CHARGER_OUTPUT_SHORTED
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Applicable alarms (1)
CHARGER_OUTPUT_SHORTED
Likely outcomes — click to expand
Based on 0 missions where this alarm fired in the last 90 days as of 2026-10-13
Aggregated from fleet operations and refreshed daily. Individual outcomes may vary by site and configuration.
Background
Section titled “Background”This alarm occurs when the Dock detects a possible short circuit at the charger output.
Troubleshooting Steps
Section titled “Troubleshooting Steps”graph TD
some-faults-are-intermittent-restart-th["<small><b>Step 1</b></small><br/>Action: Some faults are intermittent. Restart..."]
did-the-alarm-clear{"<small><b>Step 2</b></small><br/>Question: Did the alarm clear?"}
did-the-alarm-clear-newer{"<small><b>Step 3</b></small><br/>Question: Did the alarm clear?"}
check-short-circuit-status["<small><b>Step 4</b></small><br/>Telemetry: Enter the affected asset ID and date ..."]
is-short-circuit-detected{"<small><b>Step 5</b></small><br/>Question: Is charger_status.short_circuit_stat..."}
check-for-current-spike{"<small><b>Step 6</b></small><br/>Question: There are potentially two types of sh..."}
external-short-circuit-fault-which-means["<small><b>Step 7</b></small><br/>Action: **External short circuit fault** mean..."]
leave-dock-out-of-service-until-work-order("<small><b>Step 8</b></small><br/>Reference: Leave the Dock and Zip out of service...")
charger-internal-short-circuit-fault-whi["<small><b>Step 9</b></small><br/>Action: **Charger internal short circuit faul..."]
power-cycle-dock-for-short-circuit["<small><b>Step 10</b></small><br/>Action: Flip the breaker to turn off the Dock..."]
did-short-circuit-alarm-clear-after-breaker{"<small><b>Step 11</b></small><br/>Question: Did the issue clear after the breaker..."}
create-work-order-to-replace-charger["<small><b>Step 12</b></small><br/>Action: Create a work order to replace the ch..."]
the-dock-may-be-put-back-into-service("<small><b>Step 13</b></small><br/>Reference: The Dock may be put back into service.")
some-faults-are-intermittent-restart-th --> did-the-alarm-clear
did-the-alarm-clear -->|Yes| the-dock-may-be-put-back-into-service
did-the-alarm-clear -->|No| check-short-circuit-status
did-the-alarm-clear-newer -->|Yes| the-dock-may-be-put-back-into-service
did-the-alarm-clear-newer -->|No| check-short-circuit-status
check-short-circuit-status --> is-short-circuit-detected
is-short-circuit-detected -->|Yes| check-for-current-spike
is-short-circuit-detected -->|No| power-cycle-dock-for-short-circuit
check-for-current-spike -->|Yes| external-short-circuit-fault-which-means
check-for-current-spike -->|No| charger-internal-short-circuit-fault-whi
external-short-circuit-fault-which-means --> leave-dock-out-of-service-until-work-order
power-cycle-dock-for-short-circuit --> did-short-circuit-alarm-clear-after-breaker
did-short-circuit-alarm-clear-after-breaker -->|Yes| the-dock-may-be-put-back-into-service
did-short-circuit-alarm-clear-after-breaker -->|No| create-work-order-to-replace-charger
style some-faults-are-intermittent-restart-th fill:#dcfce7,stroke:#22c55e,color:#14532d
style did-the-alarm-clear fill:#dbeafe,stroke:#3b82f6,color:#1e3a5f
style did-the-alarm-clear-newer fill:#dbeafe,stroke:#3b82f6,color:#1e3a5f
style is-short-circuit-detected fill:#dbeafe,stroke:#3b82f6,color:#1e3a5f
style check-for-current-spike fill:#dbeafe,stroke:#3b82f6,color:#1e3a5f
style external-short-circuit-fault-which-means fill:#dcfce7,stroke:#22c55e,color:#14532d
style leave-dock-out-of-service-until-work-order fill:#f3e8ff,stroke:#a855f7,color:#581c87
style charger-internal-short-circuit-fault-whi fill:#dcfce7,stroke:#22c55e,color:#14532d
style power-cycle-dock-for-short-circuit fill:#dcfce7,stroke:#22c55e,color:#14532d
style did-short-circuit-alarm-clear-after-breaker fill:#dbeafe,stroke:#3b82f6,color:#1e3a5f
style create-work-order-to-replace-charger fill:#dcfce7,stroke:#22c55e,color:#14532d
style the-dock-may-be-put-back-into-service fill:#f3e8ff,stroke:#a855f7,color:#581c87 Hover or focus a block to preview it. Select the block to keep the preview open.
1 action
Some faults are intermittent. Restart the charger service to see if it resolves the issue. For steps, see Restart Dock Charger Service.
2 question <=2026.15
Did the alarm clear?
3 question >=2026.15.1
Did the alarm clear?
4 telemetry
Enter the affected asset ID and date range to load the Zip ↔︎ Dock Charging Health plot. Is
charger_status.short_circuit_status set to SHORT_CIRCUIT_DETECTED? Enter asset IDs and a UTC time range above to load the plot.
5 question
Is
charger_status.short_circuit_status set to SHORT_CIRCUIT_DETECTED? 6 question
There are potentially two types of short circuit faults: 1. Charger internal short circuit; 2. External short circuit fault. Do
actual_current and lz_zip_charge_voltage spike right as we detect a short circuit? Typically you will see a current spike 5-10A in the actual_current. 7 action
External short circuit fault means there may be a short on the charging interface between the Zip and Dock. This is more likely on the Zip side due to distro board failure. Create a work order from the Zip Socket Inspection template to check for shorts on the docking fin or the Zip's distro connections.
Context: During docking, the Dock applies voltage before the Zip's charge switch turns on. This lets the Dock safely check for short circuits before current flows into the Zip. If all looks good, the Zip then enables charging. In the case of a short circuit, the Dock applies voltage → current spikes to 5–10 A → Dock stops charging and raises an alarm. Normally, current should stay near zero until the Zip enables its charge switch.
Context: During docking, the Dock applies voltage before the Zip's charge switch turns on. This lets the Dock safely check for short circuits before current flows into the Zip. If all looks good, the Zip then enables charging. In the case of a short circuit, the Dock applies voltage → current spikes to 5–10 A → Dock stops charging and raises an alarm. Normally, current should stay near zero until the Zip enables its charge switch.
8 reference
Leave the Dock and Zip out of service until the external-short work order is resolved. Do not return either asset to service until the charging interface has been inspected and the short circuit fault is resolved.
9 action
Charger internal short circuit fault can be falsely triggered due to the high sensitivity of the short circuit detection firmware. In most cases, there is no meaningful current in
Keep the charger in service by restarting the charger service, shown here: Restart Dock Charger Service. If the same fault shows up 5 times consecutively, create a work order to replace the charger. Assign the appropriate template for the Dock version:
actual_current. This is NOT a hardware failure and usually will not show up constantly.Keep the charger in service by restarting the charger service, shown here: Restart Dock Charger Service. If the same fault shows up 5 times consecutively, create a work order to replace the charger. Assign the appropriate template for the Dock version:
10 action
Flip the breaker to turn off the Dock for a minimum of 30 seconds, then turn the power back on.
11 question
Did the issue clear after the breaker reset?
12 action
Create a work order to replace the charger. Assign the appropriate template for the Dock version:
13 reference
The Dock may be put back into service.
Resolution note
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