Thermostat information, Checkout, Troubleshooting guide – Honeywell CHRONOTERM IV T8624D User Manual
Page 10: Outdoor temperature sensor (select models)
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10
T8624D CHRONOTHERM
®
IV DELUXE ZONE MULTISTAGE THERMOSTAT
THERMOSTAT INFORMATION
³
Press
the Time
▲
▲
key to access the thermostat
information.
M4934
M4932A
M4933A
M10229
M10351
·
Press the increase
▲
key to display the production
date code. The first two large digits are the month
and the third digit is the last digit of the year
(Example: 027=February 1997).
»
Press the increase
▲
key again to display the
software identification code. (Example: 02 =
software ID code 2)
ᕤ
Press the increase
▲
key again to display the
software revision number (Example: 001=Revision
number 1).
ᕥ
Press the increase
▲
key again to display the
EEPROM identification code. (Example: 314 =
EEPROM ID 314)
²
Press the Run Program key to exit the self-test. The
self-test times out after four minutes without any key
presses.
CHECKOUT
Outdoor Temperature Sensor
(select models)
Allow the outdoor temperature sensor to soak in the
outdoor air for a minimum of five minutes before taking
a reading.
TROUBLESHOOTING GUIDE
(Continued)
Symptom
Possible Cause
Action
Display will not
come on.
Thermostat is not being
powered.
•
Check for 24 Vac between R and C terminals.
—
If missing 24 Vac:
—
check if the circuit breaker is tripped—reset the
circuit breaker.
—
check if the system fuse is blown—replace the fuse.
—
check if the power switch on the HVAC equipment is in
the Off position—set to the On position.
—
check wiring between thermostat and zone control
panel—replace any broken wires and tighten
any loose connections.
—
If 24 Vac is present, proceed with troubleshooting.
Thermostat is not fully
connected to wallplate.
Verify that thermostat is correctly positioned and securely latched
to wallplate.
Temperature
display is
incorrect.
Room temperature display
has been reconfigured.
Enter Installer Setup number 37 and reconfigure the display.
Thermostat is configured
for °F or °C display.
Enter Installer Setup number 14 and reconfigure the display.
Bad thermostat location.
Relocate the thermostat.