pins (TP), that allow the operation of the board
to be checked. LED and test pin descriptions for each
circuit board are in the section 3 Circuit Boards.
Use a digital multimeter (DMM) when checking boards.
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