Pentair ETi 400 Installation And User Manual page 49

Diagnostic LEDs: PS, HLS, TF, IGN, AFS, AG1, AG2, FS
FS is on
Check if the condensate hose is
clogged with dirt and is not
draining properly.
NO
Remove condensate collector
and verify float switch can freely
move up and down.
NO
Remove dirt and clean
float switch.
tf is on
Verify stack flue temperature
is lower than 187° F (86° C)
NO
Service heat exchange or call
customer support.
Rev. A 9/2016
YES
Clean condensate hose and
neutralizer cartridge.
YES
Replace condensate collector.
Is the Stack Flue temperature
YES
over 172° F (78° C)
NO
Replace thermal fuse.
ETi 400 High Efficiency Pool and Spa Heater Installation and User's Guide
Section 3: Troubleshooting
Replace Stack Flue sensor
YES
and thermal fuse and service
Heat Exchange or call
Customer Service.
49