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    EL/GL Series - Mach 3

MLM990S Quick Reference Guide

Initial Start-up

When your spa is first actuated, it will go into Priming 
mode. 

Please see the M-7 Installation Instruction Manual 

for complete instructions on Power-up and Pump Priming.

The Priming mode will last for up to 4 minutes and 
then the spa will begin to heat and maintain the water 
temperature in Standard mode. Follow the on screen 
instructions. Make your choice, then press Enter (

).

If 

left alone, the system will resume after 4 minutes. The 
Home display screen will then appear after completion.

To Navigate:

 Use the buttons on the front panel to move 

within the menu: Up 

, Left 

, Right 

, or Down 

.

Enter (

) chooses your menu selection.

J1

J2

BL

LT

HT

FC

OZ

Enter

Jets 2

Jets 1

Light

Blower

102º F

Setting the Time

From the Display Screen, select “Set”, then Enter (

).

Arrow 

 or 

 to select “Time of Day”. Enter (

).

Arrow 

 or 

 to change hour. 

Arrow 

 to select minutes. Press 

 or 

 to change. 

Repeat to change AM/PM. To Save and Exit: 

.

For quick spa temperature set-up.

  From Home screen, 

Arrow Up 

;  

 or 

 to set temperature. 

 to Exit. 

Front Panel Buttons and Lights

For instant activation, press Jets 1, Jets 2, Blower, or Light. 
The LEDs will light when activated.

Fast Keys Give Quick Access to System Set-up

Fast Keys allows you to quickly view a device and status, 
and to turn it on, off, or change modes (Hi/Med/Low).
(See User’s Manual: “Fast Keys, to Program”.)

From the Home display screen, select 
“Fast Keys”, then Enter (

). The circle 

represents the four directional keys.

Pressing the designated arrow key will 
turn the function to Hi/Med/Low or 
On/Off. Press Home (

) to exit. 

Jets 1 L

Home

98°F

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