Hardware Diagnostics - Respironics ESPRIT Service Manual

Chapter 5
Repair

Hardware Diagnostics

5-10
3. Repeat: If the same code occurs consecutively, the repeat column is
incremented (rather than displaying the code again). For example, if
code 1002 occurs three consecutive times, it is logged as code 1002
with ì2î in the repeat column. The repeat column increments (up to a
maximum of 255) until a different code occurs.
4. Time: Diagnostic codes are time-stamped in hour/minute/second
format (for example, 09:15:23). The time is that of the most recent
occurrence of the code.
5. Date: Diagnostic codes are date-stamped in a month/day/year format
(for example, 09/12/01) to indicate the most recent occurrence of the
code.
6. Corrupted: The microprocessor regularly cross checks the data in
memory. If it determines that the diagnostic code in memory has been
corrupted, a Yes entry indicates that its validity is suspect.
7. Next Pg and Prev Pg buttons: The ventilator can log up to 20 error
codes but can only display 10 on a screen. Touch the Next Pg button
to view the next group of codes, or Prev Pg to view the previous group.
8. Clear Codes button: Allows you to delete diagnostic codes.
NOTE: Diagnostic codes are the primary means of fault diagnosis and should
only be deleted by a qualified service technician.
To delete diagnostic codes, touch Clear Codes. At this message:
Are you sure you want to clear the codes?
Touch YES to clear the codes or NO to retain the codes.
The hardware screen (Figure 5-9) verifies the operational integrity of
components in case of a failure during SST, EST, or performance verification.
The hardware diagnostics screen allows you to:
• Set specific air and oxygen valve flow rates and step positions.
• Incrementally open and close the exhalation valve.
• Set various analog and digital voltages.
• Control power to the blower, filter heater, and 24-V components.
• Exercise the solenoids.
• View hardware status.
Esprit® Ventilator Service Manual © Respironics, Inc. REF 580-1000-02 G