Jandy LXi - Page 41

LXi
™
Pool/Spa Heater Installation and Operation Manual Page 41
Table 10. LXi Troubleshooting Guide
#
Symptom Cause Remedy
1. Pump not operating A. No power
B. Pump defective
C. Incorrectly wired
D. Time clock settings not synchronized with
actual time
A. Check circuit breakers and power source.
B. Replace.
C. Recheck wiring.
D. Check time clock setting.
2. Flashback on start-up A. Wrong gas
B. Burner damage
A. Make sure gas supply matches gas indicated on rating
plate.
B. Replace burner.
3. Lazy fl ame with yellow
tip
A. Wrong gas A. Make sure gas supply matches gas indicated on
rating plate.
4. Flame lifts and goes
out
A. Lean fuel/air mixture—Low supply
pressure
B. Lean fuel/air mixture—Too much
combustion air
A. Correct supply pressure to assure 2.5" W.C. (Natural)
or 9.0" W.C. (Propane) manifold pressure when fi ring.
B. Check burner throat pressure, adjust to 1.0" W.C.
5. Short yellow streaked
fl ame
A. Rich fuel/air mixture— Hi manifold
pressure
B. Rich fuel/air mixture— Too little
combustion air
A. Correct manifold pressure to 2.5" W.C. (Natural) or
9.0" W.C. (Propane).
B. Locate and correct combustion system sealing
beneath burners (see Section 10.3). Check burner
throat pressure, adjust to 1.0" W.C.
6. Not enough heat A. Inadequate gas supply
B. Low manifold gas pressure
C. Heater size inadequate
D. Temperature rise set incorrectly
A. Gas meter too small. Gas line from meter to heater
too small.
B. Gas pressure on heater manifold, should be adjusted
to 2.5" W.C. (Natural), 9.0" W.C. (Propane).
C. Replace with heater of higher input.
D. Adjust temperature rise according to Section 7.8 of
this manual.
7. Heater pounding or
knocking
A. Water fl ow through heater or knocking A. Check temperature rise according to Section 7.8
of this manual. If temperature rise is too high,
check pipe size, pump capacity. Look for obstruction
or closed valve in system. Check for damaged internal
bypass or external bypass set wrong.
8. Heater condensing A. Low water temperature
B. Heater plumbed backwards
A. Flue product moisture will condense at the start-up
until the heater water temperature reaches the normal
operating conditions.
B. Correct Plumbing.
9. Igniter lights but main
burners will not come
on
A. Gas valve not at “on” position
B. Air in gas line
C. Gas valve failed
D. No power to gas valve
E. Low gas pressure
F. High burner throat pressure
A. Turn knob to “on” position.
B. Cycle ignition sequence until air is out of the gas line.
C. Replace gas valve.
D. Check controls for proper operation.
E. Check supply pressure and manifold.
F. Check burner throat pressure.