ZOLL 731 Series Operator's Manual page 99

Service Code Alarm Name/Mitigation/Resolution
3444 External Power Failed
The voltage polarity is reversed when the unit is attached to an external DC source. When this
occurs, the unit automatically switches to operation using the internal battery.
Mitigation/Info: DC Voltage Reversed, Internal Battery Operation, Disconnect Power Source
**Replace Power Source**
3455 Battery Fault-With External Power Connected (Battery Communication Failure)
The unit is not able to communicate with the internal battery and external power is connected.
Mitigation/Info: Battery Communication Failure!, DO NOT Remove External Power!, Assure Ability
to Manually Ventilate Patient
**Replace Battery Soon**
3470 Internal Communication (Comm) Failure Fault-PIM Comm
The unit is no longer able to communicate with the Power Interface Module (PIM).
Mitigation/Info: Power Management Failure, Assure Ability To Manually Ventilate Patient, Monitor
Power Source
**Replace/Service Ventilator**
3480 SPM Compatibility Fault
The unit software detects that it has not been calibrated with the SPM that is inside the unit. This
fault occurs when the biomedical technician fails to recalibrate the unit following an SPM change or
service.
Mitigation/Info: Hardware Compatibility Failure, Update Calibration Records
**Replace/Service Ventilator**
906-0731-01 Rev. J ZOLL Portable Critical Care Ventilator 4-21