Honeywell T7300F User Manual

62-0125—3
11
T7300F SERIES 2000 COMMERCIAL MICROELECTRONIC CONVENTIONAL
OR HEAT PUMP THERMOSTAT
TROUBLESHOOTING GUIDE (Continued).
Symptom Possible Cause Action
Heating does not
turn on.
No power to the thermostat. • Check that the X terminal is connected to the system
transformer.
• Check for 24 Vac between X and R or RH terminals.
— If missing 24 Vac:
— check if the circuit breaker is tripped; if so, reset
the circuit breaker.
— check if the system fuse is blown; if so, replace
the fuse.
— check if the system switch at the equipment is in
the Off position; if so, set to the On position.
— check wiring between thermostat and HVAC
equipment and replace any broken wires and
tighten any loose connections.
— If 24 Vac is present, proceed with troubleshooting.
Thermostat minimum off -
time is activated and wait
indicator is displayed.
• Wait up to five minutes for the system to respond.
• Enter Installer Setup number 38. Reconfigure minimum
off-time (if required).
System selection is not set
to Heat.
Set system selection to Heat.
Cooling does not
turn on.
No power to the thermostat. • Check that X terminal is connected to the system
transformer.
• Check for 24 Vac between X and R or RC and Y
terminals.
— If missing 24 Vac:
— check if the circuit breaker is tripped; if so, reset
the circuit breaker.
— check if the system fuse is blown; if so, replace
the fuse.
— check if the system switch at the equipment is in
the Off position; if so, set to the On position.
— check wiring between thermostat and HVAC
equipment and replace any broken wires and
tighten any loose connections.
— If 24 Vac is present, proceed with troubleshooting.
Thermostat minimum off -
time is activated and wait
indicator is displayed.
• Wait up to five minutes for the system to respond.
• Enter Installer Setup number 33. Reconfigure minimum
off-time (if required).
System selection is not set
to Cool.
Set system selection to Cool.
System on
indicator (flame=heat,
snowflake=cool) is
displayed, but no
Conventional heating
equipment turns on the fan
when the furnace has
warmed up to a setpoint.
Wait one minute after the on indicator lights and then
check the registers.
warm or cool air is
coming from the
registers.
Heating or cooling equipment
is not operating.
Verify operation of heating or cooling equipment in self-
test.
24 Vac across all
terminals.
This is an arc suppression
voltage. Placing a load on
the terminal drops the
voltage to zero.
No action.

Honeywell T7300F Specifications

General

Brand	Honeywell
Model	T7300F
Category	Thermostat
Language	English