Temp Set
(80°F - 104°F / 26.0°C - 40.0°C)
The last measured temperature is constantly displayed
on the LCD. Your spa’s set temperature range may
vary from range shown above depending on your
manufacturer’s settings.
Note that the last measured spa temperature displayed is
current only when the pump has been running for at least
1 minute.
Temp
Press the “Temp” button once to display the set
temperature. To change the set temperature, press the
pad a second time before the LCD stops flashing. Each
press of the “Temp” button will continue to either raise
or lower the set temperature.
If the opposite direction is desired, release the pad and
let the display revert to the current water temperature.
Press the pad to display the set temperature, and again
to make the temperature change in the desired direction.
After three seconds, the LCD will automatically display
the last measured spa temperature.
Mode
A button combination is used to switch between
standard, economy, and sleep modes. Press “Temp”
followed by “Light” to enter mode programming, press
“Temp” to cycle through to desired mode (LCD flashes
until confirmed), then press “Light” to confirm selection.
Standard mode
maintains the desired temperature.
Note that the last measured spa temperature displayed
is current only when the pump has been running for
at least 1 minute. “
” will appear on the display
momentarily when you switch into Standard Mode.
Economy mode
heats the spa to the set temperature only
during filter cycles. “
” will appear solid when the
temperature is not current and will alternate with the
temperature when the temperature is current.
Pressing “Jets” while in Economy mode puts the spa in
Standard-In-Economy mode,
(“
”) which operates the
same as Standard Mode, then reverts to Economy Mode
automatically after 1 hour. During this time, pressing
“Temp” followed by “Light” will revert the mode to
Economy immediately.
Sleep mode
heats the spa to within 20°F (11°C) of the set
temperature only during filter cycles. “
” will appear
on the display until mode is changed.
Standby Mode
Pressing “Temp” followed by “Aux” or “Jets 2” or
“Blower” will turn off all spa functions temporarily. This
is helpful when changing a filter. Pressing any button
exits Standby mode. On some systems the “Jets” button
will control the pump in Standby Mode (“Drain Mode”).
In this case, press any other button to exit. System will
revert to previous mode after 1 hour.
Jets
Press the “Jets” button once to turn pump 1 on or off,
and to shift between low and high speeds if equipped.
If left running, the pump will turn off after a timeout
period. The pump 1 low speed timeout on some systems
may be as long as 4 hours.
On non-circ systems, the low speed of pump 1 runs
when the blower or any other pump is on. It may also
activate for at least 1 minute every 30 minutes to detect
the spa temperature (polling) and then to heat to the
set temperature if needed, depending upon mode.
When the low speed turns on automatically, it cannot
be deactivated from the panel; however, the high speed
may be started.
Jets 2
(optional on some systems)
If your system has a second pump but your panel does
not have a “Jets 2” button, use the “Aux” button to
control pump 2.
Press the “Jets 2” button once to turn pump 2 on or
off, and to shift between low and high speeds if it is a
two-speed pump. If left running, the pump will turn off
after a timeout period.
Blower
(optional on some systems)
If your system has a blower (and only one pump), but
your panel does not have a “Blower” button, use the
“Aux” button to control the blower.
1-speed operation: on/off;
2-speed operation: med/hi/off; or
3-speed operation: lo/med/hi/off.
If left on, the blower will automatically turn off after a
timeout period.
Circ Pump
(optional)
If your system is equipped with a circ pump, it may be
configured to work in one of three different ways:
1) The circ pump operates continuously (24 hours) with
the exception of turning off for 30 minutes at a time
when the water temperature reaches 3°F (1.5°C) above
the set temperature (most likely to happen in very
hot climates).
2) The circ pump stays on continuously, regardless of
water temperature.
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Summary of Contents for ML400
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