Low Power - SDO4 Smart

Unable to Set Limits – Low Power Supply (SDO4 Smart)

Summary

This error occurs when the operator detects insufficient power during a system health check, preventing the limit setup process. The most common cause is low or unstable battery voltage, although charging or power supply faults may also contribute.

Symptoms

• “Unable to set Limits” error displayed

• Message indicates: Low Power Supply

• Operator refuses to enter or complete limit setup

Possible Causes

• Batteries not fully charged (new installations)

• Degraded or aged batteries (older than 12 months)

• No or insufficient charging voltage from PSU

• Faulty controller or PSU

• Loose or disconnected battery terminals

• Corrosion on battery leads

• No or unstable 220V AC supply

Troubleshooting Steps

1. Perform Voltage Test (Critical First Step)

• Disconnect the batteries completely

• Measure voltage on battery leads (controller/PSU side)

• Expected: ~27V DC

• If ~27V: Replace batteries

• If low/no voltage: Check PSU/controller

2. For New Installations

• Charge for at least 45 minutes

• Retry limit setup

3. For Existing Installations

• Replace batteries if older than 1 year

• If the issue persists: test the controller and PSU

4. Standard Checks

• Confirm 220V AC input

• Verify PSU connection

• Check battery connections

• Inspect for corrosion

Always test the voltage on the battery leads first (with batteries disconnected). If the reading is around 27V DC, the issue is most likely the batteries. If not, further investigation into the PSU or controller is required.

Should you need further assistance or more information, please do not hesitate to reach out to our support gurus via our Centurion Systems WhatsApp service (+27836504010).

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