Detailed Error Message Explanations - Planmeca ProX Technical Manual

8.2 Detailed error message explanations

E.00 Exposure key was released too early during exposure
The most probable cause (if the key really was pressed firmly during the whole exposure)
is faulty control panel or faulty separate exposure switch.
Replace the control panel or the separate exposure switch. Check the control panel cable,
telephone cable and the arm cable.
E.10X-ray tube anode voltage (kV) overshoot
This condition is monitored by the watch-dog circuit on the tube head PCB during the
whole exposure and if the anode voltage rises above 95 kV the exposure is immediately
aborted and this error indicated. A knocking sound may be heard from the tube head at the
same time. This kind of arcing can occur now and then without any special reason, and
should be considered a normal phenomenon. If however the occurrence frequency
becomes too high, it could be an indication of a degrading tube head.
If this error occurs constantly it is probably caused by a faulty tube head or tube head PCB
or generator PCB (replace in this order). The possible reason is also faulty feedback cable
(9 pole) in the tube head.
E.11X-ray tube anode voltage (kV) dropped suddenly
The x-ray tube voltage suddenly drops, and a knocking sound is heard from the tube head
at the same time. The exposure is aborted and this error indicated. This phenomenon
should be considered quite normal if it doesn't occur frequently. If the generator is
damaged during the exposure, or the arm/extension cable is broken, this error is indicated
and during next exposure the error E.30 occurs.
If this error occurs constantly it is probably caused by a faulty tube head or tube head PCB
or generator PCB (replace in this order). The possible reason is also faulty feedback cable
in the tube head.
E.12X-ray tube cathode filament preheating voltages are not
calibrated
The tube head PCB has been replaced, but the X-ray tube cathode filament preheating
voltages are not calibrated.
See paragraph 4.3 "X-ray tube filament preheating voltage calibration" on page 20 for
details how to perform the calibration.
E.13Filament preheating voltage calibration failed
During preheat calibration the filament voltage is measured to be in specified limits. The
filament circuit in the tube head or in the tube head PCB is faulty or the tube head is faulty.
Perform the calibration procedure again. If it fails, replace the tube head or tube head PCB
(in this order). The possible reason is also faulty feedback cable in the tube head.
E.29Control panel key short-circuited/pressed during the self test
This error can occur only during the self-test. During the self test the unit checks that all
keys are open (normal state if not pressed). If a key is found to be in short circuit, this error
is displayed. Because the control panel keys are arranged in a matrix, one key's short
could cause the whole keyboard to operate erroneously, therefore this check is important.
Replace the control panel.
Technical manual
8 ERROR MESSAGES
Planmeca ProX 37