4/Tests and Troubleshooting
4-42
1503-0151-000
5/26/0
Alarm Message/
Symptom
Condition/Probable Cause
Service Action
Control setting input has
failed
Minimum system monitor-
ing
Internal software error has
occurred in a control setting
change initiated by the user.
Monitoring still available
Reboot ventilator, if problem con-
tinues replace CPU board
CPU Failure
Minimum System Shut-
down
ALU, register,... test failure.
Monitoring is not functioning or it
is unreliable
Reboot ventilator, if problem con-
tinues replace CPU board
CPU Internal Error
Minimum System Shut-
down
Internal bus error. Monitoring is
not functioning or unreliable
Reboot ventilator, if problem con-
tinues replace CPU board
Display Voltage Out-of-
Range
Minimum System Shut-
down
Voltage out-of-range. Monitoring
is not functioning or unreliable
1. Reboot ventilator, if problem
continues, measure EL display
+14.5V (10-15V) volts at J3 pin 18
to pin 11.
2.If out of spec, disconnect Dis-
play board. Measure again. If
within spec; replace Display
board, continue
3. If still out of spec, disconnect
CPU board. Measure again. If
within spec, continue.
4. Replace CPU board. Measure
again. If still out of spec, discon-
nect PSB, continue.
5. Replace PSB
Flow Valve Failure
Minimum System Monitor-
ing
Incorrect feedback. Monitoring
is still available
1. Reboot ventilator, if problem
persists, continue:
2. Disconnect the connector to
flow valve at J7. Refer to service
mode Test Flow Valve diagnostic
in section 4.
Gas Inlet Valve Circuit Fail-
ure
Minimum System Monitor-
ing
Incorrect feedback. Monitoring
still available
1. Reboot ventilator, if problem
persists, continues
2. Disconnect the connector to
GIV at J6. Refer to service mode,
Test GIV, Section 4.
Internal Ventilator Clock
Too Fast
Minimum System Shutdown
Clock frequency greater than
110% of expected value. Moni-
toring is not functioning or unreli-
able
Reboot ventilator, if problem con-
tinues replace CPU board
Internal Ventilator Clock
Too Slow
Minimum System Shut-
down
Clock frequency less than 90%
of expected value. Monitoring is
not functioning or unreliable
Reboot ventilator, if problem con-
tinues replace CPU board
Logical Watchdog Failure
Minimum System Shut-
down
Time-out or incorrect code exe-
cuted. Monitoring is not func-
tioning or unreliable
Reboot ventilator, if problem con-
tinues replace CPU board
Содержание Aestiva 7900 SmartVent
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Страница 12: ...Notes viii 1503 0151 000 3 27 97 ...
Страница 18: ...1 Introduction 1 6 1503 0151 000 5 26 0 Notes ...
Страница 44: ...2 Theory of Operation 2 26 1503 0151 000 3 27 97 Notes ...
Страница 46: ...3 Post Service Checkout 3 2 1503 0151 000 5 26 0 Notes ...
Страница 158: ...8 Schematics 8 2 7900 Ventilator 1503 0151 000 1 97 Figure 8 1 System connection block diagram ...
Страница 159: ...8 Schematics 7900 Ventilator 1503 0151 000 1 97 8 3 Figure 8 2 SIB schematic diagram interface cable connections ...
Страница 160: ...8 Schematics 8 4 7900 Ventilator 1503 0151 000 1 97 Figure 8 3 Patient interface cable Machine side ...