34
Y Series TechBook
34
FLO & UPL error message / flow chart & step-by-step
The system did not detect any water flow while the primary pump was running.
Follow the troubleshooting flow chart below to identify the problem:
Make sure that the low-level programming has been properly set, with or without circulation pump
(depending on your system configuration)
There must be
adequate water in
spa for normal use
(a minimum of
18 GPM must
circulate through
the heater)
yes
Is pump
working
when you
try to start
it from
keypad?
no
Refer to
“Pump not
Working”
section
Is anything
limiting the
flow of water
into the
pipes?
yes
no
Remove
anything
obstructing
filter Clear
any air locks
and verify
water valves
Verify if
inflo cable
is properly
connected
If problem
persists,
replace
heater
If problem
persists,
replace
spa pack
FLO
Primary pump is activated,
but the system doesn't
detect any water flow
• Make sure water valves
are open and that water
level is high enough
• Check and remove
anything obstructing
the filter
• Make sure there is
adequate flow and that
no airlocks are trapped
in the unit's plumbing
Pumps may make
strange noises
If airlocks are formed,
start the pump and
slowly loosen one
of the union nuts to
release the air trapped
in the plumbing
Tighten the nut again
after you are done
• Make sure that the
pump associated to the
heater (primary pump)
is running
• Make sure the inflo
cable (located above
the heater) is properly
connected
• If problem persists
replace heater
• If the problem is
not solved replace
the spa pack
Step-by-Step
Flow chart
inflo cable
