ML550, 551, 554

Panel Operation

Cool/Warm

ML500, 551, 554

Press the “Cool” or “Warm” button once to display the set

temperature. Each time either button is pressed again, the

set temperature will increase or decrease depending on

which button is pressed. After three seconds, the LCD will

automatically display the last measured spa temperature.

Mode

ML500, 551, 554

This button is used to switch between Standard,

Economy, and Sleep modes. Press “Mode” to enter mode

programming, press “Cool” to cycle through to desired

mode (LCD ﬂashes until conﬁrmed), then press “Mode” to

conﬁrm selection.

Sleep mode heats the spa to within 11°C (20°F) of the set

temperature only during ﬁlter cycles. “

” will appear on

the display until mode is changed.

Standby Mode

Pressing “Cool” or “Warm” followed by “Blower” or “Jets 2”

or “Aux” 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 1” 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 1

Press the “Jets 1” 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 time-out period. The

pump 1 low speed time-out 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)

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

time-out period.

Please refer to the following User Guides for more detailed information:

ML551/ML554 User Guide: P/N 40632-99

ML 550 User Guide: P/N 40569-99

ML551 ML554

HeatHeat

Warm

Light

Warm

Jets 1

Jets 2

Light

Mode

Cool

Blower

ML550

HeatHeat

Warm

Light

Warm

Jets 1

Jets 2

Light

Mode

Cool

Blower

Heat

Cool Warm Jets 1 Jets 2 Blower Light Mode

Balboa ML554 - ML550;ML554 Panel Feature Details; Blower Control; Spa Light Control; Preset Filter Cycle Configuration

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