Page 40 LXi
™
Pool/Spa Heater Installation and Operation Manual
8. If the heater is equipped with a pressure relief
valve, clean any accumulated corrosion and make
sure that water runs freely.
9. Inspect the outside of the combustion chamber
and burner for corrosion and indication of im-
proper operation.
10. Perform a temperature rise test in accordance
with Section 7.8.
11. Regularly inspect electrical controls for deterio-
ration. Repair and replace as necessary.
12. Make a visual check of the main burner fl ame.
The fl ame can be seen in a view port on the lower
right side of the heater. The fl ame should be light
blue in color and short (see Figure 34). If fl ame
appearance is otherwise, adjustment is necessary
as described in the following section.
NOTE After installation and fi rst start-up, check the
heat exchanger for black carbon soot buildup
after the following periods of operation:
24 hours, 7 days, 30 days, 90 days and once
every 6 months thereafter.
NOTE Keep this manual in a safe place for future
reference by you and your professional
technician when inspecting and servicing the
heater.
Section 9. Troubleshooting
9.1 General Heater Troubleshooting
Table 10 lists some of the more common prob-
lems, causes and solutions encountered when running
the heater. Most problems occur when the heater is
being started for the fi rst time after installation or at
Spring start-up. Careful installation and maintenance
will help ensure years of trouble free use from your
LXi heater.
Be aware that premix combustion systems of the
type found in the LXi heaters have special character-
istics that affect operation and troubleshooting. See
Section 10.2 and Section 10.3 for important informa-
tion about the system.
9.2 Service Codes
The LXi controller monitors several functions
of the heater. In the event of a malfunction, the LXi
controller will display a FAULT message. Table 11
lists the LXi Heater Service Codes along with potential
causes and remedies.
9.3 Ignition Control LED Service Codes
In addition to the service codes shown in the
previous section, the ignition controller in the LXi
heater has an LED light that fl ashes to indicate various
different faults. Table 9 lists the LED codes and the
corresponding fault description:
Table 9. Ignition Control LED Fault Codes
LED Code Fault Description
The LED light is on continu-
ously.
Ignition Control Fault. Refer to
qualifi ed service personnel.
LED single fl ash. Air fl ow fault.
LED double fl ash. Flame exists when there is NO
call for heat. Refer to qualifi ed
service personnel.
LED triple fl ash. Ignition lockout (heater has
cycled three (3) times and has
locked out after the third try).
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