Page 1
User manual
Control
OLT-1X
Providing indoor climate comfort
MUL30E-0303 09-2006
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CONTENTS
PAGE
TERMINAL-THERMOSTAT INSTALLATION AND UNIT CONFIGURATION
USER INTERFACE DESCRIPTION
SELECTING UNIT OPERATING MODE AND SET-POINT
PROGRAMMING ADJUSTMENT
ALARM CODES
UNIT PROTECTION DEVICES
1
2
3-4
5
6
6
Your new LENNOX Thermostat has been designed to provide accurate control and display of room temperature. In
addition, it will also display all relevant information pertaining to your system.
The clearly marked buttons and informative display make it extremely easy to understand and simple to use.
Please take a few moments to read the brief instructions and familiarise yourself with the various functions in order to obtain
maximum benefit from this truly unique electronic control.
This electronic control is organised into two integrated systems: a terminal, installed in the room, and a power board for managing
the actuators in the electrical panel. The terminal is connected to the power board using a four-lead cable, thus greatly simplifying
installation, with shield cable (supplied with the unit)
IMPORTANT
Prior of making the electrical connections, set the switch for heat pump unit or for cooling
only unit.
.
NOT USED FOR CASSETTE UNITS. (See documentation for the unit)
COOLING ONLY
This unit is valid for operating as a cold only or heat pump
application. The unit should be configured prior to making the
electrical connections, by setting the configuration switch as
follows:
J_MODE
P.C.B.
(factory setting)
J_MODE
HEAT PUMP
J_MODE
TERMINAL-THERMOSTAT INSTALLATION
For correct installation the following warnings must be heeded:
Always disconnect the power supply before performing any operations on the board during assembly, maintenance or
replacement.
The terminal should be fastened to the wall vertically, allowing for air to circulate through the instrument's vent-holes, in order
to detect the correct ambient temperature
Avoid places where the measurement of the ambient temperature by the internal sensor may be altered, such as outside walls,
near doors leading outside, in direct sunlight, etc.
INSTALLATION GUIDE FOR CONTROL CABLE (TO AVOID INTERFERENCES):
Use the screened 15 m cable supplied with terminal (3 wires + screen).
Wire the cable separated from electrical power wiring by a physical distance of 500 mm.
Wire the cable separated from halogen lamps/fluorescent tube lighting... by a physical distance of 500 mm.
Wire the cable separated from radio frequency sources such as radio transmitter... at least 500 mm.
NEVER WIND THE REMAINING CABLE AROUND, CUT THE CABLE BY THE TERMINAL END.
TERMINAL INSTALLATION
The installation procedure is as following:
1º To detach the front panel of the terminal from the rear shell,
insert a flat-head screwdriver in the slot in the centre of the bottom
of the box and release the locking flap.
2º Raise the front panel using a hinge movement, using the
upper edge of the instrument as the pivot and raising the lower
edge.
3º To fasten the rear part of the box to the wall, use the mounting
holes on the shell.
4º Connect the cables to the
terminals on the electrical box, as
indicated in electrical diagram.
AUTO
KEY LOCK
AUTODRY COOL
COOL
MON TUE WED THU FRI SAT SUN
TEMP.
HEAT
TEMP.
ROOM
TIMER ACTIVE SET TIMER SET CLOCK
TEMP.
SLEEP MODE
FAN
SWING ON TIMER OFF TIMER
CLOCK
DAY
HOLD
SLEEP
SWING
HEATFAN
SET TEMP
HOUR
Cable supplied with
the unit Maximum
ON / OFF
length allowed is
15m
MINUTE
1
F
F
O
/
N
O
2
Sub-base
FF
N / O
O
Terminal-Thermostat
UNIT
Power board
5º Finally, close the instrument, moving the front panel onto the rear shell with a hinge movement, in the opposite way as used
for opening. First the long side of the front panel near the display is snapped onto the rear shell, then the opposite side, being
careful that the terminal pins slide into their corresponding female terminals.
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USER INTERFACE DESCRIPTION
Key Lock Display
Display indicates when key
lock function is activated.
Current Time
Display
Display the current
time
Start / Stop
Time Display
Display the start and
stop time
programmed.
Indicates that a
programming is
setting
Fan Speed Display
Displays the fan speed
setting.
(Auto/High/Medium/Low)
Alarm
indicator
KEY LOCK
MON TUE WED THU FRI SAT SUN
AUTO
SET TIMERTIMER ACTIVE
SET CLOCK
Operation Mode
Display
Displays the current
mode of operation.
SLEEP
SWING
FANHEAT
COOLAUTODRY
ROOM
TEMP.
ON / OFF
Sleep Display
Display the sleep / energy
saving status.
Swing Display
Display the air swing status,
(if incorporated on the unit)
°C or °F Display
Display the temperature
in °C or °F.
Set Temperature
or Room
Temperature Display
Display the set or
room temperature.
On/Off Status Lamp Display
Indicates we are setting the clock
Sleep button
Press SLEEP button to
activate the sleep or energy
saving mode.
Swing button
Press SWING button to
activate the air sweep
function.
Hold button
To resume the timer
setting after the timer
has been placed on
hold
Clock
To adjust the actual
real time
Day button
When the control is in set
clock or set timer mode,
pressing the DAY button will
change the set day.
Fan button
Press FAN button to
select Auto, High,
Medium or Low fan
SLEEP
SWING
HOLD
CLOCK
FAN
ON TIMER
DAY
MODE
OFF TIMER
speed.
SET TEMP
MINUTEHOUR
ON TIMER/OFF TIMER button
Used to adjust an ON/OFF TIMER to the
unit
Mode button
Press MODE button to
select operation mode from Cool, Heat,
Auto, Dry and Fan.
Temperature button
Pressing them the display
shows the set point or the
room temperature, and with
them we can select the
desired temperature (setpoint)
Minute button
When the control is in set clock
or set timer mode, pressing the
MINUTE button will change the
set minute.
Hour button
When the control is in set clock
or set timer mode, pressing the
HOUR button will change the set
hour.
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SELECTING UNIT OPERATING MODE AND SET-POINT TEMPERATURE
A ) HOW TO TURN ON/OFF THE UNIT
Operating Lamp
On / Off
AUTO
KEY
LOCK
MON TUE WED THU FRI SAT
SUN
SET TIMER
TIMER ACTIVE
SET CLOCK
SLEEP
SWING
HEAT
AUTO
COOL
FAN
DRY
COOL
TEMP.
HEAT
TEMP.
ROOM
TEMP.
ON / OFF
Starting operation:
When the unit is off, press the ON/OFF button. The operation
LED lights and the unit will be turned on.
Stopping operation:
When the unit is on, press the ON/OFF button. The operation
LED is extinguished and controls are turned off.
B) SELECTING THE UNIT'S OPERATING MODE
The operating mode is always indicated on the display
Pressing the mode button repeatedly you can change the unit operating mode, and choose the one desired:
Cool DryHeat FanAuto
COOL: The unit is working on cooling mode, when compressor is working symbol will appear on the display
HEAT: The unit is working on heating mode, when compressor or electrical heater is working symbol will appear
on the display
AUTO: The system automatically switches from cooling to heating mode, depending on the position of the ambient
temperature in respect to the set-point, the symbol will appear on the display and also the symbols or
depends on the operating mode selected
DRY: The symbol will appear on the display
FAN: Fan control only; when fan is working the symbol will appear
C) SELECTING DESIRED ROOM TEMPERATURE (SET-POINT)
If unit is working, the or buttons allow to select the desired room temperature (set-point)
When the button or are pressed one, the display will show the selected desired
SET TEMP
SET TEMP
temperature (set-point) during 5 seconds, after that the display will show the room temperature
The button allow the increase of the current set-point by 1ºC/1ºF
SET TEMP
The button allow the decrease of the current set-point by 1ºC/1ºF
The temperature range is from 16ºC/60ºF to 30ºC/85ºF
To change from ºC to ºF or vice versa, press the buttons y at the same time
SET TEMP
NOTE: If we have selected FAN as the unit operating mode, the SET POINT can not be modified
D) SELECTING THE FAN OPERATING MODE
To be able to select a fan operating mode, cool, heat or auto unit's operating mode must be selected.
If DRY mode have been selected the fan operating mode can not be selected.
If Fan mode have been selected the automatic fan operating mode can not be selected
HIGH
Pressing button scrolls through the
FAN
MEDIUM
following modes, and we can selected
the one desired
LOW
AUTO
AUTOMATIC: The fan selects the most appropriated fan speed
NOTE: Even when a low speed have been selected on heating mode, the unit self protective changing automatically
to a higher fan speed, when the unit is working at high temperatures.
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SETTING THE TIMER
Our electronic climate control with timer operation is a programmable terminal.
With this terminal you can program the unit to stop and start on each of the 7 days of the week.
The ON TIMER and OFF TIMER functions may be combined.
To set the timer, follow the instructions given below:
PROGRAMMING THE UNIT TO START
(ON TIMER)
Press the button.
The and symbols
1
will flash on the screen.
With the
day of the week that you wish
2
to program. Any previous
ON TIMER
SET TIMER
button, select the
DAY
settings will be displayed.
With the and buttons,
enter the exact time at which you
3
HOUR
wish the unit to start. The
MINUTE
TIMER ACTIVE
symbol will flash.
Push the button to finish the
DAY
programming for that day and to
program a different day.
Mo (Monday)
Tu (Tuesday)
We (Wednesday)
Th (Thursday)
Fr (Friday)
Sa (Saturday)
Su (Sunday)
PROGRAMMING THE UNIT TO STOP
(OFF TIMER)
Press the button.
The and symbols
1
will flash on the screen.
With the button, select the
day of the week that you wish
2
to program. Any previous
OFF TIMER
SET TIMER
DAY
settings will be displayed.
With the and buttons,
enter the exact time at which you
3
HOUR
wish the unit to stop. The
MINUTE
TIMER ACTIVE
symbol will flash.
Push the button to finish the
DAY
programming for that day and to
program a different day.
4
4
Push or wait 15 seconds
ON TIMER
for the programming to be
accepted, after which the
symbol will remain visible and
the clock will show the real time.
TIMER ACTIVE
Push or wait 15 seconds
OFF TIMER
for the programming to be
accepted, after which the
TIMER ACTIVE
symbol will remain visible and
the clock will show the real time.
With the ON TIMER function, the unit will automatically
start at the selected time, in the same operating mode
as when it was switched off.
NOTE:
TIMER ACTIVE
If the symbol does not remain visible on the screen, the control has not stored the settings.
HOW TO DEACTIVATE THE ON TIMER / OFF TIMER FUNCTION
To deactivate the settings and store them for future use:
Press the button for 3 seconds, until the indication disappears.
To activate them once again,
HOLD
press the button for 3 seconds once again, until the indication appears
HOLD
TIMER ACTIVE
TIMER ACTIVE
HOW TO DELETE THE ON TIMER / OFF TIMER FUNCTION
Push the button.
Push the button and select the day of the week that you wish to delete from the settings.
Push the button as many times as necessary until - : - - appears, showing that the setting for that day has
ON TIMER
DAY
HOUR
been deleted.
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OPERATING
HOUR ADJUSTMENT
Press button once to set the clock mode, the indication will appear on the display blinking
Press button repeatedly, scrolls through the following days of the week, and we can selected the one desired
Press button to set the hour
Press button to set the minutes
Press button to accept
CLOCK
DAY
HOUR
MINUTE
CLOCK
SET CLOCK
MON TUE WED THU FRI SAT SUN
The unit is supplied with a lithium battery acting as a power back up in the case of a power failure. The real time
clock and other settings are maintained during the power failure and reset when power is restored.
SLEEP
Pressing the button , we activate this function. It is registered on the display with the symbol
SLEEP
COOLING MODE
ºC
Set Point+2ºC
Set Point+1ºC
Set Point+0.5ºC
Set Point
0.5 1 2
HOURS
SLEEP FUNCTION ON
Increase the set point temperature as the above drawing
shows
HEATING MODE
Set Point
Set Point - 0.5ºC
Set Point - 1ºC
Set Point - 2ºC
0.5 1 2
ºC
SLEEP FUNCTION ON
Decrease the set point temperature as the above drawing
shows
SLEEP
HOURS
FUNCTION SWING
Press button , the function swing gets activated, the symbol will appear on the LCD display
SWING
SWING
KEY LOCK
This feature protects the controls from being tampered with by children or unauthorized persons.
To activate, press the button three times consecutively, symbol will appear on the LCD display.
During this time, only button can be used.
To cancel this feature, press the button again three times consecutively. and the indication will
MINUTE
ON / OFF
MINUTE
disappear on the display
KEY LOCK
KEY LOCK
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ALARM CODES
The unit self-protect through safety devices, when any of these safety devices detect an
anomaly, shown in the display in order to advise the installer.
The activation of an alarm brings about:
- The display of the alarm code on the display.
- The blocking of some or all the outputs, depending on the type of alarm.
VIS (Visualization): Indicates the type of alarm shown on the display.
RE (Reset): Type of reset:
AUT: AUTOMATIC RESET: Some alarms are automatically reset, when the cause is no longer present, they disappear
from the display.
MAN: MANUAL RESET: Press "ON/OFF" button.
VIS. RE
DESCRIPTION
Ambient temperature regulation
probe error.
Indoor coil temperature
probe error.
Compressor overload.
During heating cycle the indoor
coil temperature has been too
high.
Overflow of water condensing.
The float switch has detected
water overflow.
Short circuited temperature
probe.
Temperature probe open. Check probe connection.
EFFECTS ACTION
Unit will
stop
Compressor
will stop
Compressor
will stop
Compressor
will stop.
Condensate
pump working.
Unit will stop
Unit will stop
Check connections between unit and thermostat.
Check connections of indoor coil temperature probe.
These protections are automatic reset for the first time. To
reset for second time press button "ON/OFF" until alarm
disappears.
If the alarm shows up again, check:
Connections of indoor coil temperature probe.
Indoor unit works properly.
Clean air filters.
These protections are automatic reset, the alarm resets
automatically when there is no more water.
If the alarm shows again, check the water drain, and the
connections of float switch.
Check probe connection.
WARNINGS
DESCRIPTIONVIS. EFFECTS
AUT
AUT
AUT/
MAN
AUT
AUT
AUT
Probe temperature lower than 8ºC.
Probe temperature higher than 37ºC.
The unit is working, and the warning disappears when temperature is
between 8ºC and 37ºC.
UNIT PROTECTION DEVICES
AGAINST FREQUENT COMPRESSOR CYCLING
When COOL/HEAT/AUTOMATIC is selected, the start up of the unit will be delayed for 3 minutes, to protect the
unit against frequent compressor cycling.
AIR PREHEATING
On heat mode, the indoor unit fan will not start or will start at low speed, to prevent from air cool feeling, until the
indoor unit temperature reaches the set temperature then the unit will operate to the selected temperature.
DEFROST CYCLE
When the unit is operating on heating mode, the unit will do defrost to eliminate the ice that will produce the
outdoor unit; on this cycle, the indoor unit fan switches off.
AUTO RESTART
If power failure occurs during operation, the unit will start in the same operation mode as before after power
recovery.
FREEZE-UP PROTECTION
If the unit is operating on cooling only mode, and the indoor unit coil temperature is below a set value, the unit
stops.
DETECTING BROKEN SENSOR
If the control system detects a sensor reading out of permissible deviation, the unit stops.
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Due to Lennox’s ongoing commitment to quality,
the Specifications, Ratings and Dimensions are
subject to change without notice and without
incurring liability.
Improper installation, adjustment, alteration,
service or maintenance can cause property
damage or personal injury.
Installation and service must be performed by a
qualified installer and servicing agency.
PORTUGAL
www.lennoxportugal.com
MUL30E-0303 09-2006
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