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Condensate
Drain
The drain pan and condensate
drain line should be checked
and
cleaned at the same time the cooling
coils are checked by your deal-
el'.
Compressor
All compressors
are factory shipped with a normal charge of the cor-
rect type of refrigeration
grade oil. A compressor
should
rarely re-
quire additional
oil.
Condenser
Fan
PERSONAL
INJURY
AND UNIT
DAMAGE
HAZARD
Failure to follow this warning
could result in personal
injury,
death or property
damage.
Do not
insert sticks, screwdrivers,
or any other object
into
revolving
fan blades•
The fan must be kept free of all obstructions
to ensure proper
cool-
ing. Contact your dealer for any required
service.
Electrical
Controls
and Wirin_
Electrical controls
are difficult to check without
proper instrumenta-
tion. If there are any discrepancies
in the operating
cycle, contact
your local dealer and request
service.
Refrigerant
Circuit
The refrigerant
circuit is difficult to check for leaks without
the prop-
er equipment.
If inadequate
cooling
is suspected,
contact your local
dealer for service.
EXPLOSION
AND BURN
HAZARD
Failure to follow this warning
could result in personal
injury,
death or property
damage.
System
under
pressure.
Relieve
pressure
and recover
all
refrigerant
before system
repair or final unit disposal.
Use all
service ports
and open
all flow-control
devices,
including
solenoid
valves.
Unit Panels
After performing
any maintenance
or service on the unit, be sure all
panels are fastened
securely
in place to prevent
rain from entering
unit cabinet and to prevent disruption
of the correct unit airflow pat-
tern.
Regular
Dealer
Maintenance
In addition
to the type of routine maintenance
you might be willing
to perform,
your unit should be inspected
regularly
by a properly
trained service technician.
An inspection
(preferably
each year, but
at least every other year) should include
the following:
1. Inspection
and, if required,
cleaning
of the outdoor
and
indoor coils•
2. Inspection
and, if required,
cleaning
of the indoor
coil drain
pan.
3. Inspection
and cleaning of blower wheel housing
and motor•
4. Inspection
of all supply
and
return
air ducts
for leaks,
obstructions,
and insulation
integrity• Any problems
found
should be resolved
at this time.
5. Inspection
of the unit base to ensure that no cracks, gaps, etc..
exist which
may cause a hazardous
condition.
6. Inspection
of the unit casing for signs of deterioration.
7. Inspection
of all electrical wiring
and components
to assure
proper connection.
8. Inspection
for leaks in the refrigerant
circuit.
Pressure check
to determine
appropriate
refrigerant
charge.
9. Inspection
of compressor
oil level
by service
person
to
ensure proper oil level is maintained
in the compressor
when
it is installed
and running•
10. Operational
check
of
the
unit
to
determine
working
conditions.
Repair or adjustment
should be made at this time.
Your servicing
dealer may offer an economical
service contract
that
covers seasonal
inspections.
Ask for further details.
Complete
service instructions
can be found in the unit Installation,
Start-up
and Service
Instructions•
Warranty
Certificate
Your 50DT unit has a limited warranty.
Be sure to read the warranty
carefully
to determine
the coverage
for your unit.
Before
you call for service...
•.•check for several easily solved problems•
If insufficient
heating
or cooling
is suspected:
( ) Check for sufficient
airflow• Check the air filter for dirt. Check
forblocked
return or supply air grilles• Be sure they are open and un-
obstructed.
If these checks do not reveal the cause, call your servic-
ing dealer•
If your unit is not operating
at all, check the following
list for
easy solutions:
( ) Check to be sure that the temperature
specified
by your UI is set
below the indoor
temperature
during
the cooling
season or above
the indoor
temperature
during heating
season.
Be sure the UI is set
to COOL
or HEAT and not OFF.
(
) If your unit still fails to operate,
call your servicing
dealer for
troubleshooting
and repairs. Specify
the model and serial numbers
of your unit. (Record
them in this manual
in the space provided.)
If
the dealer knows exactly which unit you have. he may be able to of-
fer suggestions
over the phone,
or save valuable
time
through
knowledgeable
preparation
for the service call.
In Case of Tl_uble
If you perform
the steps above and unit performance
is still unsatis-
factory,
shut off the unit and call your dealer.
®
Turn to the Expertg'i
TO OBTAIN
INFORMATION
ON PARTS:
Consult
your installing
dealer or classified
section
of your local telephone
directory
under the
"Heating
Equipment"
or "Air Conditioning
Contractors
& Systems"
heading
for dealer listing by brand name.
Have available
the Model
No.. Series Letter, & Serial No. of your equipment
to ensure correct
replacement
part.
Copyright
2007 Carrier Corporation
Printed in the U.SA
Edition
Date: 04/07
Catalo_l No: OM50-57
Manufacturer
reserves
the right
to change_ at any time_ specifications
and design without
notice and without obligation.
Replaces:
0M50-47
4
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