Troubleshooting - Honeywell TB3 Series Installation Instructions Manual

TB3 SERIES COMMUNICATING THERMOSTATS INSTALLATION INSTRUCTIONS

TROUBLESHOOTING

Trouble
The system is not
cooling, even though the
set point is correct.
The system is
continuously
overcooling, even though
the set point is correct.
The system is not
heating, even though the
set point is correct.
The system is
continuously
overheating, even
though the set point is
correct.
Keypad doesn't work /
Keys do not respond
Forgot Password
31-00576-01
Possible Cause
Cooling mode is not
activated
Heating mode is
activated
Heating mode is
activated
Cooling mode is not
activated
Key lock is activated
• Use key to set the mode to
• Check if the set point is lower than room temperature.
• Be sure the (Cooling Valve icon) is displayed.
• After a while, check whether the system starts cooling.
• If the system is continuously over cooling, change the
(Mode) to (Cooling) and wait for the
icon) to close.
• Please contact your Technical Support if issue persists.
IMPORTANT:
Do not select
provision for heating/hot water pipes.
• Use key to set the mode to
• Check if the set point is higher than room temperature.
• Be sure the (Heating Valve icon) is displayed.
• After a while, check whether the system starts heating.
• If the system is continuously overheating, change the
(Mode) to (Heating) and wait for the
icon) to close.
• Please contact your Technical Support if issue persists.
IMPORTANT:
Do not select
provision for cooling/chilled water pipes.
Press and keys together for a while to remove the key lock.
Contact your system administrator to learn the "Parameter
Menu Password" from the communication line.
• Please press
• Press and keys together for a while to perform a factory
reset.
8
Solution
(Cooling).
(Heating) mode in case there is no
(Heating).
(Cooling) mode in case there is no
(Cooling Valve
(Heating Valve