Intex 28428 User Manual

Page 16
Error Code E90
This code indicates low water pressure which could be due to an obstruction or a problem with an internal
component.
Ensure the correct connection between the control base and tub. The tub is filled with water to the
recommended level. Ensure that all filter cartridges, filter housing & suction fittings are free from any
obstruction. Turn on the spa control base.
Run the filtering function for 1 minute. If the spa display doesn’t indicate an error code and the unit is
circulating water without issue, no further troubleshooting is necessary. Remove the unit for further testing if
Error Code 90 continues to appear on the panel. If the display indicates Code E90, please follow the logic
diagram and instructions as below (E90 has two cases)：
Yes
Yes
No
Replace Filter Motor or Rotor
/Ceramic Bar, run system
Power on and run filter
Water
flow?
Remove cartridge
assembly, run system
No
1 Min
E90?
END
Terminal
5&6≈220V?
Terminal
C&D≈12V?
Terminal
A&B≈12V?
Replace PCB
Replace PCB
Replace Motor
Replace
Transformer
Yes
Yes
No
E90?
Bypass the flow sensor
terminal
END
1 Min
No
Replace Flow Sensor
Replace Heater Set
Replace PCB
Run 1 min.
E90?

Intex 28428 Specifications

General

Brand	Intex
Model	28428
Category	Hot Tub
Language	English