Danfoss Optyma AK-RC 251 User manual

Installation Guide
Temperature controller for walk-in coolers
and freezers, Type AK-RC 251
© Danfoss | DCS (vt) | 2021.02 AN36292867744601-000101 | 1
080R9291
AN36292867744601-000101
Warnings
• Using the unit without observing the manufacturer's instructions may alter the appliance's safety requirements. Only NTC probes
supplied by Danfoss should be used for the unit to operate correctly.
• From -40 – +68 °F, if the NTC probe is extended to 3,280 ft with at least 20AWG cable, the maximum deviation will be 0.45 °F.
• It should be installed in a place protected from vibrations, water and corrosive gases, where the ambient temperature does not
exceed the value indicated in the technical data.
• For the reading to be correct, the probe should be used in a place without heat influences apart from the temperature you want to
measure or control.
• IP65 protection degree is only valid with the protection cover closed.
• IP65 protection degree is only valid if the cables enter the device using electrical conduit + gland with IP65 or above. The size of the
glands should be suitable for the diameter of the conduit used.
• Do not spray the unit directly with high-pressure hoses, as this could cause damage.
IMPORTANT:
• Before starting the installation, you must take the advice of local regulations in force.
• The AUXILIARY relays are programmable, and their operation depends on the configuration.
• The function of the digital inputs depends on the configuration.
• The recommended currents and powers are the maximum working currents and powers.
EN : Temperature controller for walk-in coolers and freezers
ES : Controlador de temperatura para cuartos fríos y congeladores
Type AK-RC 251
Wiring
Always disconnect the power supply to do the wiring.
The probes and their cables should NEVER be installed in a conduit together with power, control or power supply cables.
For disconnection, the power supply circuit must be equipped with a switch of at least 2 A, 230 V, located near the device. The power
supply cable will be H05VV-F or NYM 1x16/3. The section to be used as wire rated according to local regulations but must never be
less than 14AWG.
Cables for relay or contactor outputs should use 14AWG, allow working temperatures equal to or over 158 °F and be installed with as
few bends as possible.
The 120/230 V~ wiring must be kept clear of any other external element.
The wiring to be done depends on the type of installation. Use the appropriate diagram based on the option selected in the
wizard. Check the available options on the diagrams included in the controller's packaging.
Wizard refers to a built in tool to guide the user through the set up process.
Maintenance
• Clean the surface of the unit with a soft cloth, water and soap.
• Do not use abrasive detergents, gasoline, alcohol or solvents, as this might damage the unit.
ENGLISH

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Keypad
Pressing it for 3 seconds activates/deactivates Stand-By mode. In this mode, regulation is paused and the icon is displayed.
In the programming menu, this exits the parameter without saving changes, returns to previous level or exits programming.
Pressing once displays the temperature of probe S2 for 10 seconds (If it is enabled).
Pressing it for 3 seconds starts/stops the defrost.
In the programming menu, this allows scrolling around the different levels, or, during the setting of a parameter, changing its
value.
Pressing it for 3 seconds activates/deactivates continuous cycle mode.
In the programming menu, this allows scrolling around the different levels, or, during the setting of a parameter, changing its
value.
Pressing once activates/deactivates the cold room light.
Pressing it for 3 seconds accesses the condensed programming menu.
Pressing it for 6 seconds accesses the expanded programming menu.
In the programming menu, this accesses the level shown on the display or, during the setting of a parameter, accepts the new
value.
Pressing once displays the current effective value of the Set Point, taking into consideration temporary modifications by other
parameters (C10 or C12).
When an alarm is underway, pressing once mutes the acoustic alarm. Pressing for 3 seconds accesses the Set Point setting.
Indicators
Fixed: Stand-By Mode activated. Regulation is paused.
Flashing: Controlled shutdown process for the regulation underway.
Fixed: Cold room door open.
Flashing: The door has been open for a greater time than has been defined in parameter A12.
There is an active alarm, but not an active HACCP alarm.
Fixed: HACCP alarm active.
Flashing: HACCP alarm registered and unconfirmed. Press the key to confirm an HACCP alarm.
Fixed: Evaporator fans active.
Flashing: The evaporator fans should be active but a delay is preventing this.
(Refer to the Drip time section of the Manual for details).
Fixed: The cold solenoid is active.
Flashing: The solenoid should be active but a delay or protection is preventing this.
(Refer to the Fan start-up section of the Manual for details).
Fixed: Compressor active.
Flashing: The compressor should be active but a delay or protection is preventing this.
(Refer to the Compressor Protection timing section of the Manual for details).
Defrost relay active.
Continuous cycle mode active.
Cold room light active.
Alarm underway muted.
Temperature displayed in ° Fahrenheit / ° Centigrade.
Programming mode active.
STAND-BY
If the temperature regulation cannot be instantly stopped due to its configuration, a controlled stop process starts and the
icon flashes. To stop the controlled stop process and force the step to Stand-by, press the Stand-by key again for 3 seconds.

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Initial configuration
The first time the unit is powered up, it will enter into the Wizard mode. The display will show the message
flashing with 0.
Step 1:
Select the most suitable InI option based on the type of installation to be carried out and press SET. The
available options will be shown in the following table:
Wizard parameters list
Step 2:
Use keys and to enter the desired Temperature Set Point value and press SET. The wizard has finished.
The unit will begin to regulate the temperature.
If this is not the first time you use the wizard, after completing the last step the display will show the
message dFp (default parameters). You may choose between two options:
0:Only parameters included in the wizard will be modified
1:Parameters modified by the wizard will be changed, all other parameters will return to their factory setting.
Important: The wizard will start automatically only on the first power on. To enter the wizard mode, initiate Stand-By mode by pressing
the key for 3 seconds and wait until the unit completely halts the temperature regulation
(The indicator will light up permanently) and press the following keys in sequence, , , SET.
Note: Additional quick set up choices, including hot gas and reversed cycle options are detailed in the User Manual.
InI Type of installation Parameters Diagram to
be used
Cold regulation Defrost Evaporator fans o00 I00 I10 I11 I20 I21 d1 d7 F3
0 Demo Mode: it displays the temp. but does not regulate or activate relays
1 Solenoid Electric Yes 0 2 0 0 0 0 20 0 0 A
3 Solenoid + compressor Electric Yes 1 2 0 0 0 0 20 0 0 B
4 Solenoid Air Yes 0 1 0 0 0 0 20 1 1 A
6 Solenoid + compressor Air Yes 1 1 0 0 0 0 20 1 1 B
11 Solenoid Static No 0 1 0 0 0 0 20 1 - A
13 Solenoid + compressor Static No 1 1 0 0 0 0 20 1 - B
o00 Configuration of relay AUX1 0=Deactivated 1=Compressor/Crankcase heater
2=Light 3=Virtual control
I00 Connected probes 1=Probe 1 (Cold room) 2=Probe 1 (Cold room) + Probe 2 (Evaporator)
I10 Configuration of digital input 1
0= Deactivated 1=Door contact 2=External alarm
3=Severe external alarm 4=Change of SP 5=Remote defrost
6=Defrost block 7= Low pressure switch 8=Remote Stand-by
I11 Polarity of the digital input 1 0=Activates on closing contact 1=Activates on opening contact
I20 Configuration of digital input 2
0= Deactivated 1=Door contact 2=External alarm
3=Severe external alarm 4=Change of SP 5=Remote defrost
6=Defrost block 7=Register probe 8=Probe 2° evaporator
9=High pressure switch for Hot Gas 10=Remote Stand-by
I21 Polarity of the digital input 2 0=Activates on closing contact 1=Activates on opening contact
d1 Maximum defrost duration (0=defrost deactivated)
d7 Type of defrost 0=Resistors 1=Air/fans 2=Hot gas
3=Reversal of cycle
F3 Status of the fans during the defrost 0=Shut down 1=Running
For more details, full User Manual and other information, scan the QR code.

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Configuration
Condensed programming menu
Enables the rapid configuration of the most frequently-used parameters (SP, C1, d0, d1, d4, F3, A1 and A2). Press the SET key for 3
seconds to access it.
Extended programming menu
Use the extended programming menu to configure all of the unit’s parameters in order to adapt it to installation requirements. Press the
SET key for 6 seconds to access it.
Regulation and control
Important:
• If the function of the password has been configured as a keypad block (b10=2), or as an access block to parameters (b10=1), you
will be requested to enter the access code programmed in PAS when attempting to access either of the two functions. If the entered
password is not correct, the unit will go back to showing the temperature.
• Certain parameters or menus may not be visible depending on the configuration of the rest of the parameters.
Level 1 Level 2 Description Values Min. Def. Max.
rE
SP Temperature setting (Set Point) ºF -58 32.0 210
C0 Probe 1 calibration (Offset) ºF -36.0 0.0 36.0
C1 Probe 1 differential (Hysteresis) ºF 0.1 3.6 36
C2 Set Point top locking (it cannot be set above this value) ºF -58 210 210
C3 Set Point bottom locking (it cannot be set below this value) ºF -58 -58 C2
C4
Type of delay for the protection of the compressor:
0=Minimum time of compressor in OFF
1=Minimum time of compressor in OFF and in ON in each cycle
0 0 1
C5 Protection delay time (Value of the option selected in parameter C4) Min. 0 0 120
C6
COOL relay status with fault in probe 1:
0=OFF; 1=ON; 2=Average according to last 24 h prior to probe error
3=ON-OFF according to prog. C7 and C8
023
C7 Relay time in ON in the event of probe 1 failure
(If C7=0 and C8≠0, the relay will always be disconnected in OFF) Min. 0 10 120
C8 Relay time in OFF in the event of probe 1 failure
(If C8=0 and C7≠0, the relay will always be connected in ON) Min. 0 5 120
C9 Maximum duration of the continuous cycle mode. (0=deactivated) H. 0 0 48
C10
Variation of the Set Point (SP) in continuous cycle mode. When it reaches this point
(SP+C10), it reverts to the normal mode. (SP+C10 ≥ C3).
The value of this parameter is always negative, unless it is 0. (0=OFF)
ºF 0 -90 C3-SP
C12 Variation of the Set Point (SP) when the change Set Point function is active. (SP+C12 ≤
C2) (0= deactivated) ºF C3-SP 0.0 C2-SP
C19 Maximum start time from Pump Down
(Values between 1 and 9 seconds will not be accepted) (0=deactivated) Sec. 0 0 120
C20 Maximum time for pump down (0= deactivated) Min. 0 0 15
C21 Probe to be displayed 0=All probes (sequential)
1=Probe 1 (Cold Room), 2=Probe 2 (Evaporator), 3=Probe 3 (According to I20) 013
C22 Stop fans and compressor on opening door 0=No, 1=Yes 0 0 1
C23 Start-up delay for fans and compressor with door open Min. 0 0 999
C27 Probe 3 calibration (Offset) ºF -36.0 0.0 36.0
EP Exit to level 1

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Defrost
Evaporator fans
Alarms
Level 1 Level 2 Description Values Min. Def. Max.
dEF
d0 Defrost frequency (Time between 2 starts) H. 0 6 96
d1 Maximum defrost duration (0=defrost deactivated) Min. 0 * 255
d2
Type of message during the defrost:
0=Displays the real temperature; 1=Displays the temperature at the start of
the defrost; 2=Displays the dEF message
0 2 2
d3 Maximum duration of the message
(Time added at the end of the defrost process) Min. 0 5 255
d4 Final defrost temperature (by probe) (If I00 ≠ 1) ºF -58 46.4 122
d5 Defrost on connecting the unit:
0=NO First defrost according to d0; 1=YES, First defrost according to d6 0 0 1
d6 Delay of the defrost start on connecting the unit Min. 0 0 255
d7** Type of defrost:
0=Resistors; 1=Air/fans, 2=Hot gas; 3=Reversal of cycle 0 * 3
d8 Count of time between defrost periods:
0=Total real time, 1=Sum of compressor connected time 0 0 1
d9 Drip time when completing defrost (Shutdown of compressor and fans) Min. 0 1 255
EP Exit to level 1
Level 1 Level 2 Description Values Min. Def. Max.
FAn
F0 Shutdown temperature of fans ºF -58 113 122
F1 Probe 2 differential if fans are shut down ºF 0.1 3.6 36
F2 Shut down fans when the compressor shuts down 0=No, 1=Yes 0 0 1
F3 Status of the fans during the defrost 0=Shut down; 1=Running 0 0 1
F4 Delay of start-up after defrost (If F3=0)
It will only actuate if it is higher than d9 Min. 0 2 99
EP Exit to level 1
Level 1 Level 2 Description Values Min. Def. Max.
AL
A0 Configuration of the temperature alarms 0=Relative to SP 1=Absolute 0 1 1
A1 Alarm for maximum in probe 1 (It should be higher than the SP) ºF A2 210 210
A2 Alarm for minimum in probe 1 (It should be lower than the SP) ºF -58 -58 A1
A3 Delay of temperature alarms in the start-up Min. 0 0 120
A4 Delay of temperature alarms from the end of a defrost Min. 0 0 99
A5 Delay of temperature alarms from when the A1 or A2 value is reached 0 30 99
A6 Delay of the external alarm/Severe external alarm on receiving a signal in
digital input (I10 or I20 =2 or 3) Min. 0 0 120
A7 Delay of external alarm deactivation/Severe external alarm deactivation
when the signal in digital input disappears (I10 or I20=2 or 3) Min. 0 0 120
A8 Show warning if the defrost ends for maximum time, 0=No, 1=Yes 0 0 1
A9
Relay alarm polarity
0= Relay ON in alarm (OFF without alarm); 1= Relay OFF in alarm (ON
without alarm)
0 0 1
A10 Differential of temperature alarms (A1 and A2) ºF 0.1 1.8 36
A12 Delay of open door alarm (If I10 or I20=1) Min. 0 10 120
EP Exit to level 1
* According to wizard.
** It can only be modified using the configuration wizard (InI).

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Basic configuration
Inputs and outputs
HACCP alarm
Level 1 Level 2 Description Values Min. Def. Max.
bcn
b00 Delay of all functions on receiving power supply Min. 0 0 255
b01 Cold room light timing Min. 0 0 999
b10 Function of password
0=Inactive, 1=Block access to parameters, 2=Block keypad 0 0 2
PAS Access code (Password) 0 0 99
b20 MODBUS address 1 1 247
b21 Communication speed:
0=9600 bps, 1=19200 bps, 2=38400 bps, 3=57600 bps bps 0 0 3
b22 Acoustic alarm enabled: 0= No, 1=Yes 0 1 1
Unt Work units: 0=ºC, 1=ºF 0 1 1
EP Exit to level 1
Level 1 Level 2 Description Values Min. Def. Max.
In0
I00 Connected probes
1=Probe 1 (Cold room), 2=Probe 1 (Cold room) + Probe 2 (Evaporator) 1 2 2
I10**
Configuration of digital input 1
0= Deactivated, 1=Door contact, 2=External alarm,
3=Severe external alarm, 4=Change of SP, 5=Remote defrost,
6=Defrost block, 7= Low pressure switch, 8=Remote Stand-by
0 * 8
I11 Polarity of the digital input 1
0=Activates on closing contact; 1=Activates on opening contact 0 * 1
I20
Configuration of digital input 2
0= Deactivated, 1=Door contact, 2=External alarm,
3=Severe external alarm, 4=Change of SP, 5=Remote defrost,
6=Defrost block, 7=Register probe, 8=Probe 2° evaporator,
9=High pressure switch for Hot Gas, 10=Remote Stand-by
0 0 10
I21 Polarity of the digital input 2
0=Activates on closing contact; 1=Activates on opening contact 0 0 1
O00** Configuration of relay AUX1
0=Deactivated, 1=Compressor/Resistor sump, 2=Light, 3=Virtual control 0 * 3
O10
Configuration of relay AUX2
0=Deactivated, 1=Alarm, 2=Light, 3=Virtual control,
4=Door frame resistance, 5=Defrost 2° evaporator,
6=Same as solenoid status, 7=Same as unit status
0 2 7
EP Exit to level 1
Level 1 Level 2 Description Values Min. Def. Max.
HCP
h1 Maximum temperature of HACCP alarm ºF -58 210 210
h2 Maximum permitted time for activation of the HACCP alarm (0=Disabled) H. 0 0 255
EP Exit to level 1
* According to wizard.
** It can only be modified using the configuration wizard (InI).

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Information (reading only)
Messages
Level 1 Level 2 Description Values Min. Def. Max.
tid
InI Option chosen in the configuration wizard
Pd** Pump down active? 0=No, 1=Yes
PU Program version
Pr Program revision
bU Bootloader version
br Bootloader revision
PAr Parameter map revision
EP Exit to level 1
Messages A R
Pd Pump down malfunction error (Shutdown)
LP Pump down malfunction error (Start-up)
E1/E2/E3 Probe 1/2/3 failure (Open circuit, crossed circuit or temperature outside the limits of the probe)  
Ad0 Open door alarm. Only if the door stays open for a greater time than is indicated in parameter A12  
AH Maximum temperature alarm in control probe. The temperature value programmed in A1 has been reached  
AL Minimum temperature alarm in control probe. The temperature value programmed in A2 has been reached  
AE External alarm activated (by digital input)  
AES Severe external alarm activated (by digital input)  
Adt Defrost alarm concluded due to time-out. The time established in d1 has been exceeded
HCP HACCP alarm. The temperature has reached the value of parameter h1 during a longer period than has been
established in h2  
hCP + PF HACCP alarm due to a fault in the power supply. The temperature established in h1 has been reached following a
fault in the power supply  
dEF Indicates that a defrost is being performed
PAS Access code (Password) request. See parameters b10 and PAS
S1 - S2 Shown sequentially with the temperature: The controller is in demo mode, the configuration has not been
made.
** It can only be modified using the configuration wizard (InI).
A: Activates the acoustic alarm
R: Activates the alarm relay

Ordering
Controller
Accessories (for spares and replacement purposes):
Model Description Comments Code no.
AK-RC 251 AK-RC 251 Gen. 2,5 O/P, Single phase
Includes:
• 1 x 1.5 m, NTC 10K sensor
• 1 x 3 m, NTC 10K sensor
• 2 x 2 caps to provide IP65 protection after installation
080Z5000
Name Features Qty Code no.
3.5 m, NTC 10K Sensor Thermo plastic rubber probe 1 084N3210
8.5 m, NTC 10K sensor Thermo plastic rubber probe 50 084N3208
1.5 m, NTC 10K sensor Stainless steel probe 150 084N3200
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Technical specifications
Features Specifications
Power supply 100 - 240 V~, 50 - 60 Hz
Maximum input power in the operation 8.1 VA
Maximum nominal current 15 A
Relay DEFROST - SPDT - 20 A
NO
EN60730-1: 15 (15) A 250 V~
UL-60730: 9 FLA 54 LRA, 240 V AC
UL-60730: RES 12 A, 240 V AC)
NC
EN60730-1: 15 (13) A 250 V~
UL-60730: 6 FLA 36 LRA, 240 V AC
UL-60730: RES 6 A, 240 V AC
Relay FAN - SPST - 16 A
EN60730-1: 12 (9) A 250 V~
UL-60730: 5 FLA 30 LRA, 240 V AC
UL-60730: RES 10 A, 240 V AC
Relay COOL - SPST - 16 A
EN60730-1: 12 (9) A 250 V~
UL-60730: 5 FLA 30 LRA, 240 V AC
UL-60730: RES 10 A, 240 V AC)
Relay AUX 1 - SPDT - 20 A
NO
EN60730-1: 15 (15) A 250 V~
UL-60730: 9 FLA 54 LRA, 240 V AC
UL-60730: RES 12 A, 240 V AC
NC
EN60730-1: 15 (13) A 250 V~
UL-60730: 6 FLA 36 LRA, 240 V AC
UL-60730: RES 6A, 240 V AC
Relay AUX 2 - SPDT - 16 A
NO
EN60730-1: 12 (9) A 250 V~
UL-60730: 5 FLA 30 LRA, 240 V AC
UL-60730: RES 10 A, 240 V AC
NC EN60730-1: 10 (8) A 250 V~
UL-60730: 5A, 240 V AC
No. of relay operations EN60730-1:100.000 operations
Probe temperature range -58 – 211 ºF
Resolution, setting and differential 0.2 ºF
Thermometric precision ±1.8 ºF
Loading tolerance of the NTC probe at 25 °C ±0.7 ºF
Working ambient temperature 14 – 122 ºF
Storage ambient temperature -22 – +140 ºF
Protection degree IP 40 (IP 65 installing the proper glands)
Pollution degree II acc. UL 60730-1
Construction Independently mounted acc. UL 60730-1
Control device classification
Built-in assembly, with Type 1.B automatic operation action feature, for use in clean situations,
logical support (Software) class A and continuous operation.
Double isolation between power supply, secondary circuit and relay output.
Temperature during ball-pressure test Accessible parts: 167 ºF
Parts which position active elements: 257 ºF
Current of radio jamming suppression tests 270 mA
Voltage and current as per EMC tests 207 V, 17 mA
Type of assembly Fixed internal
MODBUS address Shown on label
Dimensions 11.42 in (W) x 5.55 in (H) x 3.32 in (D)
Internal buzzer

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Advertencias
• Utilizar el controlador sin respetar las instrucciones del fabricante, puede alterar los requisitos de seguridad del enfriador. Para el
funcionamiento correcto del mismo sólo deberán utilizarse sensores de temperatura tipo NTC suministrados por Danfoss.
• Entre –40 ºF y +68 ºF, si el sensor de temperatura NTC es colocado hasta 1.000m de distancia con cable de calibre mínimo 20AWG, la
desviación de temperatura máxima esperada será de 0.45 ºF.
• Debe ser instalado en un sitio protegido de vibraciones, agua y de gases o liquidos corrosivos, donde la temperatura ambiente no
supere el valor reflejado en los datos técnicos.
• Para que la lectura sea correcta, el sensor de temperatura debe ubicarse en un sitio sin influencias térmicas ajenas a la temperatura
que se desea medir o controlar.
• El grado de protección IP65 solo es válido con la tapa protectora cerrada.
• El grado de protección IP65 sólo es válido si la entrada de cables al equipo se realiza mediante tubo para conducciones eléctricas +
conector con IP65 o superior. El tamaño de los conectores debe ser el adecuado para el diámetro de tubo utilizado.
• No rociar directamente el equipo con mangueras de alta presión, pues esto puede causar daño.
IMPORTANTE:
• Antes de iniciar la instalación, debe tener en cuenta las normas locales vigentes.
• Los relés AUXILIARES son programables y su funcionamiento depende de la configuración.
• La función de las entradas digitales depende de la configuración.
• Los voltajes y consumo de corriente indicados son los valores máximos de trabajo permitidos.
Cableado
Desconectar siempre la alimentación eléctrica antes de realizar el cableado.
Los sensores de temperatura NUNCA deben instalarse junto con cables de potencia, control o alimentación.
El circuito de alimentación debe estar provisto de un interruptor para su desconexión de mínimo 2 A, 230 V, situado cerca del aparato. El
cable de alimentación será del tipo H05VV-F o NYM 1x16/3. La sección a utilizar dependerá de las normas locales vigentes, pero nunca
deberá ser inferior a 14AWG.
Los cables para las salidas de los relevadores o contactores deben ser mínimo 14AWG, deben admitir temperaturas de trabajo iguales o
superiores a 158 ºF y se deben instalar con el menor número de dobleces.
La zona de conexión a 120 / 230 V debe mantenerse despejada de cualquier elemento externo.
La conexión a realizar depende del tipo de instalación. Utilice el diagrama eléctrico adecuado en función de la opción escogida en el
asistente. Consulte las opciones disponibles en la hoja de diagramas eléctricos incluido con el control.
Mantenimiento
• Limpie la superficie del equipo con un paño suave, agua y jabón.
• No utilice detergentes abrasivos, gasolina, alcohol o disolventes, esto puede dañar el controlador.
ESPAÑOL

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Teclado
Presionar este botón durante 3 segundos, activa / desactiva el modo Stand-By. En este modo la regulación se detiene y el
display muestra el icono .
En el menú de programación, este botón sale del parámetro sin guardar cambios, retrocede al nivel anterior o sale de la
programación.
Presionar el botón una vez muestra la temperatura del sensor S2 durante 10 segundos (Si está disponible).
Pulsando durante 3 segundos, inicia / detiene el deshielo.
En el menú de programación, permite moverse por los diferentes niveles, o, durante el ajuste de un parámetro, permite cambiar
el valor del mismo.
Presionar este botón durante 3 segundos, activa / desactiva el modo ciclo continuo.
En el menú de programación, permite moverse por los diferentes niveles, o, durante el ajuste de un parámetro permite cambiar
el valor del mismo.
Presionar el botón una vez activa / desactiva la luz del cuarto frio.
Presionar este botón durante 3 segundos, accede al menú de programación reducido.
Presionar este botón durante 6 segundos, accede al menú de programación extendido.
En el menú de programación, accede al nivel mostrado en pantalla o, durante el ajuste de un parámetro, acepta y graba el
nuevo valor.
Presionar el botón una vez muestra el valor efectivo actual del Set Point de temperatura, teniendo en cuenta las modificaciones
temporales hechas por otros parámetros (C10 ó C12).
Si existe una alarma en curso, presionar el botón una vez silenciara la alarma acústica. Presionar este botón durante 3 segundos,
accede al ajuste del Set Point de temperatura.
Indicadores
Fijo: Modo Stand-By activo, el control del cuarto frío esta detenido.
Intermitente: Proceso de paro controlado de la regulación en curso.
Fijo: Puerta abierta.
Intermitente: La puerta lleva abierta un tiempo superior al definido en el parámetro A12.
Hay una alarma activa, pero no de tipo HACCP.
Fijo: Alarma HACCP activa.
Intermitente: Alarma de HACCP registrada y sin confirmar. Para confirmar una alarma HACCP, pulsar la tecla
Fijo: Ventiladores de evaporador activos.
Intermitente: Los ventiladores de evaporador deberían estar activos pero algún retardo se lo impide
(ver la sección de tiempo de goteo en el manual para mas detalles).
Fijo: La válvula solenoide esta activa.
Intermitente: La válvula solenoide debería estar activa pero algún retardo o protección se lo impide
(ver la sección de arranque de abanicos en el manual para más detalles).
Fijo: Compresor activo.
Intermitente: El compresor debería estar activo pero algún retraso o protección se lo impide
(ver la sección de tiempo de protección del compresor en el manual para más detalles).
Relevador de deshielo activo.
Modo ciclo continuo activo.
Luz del cuarto frio activa.
Alarma en curso silenciada.
Temperatura indicada en ° Fahrenheit / ° Centígrados.
Modo de programación activo.
STAND-BY
Si la regulación de temperatura no puede detenerse inmediatamente debido a la configuración de la instalación, como por
ejemplo, en el caso de Pump Down, se inicia un proceso de paro controlado y el icono parpadea. Para detener el proceso de
paro controlado y forzar el paso a Stand-by, presionar la tecla Stand-by nuevamente durante 3 segundos.