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TROUBLESHOOTING GUIDE (TABLE 7)
Symptom
Display does not
Thermostat is not being
come on.
powered.
Thermostat is not fully
connected to wallplate.
Temperature
Room temperature display has
display is incorrect.
been reconfigured.
Thermostat is configured for °F
or °C display.
Bad thermostat location.
Temperature
The upper or lower temperature
settings do not
limits were reached.
change. (Example:
Cannot set the
The setpoint temperature range
heating higher or
stops were configured.
the cooling lower.)
Heating or cooling
No power to the thermostat.
does not come on.
Thermostat minimum off time is
activated.
System selector is set to off.
Thermostat is not calling for
heat or cool.
System on indicator
Thermostat is not wired
(flame=heat,
correctly to the zone panel.
snowflake=cool) is
Zone panel is not correctly
displayed, but no
configured or wired correctly.
warm or cool air is
coming from the
registers.
Outdoor tempera-
Option not activated.
a
ture not displayed
Outdoor
Outdoor sensor is connected
temperature
incorrectly.
a
display is incorrect
Wrong sensor.
a
Select models.
T8611G CHRONOTHERM
Table 7. Troubleshooting Guide.
Possible Cause
®
DELUXE ZONING HEAT PUMP THERMOSTAT
• Check for 24 Vac between R and C terminals.
— If missing 24 Vac:
— verify that the thermostat is correctly wired to the zone
control panel.
— R on thermostat to R on the TZ-3 and C to M1.
— R on thermostat to R on the EMM-3U and TZ-4 and
C to C.
— verify that the thermostat is correctly wired to the zone
control panel.
—replace any broken wires and tighten any loose
connections.
— If 24 Vac is present, proceed with troubleshooting
Verify that thermostat is correctly positioned and securely
latched to wallplate.
Enter Installer Setup number 37 and reconfigure the display.
Enter Installer Setup number 14 and reconfigure the display.
Relocate the thermostat.
Check the temperature setpoints:
• Heating limits are 40 to 90°F (4.5 to 32°C).
• Cooling limits are 48 to 99°F (7 to 37°C).
Check Installer Setup numbers 34 and 35 and reconfigure the
setpoint stops.
Use action listed under "Display will not come on."
Wait up to five minutes for the system to respond.
Enter Installer Setup number 33.
Reconfigure the minimum off time, if required.
Verify that the system selector is set for Heat, Cool or Auto.
Verity that the heat or cool icon (flame or snowflake) is present.
If not, raise or lower the setpoint to make a call for cool or heat.
Verify wiring. Check if other zones can bring on the heat or cool.
If no zones can bring on the heat, verify equipment configuration
and wiring.
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.
11
Action
69-1414—2
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