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LITE2 LJ CONTROLLER HEATER SERVICE DIAGNOSTIC GUIDE
SERVICE CODE CAUSE
REMEDY
FL 0
1. Pressure Switch opened
(open switch in the
A. Pump is not running.
A. Turn pump on or check to see that external time
safety circuit)
clock is synchronized with LJ
controller
time clock.
B. Low pump/water pressure.
B. Clean filter or clear blockage/check position of
valves in plumbing system.
C. Air is in the water line.
C. Check for air leaks in plumbing system.
D. Pressure switch fault.
D. Adjust or replace pressure switch.
Refer to qualified personnel.
2. Hi Limit Switch tripped
A. Water temperature in heater
A. Identify and correct cause of overheating.
exceeds the internal limit.
Refer to qualified personnel.
B. Limit switch fault.
B. Identify and correct loose connections or replace
switches.
Refer to qualified personnel.
3. Fusible Link opened
A. Internal cabinet temperatures
A. Identify and correct cause of overheating.
exceed the fusible link limit.
Refer to qualified personnel.
B. Fusible Link fault.
B. Identify and correct loose connections or replace
fusible link.
Refer to qualified personnel.
FL 1
1. Temperature Sensor error
(temperature sensor)
A. Temperature sensor opened or
A. Check for loose connections and inspect sensor
shorted.
wires and routing.
B. Failed sensor.
B. Replace temperature sensor.
Refer to qualified personnel.
normal operating mode. If there is a call for heat the
heater will attempt ignition again. If the ignition fails
again, contact a qualified technician to check the
heater.
All other service codes will need the attention of
a qualified technician to resolve the problem.
9.2.2 Resetting LJ Controller Service
Codes
The LJ controller will display service codes to
help in identifying fault conditions that effect the
operation of the heater (see Section 9.2.1).
There are three service codes that will reset
automatically once the fault condition has been re-
solved.
Service code FL1, "temperature sensor shorted",
will reset after the short has been repaired, or a new
sensor installed. The display will show the normal
operating icons.
Service code FL3, "flame detected when no
flame should exist", will reset after the problem has
been resolved.
Service code FL5, "brown-out condition exists",
will also reset after the condition has been resolved.
However, the reset may take up to 3 minutes. The LJ
controller checks the power supply voltage every 3
minutes. If the supply voltage drops below 85% of the
nominal supply voltage, the display will show the FL5
service code and the heater will not start the ignition
sequence. The controller will the check the supply
voltage again 3 minutes later. If the low voltage
condition still exists the FL5 service code will remain.
If the actual supply voltage is above 85% of the
nominal supply voltage, the service code will clear
automatically from the display and the heater will
resume normal operation. If the heater was in either
'POOL' or 'SPA' mode when the brown-out condition
was detected, it will remain in that mode when the
condition is resolved. If the water temperature is less
than the thermostat setting, the ignition sequence will
start automatically and the heater will operate nor-
mally.
Once any other service code has been displayed,
it will need to be reset after the fault condition has
been resolved. Once the problem has been identified
and repaired, press the SELECT key
repeatedly until the display shows the
'OFF' icon. Then press the SELECT key again to set
the controller to either 'POOL' or 'SPA'. The control-
ler should send the heater through the ignition se-
quence and the heater will operate normally.
