[L2]
[L3]
7. SIGNS
Reason:
Low temperature alarm.
Actions:
- Check connection and operation of the sensor S1 (ambient);
- Check the cooling system;
- Check function
[a2]
.
Reason:
High temperature alarm.
Actions:
- Check connection and operation of the sensor S1 (ambient);
- Check cooling system and/or door sealing;
- Check function
[a3]
.
Reason:
Low voltage alarm.
Actions:
- Check that the voltage is not below that configured in
[U1]
.
Reason:
High voltage alarm.
Actions:
- Check that the voltage is not above that configured in
[U2]
.
Reason:
Invalid voltage reading.
Actions:
Check the power supply voltage of the instrument.
Reason:
Maximum compressor ON time exceeded without reaching the control
temperature (setpoint).
Actions:
- Check the compressor and the cooling system;
- Check the door sealing;
- Check function
[a1]
.
Reason:
Ambient temperature sensor disconnected or short-circuited.
Actions:
Check the connection on the controller. If necessary, replace the sensor.
Reason:
Evaporator temperature sensor disconnected or short-circuited.
Actions:
Check the connection on the controller. If necessary, replace the sensor.
Reason:
Open door alert.
Actions:
- Ensure that the door is properly closed.
- Check the micro limit switches or magnetic sensor (reed switch) of closed door
detection (if applicable), and the connection to the controller.
8. FREQUENTLY ASKED QUESTIONS
1)I have more than one instrument. Is it possible to use the frontal module of one with the base module
of the other?
Yes, the frontal module works with any base module of the same version.
5)Is it possible to extend the length of the RJ45 cable connecting the base and frontal modules?
Contact Full Gauge Controls for more information.
6)Is it possible to extend the length of the ambient and evaporator sensor cables?
Yes. Contact Full
Gauge Controls for more information.
9. KEY OF PROGRAMMING - EasyProg ver.02 or higher
This accessory's main function is to store the controllers' the setup data. It can load a new controller's setup at
any time and unload onto a production line (of the same controller).
The
MT-444 eXpress
and
MT-444 V-eXpress
controller includes an USB connection to load or unload
setups:
- USB:
can be connected to the computer via the USB port. Using the Sitrad Preset Editor, setups can be copied,
edited and saved in
EasyProg
ver. 02
. The USB port can also electrically supply the
EasyProg
ver. 02
and the controller (when the USB and Serial TTL are used in conjunction).
EasyProg*
Base Module
The keys work in two ways, one is hidden and the other is always visible:
[,0]
The keys remain hidden. Touching any key will only enable the use of the keyboard. If
no key is pressed within 10 seconds, the keyboard will be hidden again. This prevents
unwanted activations from being performed.
[,1]
The keys always remain on. In this mode, the first touch is enough to perform
functions.
[no]
2
-
[no]
0
1
-
0
When control functions are shutdown, the controller starts to operate purely as a
temperature indicator, with all outputs deactivated. This function can operate in the
following ways:
[,0]
Does not allow the shutdown of control functions.
[,1]
Allows turning on and off of control functions only if the functions are unlocked.
[,2]
Allows turning on and off of control functions even if the functions are blocked.
NOTE: To activate or deactivate the control, please refer to item 6.4
[A5]
[A6]
[A7]
[L1]
This function is used to stop the alarm for a certain period, due to a possible increase in
temperature from defrost. During defrost, draining and fan-delay, the alarm does not work.
During the time set in this function, the alarm remains off, waiting for the system to start
working.
When defrost is concluded by time and not by temperature, the user is alerted by a
blinking dot on the lower right corner of the display (
[,,.]
).
With this function enabled, setups are protected against unauthorized changes, and are
available for viewing only. In this state, when trying to change these values, an
[LC]
message will be displayed.
NOTE: To activate or deactivate the functions block, please refer to item 6.3
[no]
99
min
[no]
99
min
[OF]
[On]
-
14-
[no]
60
s
[no]
[no]
[Of]
14-
[no]
Alarm silencing time by temperature
Alarm silencing time when powering the controller
Indication to defrost concluded by time alarm
Time for functions block
Shutdown of the control functions
Operation of the touch keyboard
(*)The minimum default value is 90V for a 115VAC power supply and 200V for a 230Vac power supply.
(**)The maximum default value is 140V for a 115Vac power supply and 260V for a 230Vac power supply.
2)In the
MT-444 V-eXpress
version, is it possible to deactivate the voltage monitor?
Yes, just set the
function U1 to a value greater than U2.
3)Is it possible to deactivate sensor 2 (evaporator)?
Yes, see function S1 on the setup table (item 6.5).
4)What percentage of power supply voltage variation can the controller tolerate?
10% either way.
FUN
MIN
MAX
UNIT
DEFAULT
CELSIUS (FAHRENHEIT)
Reason:
Shutdown of the control functions.
Actions:
Please refer to item 6.4.
Reason:
Alert of defrost concluded by time and not by temperature. The dot in the lower
right corner of the display will blink until the next defrost (if enabled by the function
[A7]
).
Actions:
- Check that there are no burned resistances;
- Check that hot gas is circulating;
- Check that the fan is working and not shorted;
- Check that the maximum defrost time is not too short (
[o1]
,
[o2]
,
[o3]
).
Actions:
Contact Full Gauge Controls.
Actions:
Reconfigure the function values.
*Sold separately
FUNCTION
DESCRIPTION
