6
TROUBLESHOOTING
Reset Operation
If a voltage spike or static discharge blanks out the display or causes erratic thermostat operation you can reset the thermostat
by pressing the reset button (see fig.1) . If the thermostat has power, has been reset and still does not function correctly contact
your heating/cooling service person or place of purchase.
Symptom
Possible Cause
Corrective Action
No Heat/No Cool/No Fan
(common problems)
Blown fuse or tripped circuit breaker.
1.
Furnace power switch to OFF.
2.
Furnace blower compartment door or panel
3.
loose or not properly installed.
Replace fuse or reset breaker.
Turn switch to ON.
Replace door panel in proper position to engage safety interlock or
door switch.
No Heat
System Switch not set to Heat.
1.
Loose connection to thermostat or system.
2.
Heating System requires service or
3.
thermostat requires replacement.
Set System Switch to Heat and raise setpoint above room
temperature.
Verify thermostat and system wires are securely attached.
Diagnostic: Set System Switch to Heat and raise the setpoint
above room temperature. Within five minutes the thermostat
should make a soft click sound. This sound usually indicates the
thermostat is operating properly. If the thermostat does not click,
try the reset operation listed above. If the thermostat does not click
after being reset contact your heating and cooling service person
or place of purchase for a replacement. If the thermostat clicks,
contact the furnace manufacturer or a service person to verify the
heating system is operating properly.
No Cool
System Switch not set to Cool.
1.
Loose connection to thermostat or system.
2.
Cooling System requires service or
3.
thermostat requires replacement.
Set System Switch to Cool and lower setpoint below room
temperature.
Verify thermostat and system wires are securely attached.
Same procedure as diagnostic for No Heat condition except set
the thermostat to Cool and lower the setpoint below the room
temperature. There may be up to a five minute delay before the
thermostat clicks in Cooling if the compressor lock-out option is
selected in the configuration menu (Item 6).
Heat, Cool or Fan
Runs Constantly
Possible short in wiring.
1.
Possible short in thermostat.
2.
Possible short in Heat/Cool/Fan system.
3.
Fan Switch set to Fan On.
4.
Check each wire connection to verify they are not shorted or
touching together. No bare wire should stick out from under
terminal screws. Try resetting the thermostat as described above. If
the condition persists, the manufacturer of your system or service
person can instruct you on how to test the Heat/Cool system for
correct operation. If the system operates correctly, replace the
thermostat.
Furnace Cycles Too Fast
or Too Slow
(narrow or wide
temperature swing)
The location of the thermostat and/or
1.
the size of the Heating System may be
influencing the cycle rate.
Item 2 in the Configuration Menu is the adjustment that controls
the cycle rate. If an acceptable cycle rate is not achieved using the
FA (Fast) or SL (Slow) adjustment contact a local service person
for additional suggestions.
Cooling Cycles Too
Fast or Too Slow
(narrow or wide
temperature swing)
The location of the thermostat and/or
1.
the size of the Cooling System may be
influencing the cycle rate.
The cycle rate for cooling is fixed and can not be adjusted. Contact
a local service person for suggestions.
Thermostat Setting and
Thermometer Disagree
Thermostat thermometer setting requires
1.
adjustment.
The thermometer can be ad/- 4 degrees as listed in item 7
of the Configuration Menu. No other adjustment is possible.
Blank Display and/or
Keypad Not Responding
Loss of power.
1.
Voltage Spike or Static Discharge.
2.
Check heat/cool system for power.
If a voltage spike or static discharge occurs use the Reset
Operation listed above.
OPERATING FEATURES
Now that you are familiar with the thermostat buttons and display,
read the following information to learn about the many features
of the thermostat.
•
SIMULTANEOUS HEATING/COOLING SETPOINT STOR-
AGE
— You can enter both your heating and cooling set-
points at the same time. There is no need to change the
thermostat at the beginning of each season.
•
CONFIGURATION MENU — Allows you to customize
certain thermostat options.
OPERATION
SETTING THE THERMOSTAT
This thermostat is very easy to operate. Set the SYSTEM
switch to either HEAT or COOL then press
and
until
the temperature you want to maintain is shown on the right side
of the display. If you want to turn the system off, just move the
SYSTEM switch to OFF.
The FAN switch controls the fan operation. When the FAN
switch is set to AUTO, the fan will cycle with the furnace or air
conditioner. When the FAN switch is set to ON, the fan will run
continuously, regardless of SYSTEM switch position.
Summary of Contents for 1F89-211
Page 7: ...7 NOTES...