Honeywell T8602C Chronotherm IV Manual page 12

T8602C CHRONOTHERM® IV DELUXE PROGRAMMABLE THERMOSTATS
Symptom
System on indicator Fan operation set for 0 (con­
(flame=heat, ventional heat) when it should
snowflake=cool) is be set for 1 (electric heat).
displayed, but no
Conventional heating equipment
warm or cool air is
turns on the fan when the
coming from the
furnace has
registers.
warmed up to a setpoint.
Heating or cooling equipment is
not operating.
Outdoor Option not activated.
temperature is not
displayeda
Outdoor Outdoor sensor is connected
temperature display incorrectly.
is incorrecta
Wrong sensor.
Thermostat Backlight can fade over the life
backlight appears of the batteries.
dim.
a Select models.
Automation and Control Solutions
Honeyw ell
1985 Douglas Drive North
G olden Valley, MN 55422
69-1509—2 GH. Rev. 12-02
Table 6. Troubleshooting Guide. (Continued)
Possible Cause
Honeyw ell Lim ited-H oneyw ell Limitée
35 Dynam ic Drive
S carborough, O ntario
M 1V 4Z9
®
Enter Installer Setup number 2 and reconfigure the fan
operation.
Wait a minute after seeing the on indicator and then check the
registers.
Verify operation of heating or cooling equipment in self-test.
Enter Installer Setup number 24 and set to 1.
Thermostat must have OT terminals and a C7089B1000
installed.
Refer to C7089B1000 Installation Instructions and check wiring
between the thermostat and sensor.
Replace sensor with C7089B1000 Sensor.
• Wait until Replace Battery indicator is illuminated and replace
batteries.
• Replace batteries now.
Printed In U.S.A. on recycled
paper containing at least 10%
post-consumer paper fibers.
Action
Honeywell
www.honeywell.com/yourhome