6.3.8 Control functions shutdown
The shutdown of the control functions allows the controller to operate only as a temperature indicator,
keeping the control outputs and alarms off. The use of this feature is enabled or disabled by the
shutdown function of the control functions (F56). When enabled, the control functions and alarms are
switched off (
[CTRL][OFF,]
) or on (
[Ctrl][ON,,]
) in the quick access menu through the
[Ctrl]
option. When the control functions are off, the message
[OFF,]
is displayed alternating with
the temperature and other messages.
6.3.9 Stage of the process, elapsed time and temperature in
sensors S2 and S3
The operating status of the controller can be displayed by pressing the
>
key (short press). A
sequence of messages will be shown, indicating the current process, time (hh:mm) already elapsed in
this stage, temperature in the evaporator (S2) and temperature in S3. If the sensors are disabled, their
measurements will not be displayed.
Stages of the process:
[dEL,]
Initial delay (delay at start of the instrument)
[Fan,]
Fan-delay (delay for return of the fan)
[rEFr]
Cooling
[Pre,]
Pre-Defrost
[dEFr]
Defrost
[dRAi]
Drainage
[OFF,]
Control functions off
6.3.10 Minimum and Maximum Temperature Record
The display of the minimum and maximum temperature record can be requested through the quick
access menu or by pressing the
<
key while displaying the temperature. The minimum and maximum
temperatures recorded for each sensor are displayed in sequence preceded by identification messages
[rEg,]
,
[,t-1]
for ambient sensor (S1),
[,t-2]
for S2 (when active) and
[,t-3]
for S3 (when
active). To delete the minimum and maximum recorded values, hold the
<
button for 2s when
displaying records or use the
[CrEg]
option in the quick access menu. The
[rSET]
message
indicates that the records have been deleted.
6.3.11 Unit Selection
To select the unit in which the instrument will operate enter the
[,F01]
function with access code
[,231]
and press the
/
key. Then, select the desired unit
[,=C,]
or
[,=F,]
using the
<>
keys. To confirm, press
/
. Whenever the unit is changed, the function settings assume the
default value, therefore needing to be reconfigured.
6.3.7 Functions Lockdown
The use of the functions lockdown provides greater safety for the instrument's operation. With it active,
the setpoint and other parameters are visible to the user, but protected against unauthorized changes.
To activate the functions lockdown, access the
[LOC,]
function in the quick access menu. The
message
[no,,]
(lockdown must be enabled and deactivated), with it on display hold down the
>
key for the time set for functions lockdown (F55), the activation is indicated by the message
[LOC,]
[On,,]
. To enable the use of this function it is necessary that the time for functions lockdown (F55) is
set to a value greater than or equal to 15 seconds. The
[LOC,]
message when trying to change the
parameters indicates that the functions lockdown is active. To deactivate it, turn the controller off and on
again with the
>
key pressed. Keep the key pressed until the message
[LOC,][OFF,]
indicates
unlocking
(10 seconds)
.
6.4 ADVANCED OPERATIONS
The functions menu can be accessed through the quick access menu, option
[Func]
or
simultaneously pressing
<
and
>
while displaying the temperature. To allow changing the
parameters, enter
[,F01]
by pressing
/
(short press), and using the
<
or
>
keys enter code 123
(one hundred and twenty three). Confirm with
/
. To modify the other functions, navigate the menu
using the
<
or
>
keys and follow the same procedure to set them. To exit the menu and return to
normal operation, press and hold
/
until
[----]
appears.
NOTE:
If the functions lockdown is active when pressing the
<
or
>
keys, the controller will show the
[LOC,]
message on the display and will not allow the setting of parameters.
6.3.2 - Fast Freezing
In the fast freezing mode the cooling output remains permanently activated, thus accelerating the
cooling or freezing process. This operating mode can be activated or deactivated in the quick access
menu through the
[FASt]
option or through an external switch connected to the digital input (F49 or
F50). It can also be deactivated automatically by time (F15) or by low temperature (F14). During
operation in the fast freezing mode, the compressor on indication flashes quickly and defrost keeps
happening. If, when activating the fast freezing mode, the controller identifies that there is a defrost
scheduled to start by time in this period, the defrost will be performed immediately before entering the
fast freezing mode.
6.3.3 - Economic setpoint (SPE)
The
[SP-E]
provides the system with greater economy by using more flexible parameters for
temperature control (F06 - Economic Setpoint and F07 - Control Differential). When active, the
[ECO,]
message is displayed alternating with the temperature and other messages. The operation in
economy mode can be activated or deactivated through the commands:
Function
Command
Action
6.3.4 Manual defrost
The defrost process can be activated/deactivated manually in the quick access menu through the
[defr]
option or the external switch connected to the digital input (F49 or F50). Activation or
deactivation will be indicated by the messages
[defr][On,,]
or
[defr][OFF,]
respectively.
6.3.5 How to determine the end of defrost by temperature
a)
Reconfigure the listed functions at the end of the defrost to the maximum value:
- Cooling time (Interval between defrosts)
F3=999min
- Evaporator temperature to end defrost
F28=105°C / 221°F
- Maximum defrost time
F23=0 (OFF)
b)
Wait for a while until a layer of ice forms in the evaporator.
c)
Perform a manual defrost (using the
;
scroll key up to
[dEFr]
and press
/
).
d)
Follow the melting process.
e)
Wait until all of the ice in the evaporator has melted to consider the process completed.
f)
With the defrost finished, check the evaporator temperature (S2) using the
>
key (see section
6.3.9).
g)
Using the value read in S2, set the temperature for end of defrost
- Evaporator temperature for end of defrost
F28 =Temp. S2
h)
For safety, reset the (maximum defrost time), according to the type of defrost set.
Eg:
- Electrical defrost (by resistance)
F23=45min
- Hot gas defrost
F23=20min
i)
Finally, set the cooling time (F3) at the desired value.
6.3.6 Defrost with two evaporators
With S3 configured for the 2nd evaporator (F49), the Fan output allows control of the second resistance.
Defrost always starts with the two outputs triggered. The resistors are shut down individually as their
evaporators reach the temperature to end defrost. With the two outputs off or having the maximum
defrost time elapsed, the draining process is started. With these settings, all the features of the Fan are
disregarded, including the Fan Delay process.
FAN-DELAY
COOLING
PRE-DEFROST
MAX. F33
IF F25=0
F03
F22
F31
F34
Unlock
the indication
IF F25=1
F27
Lock the display
if enabled on F31
DEFROST
DRAINAGE
MAX. F23
F32
F28
Connection 12 Vac/dc
1
5 6 7 8
2 3 4
9
10 11 12 13 14 15 16 17
Sensor S1
D1/S3
D2
Sensor S2
CO
MP
DE
FR
FA
NS /
DE
FR 2
24 Vac/dc
1
5 6 7 8
2 3 4
9
10
Sensor S1
D1/S3
D2
Sensor S2
Connection 24 Vac/dc
11 12 13 14 15 16 17
CO
MP
DE
FR
FA
NS /
DE
FR 2
12 Vac/dc
6.5 TABLE OF PARAMETERS
CELSIUS
FAHRENHEIT
Min
Max
Unit
Fun
[,F01]
[,F02]
[,F03]
[,F04]
[,F05]
[,F06]
Min
Max
Unit
Access code: 123 (one hundred and twenty-three)
Delay at start (energization)
Cooling time (interval between defrosts)
Normal setpoint
Normal setpoint control differential (hysteresis)
Economic setpoint
Loads supply
Initial delay
Cooling
*The
sensor S1 (black)
must be in the ambient.
*The
sensor S2 (gray)
must
be placed in the evaporator
through metallic cramp.
Description
Standard
Standard
Loads supply
-
F49 / F50
F10
F11
F12
F49 / F50
F13
F13
-
-
Activates / Deactivates
Activates / Deactivates
Activates
Deactivates
Stays activated
Stays deactivated
Deactivates
Stays deactivated
Stays deactivated
Deactivates
Action through quick access menu (
[ECO,]
)
External key (digital input)
Closed door time to activate
S3-S1 temperature difference to deactivate
S3-S1 temperature difference to activate
Open door indication (digital input)
Maximum time in economy mode
Maximum time in economy mode =0(no)
Error in ambient temperature reading (S1)
When switching on the instrument
0
0 (no)
1
-50
0.1
-50
999
30
999
105
20
105
-
min.
min.
°C
º C
º C
0
0 (no)
240
-15
2.0
-10
-
min.
min.
°F
°F
°F
0
0
1
-58
-58
-58
999
30
999
221
36
221
0
0 (no)
240
5
3
14
