1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of the Hayward GLX-CTL-TR-HP HP Straight Blade Control Unit. This unit is designed as a direct replacement for control units used with Hayward Goldline Aqua Trol Salt Chlorine Generator models AQ-TROL-HP and AQ-TROL-HP-TL. Please read this manual thoroughly before attempting any installation or operation to ensure safe and efficient use of your product.
2. Safety Information
WARNING: Electrical shock hazard. Always disconnect power to the Aqua Trol system at the circuit breaker before performing any service or maintenance. Failure to do so can result in serious injury or death.
- Installation and servicing must be performed by a qualified professional in accordance with all local and national electrical codes.
- Ensure the control unit is installed in a location protected from direct sunlight, rain, and excessive moisture.
- Do not operate the unit if it shows any signs of damage.
- Keep children and unauthorized persons away from the control unit.
- Always use genuine Hayward replacement parts to ensure proper operation and safety.
3. Product Overview
The Hayward GLX-CTL-TR-HP is a replacement control unit designed for specific Hayward Goldline Aqua Trol Salt Chlorine Generators. It houses the necessary electronics and user interface for managing your pool's chlorination system.

Figure 3.1: Hayward GLX-CTL-TR-HP Control Unit. The image displays the control unit with its front cover open, revealing the internal circuit board, display screen, control knob, and various indicator lights. A power cord is visible coiled at the bottom, extending from the unit. The inside of the cover shows printed instructions and diagrams.
Key Components:
- Control Panel: Features a digital display, control knob, and indicator lights for system status.
- Power Cord: For connecting the unit to a power source.
- Internal Wiring: Connections for the salt cell and other system components.
4. Setup and Installation
This unit is a replacement part. Ensure you have the correct model (AQ-TROL-HP or AQ-TROL-HP-TL) before proceeding.
- Disconnect Power: Turn off the main power to your pool equipment at the circuit breaker. Verify power is off using a voltage tester.
- Access Old Unit: Carefully open the existing Aqua Trol control unit's cover.
- Disconnect Wiring: Document or photograph all existing wiring connections before disconnecting them. Carefully disconnect the power input, salt cell output, and any other auxiliary wiring from the old control unit.
- Remove Old Unit: Unscrew and remove the old control unit from its mounting location.
- Mount New Unit: Securely mount the new GLX-CTL-TR-HP control unit in the same location using appropriate fasteners.
- Connect Wiring: Reconnect all wiring to the new control unit, ensuring each connection matches your documentation from step 3. Pay close attention to polarity and secure all terminals.
- Close Cover: Securely close the control unit cover.
- Restore Power: Turn on the main power at the circuit breaker.
- Initial Check: Observe the unit for proper power-up and initial display readings. Refer to the operating instructions for first-time setup if necessary.
5. Operating Instructions
Once installed, the GLX-CTL-TR-HP unit will function as the primary interface for your Aqua Trol salt chlorine generator. Specific operational details, such as setting chlorine output levels, timer functions, and understanding diagnostic codes, are typically found on the inside cover of the unit or in the main Aqua Trol system manual.
Basic Operation:
- Power On/Off: The unit powers on automatically when electricity is supplied.
- Chlorine Output Adjustment: Use the control knob or buttons (depending on the specific Aqua Trol model interface) to adjust the desired chlorine output percentage.
- Status Indicators: Monitor the LED indicators for "Generating," "Low Salt," "High Salt," "No Flow," and "Service" to understand the system's current status.
- Timer Function: If your Aqua Trol system includes a built-in timer, set the operating hours for chlorine generation according to your pool's needs.
For detailed programming and advanced features, refer to the complete Hayward Aqua Trol Salt Chlorine Generator manual.
6. Maintenance
The GLX-CTL-TR-HP control unit requires minimal maintenance. Regular checks can help ensure its longevity and proper function.
- Keep Clean: Periodically wipe the exterior of the control unit with a damp cloth to remove dust and debris. Do not use abrasive cleaners or solvents.
- Check Connections: Annually, with power disconnected, inspect all electrical connections for tightness and signs of corrosion.
- Environmental Protection: Ensure the unit remains protected from direct weather exposure and extreme temperatures.
- Salt Cell Maintenance: While not part of the control unit, regular cleaning and inspection of the salt cell are crucial for the overall system's performance. Refer to your Aqua Trol cell manual for details.
7. Troubleshooting
If you encounter issues with your GLX-CTL-TR-HP control unit, consider the following common troubleshooting steps. For complex issues or error codes not listed, consult a qualified pool professional or Hayward customer support.
| Problem | Possible Cause | Solution |
|---|---|---|
| Unit not powering on | No power from circuit breaker; loose power connection; internal fuse (if applicable). | Check circuit breaker; ensure power cord is securely plugged in; consult a professional for internal inspection. |
| "Low Salt" indicator on | Actual low salt level in pool; dirty salt cell; sensor issue. | Test pool salt level and add salt if needed; clean salt cell; inspect cell cable connections. |
| "No Flow" indicator on | Insufficient water flow through the salt cell; faulty flow switch. | Check pool pump and filter; ensure valves are open; inspect flow switch for debris or damage. |
| Chlorine output too low/high | Output setting incorrect; pool chemistry imbalance; worn salt cell. | Adjust output percentage; balance pool water (pH, alkalinity); consider salt cell replacement if old. |
8. Specifications
| Specification | Value |
|---|---|
| Product Dimensions | 1 x 1 x 1 inches |
| Item Weight | 8 pounds |
| Manufacturer | Hayward |
| ASIN | B005IVZHQ8 |
| Item model number | GLX-CTL-TR-HP |
9. Warranty and Support
Hayward products are manufactured to the highest standards of quality and reliability. This control unit is covered by Hayward's standard limited warranty. For specific warranty terms and conditions, please refer to the warranty card included with your original Aqua Trol system or visit the official Hayward website.
For technical support, replacement parts, or service inquiries, please contact Hayward Customer Service or visit their official website:
- Hayward Official Website: www.hayward-pool.com
- Hayward Store on Amazon: Visit the Hayward Store





