Enters function selection.
6.3. Basic operations
6.3.3. Functions lockdown
The use of the functions lockdown brings greater security to the operation of the instrument. When it is
active, the setpoint and other parameters can be visible to the user, but are protected against undue
changes (F35=2) or you can block changes of control functions and leave the adjustment of the setpoint
enabled (F35=1).
Using the key
;
(short touch), access the function
[LOC,]
in the easy menu, confirm by pressing
/
(short touch), then the message
[no,,]
will be displayed. After that keep the key
>
pressed for the
time configured for the functions lockdown (F36), until
[LOC,]
is displayed. The message
[On,,]
will be displayed indicating the lockdown function is activated upon releasing the key.
To unlock, turn the controller off and then turn it on again with the key
>
pressed. Keep the key pressed
until
[LOC,]
is displayed. Keep the key pressed for ten seconds and the message
[OFF,]
will be
shown on the display indicating the deactivation of the lockdown
function when the key is released.
6.3.1. Adjusting desired temperature (setpoint)
If configured not to use recipes (F03=
[no,,]
):
- Hold down the
/
key for 2 seconds until the message
[Set,]
is displayed;
- Then the message
[SP,,]
will be displayed and the setpoint may be adjusted;
- Use the
>
or
<
keys for changing the value, then press
/
to confirm.
If configured to use presets (F03=
[Yes,]
):
Each preset may be set up to use different values for the Setpoint, Control differential (hysteresis) and
Cooling time (interval between defrosts).
To select the preset:
- Hold down the
/
key for 2 seconds until the message
[Set,]
is displayed;
- Then the currently selected preset will appear
[Rc1,]
or
[Rc2,]
.
- Use the
>
or
<
keys to select which of the 2 presets will be used.
- To confirm the selection, press
/
.
Note:
The values of functions Setpoint, Control differential (hysteresis) and Cooling time (interval
between defrosts) for each preset are set up in the parameters menu.
6.3.2. Manual defrost
The manual defrost is carried out through the quick access menu. Hold down the
;
key (quick touch)
until the message
[dEFr]
appears (flashing
@
LED), and then press the
/
key (quick touch) to make
a selection. Then the message
[defr][On,,]
will appear (
@
LED on).
To turn off defrost manually press the
;
key (quick touch) until the message
[defr]
appears (flashing
@
LED). Press the
/
key (quick touch) to select. Then the message
[defr][OFF,]
appears (
@
LED off).
The manual defrost may also be activated/deactivated by holding down the key
<
for 4 seconds.
<
<
<
Enters quick access menu.
;
Hold down for 4 seconds: Carries out manual defrost.
MT-514
e
MT-514
e
6.3.4. Control functions shutdown
Turning the control functions off allows for the controller to operate just as an indicator of temperature,
keeping the control outputs and the alarms disconnected. Use of this feature is enabled or not by the
control functions shutdown (F35) function. When enabled, the control and alarms functions are turned
off (
[CtrL][OFF,]
) or on (
[CtrL][0n,,]
) through the quick access menu in the option
[CtrL]
. When the control functions are off the message
[OFF,]
will then be displayed alternately
with the temperature and the other messages.
NOTE:
When switching the control functions back on,
will continue to respect the
functions “
[,F16]
- Minimum OUT1 output time off” and “
[,f17]
- Initial status when energizing the
instrument”.
MT-514
e
MT-514
e
Note 1:
The minimum and maximum temperature records shall only be performed after the elapsing of
the alarm inhibition time when energizing the controller and after the delay in the instrument energizing
[,F27]
+
[,F19]
.
Note 2:
The minimum and maximum temperature records shall only be performed after the compressor
reaches the active preset setpoint ; before that, the
[____]
messages will be displayed for the records
of minimum and
[++++]
for the records of maximum temperature.
6.3.7. Unit Selection
To select the temperature unit in which the instrument will operate enter the function
[,F01]
using the
access code
[,231]
then press the
/
. key. Then, select the unit desired
[,=C,]
or
[,=F,]
using
the
<>
keys; to confirm press
/
. Every time the unit is changed, the functions settings return to the
default value, thus, they must be set up again.
6.3.8. Buzzer inhibition
When activated, the buzzer can be inhibited by pressing the
>
key for two seconds. The Buzzer will
remain inhibited until a new alarm event takes place.
6.4. Advanced operations
The functions menu can be accessed through the quick access menu (according to chapter 6), option
[Func]
or by pressing simultaneously
during the temperature display. To allow change of
parameters, enter
[,F01]
by pressing
/
(quick touch) and using the
keys enter code 123
(one hundred and twenty-three), and then confirm with
/
. For changing the other functions, browse the
menu through the
keys and proceed the same way in order to adjust them. To exit the menu
and return to the normal operation, press
/
(long touch) until
[----]
is displayed.
OBS:
If the functions lockdown is enabled, when pressing the
keys, the controller will display
the message
[LOC,]
and will not allow parameter adjustment.
>
and
<
>
or
<
>
or
<
>
or
<
6.5. Parameters table
Legend:
[yes,]
= yes
[no,,]
= no
[Off,]
= off
6.3.5. Visualization of Processes
To view the process and the time elapsed, press
>
(quick touch) or by the
[dEL,]
- Initial delay (delay in the instrument start-up)
[rEFr]
- Cooling
[Hot,]
- Heating
[dEFr]
- Defrost
[drAi]
- Drainage
[----]
- Control functions off
;
(Flatec) key pressing it
until the message
[Proc]
appears. This way, the controller will display the current process status, and
the following messages may appear on the display:
6.3.6. Minimum and Maximum Temperature Record
Pressing down the
<
key or also via the quick access menu (see chapter 6), will cause the message
[rE9,]
to be displayed, then the minimum and maximum temperatures recorded.
For erasing the current minimum and maximum values, hold down the
;
key (quick touch) until the
message
[CrE9]
is displayed, then the message
[CodE]
will appear; enter the value
[,123]
,
then confirm with the
/
key. If the code is correctly entered, the message
[rSt,]
will be displayed.
[rSt,]
. This procedure keeps unauthorized users from erasing the minimum and maximum
temperature records.
F01- Access code 123 (one hundred and twenty-three):
This is required when intending to change the configuration parameters. Entering of this code is not
required if the intention is just visualizing the parameters adjusted.
It allows entering of the expected access codes:
[,123]
- Allows access for changing the table parameters.
[,231]
- Allows configuring of the unit of measurement
[,=f,]
or
[,=C,]
.
[,231]
- To select the unit in which the instrument will operate enter the function
[,F01]
using the
access code
[,231]
then press the
/
key. Then, select the unit desired
[,=C,]
or
[,=F,]
using
the
< >
keys; to confirm press
/
.
NOTE:
Every time the unit is changed, the parameters should be reset, since they assume the
‘standard’ values of the parameter’s table.
F02 - Sensor indication displacement (offset):
Allows compensation for any temperature deviations from sensor replacement or change in the cable
length.
or
6.5.1. Description of parameters
Access code 123
Sensor indication displacement (offset)
Using Presets
Output operating mode OUT1
Operation setpoint (
)
Control differential (Hysteresis) (
)
Cooling time (interval between defrosts) (
)
Defrost time (
)
Operation setpoint (
)
Control differential (Hysteresis) (
)
Cooling time (interval between defrosts) (
)
Defrost time (
)
Minimum setpoint allowed to the end user
Maximum setpoint allowed to the end user
Minimum OUT1 output time on
Minimum OUT1 output time off
Initial status when energizing the instrument
Temperature indication locked during defrost
Instrument energization delay
Compressor status with the sensor damaged
Compressor time on in case of error
Compressor time off in case of error
Maximum Compressor on without reaching setpoint
Low temperature alarm
High temperature alarm
OUT2 output operating mode
Alarm inhibition time when energizing the controller
Enable buzzer
Digital input operating mode
Output on time in OUT2 alarm status
Output off time in OUT2 alarm status
Open door time for alarm
Operating mode of the digital filter
Digital filter intensity applied to the sensor
Functions lockdown
Time for functions lockdown
Control functions shutdown
rc1
rc1
rc1
rc1
rc2
rc2
rc2
rc2
[,F01]
[,F02]
[,F03]
[,F04]
[,F05]
[,F06]
[,F07]
[,F08]
[,F09]
[,F10]
[,F11]
[,F12]
[,F13]
[,F14]
[,F15]
[,F16]
[,f17]
[,f18]
[,F19]
[,F20]
[,F21]
[,F22]
[,F23]
[,F24]
[,F25]
[,F26]
[,F27]
[,F28]
[,F29]
[,F30]
[,f31]
[,f32]
[,F33]
[,F34]
[,f35]
[,f36]
[,f37]
Fun
Min Max Unit
CELSIUS
FAHRENHEIT
Min Max Unit
Standard
-
-5.0
no
0-cool.
-50
0.1
1
0(no)
-50
0.1
1
0(no)
-50
-50
0(no)
0(no)
0-cool.
no
0(no)
0
1
1
0(no)
-50
-50
1
0(no)
0(off)
0(no)
0
0
0(no)
0
0(no)
0
15
0(no)
-
-9
no
0-cool.
-58
1
1
0(no)
-58
1
1
0(no)
-58
-58
0(no)
0(no)
0-cool.
no
0(no)
0
1
1
0(no)
-58
-58
1
0(no)
0(off)
0(no)
0
0
0(no)
0
0(no)
0
15
0(no)
-
5.0
yes
1-
200
20
999
999
200
20
999
999
200
200
999
999
1-defr.
yes
240
2
999
999
240
200
200
5
999
1
6
999
999
999
1
20
2
60
2
heat.
-
9
yes
1-
392
36
999
999
392
36
999
999
392
392
999
999
1-defr.
yes
240
2
999
999
240
392
392
5
999
1
6
999
999
999
1
20
2
60
2
heat.
-
°C
-
-
°C
°C
min.
min.
°C
°C
min.
min.
°C
°C
sec.
sec.
-
-
min.
-
min.
min.
min.
°C
°C
-
min.
-
-
sec.
sec.
min.
-
sec.
-
sec.
-
-
°F
-
-
°F
°F
min.
min.
°F
°F
min.
min.
°F
°F
sec.
sec.
-
-
min.
-
min.
min.
min.
°F
°F
-
min.
-
-
sec.
sec.
min.
-
sec.
-
sec.
-
-
0
no
0-cool.
4
1
240
30
0
1
240
30
-50
75
20
20
0-cool.
no
0(no)
0
15
15
0(no)
-50
200
1
0(no)
0(off)
0(no)
1
1
0(no)
0
0(no)
0
15
0(no)
-
0
no
0-cool.
39
1
240
30
32
1
240
30
-58
167
20
20
0-cool.
no
0(no)
0
15
15
0(no)
-58
392
1
0(no)
0(off)
0(no)
1
1
0(no)
0
0(no)
0
15
0(no)
Standard
Description