ETi 400 High Efficiency Pool and Spa Heater Installation and User’s Guide
Rev. A 9/2016
50
Burner Troubleshooting
SYMPTOM
CAUSE
REMEDY
Loud, high-pitched whine
Flame is too rich.
Verify pressure tap between gas valve
and blower inlet.
See page 16 and verify that the gas
regulator setting is –0.2" (–0.5cm) wc.
Flame is “fluttery .”
Flame is too lean.
See page 16 and verify that the gas
Exhaust may have acrid
regulator setting is –0.2" (–0.5cm) wc.
smell or burner may fail
to stay lit.
Burner pulsates or
Exhaust vent is too long.
Reduce length of exhaust vent and/or
surges, especially on
number of elbows.
ignition.
Combustion appears
Flame current is not
Check for wet or damaged igniter with
normal, but flame does
being sensed.
low resistance to ground. Replacewith
not stay lit.
new igniter.
Verify burner flameholder is properly
grounded.
Ignition Control Module.
Heat Exchanger Troubleshooting
SYMPTOM
CAUSE
REMEDY
Boiling in heat exchanger.
Low water flow to heater
.
pump and or filter.
May be accompanied by
Heat exchanger plugged.
Service
Service
heat exchanger. Correct water
“bumping” sounds.
chemistry.
Bypass valve stuck open.
Service bypass valve.
Replace
Contact a qualified technician or service
agency to replace the gas orifice.
Contact a qualified technician or service
agency to replace the gas orifice.
The RNC code is displayed on the
LCD to remind you to do the
maintenance on the neutralizer
cartridge.
Operator Control Panel Displays RNC Code
SYMPTOM
CAUSE
REMEDY
Operator control panel LCD displays .
the RNC code.
Neutralizer maintenance reminder.
.
To clear this code, press the OFF button
to put the heater in off mode, then press
and hold the OFF button for 5 seconds.
Contact a qualified technician or service
agency to service the condensate
neutralizer cartridge.
Section 3: Troubleshooting
