HF Series Generators
T roubleshooting
TR-1005R4
102
ERROR CODE : E90
DESCRIPTION : Insuf ficient current in common wire running at 10000 RPM.
ERROR TYPE : Indicative. Does not allow exposures.
APPLICABLE TO : All Generators with DRAC or L V-DRAC.
APPEARS WHEN : Running the Anode at High Speed.
INFORMATION / SYMPTOM : E90 is displayed and it is not possible to make Exposures.
POSIBLE CAUSES
Insuf ficient current in common wire is detected.
ACTIONS
1. Check Switches configuration 324SW1 and 3243SW2 in CONTROL DRAC PCB. Refer to T ube
Family Selection in DRAC Documentation.
2. Check Stator T ube Winding impedance (main or auxiliary) according to the X-ray Tube Stator
specifications.
3. Check correct cable connection between Stator and TS2.
4. Check Winding impedance in transformers (main or auxiliary).
5. Turn off Generator, wait 3 minutes and check the PTR1 Module at the CONTROL DRAC PCB
in the following way:
G Connect a Multimeter in Capacitor or Resistor Mode between:
P+ and U,V,W in direct and inverse
N-- and U,V,W in direct and inverse
In case you decide to measure the Gate signals with the Oscilloscope and the
generator Turned On, disconnect cables J2--1 and J2--2 at Control DRAC as these
points are High Voltage with respect to Ground.
G In the same PCB measure PTR1-2 , 3--4, 5--6, 7--8, 9--10, 1 1--12 in direct and inverse . If
any defective connection is found, replace CONTROL DRAC PCB.
Note .
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