Ventilator & Calibration Troubleshooting
906-0731-04-01 Rev. C ZOLL Ventilator Service Manual 6–37
3316 Invalid Pulse Ox
Sensor
Description:
Alarm occurs does
when the pulse
oximeter does not
recognize the
connected sensor.
Possible Cause:
• Bad sensor,
incompatible
sensor
• Masimo Flex Cable
is bad
• Masimo board
• Check for a bad sensor or incompatible sensor -> if the
sensor is incompatible or bad -> Replace Sensor
• Check to see if Masimo Flex Cable is bad or the Internal
Masimo board is bad-> if the Masimo Flex Cable is bad
or the Internal Masimo board is bad -> Replace CPU/
SPO2 Stack kit or the front panel assembly
2421 Self Check Fault Description:
Input Circuit protection
failed
Possible Cause:
• Permanent fuse on
PIM is blown
• Check the PIM fuse -> the PIM fuse is blown -> Replace
the PIM Board
• Even if the PIM fuse is not blown if this error should
persist -> Replace PIM Board
3422 Battery Fault Description:
The device is unable to
detect a battery pack
Possible Cause:
• The battery pack is
missing
• The battery pack is
unplugged
• The battery cable is
damaged
• The battery pack is
malfunctioning
• PIM board failure
• Check to see if the battery pack is missing->battery pack
missing -> replace battery pack
• Check to see if the battery pack is unplugged -> battery
is unplugged -> plug in the battery pack
• Check to see if the battery cable is damaged -> the
battery cable is damaged -> replace battery pack
• Check to see if the battery pack is malfunctioning-> the
battery pack is malfunctioning-> replace battery pack
• If none of the above->PIM board failure -> Replace the
PIM board
2423
3423
Self Check Fault/
Battery Charging
Description:
Power system failure
Possible Cause:
• Faulty PIM Board
• Replace the PIM board
3441 External Power
Fault
Description:
The input voltage is too
high; > 33 VDC after the
fuse
Possible Cause:
• faulty external
power supply
• faulty PIM board
• Confirm that the applied voltage is in specified range ->
External Power Supply Fault -> Replace external Power
Supply
• If the above does not resolve the issue -> Faulty PIM
board ->Replace the PIM board
CODES NAME
Description /Possible
Cause
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