Balboa Water Group ML550 - Mach 3 User Guide User Manual
Page 8

Diagnostic Messages
Message Meaning
No message on display.
Power has been cut off to the spa.
“Overheat” - The spa has shut down.
1
On
some systems, an alarm may sound. One of 
the sensors has detected 118°F (approximately 
47.8°C) at the heater.
“Overheat” - The spa has shut down.
1
One of
the sensors has detected that the spa water is 
110°F (approximately 43.3°C).
“Ice” - Potential freeze condition detected.
Spa is shut down.
1
The sensor that is plugged
into the Sensor “A” jack is not working.
Spa is shut down.
1
The sensor that is plugged
into the Sensor “B” jack is not working.
Sensors are out of balance. If this is 
alternating with the temperature, it may just 
be a temporary condition. If the display 
shows only this message (periodically 
blinking), the spa is shut down.
1
A substantial difference between the 
temperature sensors was detected. This could 
indicate a flow problem.
Persistent low flow problems. (Displays on the 
fifth occurrence of the “
” message within
24 hours.) Heater is shut down, but other spa 
functions continue to run normally.
Inadequate water detected in heater.
Inadequate water detected in heater. (Displays 
on third occurrence of “
” message.) Spa is
shut down.
1
When your spa is first actuated, it will go into 
Priming mode.
Action Required
The control panel will be disabled until power returns. 
Time of day will be preserved for 30 days with a battery 
back-up on EL8000 and EL5000 systems. EL1000 and 
some EL2000 systems reset the time of day on each 
power-up. Spa settings are preserved on all systems.
DO NOT ENTER THE WATER. Remove the spa cover 
and allow water to cool. Once the heater has cooled, 
reset by pushing any button. If spa does not reset, 
shut off the power to the spa and call your dealer or 
service organization.
DO NOT ENTER THE WATER. Remove the spa cover 
and allow water to cool. At 107°F (approximately 41.7°C), 
the spa should automatically reset. If spa does not reset, 
shut off the power to the spa and call your dealer or 
service organization.
No action required. The pumps and the blower will 
automatically activate regardless of spa status.
If the problem persists, contact your dealer or service 
organization. (May appear temporarily in an overheat 
situation and disappear when the heater cools.) 
If the problem persists, contact your dealer or service 
organization. (May appear temporarily in an overheat 
situation and disappear when the heater cools.) 
If the problem persists, contact your dealer or 
service organization.
Check water level in spa. Refill if necessary. If the water 
level is okay, make sure the pumps have been primed. 
Press any button to reset.
Follow action required for “
” message. Heating
capacity of the spa will not reset automatically; you may 
press any button to reset.
Check water level in spa. Refill if necessary. If the water 
level is okay, make sure the pumps have been primed. 
Press any button to reset.
Follow action required for “
” message. Spa will not
automatically reset; you may press any button to reset.
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 the Standard mode.
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1
On some systems even when spa is shut down, some equipment may occasionally turn on to continue monitoring temperature or if
freeze protection is needed.
