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TROUBLESHOOTING FLOWCHART
START
Is the air being discharged
out of the top of the heater 9-12
degrees cooler than the
outside air?
START
Is the air being discharged
out of the top of the heater 9-12
degrees cooler than the
outside air?
Is the pool pump timer
set to allow extended
operation of the heater?
Is t he pool pump timer
set to allow extended
operation of the heater?
Yes
Ext end the pool pump' s
hours of operation to
accommodate
additional heater run
time required in cooler
conditions.
Ext end the pool pump' s
hours of operation to
accommodate
additional heater run
time required in cooler
conditions.
Is the heater
performing
adequately?
Is the heater
performing
adequately?
Problem
Solved.
Problem
Solved.
No
Yes
Does the display read : "FS" ?
Does the display read : "FS" ?
No
Yes
HEAT ONLY MODELS: "FS"
display ed indicates air
temperature may be too low to
support the heater's
operation. Heater will remain in
defrost until air temperature
rises.
HEAT-COOL MODELS:"FS"
indicates heater is def rosting.
HEAT ONLY MODELS: "FS"
display ed indicates air
temperature may be too low to
support the heater's
operation. Heater will remain in
def rost until air temperature
rises.
HEAT-COOL MODELS:"FS"
indicates heater is def rosting.
Call AquaCal
for Assistance:
800-786-7751.
Call AquaCal
for Assistance:
800-786-7751.
No
Yes
No
Yes
No
Problem
Solved.
Problem
Solved.
HEAT ONLY MODELS: Ambient
conditions too cold to operate
heater.
HEAT-COOL MODELS: "FS"
displayed for 5-minutes or less
indic ates norm al defros t
operation.
HEAT ONLY MODELS: Ambient
conditions too cold to operate
heater.
HEAT-COOL MODELS: "FS"
display ed for 5-minutes or less
indicat es normal defrost
operation.
HEAT ONLY MODELS: Has t he air
temperat ure remained abov e
38ºF for several hours and "FS"
has been displayed throughout
the period?
HEAT-COOL MODELS: Has "FS"
remained displayed longer than
5-minut es (I f y es, shut heat er
of f.)?
HEAT ONLY MODELS: Has t he air
temperat ure remained abov e
38ºF for several hours and "FS"
has been displayed throughout
the period?
HEAT-COOL MODELS: Has "FS"
remained displayed longer than
5-minut es (I f yes , s hut heat er
off .)?
Heat Pump Running... but is it Heating?