Maintenance; Troubleshooting - Daikin DCC Series Installation Instructions Manual

D C
EFROST ONTROL
N : DCH models have one stage of mechanical heating. The de-
OTE
frost accumulation period will start when either first or second stage
defrost thermostat closes. Defrost termination occurs when both
thermostats open or the 10 minute cycle has completed.
During operation the power to the circuit board is controlled by a
temperature sensor, which is clamped to a feeder tube entering
the outdoor coil. Defrost timing periods of 30,60 and 90 minutes
may be selected by connecting the circuit board jumper to 30, 60
and 90 respectively. Accumulation of time for the timing period
selected starts when the sensor closes (approximately 31° F), and
when the wall thermostat calls for heat. At the end of the timing
period, the unit's defrost cycle will be initiated provided the sen-
sor remains closed. When the sensor opens (approximately 75° F),
the defrost cycle is terminated and the timing period is reset. If the
defrost cycle is not terminated due to the sensor temperature, a
ten minute override interrupts the unit's defrost period.

MAINTENANCE

HIGH VOLTAGE!
D
ISCONNECT ALL POWER BEFORE SERVICING OR
. M
INSTALLING THIS UNIT ULTIPLE POWER SOURCES MAY
. F
BE PRESENT AILURE TO DO SO MAY CAUSE PROPERTY
,
DAMAGE PERSONAL INJURY OR DEATH
T
O PREVENT PERSONAL INJURY OR DEATH DUE TO IMPROPER
,
INSTALLATION ADJUSTMENT
,
MAINTENANCE REFER TO THIS MANUAL
ASSISTANCE OR INFORMATION
SERVICE AGENCY OR THE GAS SUPPLIER
S ,
HEET METAL PARTS SCREWS
,
HAVE SHARP EDGES AND IT IS NECESSARY THAT THE INSTALLER AND
SERVICE PERSONNEL EXERCISE CAUTION
The Self Contained Packaged Air Conditioner and Heat Pump should
operate for many years without excessive service calls if the unit is
installed properly. However it is recommended that the homeowner
inspect the unit before a seasonal start up. The coils should be
free of debris so adequate airflow is achieved. The return and sup-
ply registers should be free of any obstructions. The filters should
be cleaned or replaced. These few steps will help to keep the prod-
uct up time to a maximum. The Service section that follows should
help in identifying problems if the unit does not operate properly.
WARNING
.
WARNING
, ,
ALTERATION SERVICE OR
. F
OR ADDITIONAL
,
CONSULT A QUALIFIED INSTALLER
.
CAUTION
,
CLIPS AND SIMILAR ITEMS INHERENTLY
.
F
ILTERS
T
O PREVENT PROPERTY DAMAGE DUE TO FIRE AND LOSS OF
EQUIPMENT EFFICIENCY OR EQUIPMENT DAMAGE DUE TO DUST AND LINT
BUILD UP ON INTERNAL PARTS, NEVER OPERATE UNIT WITHOUT AN AIR
FILTER INSTALLED IN THE RETURN AIR SYSTEM.
Every application may require a different frequency of replacement
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 heating or
cooling performance. Filter inspection should be made at least
every two months; more often if necessary because of local condi-
tions 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 correct 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 maintain
the finish's original high luster. This is especially important in in-
stallations with extended periods of direct sunlight.
C O C
LEAN UTSIDE OIL
The coil with the outside air flowing over it should be inspected
annually and cleaned as frequently as necessary to keep the finned
areas free of lint, hair and debris.
,
L
UBRICATION
The fan shaft bearings , the 1 to 2 HP supply fan motors, the con-
denser fan motors and compressors are permanently lubricated.
F P
UNCTIONAL ARTS
Refer to the unit Parts Catalog for a list of functional parts. Parts
are available from your distributor.
THE FOLLOWING INFORMATION IS FOR USE BY QUALIFIED SERVICE
AGENCY ONLY: OTHERS SHOULD NOT ATTEMPT TO SERVICE THIS
EQUIPMENT.
Common Causes of Unsatisfactory Operation of Heat Pump on the
Heating Cycle.
I A V
NADEQUATE IR OLUME
When a heat pump is in the heating cycle, the indoor coil is func-
tioning as a condenser. The return air filter must always be clean,
and sufficient air volume must pass through the indoor coil to pre-
vent excessive discharge pressure, and high pressure cut out.
15
CAUTION
(Q S O )
UALIFIED ERVICER NLY

TROUBLESHOOTING

T I C
HROUGH NDOOR OIL