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LARMS
Service Code
Alarm Name/Mitigation/Resolution
3421
External Power Fail/Disconnect
The external power (either AC or DC) drops below minimum level (~11 VDC as supplied by either
the AC/DC Power Supply or a direct DC source) or power is intentionally disconnected.
Mitigation/Info: Internal Battery Operation, Check Power Connection/Supply, Monitor Battery Status
**Replace/Service Ventilator**
3422
Missing Battery
The internal battery is removed or communication between the battery and CPU has failed. When
external power is applied, the unit is capable of operation; however, loss of external power will
result in loss of ventilation and a High Priority alarm. Operating in this state should only be done
when no other alternatives are available.
Mitigation/Info: No Battery Detected, DO NOT Remove External Power!, Maintain External Power!
**Replace/Service Ventilator**
3423
Battery Charge Circuit Failed
The Battery Charge Circuit has failed. Under this condition, the battery cannot be charged.
Mitigation/Info: Power System Needs Repair, Battery Cannot Charge, Maintain External Power!
**Replace/Service Ventilator**
3430
Low Battery (Low Battery-Warning)
The unit detects that there are
connected.
Mitigation/Info: Less Than 30 Minutes Operation, Connect External Power, Assure Ability to
Manually Ventilate
**Replace/Service Ventilator**
3431
Low Battery
External power is connected to a unit that has an internal battery that has drained to a Low Battery
status.
Mitigation/Info: Less Than 30 Minutes Internal Backup, Operating With External Power, Continue
Charging With External Power, Assure Ability to Manually Ventilate
**Replace/Service Ventilator**
3441
External Power Failed (External Voltage High)
The supplied DC power is >33 VDC. When this occurs, the unit automatically switches to operation
using the internal battery. If the supplied voltage drops to <30 VDC, the unit automatically switches
to operation using external power.
Mitigation/Info: External Voltage Too High, Internal Battery Operation, Check/Replace Power
Supply
**Remove DC Connection**
3442
External Power Failed (Insufficient Current)
The external power supply has insufficient current. When this occurs, the unit automatically
switches to operation using the internal battery.
Mitigation/Info: Internal Battery Operation, Check/Replace Power Supply, Change Power Source
**Remove DC Connection**
4-20
≤
30 minutes of battery operation remaining and no external power is
www.zoll.com
906-0731-01 Rev. J
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