LED Sign Commissioning Records: Polarity Checks, Test Results, and Maintenance Handover

An LED sign commissioning record should show what was installed, how each branch was checked, what the sign did under test, and what the maintenance team needs to service it. Use the installed products’ datasheets, the approved drawings, and the project’s acceptance criteria to decide which checks apply.

Identify the sign and check polarity before startup

Start with the site, sign ID, drawing revision, commissioning date, and technician’s name. Match the installed module, power supply, and controller labels to the equipment schedule. Give each branch an identifier that appears on both the wiring diagram and the test sheet. For a channel letter sign, identify the letters or sections each branch feeds. For a cabinet sign, identify the relevant zones and service access points.

With power isolated and the circuit verified de-energized under the site’s electrical procedures, have the qualified installer trace DC positive and return from the supply to each branch termination. Use terminal markings and the wiring diagram for the exact model. Where connectors or field splices are used, confirm that the pin assignments agree on both sides and record any approved changes on the as-built drawing. Keep the affected branch isolated if its wiring cannot be confirmed.

HansonLed’s channel letter catalog lists a Mini LED Module 2 LED With Lens, and its edge-lit catalog lists an Edge Lit LED Module for Box. Use the model on the installed equipment to match the correct datasheet to the record. Channel letter LED modules and edge-lit LED modules.

Record test conditions and results

For each check, record the branch or zone, test condition, acceptance criterion, observed result, and status. Where the approved procedure calls for voltage measurements under load, note the measurement points and the operating mode. For example, a reading at the supply output and a reading at the end of a branch can help a service technician investigate a later change, provided the record identifies where and how both readings were taken. Use the equipment documentation and project requirements for the applicable limits.

Check the completed sign with its faces or diffusers installed where the acceptance procedure requires them. Record the viewing position, lighting conditions, and selected operating mode when assessing appearance. Identify any dark sections, uneven illumination, visible flicker, or color discrepancies by location. If a correction is made, retain the original observation and add the retest result. Assign an owner and a due date for any open item, and record its effect on acceptance.

Verify whole-module RGB and addressable pixel control

In whole-module RGB, the red, green, and blue channels set one color across the module. A shared controller output may drive several modules together. For that configuration, verify that each commanded primary color appears correctly across the intended zone, then check the scenes required by the project. Record the controller output and the physical zone it feeds. HansonLed’s RGB module catalog includes an item listed as RGB 3 LED Module. RGB LED module catalog.

An individually addressable RGB system can command each addressable pixel separately. The installed model determines whether an address corresponds to a single emitter or a group. If the controller and project procedure support it, step through addresses in order and compare the lit positions with the approved pixel map. Record the controller configuration, address order, and data direction where applicable. A solid-color scene can verify color across the sign, while an address sequence can reveal mapping errors. HansonLed’s pixel module catalog lists Addressable RGB Pixel. Pixel LED module catalog.

Practical checklist for maintenance handover

• File the signed commissioning sheet with the sign ID, equipment models, drawing revision, and acceptance criteria.

• Include the as-built wiring diagram with branch labels, supply and controller locations, and applicable service access points.

• Attach polarity records, required measurements with operating conditions, appearance observations, and retest results.

• For programmable signs, provide the approved controller configuration, pixel map where applicable, and instructions for restoring the configuration.

• Provide the installed models’ datasheets and identify approved replacement parts. Include any connector, mounting, or sealing requirements specified for service.

• Record outstanding items, who owns them, and who accepted the handover. Give the maintenance recipient access to the same document revision used at sign-off.

Frequently asked questions

Is a photo enough to document a passing test?

A photo can document appearance and show where a defect occurred. The signed test record should also identify the operating mode, the acceptance criterion, and any required electrical readings. Label photos so they can be matched to the sign, zone, and test entry.

What should be retested after a module is replaced?

Follow the installed model’s service instructions and the project’s maintenance procedure. Where applicable, recheck the affected branch’s polarity and connections, confirm the replacement’s operation, and verify the appearance of the serviced section. For a pixel system, also verify the affected addresses and any downstream positions covered by the procedure.

What should the record say if a required check could not be completed?

Mark it as pending, record the reason and the person responsible, and state how it affects acceptance under the project requirements. Add the dated result when the check is completed so the maintenance team can see when the issue was closed.