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Subject to change without notice. Printed in U.S.A. 035-16473-001 Rev. A (202)
Copyright © by York International Corp. 2002. All rights reserved. Supersedes: Nothing
Unitary 5005 Norman
Products York OK
Group Drive 73069
2. Do not switch to Cooling or Auto
until electrical power has been
reestablished for 8 hours if the
power was off more than 8 hours.
SERVICE CALLS
There are a few instances where you
can avoid unnecessary service calls.
(See Troubleshooting Guide above).
The flashing light on the system ther-
mostat of E*TS units is capable of pro-
viding you with time and money saving
information. The fault code numbers
listed can be handled by taking the
corrective action indicated. Call quali-
fied serviceman if displaying fault code
numbers not listed.
PARTS INFORMATION
Replacement parts are available from
local YORK contractor/dealers or the
nearest YORK distribution center.
CHARACTERISTICS OF
HEAT PUMPS
A CONSTANT HEAT
Heat pumps have a noticeably cooler
supply air temperature than furnaces.
The common practice of over-sizing
furnaces contributes to an “off-and-on-
again” operation with short blasts of
hot supply air. The heat pump system
is sized more closely to the heating
needs of your home. Heat is supplied
at a lower temperature over a longer
period of time to provide a more con-
stant heat, and it may give you the
impression that your system “never
stops running".
WATER RUN-OFF
During the heating cycle, in mild
weather you may notice water running
off the outdoor coil. Moisture from the
air is condensed on the outside sur-
face of the coil where it gathers and
runs off.
No need for alarm, your unit has not
sprung a leak!
OUTDOOR COIL DEFROSTING
At certain outdoor conditions (low tem-
perature, high humidity), frost may
build up on the coil of the outdoor unit.
In order to maintain heating efficiency,
the system will automatically defrost
itself. Steam rising from the outdoor
unit is normal and is an indication of
proper operation. The vapor cloud will
only last for a few minutes. When the
defrost cycle is completed, the system
will automatically switch back to heat-
ing. Electric heat is automatically ener-
gized to maintain comfort during
defrost.
TROUBLESHOOTING GUIDE
PROBLEM CHECK: ACTION TO TAKE FAULT CODE
NO HEAT OR
COOLING
1. Thermostat for proper setting. Set thermostat to proper setting. -
2. Circuit breakers and fuses. Reset circuit breakers - Replace blown fuses. -
3. Check Outdoor unit for dirty coil. (Cooling) Clean coil, see “Coil Care” section. 2
4. Outdoor unit for snow accumulation. (Heating) Remove snow. 5
5. Indoor unit for dirty filter. (Heating) Clean or Replace, see “Filter Care” section. 2
6. Emergency Heat Light Status on thermostat.
After completing the checks and actions above, turn thermostat to “OFF” for 10 seconds and attempt
restart. Wait 5 minutes. If system does not start, call qualified serviceman.
Obtain the fault code number of times the Emergency Heat light on the thermostat flashes between
pauses.