Honeywell CHRONOTHERM T8611G - Manual (Page 11)

T8611G CHRONOTHERM ® DELUXE ZONING HEAT PUMP THERMOSTAT
11 69-1414—2
TROUBLESHOOTING GUIDE (TABLE 7)
Table 7. Troubleshooting Guide.
Symptom Possible Cause Action
Display does not
come on. Thermostat is not being
powered. • 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
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.
Temperature
settings do not
change. (Example:
Cannot set the
heating higher or
the cooling lower.) The upper or lower temperature
limits were reached. 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).
The setpoint temperature range
stops were configured. Check Installer Setup numbers 34 and 35 and reconfigure the
setpoint stops.
Heating or cooling
does not come on. No power to the thermostat. Use action listed under “Display will not come on.”
Thermostat minimum off time is
activated. Wait up to five minutes for the system to respond.
Enter Installer Setup number 33.
Reconfigure the minimum off time, if required.
System selector is set to off. Verify that the system selector is set for Heat, Cool or Auto.
Thermostat is not calling for
heat or cool. 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.
System on indicator
(flame=heat,
snowflake=cool) is
displayed, but no
warm or cool air is
coming from the
registers. Thermostat is not wired
correctly to the zone panel. Verify wiring. Check if other zones can bring on the heat or cool.
Zone panel is not correctly
configured or wired correctly. If no zones can bring on the heat, verify equipment configuration
and wiring.
Outdoor tempera-
ture not displayed
a
Option not activated. Enter Installer Setup number 24 and set to 1. Thermostat must
have OT terminals and a C7089B1000 installed.
Outdoor
temperature
display is incorrect
a
Outdoor sensor is connected
incorrectly. Refer to C7089B1000 Installation Instructions and check wiring
between the thermostat and sensor.
Wrong sensor. Replace sensor with C7089B1000 Sensor.
a Select models.