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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 t imer
set to allow extended
operation of the heater?
Is the pool pump t imer
set to allow extended
operation of the heater?
Yes
Extend the pool pump's
hours of operation to
accommodate
additional heater run
time required in cooler
conditions.
Extend 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 defrosting.
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 defrosting.
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 normal defrost
operation.
HEAT ONLY MODELS: Ambient
conditions too cold to operate
heater.
HEAT-COOL MODELS: "FS"
displayed for 5-minutes or less
indic ates norm al defrost
operation.
HEAT ONLY MODELS: Has t he air
temperature remained above
38ºF for several hours and "FS"
has been display ed throughout
the period?
HEAT-COOL MODELS: Has "FS"
remained display ed longer than
5-minutes (If yes, shut heater
off.)?
HEAT ONLY MODELS: Has t he air
temperature remained above
38ºF f or several hours and "FS"
has been display ed throughout
the period?
HEAT-COOL MOD E LS: H a s "FS"
remained display ed longer than
5-minutes (I f yes, shut heater
off.)?
Heat Pump Running... but is it Heating?
(Assumes Heating Indicator Light is Illuminated)