Before You Call For Service; Regular Dealer Maintenance - Carrier 50ZP Owner's Manual

NOTE: THERE MAY BE MORE THAN ONE ELECTRICAL
DISCONNECT SWITCH.
S ALTHOUGH SPECIAL CARE HAS BEEN TAKEN TO
MINIMIZE SHARP EDGES IN THE CONSTRUCTION OF
YOUR UNIT, BE EXTREMELY CAREFUL WHEN
HANDLING PARTS. DO NOT REACH INTO THE UNIT.
Check the Air Filter
CAUTION
!
UNIT OPERATION HAZARD
Failure to follow this caution may result in
damage.
Never operate your unit without filters in place. An
accumulation of dust and lint on internal parts of your unit
can cause loss of efficiency and blower motor and/or
compressor damage.
A dirty air filter will cause excessive strain on the compressor and
blower motor. This can cause the components to overheat and
automatically shut down. In the extreme, the components will fail
and need to be replaced. To avoid inefficient or failed operation of
your unit, CHECK THE FILTER(S) EVERY 3 TO 4 WEEKS.
Replace filter(s) when necessary, or clean the filter(s) if you have
the reusable type.
Disposable filters should be replaced by similar, new filters of the
same dimensions.
Reusable, permanent filters should be washed in a solution of cold
water and mild detergent, then rinsed and thoroughly dried. THE
FILTER MUST BE COMPLETELY DRY BEFORE BEING
REINSTALLED. To avoid prolonged shutdown of your unit while
a filter is drying, you should have an extra filter on hand. This
would allow you to rotate between the two with minimal downtime
for your comfort system. Extra filters may be purchased from your
dealer. The filter(s) and filter rack for a packaged system are
supplied and installed by the contractor or dealer. Typically, the
filter(s) and rack are located in the return- -air duct at the outdoor
unit or behind the return- -air grille(s). Have your dealer show you
the location of your filter(s) and the procedures for removal and
replacement. If you have any questions about the removal and/or
cleaning of your filter(s), contact your dealer for assistance. If grass
clippings, leaves, shrubbery, and debris are kept away from the
unit, minimal care should be sufficient to keep the system
functioning properly. However, if the outdoor coil becomes dirty,
use a brush or vacuum cleaner and soft brush attachment to clean
the exterior surface. If dirt is deep in the coil, contact your dealer
for service. The outdoor fan motor may have to be disconnected
and the top panel removed to gain access to the coil for thorough
cleaning. Do not attempt this yourself.
Copyright 2011 Carrier Corp. S 7310 W. Morris St. S Indianapolis, IN 46231
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
MAIN
ON
OFF
property
Unit Support
Your packaged unit should be maintained at a level position. If its
support should shift or settle so that the unit is no longer level, you
should correct the condition. Relevel it promptly to assure
condensate drainage out of the unit. If you notice that water or ice
collects beneath the unit, arrange for it to be drained away from the
unit.

BEFORE YOU CALL FOR SERVICE,

CHECK FOR THESE EASILY SOLVED
Check the indoor and outdoor disconnect switches. Verify that
circuit breakers are ON.
Check for sufficient airflow. Check the air filter(s) for any
accumulations of dirt. Check for blocked return- -air or supply air
grilles. Be sure grilles are open and unobstructed.
Check the settings on your indoor thermostat. If you desire
cooling, see that the temperature control selector is set below room
temperature and the SYSTEM switch is on the COOL or AUTO
position. If you require warmth, be sure the temperature control
C07331
selector is set above room temperature and the SYSTEM switch is
at HEAT or AUTO. The FAN switch should be set at ON for
continuous blower operation or AUTO if you wish the blower to
function only while the unit is operating.
If your comfort system still fails to operate, contact your servicing
dealer for troubleshooting and repairs. Specify your apparent
problem, and state the model and serial numbers of your
equipment. (You should have them recorded on page 1 of this
booklet.) With this information, your dealer may be able to offer
helpful suggestions over the phone, or save valuable time through
knowledgeable preparation for the service call.

REGULAR DEALER MAINTENANCE

In addition to the routine maintenance that you perform, your
home comfort system should be inspected regularly by a properly
trained service technician. The inspection (preferably each year, but
at least every other year) should include the following:
S Routine inspection of air filter(s). Replacement or cleaning as
required.
S Inspection and cleaning of the blower wheel, housing, and
motor. Service should include proper lubrication of these
components.
S Inspection and, if required, cleaning of indoor (evaporator) and
outdoor (condenser) coils.
S Inspection of the indoor coil drain pan, plus the primary and
secondary drain lines. Service should include cleaning if
required.
S A check of all electrical wiring and connections.
S A check for secure physical connections of individual
components within units.
S Operational check of the air conditioner system to determine
actual working condition. Necessary repair and/or adjustment
should be performed at this time.
Record the model, product and serial numbers of your new
equipment in the spaces provided on page 1. This information,
along with the other ready- -reference facts, will be necessary
should you ever require information or service.
Printed in U.S.A. Edition Date: 12/11
4
PROBLEMS
FOR THE RECORD
Catalog No: OM50ZP---02
Replaces: OM50ZP--- 01