Intex 28428 User Manual

Page 1
Pure Spa
2021SSN BUBBLE Spa Control Base Repair Guide
Characteristic Feature
Item #
28426/28428/28476
Control base #: 12836
Model #:
SB-H20；SB-H20N
Panel Digital Cable
(new) hexagon type
Control Panel
Power button on the panel
Tub shape
Round & Octagon type
Production date
Start from 2020-6-15
Introduction
The purpose of this guide is to help you understand how to repair
the most common issues with the main heating and filtration unit.
This includes problems with the various internal sensors, the
internal computer (printed circuit board), water and air pumps.
IMPORTANT
Unplug the power cord before replacing spare parts.

Intex 28428 Specifications

General

Brand	Intex
Model	28428
Product Type	Inflatable Hot Tub
Outer Diameter	77 inches
Height	28 inches
Temperature Range	68-104°F
Air Blower	Yes
Water Filtration Pump	Yes
Number of Air Jets	140
Control Panel	Digital
Included Pump	Yes
Carrying Bag	Yes
Capacity	4 people
Water Capacity (liters)	795 liters
Heating Rate	1.5 - 2.5 °C/h
Air Jets	High-Powered Bubble Jets
Included Accessories	Insulated cover, carry bag, filter cartridges
Inflation Time	Approximately 20 minutes
Water Filtration	Yes

Summary

PCB Schematic

Control Base Repair Procedures

Main Circuit Board Details

Troubleshooting Error Code E90

Flow Sensor Issues

Diagnosing and resolving E90 errors related to the flow sensor.

Water Pump Issues

Diagnosing and resolving E90 errors related to the water pump.

Transformer Issues

PCB Issues

Heating Element Issues

Troubleshooting Error Code E94

Troubleshooting Error Code E95

Troubleshooting Error Code E97

Troubleshooting Error Code E99/100/000

END/Heating Problems

Troubleshooting Blank Display

Troubleshooting Random Display or 888

Air Blower Problems

How to Replace RCD

How to Replace PCB

How to Replace Spa Control Base