Hayward HC Series User Manual

Universal HC Series Heater ®
Troubleshooting Guide
TSG-UHC21a
Copyright 2021 Hayward Holdings

Hayward HC Series Specifications

General

Control System	Digital
Maximum Working Pressure	50 PSI
Water Connection	2"
Control Type	Digital
Input BTU	400, 000 BTU/hr
Dimensions	Varies by model
Weight	Varies by model

Summary

Safety Precautions

Troubleshooting and Diagnostics

Diagnostic Codes

Wiring Diagram

Heater Not Powering Up

Step-by-step guide to diagnose and resolve power issues.

Open FC1 &/or F2 Fuse

Open F1 Fuse

Open FC4 Fuse

Service LED ON: BD Code

Diagnosis and resolution for the 'BD' service LED code.

Service LED ON: EE or CE Code

Troubleshooting 'EE' (ICB failure) and 'CE' (communication) errors.

Service LED ON: IO or SB Code

Diagnosing 'IO' (ignitor open) and 'SB' (stuck button) codes.

Service LED ON: SF or HS Code

Troubleshooting 'SF' (sensor failure) and 'HS' (high sense) codes.

Service LED ON: PF Code

Diagnosing and resolving the 'PF' (polarity failure) code.

Service LED ON: HF Code

Troubleshooting 'HF' (heat or flame sensed) code.

Service LED ON: LO Code

Diagnosing 'LO' (limit open) code related to water flow.

Service LED ON: IF Code

Troubleshooting 'IF' (ignition failure) code.

Service LED ON: AC Code

Service LED ON: A1, A2, A3 Codes

Service LED ON: b1 Code

Service LED ON: b2 Code

Service LED ON: b3 Code

Service LED ON: b4 Code