Honeywell T7100D Product Data page 16

T7100D,E,F MICROELECTRONIC COMMERCIAL THERMOSTATS AND Q7100A,C,D SUBBASES
Troubleshooting Guide (continued)
Symptom
Heating does not Thermostat minimum Off time is
come on. activated and wait indicator is
(continued) displayed (T7100F only).
System selection is not set to
Heat.
O or B terminal miswired
(select models).
Cooling does not No power to the thermostat.
come on.
Thermostat minimum Off time
is activated.
System selection is not set
to Cool.
O or B terminal miswired
(select models).
Fan operation set for 00
System on indicator
(conventional heat) when it
(flame=heat,
should be set for 01 (electric
snowflake=cool) is
heat) (T7100D,F only).
lit, but no heat is
being delivered.
Conventional heating equip-
ment turns on the fan when the
furnace has warmed up to a
setpoint (T7100D,F only).
Heating equipment is not
operating.
Home and Building Control
Honeywell Inc.
Honeywell Plaza
P.O. Box 524
Minneapolis MN 55408-0524
Honeywell Latin American Division
Miami Lakes Headquarters
14505 Commerce Way Suite 500
Miami Lakes FL 33016
68-0163—3 J.S. Rev. 2-99
68-0163—3
Possible Cause
• Wait up to five minutes for the system to respond.
• Enter Installer Setup 38 (T7100F only) and reconfigure minimum On
Set system selection to Heat.
Check system description to determine whether changeover should be
energized in heat (B) or cool (O). Rewire if necessary.
• Check that X terminal is connected to the system transformer.
• Check for 24 Vac between X and R or RC and Y terminals.
• Wait up to five minutes for the system to respond.
• Enter Installer Setup 33. Reconfigure minimum Off time
Set system selection to Cool.
Check system description to determine whether changeover should be
energized in heat (B) or cool (O). Rewire if necessary.
Enter Installer Setup 02 and reconfigure the fan operation.
Wait a minute after seeing the On indicator and then check the registers.
Verify operation of heating equipment in Self-Test.
Home and Building Control
Honeywell Limited-Honeywell Limitée
155 Gordon Baker Road
North York, Ontario
M2H 3N7
Honeywell Europe S.A.
3 Avenue du Bourget
1140 Brussels
Belgium
Printed in U.S.A. on recycled
paper containing at least 10%
post-consumer paper fibers.
time (if required).
— 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.
(if required).
16
Action
Honeywell Asia Pacific Inc.
Room 3213-3225
Sun Hung Kai Centre
No. 30 Harbour Road
Wanchai
Hong Kong
www.honeywell.com/building/components