8 ERROR MESSAGES
38 Planmeca ProX Technical manual
The factory predetermined settings are recalled and the density value is set to zero by
pressing any of the keys during the self test. The error code E.29 appears on the time
display, after which the right-hand preprogrammed setting key must be pressed and held
down for 6 seconds. See section 5 “RECALLING FACTORY PREPROGRAMMED
EXPOSURE VALUES” on page 29.
E.30kV value does not reach or it exceeds the given value
(difference more than 10%)
The tube voltage is sampled periodically (by the tube head CPU) and if the actual
measured kV-value differs more than ± 10% from the specified value this error is
displayed. The tube head, tube head PCB, generator PCB or arm/extension cable signals
HV1, HV2 or KVC (see wiring diagram) can be faulty. See also error E.11 and E.34.
Check the incoming mains voltage during the exposure. Check the arm/extension cable
and the tube head feedback cable. Replace the generator PCB, tube head PCB or tube
head (replace in this order).
E.31X-ray tube anode current (mA) missing, or not in specified
limits
The tube current is sampled periodically (by the tube head CPU) and if the actual
measured mA-value differs more that ± 20% from the specified value this error is
displayed. The tube head, tube head PCB or tube head feedback cable can be faulty.
Proceed with the filament definition, see paragraph 4.3 “X-ray tube filament preheating
voltage calibration” on page 20 for details. If this does not help and the error occurs
constantly check the tube head feedback cable, replace the tube head PCB, or tube head
(in this order).
E.33X-ray tube filament voltage (V) missing, or outside the range
(too low or too high)
The tube filament voltage is sampled periodically (by the tube head CPU) and if the actual
measured filament voltage is not in the specified limits (1.0 - 4.5 V) then this error is
displayed. The filament circuit in the tube head or on the tube head PCB can be faulty.
Check the tube head feedback cable. Replace the tube head PCB or the tube head (in this
order).
E.34X-ray tube anode voltage (kV) missing, or below the specified
limit
This error occurs in the beginning of the exposure, when the tube anode voltage does not
rise. The tube head, tube head PCB, generator PCB or arm/extension cable signals HV1,
HV2 or KVC (see wiring diagram) can be faulty. See also error E.11 and E.30.
Check the incoming mains voltage during the exposure. Check the arm/extension cable
and the tube head feedback cable. Replace the generator PCB, tube head PCB or tube
head (replace in this order).
E.36Too long exposure
The control panel CPU monitors the exposure time by measuring the state of the exp-
signal. If, however, the tube head CPU continues the exposure more than the maximum
exposure time, then the control panel CPU terminates the exposure and this error occurs.
This is a safety procedure, that guarantees that the exposure is terminated under all
conditions.
Replace the tube head PCB if this error occurs repeatedly.
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