OJ Electronics MCD3-1999 User manual
WWW.OJELECTRONICS.COM
© 2022 OJ Electronics A/S
MCD3-1999
User Manual
67869A 03/22 (MTE)
PAGE 2
© 2022 OJ Electronics A/S
Table of contents
Table of contents . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Menu overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Icons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Buttons and navigation . . . . . . . . . . . . . . . . . . . . . . . 6
Adjust the heating schedule . . . . . . . . . . . . . . . . . . . . 7
Override the heating schedule . . . . . . . . . . . . . . . . . . . 8
Child Lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Factory reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Time settings (cLc). . . . . . . . . . . . . . . . . . . . . . .11
Day settings (dAy). . . . . . . . . . . . . . . . . . . . 12
Schedule and events (5chE). . . . . . . . . . . . . . . . . .13
Display settings (Lcd). . . . . . . . . . . . . . . . . . . . . .14
Remote Control (rCt). . . . . . . . . . . . . . . . . . . . . .15
Open Window (OPEn). . . . . . . . . . . . . . . . . . 16
Adaptive start (AdAP). . . . . . . . . . . . . . . . . . 17
Adjust (AdJ). . . . . . . . . . . . . . . . . . . . . . . 18
Software version (-5U). . . . . . . . . . . . . . . . . . 19
Temperature readout (-FtP,-rtP). . . . . . . . . . . . 20
Power limit (P Li ) 1/2 . . . . . . . . . . . . . . . . . . . . . . .21
Power limit (P Li ) 2/2 . . . . . . . . . . . . . . . . . . . . . . .22
Pulse width modulation (PuL5) 1/2 . . . . . . . . . . . . . . .23
Pulse width modulation (PuL5) 2/2 . . . . . . . . . . . . . . .24
Floor temperature limits (FLLo,FLHi). . . . . . . . . . . . .25
Temperature limits (tLLo,tLhi). . . . . . . . . . . . . . . .26
Sensor application (APP). . . . . . . . . . . . . . . . . . . .27
Exiting the menu (donE). . . . . . . . . . . . . . . . . . . . .28
Change of front cover . . . . . . . . . . . . . . . . . . . . . . . .29
Troubleshooting and additional information. . . . . . . . . . . .30
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© 2022 OJ Electronics A/S
Introduction
Thank you for buying our MCD3 thermostat.
We hope you will enjoy the ease of use oered by
the well-known user interface and design.
This high-quality thermostat has a minimum impact on
the environment by design and will at the same time
provide you with long-lasting heating comfort.
The thermostat switches on your floor heating
at preset times each day of the week.
The thermostat is preset with up to four events for
each day of the week. Lowering the temperature
when your home is unoccupied reduces your
energy costs without reducing comfort.
The thermostat comes with preset heating
schedules adjustable to your specific needs.
A temperature setting range from 0°C to 40°C and an
external override function ensures your comfort and
protects your property.
This thermostat can be used as a controller for electric
room heating pursuant to EN50559.
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© 2022 OJ Electronics A/S
Menu overview
Settings Options
CLc (Clock) 00:00 - 23:59
dAY (Day) Mon, TuE, WEd, tHu,
Fri, SAt, Sun
5chE (Schedule) 5-2, 6-1, 1E2, 1E4, 7E4
Lcd1 (Lcd) Set, cLc, --
Lcd2 (Lcd) Set, tP
rCt(Remote
controlled temp.) 5..25°C
OPEn (Open window) On/O
AdAP (Adaptive start) On/O
Adj (Adjust) -9.9..10°C
-5U (Software Version) Readout value
-FtP (Floor temp.) Readout value
-RtP (Room temp.) Readout value
PLi (Power Limit) 0..30
Settings Options
PuL5
(Pulse Width
Modulation)
Aut CYHi: 10..60
CYLo: 10..30
O DiFF: 0.3..10°C
On CYcL: 10..60
FLLo (Floor limit low) 0..40°C
FLHi(Floor limit high) 0..40°C
tLLo (Temp. limit low) 0..40°C
tLHi(Temp. limit high) 0..40°C
APP
(sensor application)
RRoom
FFloor
CRegulator
RF Room w. floor
limits
RE External room
sensor
donE (Done)
Entry
point for
initial
setup
Entry
point for
daily use
settings
Settings for daily use
Settings for installation
Read out values
M
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© 2022 OJ Electronics A/S
Icons
Icon Meaning Icon Meaning
Schedule operation
Open window
Heating is activated
Child lock is engaged
Manual mode
Temperature scale, Celsius
The thermostat is in regulator
mode APP: C
Setpoint
Remote Control
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© 2022 OJ Electronics A/S
Buttons and navigation
Buttons and navigation
The front cover can be flipped down.
The on/o switch is located behind the front cover, on the
left side of the front, up = on / down = o.
On the right there are three buttons: A top button ””, a
middle button ” ”and a bottom button ””.
””: The middle button is used to acess the menu and
confirm changes and settings made in the menu.
”” and ””: The up and down buttons are used to
navigate through the menu and change parameters and
settings.
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© 2022 OJ Electronics A/S
Example of a 4-event schedule:
Event 1: From 06:00 to 09:00 the thermostat will maintain a
temperature of 25°.
Event 2: From 09:00 to 16:00 the thermostat will maintain a
temperature of 22°.
Event 3: From 16:00 to 23:00 the thermostat will maintain a
temperature of 23°
Event 4: During the night (From 23:00 to 06:00), a temperature
of 20° is maintained.
00:00 06:00 09:00 16:00 23:00
20°
25° 23°
22°
20°
2 431
Adjust the heating schedule
You can adjust the preset schedule to your own needs, by
adjusting the time and setpoint temperature. To change
the heating schedule, see page 13.
Menu structure:
5chE: 5-2, 6-1, 1E4, 7E4, 1E2
REMOTE
Changing the time and setpoint in an event:
• Press ”” and ”” for 3 seconds to enter schedule
and event settings.
• You can now change the time and temperature
setpoint for event 1 in the chosen schedule.
• Use ”” and ”” to change the time and confirm
with ” ”.
• Use ”” and ”” to change the temperature setpoint
and return with ” ”.
Note: Step 3 and 4 will be repeated either 2 or 4 times
for each day, depending on the number of events in the
chosen schedule (see previous page)
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© 2022 OJ Electronics A/S
Override the heating schedule
REMOTE
Override heating schedule
Temporary override:During scheduled operation, you
can either use ”” or ”” to override the programmed
setpoint/temperature. This override will hold until next
scheduled event.
During temporary override, a clock ” ”and manual
mode ” ”symbol are shown on the dispay.
Permanet override:Press the ” ”one time to activate
manual override. The thermostat is now in manual
operation and the setpoint temperature can be adjusted
with ”” or ””.
Press ” ” again to exit manual mode and continue with
scheduled operation. During manual mode override, the
manual mode symbol ” ”is shown on the display.
REMOTE
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© 2022 OJ Electronics A/S
Child Lock
REMOTE
Child Lock
The child lock can be activated directly if the thermostat
is idle, or if the thermostat‘s backlight is activated, but
never from within the menu.
• Activate the child lock by pressing ””and ””
simultaneously for 8 seconds, until the padlock ” ”
icon is shown on the display.
• The padlock icon indicates that the childlock is
activated.
• Deactivate the child lock by pressing ”” and ””
simultaneously for 8 seconds, until the padlock icon is
no longer shown in the display.
PAGE 10
© 2022 OJ Electronics A/S
Factory reset
REMOTE
Factory reset
• Activate the thermostat by pressing any of the three
buttons. The backlight will be lit.
• Press ” ” for 8 seconds until the factory reset menu
appears.
Note: After 3 seconds the thermostat will enter the
settings - Keep pressing ” ”for additional 5 seconds.
• Use ””or ”” to navigate through the options and
confirm with ” ” .
no: The thermostat will not perform a factory reset.
SchE: The thermostat will return all schedule and event
settings to default.
ALL: All settings in the thermostat will be factory
reset.
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