Burner / Heat Exchanger Troubleshooting - Pentair MASTERTEMP 200 HD Installation And User Manual

Burner Troubleshooting
SYMPTOM
Loud, high-pitched whine.
Flame is "fluttery ."
Exhaust may have acrid
smell or burner may fail
to stay lit.
Combustion appears
normal, but flame does
not stay lit.
Heat Exchanger Troubleshooting
SYMPTOM
Boiling in heat exchanger.
May be accompanied by
"bumping" sounds.
Sweating.
P/N 475106 Rev. A 2/2014
CAUSE
Flame is too rich.
Flame is too lean.
Flame current is not
being sensed.
CAUSE
Low water flow to heater.
Heat exchanger plugged.
Bypass valve stuck open.
Thermal governor stuck
closed.
Thermal governor failed.
MASTERTEMP
Section 3. Troubleshooting
REMEDY
Verify pressure tap between gas valve
and blower inlet.
See page 10 and verify that the gas
regulator setting is 1.1 ± 0.5 mbar.
Contact a qualified technician or service
agency to replace the gas orifice.
See page 10 and verify that the gas
regulator setting is 1.1 ± 0.5 mbar
Contact a qualified technician or service
agency to replace the gas orifice.
Check for wet or damaged igniter with
low resistance to ground. Replacewith
new igniter.
Verify burner flameholder is properly
grounded.
Replace Ignition Control Module.
REMEDY
Service pump and or filter.
Service heat exchanger. Correct water
chemistry.
Service bypass valve.
Replace thermal governor.
Replace thermal governor.
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