Carrier 48VL-A - Manual (Page 8)

STEP 1
Fig. 8 - To Shut-off Unit Electric Cooling
BURNER FLAME
6, Inspection and cleaning of blower wheel housing and
motor.
7, Inspection of all supply-air and return-air ducts for leaks,
obstructions, and insulation integrity. Any problems found
should be resolved at this time,
8, Inspection of the unit base to ensure that no cracks, gaps,
etc,, exist which may cause a hazardous condition,
9, Inspection of the unit casing for signs of deterioration,
10, Inspection of all electrical wiring and components to assure
proper connection.
If, Inspection for leaks in the refrigerant circuit. Pressure
check to determine appropriate refrigerant charge.
12, 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 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
for blocked return-air or supply-air grilles. Be sure they are open
and unobstructed. If these checks do not reveal the cause, call your
servicing dealer.
If your unit is not operating at all, check the following list for
easy solutions:
( ) Check to be sure that your thermostat temperature selector is
set below the indoor temperature during the cooling season or
above the indoor temperature during heating season. Be sure the
SYSTEM switch or MODE control is in the COOL or HEAT
position and not in the OFF position,
( ) 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
offer suggestions over the phone, or save valuable time through
knowledgeable preparation for the service call.
In Case of Trouble
If you perform the steps above and unit performance is still
unsatisfactory, shut off the unit and call your dealer.
Copyright 2009 Carrier Corp, • 7310 W, Morris St. • Indianapolis, IN 46231 Edition Date: 04/09 Catalog No: OM48ES-VL-02
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations. Replaces: OM48ES-VL-01