Honeywell Chronotherm IV T8601D Installation Instructions Manual page 12

Symptom
Cooling does not No power to the thermostat. • Check that C terminal is connected to the system transformer.
come on.
Thermostat minimum off
time is activated.
System selection is not set
to Cool.
Cool setpoint is above
room temperature.
System on Fan operation set for 0
indicator (conventional heat) when it
(flame=heat, should be set for 1 (electric
snowflake=cool) heat).
is displayed, but
Conventional heating
no warm or cool
equipment turns on the fan
air is coming from
when the furnace has
the registers.
warmed up to a setpoint.
Heating or cooling
equipment is not operating
Outdoor Option not activated.
temperature not
a
displayed.
Outdoor Outdoor temperature
temperature sensor is connected
display is incorrectly.
a
incorrect.
Wrong sensor.
a
Select models.
Automation and Control Solutions
Honeywell
1985 Douglas Drive North
Golden Valley, MN 55422
69-1410—2 G.H. 12-02
Table 6. Troubleshooting Guide.
Possible Cause
• Check for 24 Vac between R and W terminals.
• Wait up to five minutes for the system to respond.
• Enter Installer Setup number 33. Reconfigure minimum off time (if
Set system selection to Cool.
Check cooling setpoint. Set cooling setpoint to desired temperature.
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 Outdoor Temperature Sensor Installation
Instructions and check wiring between the thermostat and sensor.
Replace sensor with C7089B1000 Sensor.
Honeywell Limited-Honeywell Limitée
35 Dynamic Drive
Scarborough, Ontario
M1V 4Z9
—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 HVAC equipment—
replace any broken wires and tighten any loose connec-
tions.
—If 24 Vac is present, proceed with troubleshooting.
required).
Action
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