Troubleshooting - Daikin DSG Series Installation Instructions Manual

Every application may require a different frequency of re-
placement of dirty filters. Filters must be replaced at least
every three (3) months during operating seasons.
Dirty filters are the most common cause of inadequate heat-
ing or cooling performance. Filter inspection should be made
at least every two months; more often if necessary because
of local conditions and usage.
Dirty throwaway filters should be discarded and replaced
with a new, clean filter.
Disposable return air filters are supplied with this unit. See
the unit Specification Sheet or Technical Manual for the cor-
rect size and part number. To remove the filters, remove the
filter access panel on return side of the unit.
c f m
abinet inish aintenance
Use a fine grade automotive wax on the cabinet finish to main-
tain the finish's original high luster. This is especially important
in installations with extended periods of direct sunlight.
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lean utside Oil
The coil with the outside air flowing over it should be inspect-
ed annually and cleaned as frequently as necessary to keep
the finned areas free of lint, hair and debris.
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Ondenser nd nduced
Bearings on the condenser fan motors and the combustion
fan motor are permanently lubricated. No additional oiling is
required.
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lame ensOr ualified
A drop in the flame current can be caused by a nearly invisi-
ble coating on the flame sensor. This coating, created by the
fuel or combustion air supply, can be removed by carefully
cleaning the flame sensor with steel wool.
NOTE: After cleaning, the microamp signal should be stable
and in the range of 4 - 6 microamps DC.
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lue assages ualified
At the start of each heating season, inspect and, if neces-
sary, clean the unit flue passage.
l
ubricatiOn
The fan shaft bearings, the 1 to 2 HP supply fan motors, the con-
denser fan motors and compressors are permanently lubricated.
i & c
nsPectiOn leaning
All flue product carrying areas of the furnace, its vent sys-
tem, and main burners should be examined by a qualified
service agency before the start of each heating season. This
examination is necessary for continued safe operation. Par-
ticular attention should be given to deterioration from corro-
sion or other sources. This examination is accomplished in
the following manner.
1. Disconnect power to the unit and remove furnace section
access panel.
2. Remove burner assembly:
a. Disconnect the wires from the gas valve after noting
which wires are connected to each terminal.
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ualified ervicer nly
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raft OtOrs
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ervicer nly
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ervicer nly
b. Disconnect wires from the flame rod and ignition
electrode.
c. Disconnect the gas piping at the union.
d. The entire burner assembly can now be removed
from the unit.
NOTE: Use all screws that were removed; they are neces-
sary for safe and proper operation of the unit.
3. Inspect and periodically clean the vent outlet (bird screen)
on the access panel.
NOTE: Periodic observation of the flame and a log of C02
measurements are recommended. This will aid in determin-
ing whether the furnace is operating efficiently or if the fur-
nace requires cleaning.
Flames should be stable, soft and blue (dust may cause or-
ange tips but must not be yellow). The flames must extend
directly outward from the burner without curling, floating or
lifting off.
)
T
O AVOID PERSONAL INJURY OR DEATH DUE TO ELECTRIC SHOCK,
DO NOT REMOVE ANY INTERNAL COMPARTMENT COVERS OR ATTEMPT ANY
ADJUSTMENT.
FLAME SHOULD DEVELOP.
At least once a year, prior to or during the heating season,
make a visual check of the burner flames.
NOTE: This will involve removing and reinstalling the heat
exchanger door on the unit, which is held by two screws.
If you are uncertain about your ability to do this, contact a
qualified servicer.
If a strong wind is blowing, it may alter the airflow pattern
within the unit enough that an inspection of the burner
flames is not possible.
f
unctiOnal
Refer to the unit Parts Catalog for a list of functional parts.
Parts are available from your distributor.
i c
gnitiOn OntrOl
The following presents probable causes of questionable unit
operation. Refer to Diagnostic Indicator Chart for an inter-
pretation of the signal and to this section for an explanation.
23
Check the burner flames for:
1. Good adjustment
2. Stable, soft and blue
3. Not curling, floating, or lifting off.
Burner Flame
WARNING
C
ONTACT A QUALIFIED SERVICER AT ONCE IF AN ABNORMAL
P
arts

TROUBLESHOOTING

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rrOr Odes