Carrier ComfortVu TB-24-HM Installation And Operation Manual page 41

Technician Settings (cont.)
P05 – Enable/Disable the option to lock the [Mode] button
"L1" + " " [Mode] button can be locked
"L1" only [Mode] button cannot be locked
Note: When enabled, press and hold both [-] and [Fan] buttons
for 7 seconds to actually lock the buttons.
P06 – Enable/Disable the option to lock the [On/Off] button
"L0" + " " [On/Off] button can be locked
"L0" only [On/Off] button cannot be locked
Note: When enabled, press and hold both [-] and [Fan] buttons
for 7 seconds to actually lock the buttons.
P07 – Enable/Disable the option to lock the [+] and [-] buttons (SET)
"LS" + " " [+] and [-] buttons can be locked
"LS" only [+] and [-] buttons cannot be locked
Note: When enabled, press and hold both [-] and [Fan] buttons
for 7 seconds to actually lock the buttons.
P08 – Functionality of T1 terminals
"00" - T1 terminals are not in use
"01" - External sensor
"02" - T3 Soft start in heat sensor (FC) *
or De-icing in cool (AC )**
"03" - Door switch
"04" - Key tag
"05" - T Economizer
(DIP switch SW1.6 must be ON)
* In heating mode, the fan will not start before there
is hot water in the coil.
Note: To view T3 on the BACnet Thermostat,
see Technician Settings P84.
** Allow de-icing operation of indoor coil in cooling.
T1 terminals
Not in use
Door switch
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[Mode] [Mode]
Can Cannot
be locked be locked
[On/Off] [On/Off]
Can Cannot
be locked be locked
[+] and [-] [+] and [-]
Can Cannot
be locked be locked
T1 sensor T3 Soft start in
(External heat sensor (FC)
sensor) or De-icing in
cool sensor (AC)
Key tag T Economizer