4/Tests and Troubleshooting
4-44 1503-0151-000 5/26/0
WARNING: ww
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Post-Service Checkout is required after you complete this section. You
must perform section " 3/Post-Service Checkout" after performing any
maintenance, service or repair. Failure to do so may result in patient injury.
Alarm
Message/Symptom
Condition/Probable Cause Service Action
+15V analog Out-of-Range
Minimum System Shut-
down
+ 15V out of range 1. Reboot ventilator, if problem
continues measure +15V±.75V at
J3 pin 1 and pin 2. If out of spec,
disconnect CPU, measure again.
If within spec continue
2. Replace CPU board
3. Replace the PSB
+15V SIB Out-of-Range
Minimum System Shut-
down
+15V out of range 1. Reboot ventilator, if problem
continues measure +15V at J3
pin 1 and pin 2. If out of spec
2. Replace PSB board
3. Replace the CPU board
4. Replace SIB
Manifold pressure sensor
failure
Minimum system monitor-
ing
Drive pressure limit switch
engages and manifold pressure
is not greater than 80 cmH2O
or bootup calibration of manifold
failed.
Reboot ventilator, if problem con-
tinues replace CPU board
Pressure control PEEP
disabled
Manifold pressure < airway pres-
sure
Ventilate in volume mode only
(without PEEP. Ventilator needs
service).
Sequential Watchdog
Failure
Minimum System Shut-
down
Time-out or state failure. Moni-
toring is not functioning or unreli-
able.
Reboot ventilator, if problem con-
tinues replace CPU board
Vaux_ref out-of range
Minimum system shutdown
+5.8 V out of range
Range is +4.988 Vdc to +6.09
Vdc
1. Reboot ventilator, if problem
continues measure +5.8 V at J3,
pin 5 and pin 6. If out of spec dis-
connect CPU. Measure again. If
within spec, continue
2. Replace the CPU board
3. Replace PSB
Vext_ref out- of-range
Minimum system shutdown
+1.225 V out of range Reboot ventilator, if problem con-
tinues replace CPU board
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