Honeywell PRO 2000 Series User manual

163-4356—1
Series 2000 Commercial
Microelectronic Thermostat
® U.S. Registered Trademark
Copyright © 1996 Honeywell Inc. • All Rights Reserved
Contents
Features .................................................................. 3
Programming........................................................... 4
Troubleshooting ...................................................... 18
63-4356-1

63-4356—1 2
Set Program Set Temperature Change
Time/Temp
Occupied
Temp
Unoccupied
Start Time Day
System Fan
Copy
Occupied
Start Time
Run
Program
Temporary
Occupied
Continuous
Unoccupied
Set Current
Day/Time Clear Start Time
Unoccupied
Temp
Heat/Cool
Settings
Auto
System Fan
Mon
Room
AM
Occupied
Heat
M10256
SET OVERRIDE
TEMPERATURE
OFFSET AND
ACTIVATE
TEMPORARY
OVERRIDE
ENTER HOLD MODE SET CURRENT
DAY AND TIME
CLEAR PROGRAM PERIOD COPY ONE
PROGRAMMED DAY
TO ANOTHER DAY
SELECT FAN
OPERATION
SELECT
SYSTEM
OPERATION
CHANGE BETWEEN
HEATING AND
COOLING SETPOINTS
DECREASE
TEMPERATURE
OR TIME SETTING
INCREASE
TEMPERATURE
OR TIME SETTING
SET UNOCCUPIED
TEMPERATURE
SETPOINTS
SET OCCUPIED
TEMPERATURE
SETPOINTS
SET CURRENT DAY OR
PROGRAM DAY
ENTER UNOCCUPIED
PROGRAM MODE
ENTER OCCUPIED
PROGRAM MODE
RETURNS TO
NORMAL
OPERATIONS

363-4356—1
FEATURES
•Program up to two Occupied and two Unoccupied time periods for each daily schedule.
•Set different schedules for each day of the week.
•Temporary temperature overrides.
•Program copy key.

63-4356—1 4
PROGRAMMING
The keyboard is located behind the thermostat
cover. Sixteen keys are used to set, review and
modify programmed times and temperature settings.
The thermostat display shows day, time, program
period and temperature.
The thermostat can be set for two Occupied and
two Unoccupied times for each day of the week
(28 independent time settings). Temporary Occupied
key provides quick temporary temperature changes
for increased occupant comfort. The Continuous
Unoccupied key provides energy efficient operation
for extend periods of time.
Before starting the program procedure, use the
following chart to organize the program schedule.

563-4356—1
Day Occupied Period 1 Unoccupied Period 1 Occupied Period 2 Unoccupied Period 2
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday

63-4356—1 6
The program has four temperature settings, Occupied
and Unoccupied heat and cool. The thermostat will
operate at the Unoccupied temperature setting
unless the thermostat is programmed. The following
chart shows the default temperature settings.
Occupied
Setpoint Unoccupied Setpoint
Control Default Desired Default Desired
Heating 70°F
(21°C) 55°F (13°C)
Cooling 78°F
(25.5°C) 90°F (32°C)
Setting Current Day and Time
Press Set Current Day/Time.
NOTE: On initial power up or after an
extended power loss, 1:00 pm flashes
on the LCD until a key is pressed.
M4951B
Set Current
Day/Time Set Program Set Temperature Change
Time/Temp
Occupied
Temp
Unoccupied
Start Time Day
System Fan
Copy
Occupied
Start Time
Run
Program
Temporary
Occupied
Continous
Unoccupied
Set Current
Day/Time Clear Start Time
Unoccupied
Temp
Heat/Cool
Settings
Mon
PM
Set Day/Time

763-4356—1
Press Day until the current day is displayed.
NOTE: Sun = Sunday, Mon = Monday, Tue =
Tuesday, Wed = Wednesday, Thu =
Thursday, Fri = Friday, Sat = Saturday.
M4952B
Set Program Set Temperature Change
Time/Temp
Occupied
Temp
Unoccupied
Start Time Day
System Fan
Copy
Occupied
Start Time
Run
Program
Temporary
Occupied
Continous
Unoccupied
Set Current
Day/Time Clear Start Time
Unoccupied
Temp
Heat/Cool
Settings
Day PM
Tue
Set Day/Time
Press increase ▲or decrease ▼key until the
current time is displayed.
NOTE: Tapping the Set Current Day/Time
will change the time in one hour
increments.
M4953B
Set Program Set Temperature Change
Time/Temp
Occupied
Temp
Unoccupied
Start Time Day
System Fan
Copy
Occupied
Start Time
Run
Program
Temporary
Occupied
Continous
Unoccupied
Set Current
Day/Time Clear Start Time
Unoccupied
Temp
Heat/Cool
Settings
PM
Tue
Set Day/Time
Press Run Program.
M4954A
Set Program Set Temperature Change
Time/Temp
Occupied
Temp
Unoccupied
Start Time Day
System Fan
Copy
Occupied
Start Time
Run
Program
Temporary
Occupied
Continous
Unoccupied
Set Current
Day/Time Clear Start Time
Unoccupied
Temp
Heat/Cool
Settings
Auto
System Fan
Mon
Room
AM
Occupied 1
Heat
Run
Program
Setting Program Times
Press Occupied Start Time.
NOTE: Anytime a start time is not required,
press the Clear Start Time.
AM
Mon
Occupied 1
Set Program
Start Time
M4955A
Set Program Set Temperature Change
Time/Temp
Occupied
Temp
Unoccupied
Start Time Day
System Fan
Copy
Occupied
Start Time
Run
Program
Temporary
Occupied
Continous
Unoccupied
Set Current
Day/Time Clear Start Time
Unoccupied
Temp
Heat/Cool
Settings
Occupied
Start Time

63-4356—1 8
Press Day until the desired day is displayed.
AM
Wed
Occupied 1
Set Program Start Time
M4956A
Set Program Set Temperature Change
Time/Temp
Occupied
Temp
Unoccupied
Start Time Day
System Fan
Copy
Occupied
Start Time
Run
Program
Temporary
Occupied
Continous
Unoccupied
Set Current
Day/Time Clear Start Time
Unoccupied
Temp
Heat/Cool
Settings
Day
Press increase ▲ or decrease ▼ key until the
desired start time is displayed.
NOTE: The program times are in fifteen
minute intervals. (Example: 8:00,
8:15, 8:30).
AM
Wed
Occupied 1
Set Program Start Time
M4957A
Set Program Set Temperature Change
Time/Temp
Occupied
Temp
Unoccupied
Start Time Day
System Fan
Copy
Occupied
Start Time
Run
Program
Temporary
Occupied
Continous
Unoccupied
Set Current
Day/Time Clear Start Time
Unoccupied
Temp
Heat/Cool
Settings
Press Occupied Start Time a second time to
set a second Occupied Start Time.
Wed
Occupied 2
Set Program Start Time
M4958B
Set Program Set Temperature Change
Time/Temp
Occupied
Temp
Unoccupied
Start Time Day
System Fan
Copy
Occupied
Start Time
Run
Program
Temporary
Occupied
Continous
Unoccupied
Set Current
Day/Time Clear Start Time
Unoccupied
Temp
Heat/Cool
Settings
Occupied
Start Time
Press increase ▲ or decrease ▼ key until the
desired start time is displayed.
PM
Wed
Occupied 2
Set Program Start Time
M4959A
Set Program Set Temperature Change
Time/Temp
Occupied
Temp
Unoccupied
Start Time Day
System Fan
Copy
Occupied
Start Time
Run
Program
Temporary
Occupied
Continous
Unoccupied
Set Current
Day/Time Clear Start Time
Unoccupied
Temp
Heat/Cool
Settings
Press Unoccupied Start Time.
Un
PM
Wed
Occupied 1
Set Program Start Time
M4960A
Set Program Set Temperature Change
Time/Temp
Occupied
Temp
Unoccupied
Start Time Day
System Fan
Copy
Occupied
Start Time
Run
Program
Temporary
Occupied
Continous
Unoccupied
Set Current
Day/Time Clear Start Time
Unoccupied
Temp
Heat/Cool
Settings
Unoccupied
Start Time

963-4356—1
Press increase ▲ or decrease ▼ key until the
desired start time is displayed.
Un
PM
Wed
Occupied 1
Set Program Start Time
M4961A
Set Program Set Temperature Change
Time/Temp
Occupied
Temp
Unoccupied
Start Time Day
System Fan
Copy
Occupied
Start Time
Run
Program
Temporary
Occupied
Continous
Unoccupied
Set Current
Day/Time Clear Start Time
Unoccupied
Temp
Heat/Cool
Settings
Press Unoccupied Start Time a second time to
set a second Unoccupied Start Time.
Un Wed
Occupied 2
Set Program Start Time
M4962B
Set Program Set Temperature Change
Time/Temp
Occupied
Temp
Unoccupied
Start Time Day
System Fan
Copy
Occupied
Start Time
Run
Program
Temporary
Occupied
Continous
Unoccupied
Set Current
Day/Time Clear Start Time
Unoccupied
Temp
Heat/Cool
Settings
Unoccupied
Start Time
Press increase ▲ or decrease ▼ key until the
desired start time is displayed.
Un
PM
Wed
Occupied 2
Set Program Start Time
M4963A
Set Program Set Temperature Change
Time/Temp
Occupied
Temp
Unoccupied
Start Time Day
System Fan
Copy
Occupied
Start Time
Run
Program
Temporary
Occupied
Continous
Unoccupied
Set Current
Day/Time Clear Start Time
Unoccupied
Temp
Heat/Cool
Settings
Copying a Day
NOTE: The thermostat must be in the program
mode to use the copy feature. Go to step 2
if the thermostat is already in the program
mode.
Press Occupied Start Time.
Set Program
M10255
Set Program Set Temperature Change
Time/Temp
Occupied
Temp
Unoccupied
Start Time Day
System Fan
Copy
Occupied
Start Time
Run
Program
Temporary
Occupied
Continous
Unoccupied
Set Current
Day/Time Clear Start Time
Unoccupied
Temp
Heat/Cool
Settings
Occupied
Start Time AM
Tue
Occupied 1
Start Time

63-4356—1 10
Press Day to select the day to be copied if
different from the day displayed.
M4966A
Set Program
Set Program Set Temperature Change
Time/Temp
Occupied
Temp
Unoccupied
Start Time Day
System Fan
Copy
Occupied
Start Time
Run
Program
Temporary
Occupied
Continous
Unoccupied
Set Current
Day/Time Clear Start Time
Unoccupied
Temp
Heat/Cool
Settings
Day AM
Occupied 1
Start Time
Wed
Press Copy.
M4967A
Set Program Set Temperature Change
Time/Temp
Occupied
Temp
Unoccupied
Start Time Day
System Fan
Copy
Copy
Occupied
Start Time
Run
Program
Temporary
Occupied
Continous
Unoccupied
Set Current
Day/Time Clear Start Time
Unoccupied
Temp
Heat/Cool
Settings
Wed
Press Day until the day to be copied to is
displayed.
M4968A
Set Program Set Temperature Change
Time/Temp
Occupied
Temp
Unoccupied
Start Time Day
System Fan
Copy
Occupied
Start Time
Run
Program
Temporary
Occupied
Continous
Unoccupied
Set Current
Day/Time Clear Start Time
Unoccupied
Temp
Heat/Cool
Settings
Day
Wed Thu
Press Copy.
NOTE: donE will be displayed for two
seconds and then the normal
program display will be shown.
M4969A
Set Program Set Temperature Change
Time/Temp
Occupied
Temp
Unoccupied
Start Time Day
System Fan
Copy
Copy
Occupied
Start Time
Run
Program
Temporary
Occupied
Continous
Unoccupied
Set Current
Day/Time Clear Start Time
Unoccupied
Temp
Heat/Cool
Settings

11 63-4356—1
Repeat steps through for all the days
desired.
Press Run Program.
M4954A
Set Program Set Temperature Change
Time/Temp
Occupied
Temp
Unoccupied
Start Time Day
System Fan
Copy
Occupied
Start Time
Run
Program
Temporary
Occupied
Continous
Unoccupied
Set Current
Day/Time Clear Start Time
Unoccupied
Temp
Heat/Cool
Settings
Auto
System Fan
Mon
Room
AM
Occupied 1
Heat
Run
Program
Setting Program Temperature
Setpoints
NOTE: The setpoint temperature range is 40 to
90°F (7 to 31°C) for heating and 45 to 99°F
(9 to 37°C) for cooling.
Press Occupied Temp.
M4970B
Heat
Setting
Occupied
Set Program
Set Program Set Temperature Change
Time/Temp
Occupied
Temp
Occupied
Temp Unoccupied
Start Time Day
System Fan
Copy
Occupied
Start Time
Run
Program
Temporary
Occupied
Continous
Unoccupied
Set Current
Day/Time Clear Start Time
Unoccupied
Temp
Heat/Cool
Settings
Press increase ▲ or decrease ▼ key until the
desired temperature is displayed.
M4971B
Set Program Set Temperature Change
Time/Temp
Occupied
Temp
Unoccupied
Start Time Day
System Fan
Copy
Occupied
Start Time
Run
Program
Temporary
Occupied
Continous
Unoccupied
Set Current
Day/Time Clear Start Time
Unoccupied
Temp
Heat/Cool
Settings
Heat
Setting
Occupied
Set Program

63-4356—1 12
Press Heat/Cool Settings to change between
heat and cool settings.
Cool
Occupied
Setting
M4972A
Set Program Set Temperature Change
Time/Temp
Occupied
Temp
Unoccupied
Start Time Day
System Fan
Copy
Occupied
Start Time
Run
Program
Temporary
Occupied
Continous
Unoccupied
Set Current
Day/Time Clear Start Time
Unoccupied
Temp
Heat/Cool
Settings
Heat/Cool
Settings
Set Program
Press increase ▲ or decrease ▼ key until the
desired temperature is displayed.
Cool
Setting
Occupied
M4973B
Set Program
Set Program Set Temperature Change
Time/Temp
Occupied
Temp
Unoccupied
Start Time Day
System Fan
Copy
Occupied
Start Time
Run
Program
Temporary
Occupied
Continous
Unoccupied
Set Current
Day/Time Clear Start Time
Unoccupied
Temp
Heat/Cool
Settings
Press Unoccupied Temp.
Heat
Setting
UnOccupied
M4974B
Set Program Set Temperature Change
Time/Temp
Occupied
Temp
Unoccupied
Start Time Day
System Fan
Copy
Occupied
Start Time
Run
Program
Temporary
Occupied
Continous
Unoccupied
Set Current
Day/Time Clear Start Time
Unoccupied
Temp
Unoccupied
Temp
Heat/Cool
Settings
Set Program
Press increase ▲ or decrease ▼ key until the
desired temperature is displayed.
Heat
Setting
UnOccupied
M4975B
Set Program
Set Program Set Temperature Change
Time/Temp
Occupied
Temp
Unoccupied
Start Time Day
System Fan
Copy
Occupied
Start Time
Run
Program
Temporary
Occupied
Continous
Unoccupied
Set Current
Day/Time Clear Start Time
Unoccupied
Temp
Heat/Cool
Settings

13 63-4356—1
Press Heat/Cool Settings to change between
heat and cool settings.
Un Cool
Setting
Occupied
M4976B
Set Program Set Temperature Change
Time/Temp
Occupied
Temp
Unoccupied
Start Time Day
System Fan
Copy
Occupied
Start Time
Run
Program
Temporary
Occupied
Continous
Unoccupied
Set Current
Day/Time Clear Start Time
Unoccupied
Temp
Heat/Cool
Settings
Heat/Cool
Settings
Set Program
Press increase ▲ or decrease ▼ key until the
desired temperature is displayed.
Un Cool
Setting
Occupied
M4977B
Set Program Set Temperature Change
Time/Temp
Occupied
Temp
Unoccupied
Start Time Day
System Fan
Copy
Occupied
Start Time
Run
Program
Temporary
Occupied
Continous
Unoccupied
Set Current
Day/Time Clear Start Time
Unoccupied
Temp
Heat/Cool
Settings
Set Program
Press Run Program.
M4954A
Set Program Set Temperature Change
Time/Temp
Occupied
Temp
Unoccupied
Start Time Day
System Fan
Copy
Occupied
Start Time
Run
Program
Temporary
Occupied
Continous
Unoccupied
Set Current
Day/Time Clear Start Time
Unoccupied
Temp
Heat/Cool
Settings
Auto
System Fan
Mon
Room
AM
Occupied 1
Heat
Run
Program
Clearing Program Start Times
Press Occupied Start Time or Unoccupied
Start Time until the start time to be cleared is
displayed.
AM
Occupied 1
Set Program Start Time
M4978A
Mon
Set Program Set Temperature Change
Time/Temp
Occupied
Temp
Unoccupied
Start Time Day
System Fan
Copy
Occupied
Start Time
Run
Program
Temporary
Occupied
Continous
Unoccupied
Set Current
Day/Time Clear Start Time
Unoccupied
Temp
Heat/Cool
Settings
Day
Press Day until the desired day is displayed.
AM
Mon
Occupied 1
Set Program
Start Time
M4955A
Set Program Set Temperature Change
Time/Temp
Occupied
Temp
Unoccupied
Start Time Day
System Fan
Copy
Occupied
Start Time
Run
Program
Temporary
Occupied
Continous
Unoccupied
Set Current
Day/Time Clear Start Time
Unoccupied
Temp
Heat/Cool
Settings
Occupied
Start Time

63-4356—1 14
Press Clear Start Time.
Occupied 1
Set Program Start Time
M4979B
Mon
Set Program Set Temperature Change
Time/Temp
Occupied
Temp
Unoccupied
Start Time Day
System Fan
Copy
Occupied
Start Time
Run
Program
Temporary
Occupied
Continous
Unoccupied
Set Current
Day/Time Clear Start Time
Unoccupied
Temp
Heat/Cool
Settings
Clear
Start Time
Repeat steps through for all the start
times to be cleared.
Press Run Program.
M4954A
Set Program Set Temperature Change
Time/Temp
Occupied
Temp
Unoccupied
Start Time Day
System Fan
Copy
Occupied
Start Time
Run
Program
Temporary
Occupied
Continous
Unoccupied
Set Current
Day/Time Clear Start Time
Unoccupied
Temp
Heat/Cool
Settings
Auto
System Fan
Mon
Room
AM
Occupied 1
Heat
Run
Program
Temporary Occupied Override
Setting Temperature Offset
for Temporary Override
Press Occupied Temp.
M10231
Heat
Set Program Set Temperature Change
Time/Temp
Occupied
Temp
Occupied
Temp
Unoccupied
Start Time Day
System Fan
Copy
Occupied
Start Time
Run
Program
Temporary
Occupied
Continous
Unoccupied
Set Current
Day/Time Clear Start Time
Unoccupied
Temp
Heat/Cool
Settings
Wed
Occupied
Setting
Press Temporary Occupied.
M4980A
Set Program Set Temperature Change
Time/Temp
Occupied
Temp
Unoccupied
Start Time Day
System Fan
Copy
Occupied
Start Time
Run
Program
Temporary
Occupied
Temporary
Occupied
Continous
Unoccupied
Set Current
Day/Time Clear Start Time
Unoccupied
Temp
Heat/Cool
Settings

15 63-4356—1
Press increase ▲ or decrease ▼ key until the
desired temperature offset is displayed (range
is 0°to 5°F).
M4981A
Set Program Set Temperature Change
Time/Temp
Occupied
Temp
Unoccupied
Start Time Day
System Fan
Copy
Occupied
Start Time
Run
Program
Temporary
Occupied
Continous
Unoccupied
Set Current
Day/Time Clear Start Time
Unoccupied
Temp
Heat/Cool
Settings
Press Run Program.
M4954A
Set Program Set Temperature Change
Time/Temp
Occupied
Temp
Unoccupied
Start Time Day
System Fan
Copy
Occupied
Start Time
Run
Program
Temporary
Occupied
Continous
Unoccupied
Set Current
Day/Time Clear Start Time
Unoccupied
Temp
Heat/Cool
Settings
Auto
System Fan
Mon
Room
AM
Occupied 1
Heat
Run
Program
Using Temporary Override
Press Temporary Occupied.
NOTE: The default temperature setting is the
Occupied setpoint.
Override
Setting
Heat
M4982B
Set Program Set Temperature Change
Time/Temp
Occupied
Temp
Unoccupied
Start Time Day
System Fan
Copy
Occupied
Start Time
Run
Program
Temporary
Occupied
Temporary
Occupied
Continous
Unoccupied
Set Current
Day/Time Clear Start Time
Unoccupied
Temp
Heat/Cool
Settings
Press increase ▲ or decrease ▼ key to
change the default setting by the offset (range
is 0°to 5°F), if desired.

63-4356—1 16
NOTE: If the offset is zero, the default
setting changes in one degree incre-
ments. If the offset is 1 through 5, the
default setting changes by plus or
minus the offset.
Auto
System Fan
Auto
AM
Wed Override
Temporary
Room
M4983B
Set Program Set Temperature Change
Time/Temp
Occupied
Temp
Unoccupied
Start Time Day
System Fan
Copy
Occupied
Start Time
Run
Program
Temporary
Occupied
Continous
Unoccupied
Set Current
Day/Time Clear Start Time
Unoccupied
Temp
Heat/Cool
Settings
Press Run Program to cancel the override.
M4954A
Set Program Set Temperature Change
Time/Temp
Occupied
Temp
Unoccupied
Start Time Day
System Fan
Copy
Occupied
Start Time
Run
Program
Temporary
Occupied
Continous
Unoccupied
Set Current
Day/Time Clear Start Time
Unoccupied
Temp
Heat/Cool
Settings
Auto
System Fan
Mon
Room
AM
Occupied 1
Heat
Run
Program
Using Continuous Unoccupied
Press Continuous Unoccupied.
NOTE: The default temperature setting is the
Unoccupied setpoint. The default
appears for five seconds and then the
display shows the room temperature.
M4984B
Set Program Set Temperature Change
Time/Temp
Occupied
Temp
Unoccupied
Start Time Day
System Fan
Copy
Occupied
Start Time
Run
Program
Temporary
Occupied
Continous
Unoccupied
Continuous
Unoccupied Set Current
Day/Time Clear Start Time
Unoccupied
Temp
Heat/Cool
Settings
Heat
Setting
Press increase ▲ or decrease ▼ key to
change the default setting, if desired.
M10232A
Set Program Set Temperature Change
Time/Temp
Occupied
Temp
Unoccupied
Start Time Day
System Fan
Copy
Occupied
Start Time
Run
Program
Temporary
Occupied
Continous
Unoccupied
Set Current
Day/Time Clear Start Time
Unoccupied
Temp
Heat/Cool
Settings
Heat
Setting

17 63-4356—1
Press Heat/Cool Setpoint to change between
heat and cool settings. Use increase ▲ or
decrease ▼ key to adjust temperature settings.
Press Run Program again to cancel the Hold
and to return to the program.
M4954A
Set Program Set Temperature Change
Time/Temp
Occupied
Temp
Unoccupied
Start Time Day
System Fan
Copy
Occupied
Start Time
Run
Program
Temporary
Occupied
Continous
Unoccupied
Set Current
Day/Time Clear Start Time
Unoccupied
Temp
Heat/Cool
Settings
Auto
System Fan
Mon
Room
AM
Occupied 1
Heat
Run
Program
Changing Temperature Setpoint Until
Next Program Period
Press increase ▲ or decrease ▼ key until the
desired temperature is displayed.
NOTE: If ▼or ▲appear under the tempera-
ture display, it means that both the
heating and cooling setpoints are being
adjusted. Tapping the key will change
both the heat and cool setpoints by
one degree. Press Heat/Cool Settings
after the desired setpoint is reached to
review the settings.
M4987B
Set Program Set Temperature Change
Time/Temp
Occupied
Temp
Unoccupied
Start Time Day
System Fan
Copy
Occupied
Start Time
Run
Program
Temporary
Occupied
Continous
Unoccupied
Set Current
Day/Time Clear Start Time
Unoccupied
Temp
Heat/Cool
Settings
Heat
Temporary Setting
Occupied
Press Run Program to cancel the temporary
setpoint and to return to the program.
M4954A
Set Program Set Temperature Change
Time/Temp
Occupied
Temp
Unoccupied
Start Time Day
System Fan
Copy
Occupied
Start Time
Run
Program
Temporary
Occupied
Continous
Unoccupied
Set Current
Day/Time Clear Start Time
Unoccupied
Temp
Heat/Cool
Settings
Auto
System Fan
Mon
Room
AM
Occupied 1
Heat
Run
Program

63-4356—1 18
TROUBLESHOOTING GUIDE
Symptom Action
Display will not come on. • Check if the circuit breaker is tripped—reset the circuit breaker.
• Check if the fuse is blown—replace the fuse.
• Check if the system switch at the equipment is in the Off position—
set to the On position.
• Check wiring between thermostat and HVAC equipment—replace
any broken wires.
• If 24 Vac is present, proceed with troubleshooting.
Temperature settings will not
change (Example: cannot set
the heating higher or the
cooling lower).
• Check that the temperature setpoints are:
- heating: 40 to 90°F (7 to 31°C)
- cooling: 45 to 99°F (9 to 37°C).
• Keyboard is locked. Contact the installer.
Heating will not come on. • Check if the circuit breaker is tripped—reset the circuit breaker.
• Check if the fuse is blown—replace the fuse.
• Check if the system switch at the equipment is in the Off position—
set to On position.
• If 24 Vac is present, proceed with troubleshooting.
• Wait five minutes for the system to respond.
• Set system selection to Heat.
(Continued)

19 63-4356—1
TROUBLESHOOTING GUIDE (Continued)
Symptom Action
Cooling will not come on. • Check if the circuit breaker is tripped—reset the circuit breaker.
• Check if the fuse is blown—replace the fuse.
• Check if the system switch at the equipment is in the Off position—
set to On position.
• If 24 Vac is present, proceed with troubleshooting.
• Wait five minutes for the system to respond.
• Set system selection to Cool.
System on indicator
(flame=heat, snowflake=cool)
is displayed, but no warm or
cool air is coming from the
registers.
Wait a minute after seeing the flame or snowflake and then check the
registers.

63-4356—1 20
Honeywell Limited-Honeywell Limitée
35 Dynamic Drive
Scarborough, Ontario M1V 4Z9
Automation and Control Solutions
Honeywell International Inc.
1985 Douglas Drive North
Golden Valley, MN 55422-4386
63-4356—1 J.H. Rev. 12-96 20 www.honeywell.com/buliding/components