Resetting The Lj Controller Service Codes - Jandy LJ Installation And Operation Manual

Model LJ Pool and Spa Heater
# Symptom
1.
Pump not
operating
2.
Flame roll-out
on start-up
3.
Spillage at
draft hood
4.
Flame has
lazy yellow tip
5.
Not enough heat
6.
Heater pounding
or knocking
7.
Heater condensing A.Low water temperature
8.
Igniter lights but
main burners
will not come on
To clear the FL2 service code, turn off the
heater by using the SELECT key to turn the heater to
the 'OFF' position and then turn it back to either
'POOL' or 'SPA'. The heater will now go back to the
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 four service codes that will reset
automatically once the fault condition has been re-
solved.
Troubleshooting Table
Cause
A.No power
B. Pump defective
C. Incorrectly wired
D. Pump relay defective
E. Current time not within
time clock settings
F. Controller defective
A.Blocked flue
B. Igniter out of position (delayed ignition)
C. Blocked heat exchanger
D. Refractory blanket out of place
E. Altered draft hood
F. Downdraft conditions
A.Cold chimney
B. Vent pipe pitches down to chimney
C. Blocked chimney
D. Draft hood altered
E. Prefabricated chimney with incorrect cap
A.Low primary air
A.Inadequate gas supply
B. Low manifold gas pressure
C. Heater size inadequate
A.Water flow through heater too low
B. Heater plumbed backwards
A.Gas valve not at "on" position
B. Air in gas line
C. Gas valve failed
Remedy
A.Check circuit breakers and power source.
B. Replace.
C. Recheck wiring including relay if using LJ controller internal
clock.
D. Replace pump relay.
E. Set time clock and current time.
F. Replace controller.
A.Remove blockage.
B. Correct igniter position.
C. Clean and correct as necessary.
D. Correct or replace blanket as necessary.
E. Install factory-provided draft hood.
F. Install draft hood.
A.Allow heater to operate 5 minutes to create draft action.
B. Reinstall vent pipe to pitch up from heater to chimney.
C. Remove blockage.
D. Install factory-provided draft hood.
E. Install a Nationally Recognized Testing Lab (NRTL) listed vent
cap.
A.Correct manifold pressure according to rating plate. Correct
orifice size if necessary (see parts list). Clean burner ports if
dirty.
A.Gas meter too small. Gas line from meter to heater too small.
B. Gas pressure on heater manifold should be adjusted to
4.0"W.C. for natural gas, 9.0"W.C. for propane.
C. Replace with heater of higher input.
A.Check temperature rise between inlet and outlet heater
piping. See Section 7.7 for recommended range of
temperature rise. If temperature rise is above the maximum
recommended, increase pipe size or pump capacity or
locate obstruction. Check for closed valve in system.
A.Flue product moisture will condense at the start-up until the
heater water temperature reaches the normal operating
conditions.
B. Correct plumbing.
A.Turn knob to "on" position.
B. Cycle ignition sequence until air is out of the gas line.
C. Replace gas valve.
Service code FL0, "open switch in the safety
circuit", will reset after the open switch has been reset
or replaced. The display will show the normal operat-
ing icons.
NOTE: If the pump is turned off while the
heater is running, service code FL0 will be
displayed because the water pressure switch
will detect the drop in water pressure and open
the safety circuit. When the pump is restarted,
the water pressure switch will close and the
heater will resume normal operation.
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.
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