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. Also is possible turn on/ turn off the control functions by pressing the key
;
for 5
seconds.
Note:
The time defined in the startup delay function begins counting once the control functions are
switched on again.
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
[----]
Control functions off
6.3.10 Minimum and Maximum Temperature Record
The display of the minimum and maximum temperature record can be checked 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 temperature 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
<
or
>
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 adds greater security to the operation of the controller. When it is
active, the setpoint and other parameters are visible to the user, but are protected against undue
changes (F57=2) or you can block changes of control functions and leave the adjustment of the setpoint
enabled (F57=1). To activate the functions lock, access the
[LOC,]
option in the quick access menu.
Then
[no,,]
message will be displayed (lock must be enabled and inactive). With that on the display,
press the
>
key for the time configured for the functions lock (F58), the activation is indicated by the
[LOC,][On,,]
message. To enable the use of this function, F57 must be configured with 1 or 2.
When trying to change the parameters, the
[LOC,]
message indicates that the functions lock is active,
to deactivate it, turn the controller off and then turn it on again with the
>
key pressed. Keep the key
pressed until the
[LOC,][OFF,]
message indicates the 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 (F52 or
F53). It can also be deactivated automatically by low temperature (F33) or by time (F34). 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 (F27- Economic Setpoint and F28 - 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]
(F52 or
F53). Activation or deactivation will be indicated by the messages
[defr][On,,]
or
[defr][OFF,]
respectively.
or pressing the
<
for 4 seconds or using external switch connected to digital input
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)
F8 = 999min.
- Evaporator temperature to end defrost
F13 = 105°C / 221°F
- Maximum defrost time
F14 = 90min.
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
F13 =Temp. S2
h)
For safety, reset the maximum defrost time, according to the type of defrost set.
Eg:
- Electrical defrost (by resistance)
F14 = 45min.
- Hot gas defrost
F14 = 20min.
i)
Finally, set the cooling time
(F8)
at the desired value.
6.3.6 Defrost with two evaporators
With S3 configured for the 2nd evaporator (F52), 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. F20
IF F39=0
F08
F23
F17
F19
Unlock
the indication
IF F39=1
F41
Lock the display
if enabled on F17
DEFROST
DRAINAGE
MAX. F14
F18
F13
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
Loads supply
The
sensor S1 (black)
must be in the ambient.
The
sensor S2 (gray)
must
be placed in the evaporator
through metallic cramp.
Loads supply
F29
F30
F31
F32
F32
F52 / F53
F52 / F53
-
-
-
Activates
Deactivates
Stays activated
Deactivates
Stays deactivated
Activates / Deactivates
Stays deactivated
Activates / Deactivates
Stays deactivated
Deactivates
Closed door time to activate
S3-S1 temperature difference to deactivate
S3-S1 temperature difference to activate
Maximum time in economy mode
Maximum time in economy mode =0(no)
External key (digital input)
Open door indication (digital input)
Action through quick access menu (
[ECO,]
)
Error in ambient temperature reading (S1)
When switching on the instrument
CELSIUS
FAHRENHEIT
Min
Max
Standard
Unit
Description
Fun
[,F01]
[,F02]
[,F03]
[,F04]
[,F05]
[,F06]
Min
Max
Unit
0
0.1
-20
-50
-50
0 (NO)
999
20
20
105
105
30
-
°C
° C
° C
°C
min.
0
2
0
-50
105
0 (NO)
-
°F
°F
°F
°F
min.
0
1
-36
-58
-58
0 (NO)
999
36
36
221
221
30
0
3
0
-58
221
0 (NO)
Access code
Control differential (normal hysteresis)
Ambient temperature S1 indication offset
Minimum setpoint allowed to the end user
Maximum setpoint allowed to the end user
Delay at start (energization)
Standard
