HeatPro® / Summit Heat Pump Troubleshooting Guide
Fault codes and diagnostic steps for HeatPro and Summit series heat pumps.
Common Heater Problems This Guide Covers
A pool tech should open this document when a Hayward or Summit heat pump is malfunctioning, displaying an error code, or requires diagnosis and repair..
What it helps you resolve
- Heat pump not heating pool water
- Heat pump displaying LP error code
- Heat pump showing HI/HP error
- Heat pump display is blank
- Heat pump flow sensor error
- Heat pump not turning on
When not to use
This document should not be used for routine maintenance, installation, general operational instructions, or for heat pump systems not using R-410A refrigerant, nor by unqualified servicers.
Quick diagnosis
Before replacing any parts, a qualified servicer should first identify the specific heat pump model and platform (HeatPro vs. Summit) to ensure the correct wiring diagrams and error codes are used for diagnosis, and then consult the relevant error code section or flow chart.
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What does an "LP" error code on my heat pump mean?
The "LP" error code indicates a low-pressure fault within the heat pump system, requiring diagnosis as detailed in the troubleshooting guide.
Will heat pump error codes clear automatically?
The document is a troubleshooting guide for diagnosis and repair, implying that most error codes will require manual intervention or repair to clear.
What is the most common cause of heat pump faults addressed in this guide?
The guide dedicates significant sections to various "Common Error Codes" (e.g., LP, HI/HP, PO/OP, Flo/PS), suggesting that these specific fault conditions are frequently encountered.
How do I know which wiring diagrams and error codes to use for my HeatPro heat pump?
For HeatPro models HP50TA and HP21404T, you should use the Summit wiring diagrams and error codes as these models are built on the Summit platform.
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Qualified personnel only. Opening electrical panels, control boards, or equipment enclosures involves dangerous voltages and should only be performed by licensed pool or electrical technicians. Unauthorized service may void your manufacturer warranty. If unsure, contact a qualified professional.