Section 10. Troubleshooting; Common Problems - Jandy JXi 200 Installation And Operation Manual

Jandy Pro Series, JXi
®

Section 10. Troubleshooting

10.1 Common Problems

Zodiac Pool Systems, Inc. strongly recommends that you
call a qualified service technician to perform all service
and repairs on the heater. To locate a licensed or qualified
technician service company, call Jandy Technical Support
at 800.822.7933, or visit www.jandy.com,
Symptom
Pump not operating
Unstable combustion-
(1) heater turns off and on
(2) heater ignites slowly
(3) flame lifts and goes out
(4) short yellow streaked flame
Not enough heat
(1) heater is slow to heat up
(2) heater not maintaining set
temperature
(3) Low temperature rise
Heater pounding or knocking
Igniter lights but heater does
not fire
|
Gas-Fired Pool & Spa Heater
™
Possible Cause
• No power.
• Pump defective.
• Incorrectly wired.
• Time clock settings not synchronized
with actual time.
• Wrong gas.
• Lean fuel/air mixture— low supply
pressure.
• Lean fuel/air mixture— too much
combustion air.
• Rich fuel/air mixture— high manifold
pressure.
• Rich fuel/air mixture— too little
combustion air.
• Heater size inadequate.
• Filter pump not running long enough.
• Thermal regulator valve (TRV) is
opening early or is permanently open.
• Heater plumbed backwards.
Water flow through heater too low.
•
• Failed Thermal Regulating Valve (TRV).
• Gas valve is not ON.
• Air in gas line.
• No power to gas valve.
• Low gas pressure/volume.
• High burner throat pressure.
• Gas valve failed.
Installation & Operation Manual
The following table lists some of the most common
problems when running the heater. Most problems
occur when the heater is started for the first time after
installation or at spring start-up.
• Check circuit breakers and power source.
• Replace the pump.
• Recheck wiring.
• Check time clock setting.
• Make sure the gas supply matches the gas type
indicated on the rating plate.
• Correct gas supply inlet pressure to:
- (NATURAL GAS) 4.0 " W.C. min - 10.5" W.C. max
- (PROPANE) 4.0 " W.C. min - 14.0" W.C. max
• Offset pressure should be -0.2" W.C. Use a digital
differential manometer to verify correct offset pressure.
Adjust offset pressure as needed. See
• Connect a digital differential manometer to blower throat
and gas valve port to obtain differential. Make sure the
differential value falls within the specified range for the
heater size. See
• Gas meter too small.
• Gas line from meter to heater too small.
• Check blower inlet grill for obstruction.
• Replace with heater of higher output.
• Replace TRV.
• Heater is condensing. Flue product moisture will
condense at the start-up until the heater water
temperature reaches the normal operating conditions.
• Correct the plumbing.
• Look for obstruction or closed valve in system.
• Check for damaged internal bypass.
• Variable speed pump set too low
Dirty filter or baskets
•
• Flip the switch to "on" position.
• Cycle ignition sequence until air is out of the gas line.
• Check controls for proper operation.
• Check supply pressure/volume and verify proper gas
supply pipe size.
• Replace gas valve.
NOTE: Gas valve failures are extremely rare. Please
confirm this as the root problem before replacing.
Page 37
ENGLISH
Remedy
Section 4.3
Section 4.3