Carrier 48DJE - Manual (Page 7)

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- or supply-air grilles. Be sure
they are open and unobstructed. If these checks do not re­
veal the cause, call your servicing dealer.
If your unit isn’t operating at all, check the following list
for easy solutions:
( ) Check to be sure that your thermostat temperature se­
lector is set above the indoor temperature during the heat­
ing season, or below the indoor temperature during the cooling
season. Be sure the SYSTEM switch is in the proper HEAT
or COOL position and not in the OFF position.
( ) Is the electrical supply switch ON? Are any fuses blown,
or has the circuit breaker tripped?
( ) During the heating season, check the external manual
shutoff valve. Is this lever parallel with the pipe, indicating
that the valve is open? Or is the lever at the right angle,
indicating that the valve is closed? If closed, has the gas
been shut off for safety reasons? Otherwise, you may open
the valve and follow the start-up procedures listed in this
manual.
NOTE: Before proceeding with the next check, turn OFF
the electrical power supply to the unit. Remove the control
access door.
( ) During the heating season, check the control dial on
the gas valve. Is it in the ON position? If it is not, be sure
it has not been turned off for the purpose of safety. If noth­
ing else seems to be amiss, follow the start-up procedures
in this manual.
( ) If your unit still fails to operate, eall your servicing
dealer for troubleshooting and repairs. Specify the model
and serial numbers of your unit. (Record them in this man­
ual 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 prep­
aration for the service call.
IN CASE OF TROUBLE
If, after performing the above, unit performance is un­
satisfactory, shut off the unit and call your dealer.
Dealer’s Name______________________________________________
Telephone No._______________________________________________
Unit Model_________________________________________________
Unit Serial Number.