Service Indicator; Thermostat Reset; Removing/Installing Thermostat; Default Thermostat Settings - Lennox ComfortSense 3000 Series Operation Manual

Service Indicator

When abnormal equipment operation is detected, the
SERVICE indicator will flash on the screen (see figure 17).
This indicates that the equipment requires service from a
qualified service technician.
Figure 17. Service Indicator Flashing

Thermostat RESET

Under some abnormal conditions, it may be necessary
to "reset" the thermostat to its default condition. Such a
RESET would delete all programming and settings and
therefore should only be used on rare occasions when
the thermostat fails to function as designed and/or as
programmed. Such an instance can occur as a result of a
power surge or similar electrical disturbance (e.g. after an
electrical storm or power outage). The RESET button can
be used to recover from this situation.
CAUTION
When the RESET button is pressed, ALL settings revert
back to the defaults, including the default program (see
tables 2 and 3).
The RESET button is an unlabeled, recessed button located
behind the door on the right-hand side of the thermostat,
below the SETTINGS button (see figure 3). Use a paper clip
or small pencil to press the RESET button; ALL thermostat
settings will be reset to the defaults listed in the Default
Thermostat Settings section.

Removing/Installing Thermostat

The thermostat hinges on tabs on the top of the subbase; no
tool is needed to remove the thermostat from the subbase.
Pivot the bottom of the thermostat outward (releasing he
snaps), then lift up to remove.
To replace it, first position the top tilted toward the wall
bracket and align it until you feel the tabs and slots engage;
then, while the top is in place, pivot the bottom toward the
wall until the thermostat snaps into place.

Default Thermostat Settings

Default thermostat settings are in table 2 and the default
program is shown in table 3.
Table 2. Default Thermostat Settings
Mode
Setpoint
Fan
Filter Reminder
Maintenance Reminder
Equipment Protection Timers
Table 3. Default Program Settings
Programs Time
Weekday - A 6:00am
Weekday - B 8:00am
Weekday - C 6:00pm
Weekday - D 10:00om
Weekday - A 6:00am
Weekday -B 8:00am
Weekday - C 6:00pm
Weekday - D 10:00om
Weekday
Weekend

Technical Specifications

Thermostat Type
Electronic programmable thermostat for 1-StageHeat/
1-Stage Cool, gas or electric heat, non-heat pump, non-
power robbing applications.
Power Supply Range
18VAC - 30VAC (24VAC nominal), 60Hz
24VAC is present on the terminals of the thermostat
bracket. If removing the thermostat from the wall, use
caution and avoid touching any of the connector terminals
on the wall bracket.
Also, when working with the thermostat dip switches, use
a non-conductive tool and take caution to avoid making
any contact with the circuit board, its imprinted circuitry
and its connector prongs.
Temperature Display
Display Scale: Fahrenheit or Celsius user selectable (via
DIP switch; see figure 18)
Display range: 35°F (2°C) to 99°F (37°C)
Display resolution: 1°F (1°C)
Display Accuracy: +/-1°F
If the Fahrenheit/Celsius display must be changed, use a
plastic, non-conductive tool to push the dip switch to the
right position (see figure 18).
6
Heat (Permanent Hold)
70°F (or 21°C)
Auto
OFF
OFF
Reset Back to Zero
Temp (Heat)
70F / 21°C
62F / 17°C
70F / 21°C
62F / 17°C
70F / 21°C
62F / 17°C
70F / 21°C
62F / 17°C
Monday, Tuesday, Wednesday,
Thursday, Friday
Saturday, Sunday
CAUTION
Temp (Cool)
78F / 26°C
85F / 29°C
78F / 26°C
82F / 28°C
78F / 26°C
85F / 29°C
78F / 26°C
82F / 28°C