20 SC-CF & SC-MP Service Manual
Display Is Flashing
If digital thermometer water temperature reading is 112°F or higher and
keypad display indicates correct temperature, carry out the following
tests:
If display stops flashing after pressing a key, this means that a power failure has occurred.
System works fine.
To shorten filter cycle duration:
5• Press and hold
Light key for
5 seconds.
Display will
show a value
that represents the filter
cycle duration in hours.
Use Down
arrow key
to lower
the number
of hours.
0 = no filtration
12 = continuous filtration
When the
desired setting
is displayed,
press Light key
again. The filter
cycle will start
immediately.
6• If you do read 240 VAC,
replace Spa Pack.
3• Remove plastic cover. With a volt-
meter, read voltage between the
two heater wires on the board.
4• If you do not read 240 VAC, pump
may be overheating water during
filter cycle.
Shorten filter cycle duration.
If weather is very hot:
1• Remove spa cover (even during
the night). Start blower if spa is
equipped with one. Wait until
spa cools down (add cold water
if necessary).
If hot weather is not a factor:
2• Lower Set Point below current
water temperature.
The "Heater" indicator should
disappear from keypad display.
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