Honeywell Home T3 Manual page 9

TROUBLESHOOTING – T3 and T3M only
Problem Display
Thermostat display is blank
Display shows
(only for T3)
Display shows
Thermostat shoes heat
demand but boiler doesn't
respond
TROUBLESHOOTING – T3R
Problem Display
Thermostat display is blank
Display shows
Display shows
Thermostat shoes heat
demand but boiler doesn't
respond
Thermostat displays shows
and Receiver Box
LED is flashing RED
Thermostat displays shows
and Receiver Box
LED is flashing OFF
Receiver Box LED is flashing
ORANGE
ORDERING SPECIFICATION
Description
T3 Wired Thermostat
T3 Wired Thermostat for
OpenTherm Boilers
T3 Wireless Thermostat
Spare Receiver Box
Spare Wireless Thermostat
T3 PROGRAMMABLE THERMOSTAT
Possible Cause
Batteries exhausted, installed
incorrectly or tab hasn't been
removed
Battery power critically low
Faulty temperature sensor
a. Boiler water already at
temperature
b. Faulty wiring connection
Possible Cause
Batteries exhausted, installed
incorrectly or tab hasn't been
removed
Battery power critically low
Faulty temperature sensor
a. Boiler water already at
temperature
b. Faulty wiring connection
Wireless communication with
Receiver Box is lost
Thermostat and Receiver Box
not bound
Receiver Box is in bind mode
Model EAN code
T3H110A0081 5025121380515
T3H310A0045 5025121380492
Y3H710RF0072 5025121380508
R3H710RF0005 5025121380362
T3H700RF0091 5025121380386
Remedy
Unclip thermostat from wall and check
battery installation ‐ replace batteries if
necessary
Unclip thermostat from wall and replace
batteries immediately
Replace thermostat or check wiring to
remote temperature sensor if fitted
a. Normal behaviour – wait for water
temperature to drop
b. Check wiring at thermostat and boiler
terminals
Remedy
Pull thermostat from wall bracket or
table stand and check battery installation
‐ replace batteries if necessary
Pull thermostat from wall bracket or
table stand and check battery installation
‐ replace batteries if necessary
Replace thermostat or check wiring to
remote temperature sensor if fitted
a. Normal behaviour – wait for water
temperature to drop
b. Check wiring at thermostat and boiler
terminals
Move thermostat to a location where
wireless communication is reliable
Move thermostat to a location where
wireless communication is reliable
Wait for bind mode to time out (3min) or
bind a Thermostat
Literature
All packaging contains a
user guide and
installation guide in
English, Polish, Czech,
Hungarian, Slovakian,
Romanian, Bulgarian,
Ukrainian & Turkish