Hayward ColorLogic Troubleshooting Guide: Lights, Sync, GFCI & Color Shows

Hayward Universal ColorLogic (UCL) lights are low-voltage LED pool lights available in two control styles: Switched (power interruption) and Network (communication via ProLogic or OmniLogic). Both styles share the same low-voltage transformer architecture—14VAC secondary output through an all-plastic niche—but they behave very differently when something goes wrong. This guide maps every common ColorLogic problem to its dedicated step-by-step article.

Whether a light won't turn on, your pool and spa lights are out of sync, or your automation system can't find the lights, the diagnosis path depends on which style you're dealing with. Use the cards below to jump directly to the right article.

ColorLogic Troubleshooting Articles

How Hayward ColorLogic Works: A Quick Overview

Understanding the system architecture makes diagnosis much faster. ColorLogic runs on low voltage — the transformer steps 120VAC down to 14VAC, and that low-voltage power travels through the cord to the LED light in the niche. The light does not need to be bonded or grounded when installed with Hayward's all-plastic niche.

Switched style vs. Network style

Switched-style ColorLogic lights change color shows by detecting brief power interruptions. When you turn the light off for exactly 11–13 seconds and then back on, the light advances to the next show in its memory. This timing window is precise — too short or too long and the light either restarts in the same show or performs a resync instead.

Network-style lights (identified by "CUN" in the part number on the back label) communicate digitally with a ProLogic or OmniLogic controller. Instead of counting power interruptions, they receive explicit commands over the network. Network lights require ProLogic software version 4.10 or higher, a ColorLogic Network Module (AQL-COLOR-MODHV), and a network coupler on each transformer.

The four light modes

Switched-style ColorLogic lights can operate in four different modes, and mismatched modes between lights is one of the most common causes of sync problems. You can check which mode a light is in by performing a three-cycle power interruption sequence and watching which color the light briefly flashes:

• UCL Mode — Flashes red. Full color show library available.
• CL 4.0 Mode — Flashes green. Compatible with older Generation 4 ColorLogic protocol.
• CL 2.5 Mode — Flashes blue. Older compatibility mode.
• SaM Light Mode — Flashes white. Shade and Motion mode.

All lights on the same transformer or circuit must be in the same mode to sync correctly.

Voltage requirements and cord length

The transformer must output exactly 14VAC on the secondary side. The voltage at the light cord's junction point depends on cord length: 50-foot cords need 12–14VAC, 100-foot cords need 13–14VAC, and 150-foot cords require the full 14VAC with no junction box between the transformer and light. Voltage drop is the most common cause of flickering and intermittent operation.

Quick Diagnostic Checklist Before You Dig Deeper

1. Confirm the light is being called for — Verify that the automation controller or switch is actually commanding the light on.
2. Check the GFCI — A tripped GFCI on the primary 120VAC side will kill all lights on that circuit.
3. Measure transformer primary (120VAC) — No voltage here means no power to the whole circuit.
4. Measure transformer secondary (14VAC) — Low or absent voltage here means a failed transformer or bad connection.
5. Inspect junction box connections — Verify 12–14VAC is present at the junction point. Corroded or loose connections cause voltage drop and intermittent operation.
6. Isolate lights one at a time — If some lights work and others don't, you have a bad light or overloaded transformer rather than a wiring issue.