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Page 14 506488-01Issue 1008
CONTROL SYSTEM DIAGNOSTICS
Fault Codes
Table 5
Outdoor Coil
Dirt and debris should not be allowed to accumulate on the
outdoor coil surface or other parts in the air circuit. Cleaning
should be as often as necessary to keep coil clean. Use a
brush, vacuum cleaner attachment, or other suitable means.
If water is used to clean the coil, be sure the power to unit is
shut off prior to cleaning. Care should be used when cleaning
the coil so that the coil fins are not damaged.
Do not permit the hot condenser air discharge to be
obstructed by overhanging structures or shrubs.
Vent Outlet
Visually inspect vent outlet periodically to make sure there is
no buildup of soot and dirt. If necessary, clean to maintain
adequate opening to discharge flue products.
Burners
Light the burners and allow to operate for a few minutes to
establish normal burning conditions. Observe the burner
flames. Compare this observation to Figure 10 on page 14 to
determine if proper flame adjustment is present. Flame should
be predominantly blue in color and strong in appearance.
Check that all burners are lit, and that the flame does not
impinge on the sides of the heat exchanger.
Distorted flame or yellow tipping of the natural gas burner
flame, or long yellow tips on propane, may be caused by lint
accumulation or dirt inside the burner or burner ports, at the
air inlet between the burner and manifold pipe, or
obstructions over the burner orifice.
Use a soft brush or vacuum to clean the affected areas.
Typical Flame Appearance
Figure 10
Heat
Exchanger
Burner
Flame
(Blue Only)
Burner
Gas
Manifold
DEL
sutatS
gnihsalF
etaR
tluaF
noitpircseD
hsalFwolS
hsalfenO
dnocesrep
:noitarepolamroN
taehrofllacoN
hsalFtsaF
sehsalfowT
dnocesrep
:noitarepolamroN
taehrofllaC
hsalF2
sehsalfowT
htiwdnocesni
esuapdnoces-1
:tuokcolmetsyS
tcetedotdeliaF
emalf
niatsusro
hsalF3
nisehsalfeerhT
htiwsdnoces5.1
esuapdnoces-1
hctiwserusserP
desolcronepo
hsalF4
nisehsalfruoF
htiwsdnoces2
esuapdnoces-1
rotimilhgiH
hctiwstuollor
nepo
hsalF5
nisehsalfeviF
htiwsdnoces5.2
esuapdnoces-1
desnesemalF
evlavsagdna
dezigreneton
ydaetS--
:eruliaflanretnI
rellortnoc-orciM
kcehc-fles;eruliaf