30
MB Pool & spa heater
PROBLEM
CAUSE
SOLUTION
Pilot outage.
Low gas pressure..................... Adjust gas pressure.
Restricted
pilot.........................
Clean
pilot.
Weak
pilot
generator..................
Replace
pilot.
Faulty
Detection
Electrode
or
PCB
Yellow lazy fl ame
Low gas pressure...................... Adjust gas pressure.
*Insects
or
debris
clogging
burner
intake
ports.....................Clean
burners.
Inner & Outer panels very hot *Gaps in corner of refractory
(paint blistered - thermal fuse Broken refractory caused by
in transformer failed)
shipping damage or improper
combustion............................... Replace or re-align refractory to seal
gaps.
Replace
transformer.
Excessive
sooting
of
heat
exchanger................................ Determine cause of sooting & correct.
Takes long time to heat
Calculate temperature in °/hr...... Heat rise (°/hr.)= Heater Output
pool or spa.
Pool gallonage x 8.33
or
refer
to
heater
sizing
chart.
This does not take into account heat
loss
due
to
weather.
Filter not running long enough.....Reset time clock.
Dirty
fi lter................................. Clean fi lter.
Gas line or meter undersized......Refer to installation instructions.
Liming
Bypassing too much water..........Inspect bypass for movement, if no
movement,
replace.
U.G. not functioning................. Replace if no movement when heated.
Leaking at well.
Overacid.................................. Replace well and maintain water
chemistry
properly.
Leaking at heat exchanger.
Overacid.................................. Replace heat exchanger and maintain
chemistry
properly.
Gasket brittle and leaking -
Heater running after pump
(overheated).
shuts off................................... See pressure switch adjustment.
Refractory
damage....................
Replace
refractory.
Sooted heater........................... Determine cause of sooting and
correct.