EPD/HB/40521/000
ISSUE 5
EPD TECHNICAL HANDBOOK Page 70
5.8 Recovery Procedures
5.8.1 Logging Faults / Extracting Data
All faults other than the communications error described in section 5.6 should be
logged using the standard Form in the Appendices. This form may be used to log
single or multiple faults. The completed form should be copied to the supplier of the
EPD ( Thermo Electron or other supplier / Distributor ).
If the unit is in operational use it is recommended that as much fault and operational
data as possible is extracted from the unit, via the LCD and using EasyEPD2. The
extent that this is possible will depend upon the nature of the fault. Note that for many
faults button/display operation and IR communications are unaffected. This includes
many Fxxx codes displayed on the LCD. Data should be extracted and logged as
follows:
1. Display fault code or indication ( Fxxx, ---- ).
2. Internal faults logged in the EPD Status Faults record.
3. Contents of internal Event History store.
4. Dose and peak dose-rate/time data ( if a spurious dose fault is suspected ).
5. Dose profile data ( if a spurious dose fault is suspected ).
Where possible the data should be obtained as screen dumps from EasyEPD2 and
attached to the completed Fault Log Form ( Appendix D ).
If a faulty unit is to be returned to Thermo Electron it must be returned in a fully
decontaminated and reasonably clean condition. The battery must be removed but
kept with the unit. The date of installation of the battery should be marked on the
battery.
5.8.2 Clearing faults
The steps required to clear a fault are as follows:
1. Extract data and fault information and complete a Fault Log Form,
Appendix D.
2. Identify the fault type in Tables 5.1 or 5.2 and take the recommended
action. This will range from resetting the unit (removing, then replacing
the battery), to returning the unit to the supplier ( Thermo Electron or
other Supplier or Distributor ).
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