Honeywell T8602D Chronotherm IV Installation Instructions Manual page 12

T8602D CHRONOTHERM
Symptom
System on indicator Fan operation set for 0
(flame=heat, (conventional heat) when it
snowflake=cool) is should be set for 1 (electric
displayed, but no heat)
warm or cool air is
Conventional heating equipment
coming from the
turns on the fan when the
registers.
furnace has warmed up to a
setpoint.
Heating or cooling equipment is
not operating.
Outdoor tempera- Option not activated.
a
ture not displayed
Outdoor Outdoor sensor is connected
temperature incorrectly.
a
display is incorrect
Wrong sensor.
Thermostat Backlight can fade over the life
backlight appears of the batteries.
dim.
a
Select models.
Automation and Control Solutions
Honeywell
1985 Douglas Drive North
Golden Valley, MN 55422
69-1507—2 G.H. Rev. 12-02
®
IV DELUXE PROGRAMMABLE THERMOSTATS
Table 6. Troubleshooting Guide. (Continued)
Possible Cause
Honeywell Limited-Honeywell Limitée
35 Dynamic Drive
Scarborough, Ontario
M1V 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
www.honeywell.com/yourhome