Controller for appliance control AK-CC 550A

Controller for appliance control AK-CC 550A

User Guide

Controller for appliance control

AK-CC 550A

ADAP-KOOL® Refrigeration control systems

Introduction

Application

Complete refrigeration appliance control with great flexibility to adapt to all types of refrigeration appliances and cold storage rooms.

Advantages

• Energy optimization of the whole refrigeration appliance

• One controller for several different refrigeration appliances

• Integrated display at the front of the controller

• Quick set-up with predefined settings

• Built-in data communication

• Built-in clock function with power reserve

Principle

The temperature in the appliance is registered by one or two temperature sensors which are located in the air flow before the evaporator (S3) or after the evaporator (S4) respectively. A setting for thermostat, alarm thermostat and display reading determines the influence the two sensor values should have for each individual function.

In addition product sensor S6, which can be optionally placed in the appliance, can be used to register the temperature near the required product in a certain place within the appliance.

The temperature of the evaporator is registered with the S5 sensor which can be used as a defrosting sensor.

In addition to the outlet to the electronic injection valve of the type AKV, the controller has 5 relay outputs which are defined by the use selected – the individual usage options are described in detail on page 12.

Functions

• Day/night thermostat with ON/OFF or modulating principle

• Product sensor S6 with separate alarm limits

• Switch between thermostat settings via digital input

• Adaptive control of superheat

• Adaptive defrosting based on evaporator performance

• Start of defrost via schedule, digital input or network

• Natural, electric or hot gas defrost

• Stop of defrost on time and/or temperature

• Coordination of defrosting among several controls

• Pulsing of fans when thermostat is satisfied

• Appliance cleaning function for documentation of HACCP procedure

• Rail heat control via day/night load or dew point

• Door function

• Control of two compressors

• Control of night blinds

• Light control

• Heat thermostat

• Factory calibration that will guarantee a better measuring accuracy than stated in the standard EN 441-13 without subsequent calibration (Pt 1000 ohm sensor)

• Integrated MODBUS communication with the option of mounting a LonWorks communication card

Appliance examples

Contents

Introduction ....................................................................................................... 2

Operation ............................................................................................................ 4

Applications .....................................................................................................12

Survey of functions ........................................................................................15

Operation ..........................................................................................................26

Menu survey .....................................................................................................28

Connections .....................................................................................................32

Data .....................................................................................................................34

Ordering ............................................................................................................35

2 Manual RS8FS502 © Danfoss 2016-09

Applications

Here is an overview of the controller’s usage options.

A setting will configure input and outputs so that the controller’s operation interface is directed at the selected application.

The current settings for the respective uses can be found on page

28.

Application 1-8

These uses are applied to standard appliances or cold storage rooms with one valve, one evaporator and one refrigeration section.

The sensors are used according to standard principles.

The output functions change depending on the selected application.

Application 9

This use is for refrigeration appliances with one valve, two evaporators and two refrigeration sections.

Here the temperature and alarm monitoring are always controlled using the S4 sensor.

The S3 sensor is used for display readings.

The product sensor is replaced by an extra defrosting sensor S5B for the second evaporator.

Application 10

This use is for refrigeration appliances with one valve, one evaporator and two refrigeration sections.

Here temperature is always controlled using the S4 temperature.

The two S3 temperatures are used for alarm monitoring and display readings for each refrigeration section. There are common alarm limits for the two refrigeration section.

Manual RS8FS502 © Danfoss 2016-09 3

Operation

Liquid injection

Liquid injection in the evaporator is controlled by an electronic injection valve of the type AKV. The valve functions as both expansion valve and solenoid valve. The valve opens and closes using signals from the controller.

The function contains an adaptive algorithm which independently adjusts the valve’s opening so that the evaporator constantly supplies optimum refrigeration.

Superheat can be measured via:

• Pressure sensor P0 and temperature sensor S2

For this use a correct measurement of superheat is achieved under all conditions which ensures a very robust and precise control.

The signal from one pressure transmitter can be used by several controllers, but only if there is no significant pressure difference between the evaporators in question.

Temperature control

The temperature in the appliance is registered by one or two temperature sensors which are located in the air flow before the evaporator (S3) or after the evaporator (S4) respectively. A setting for the thermostat, alarm thermostat and display reading determines how much the two sensor values should influence each individual function, e.g. 50% will produce an equal value from both sensors.

The actual temperature control can take place in two ways: as an ordinary ON/OFF regulation with a differential, or as a modulating control there the temperature variation will not be nearly as great as in ON/OFF control. There is however a limit to the use of a modulating control as it can only be used in central plant. In a decentralised plant the thermostat function with ON/OFF control should be selected.

In a central plant the thermostat function may either be selected for ON/OFF control or modulating control.

Temperature monitoring

Just as is possible for the thermostat, the alarm monitoring can be set with a weighting between S3 and S4 so that you can decide how much the two sensor values should influence the alarm monitoring. Minimum and maximum limits can be set for alarm temperature and time delays. A longer time delay can be set for high temperature alarm. This time delay is active after defrosting, appliance cleaning and start-up.

4 Manual RS8FS502 © Danfoss 2016-09

Thermostat bands

Thermostat bands can be used beneficially for appliances where different product types are stored which require different temperature conditions. It is possible to change between the two different thermostat bands via a contact signal on a digital input.

Separate thermostat and alarm limits can be set for each thermostat band – also for the product sensor.

Night setback of thermostat value

In refrigeration appliances there may be big load differences between the shop’s opening and closing hours, especially if night lids/blinds are used. The thermostat reference may be raised here without it having any effect on the product temperature.

Change-over between day and night operation can take place, as follows:

• via an external switch signal.

• via a signal from the data communication system.

Product sensor

A separate optional product sensor S6, which may be placed in the appliance, can also be used and which can register and monitor the temperature in the warmest part of the appliance.

There are separate alarm limits and time delays for the product sensor.

Appliance cleaning

This function makes it easy for the shop’s staff to carry out a cleaning of the appliance according to a standard procedure.

Appliance cleaning is activated via a signal – as a rule via a key switch placed on the appliance.

Appliance cleaning is carried out via three phases:

1 - at the first activation the refrigeration is stopped, but the fans keep on operating in order to defrost the evaporators. ”Fan” is shown on the display.

2 - at the second activation the fans are also stopped and the appliance can now be cleaned. ”OFF” is shown on the display.

3 - At the third activation refrigeration is recommenced. The display will show the actual appliance temperature, (o97 setting).

When appliance cleaning is activated a cleaning alarm is transmitted to the normal alarm recipient. A later processing of these alarms will document that the appliance has been cleaned as often as planned.

Alarm monitoring

There are no temperature alarms during appliance cleaning.

Appliance shut-down

The function closes the AKV valve and all outputs are switched off.

The cooling appliance is stopped like the “Main switch”, but this happens without an “A45 standby alarm”.

The function can be enabled by a switch on the DI input or via a setting through data communication.

-

1

2

3

+

÷

÷

+

+

+

÷

+

°C

Fan

Off

°C

Manual RS8FS502 © Danfoss 2016-09 5

Defrost

Depending on the application you may choose between the following defrost methods:

Natural: Here the fans are kept operating during the defrost

Electric: The heating element is activated

Hotgas: Here the solenoid valves are controlled so that the hotgas can flow through the evaporator

Defrost sequence

1) Pump down

2) Defrost

3) Waiting position after defrost

4) Draining (drain delay. Hotgas only)

5) Drip off

6) Delay of fan

Hot gas defrost (application 6 only)

This type of connection can be used on systems with hotgas defrost, but only in small systems in, say, supermarkets – the functional content has not been adapted to systems with large charges.

Relay 2 is used for the suction valve

Relay 4’s change-over function is used by the bypass valve and hot gas valve, respectively.

If the valves PMLX and GPLX are used, the delay time “d23” will have to be properly set.

During hot gas defrosting, it is not possible to start a manual defrosting cycle with the “DI” functions or with a touch on the controller’s lower button.

Hot gas application

Drip tray heating element

It is possible to control a heating element in the drip tray for hot gas defrosting. When defrosting is commenced, the heating element is activated. The heating element remains activated until a set time after defrosting has ended by time or temperature.

Start of defrost

A defrost can be started in different ways

Interval: Defrost is started at fixed time intervals, say, every

eighth hour. An interval must ALWAYS be set to a "higher" value than the period set between two defrostings when a schedule or network signal is used.

Refrigeration time: Defrost is started at fixed refrigeration time intervals, in other words, a low need for refrigeration will

”postpone” the defrost

Schedule: Here defrost can be started at fixed times of the

day and night. However, max. 6 times

Contact: Defrost is started with a contact signal on a digital input

Network: The signal for defrost is received from a system unit via the data communication

Adaptive defrost: Here defrosting is started based on intelligent registering of evaporator performance.

Manual: An extra defrost can be activated from the controller’s lower-most button (though, not with application 6) or via a parameter setting.

All the mentioned methods can be used at random – if just of them is activated a defrost will be started.

Stop of defrost

Defrosting can be stopped by either:

• Time

• Temperature (with time as safety).

Compressor

If the defrosting method is set to “Gas,” the compressor will be “On” during the defrost cycle.

6 Manual RS8FS502 © Danfoss 2016-09

Coordinated defrost

There are two ways in which coordinated defrost can be arranged.

Either with wire connections between the controllers or via data communication

Wire connections

The digital input DI2 is connected between the current controllers.

When one controller starts a defrost all the other controllers will follow suit and likewise start a defrost. After the defrost the individual controllers will move into waiting position. When all are in waiting position there will be a change-over to refrigeration.

Coordination via data communication

Here the system unit handles the coordination.

The controllers are gathered in defrosting groups and the system unit ensures that defrosting is started in the group according to a weekly schedule.

When a controller has completed defrosting, it sends a message to the system unit and then goes into a waiting position. When every controller in the group is in a waiting position, refrigeration is again permitted in all the individual controllers.

System manager

Max. 10

Defrost on demand

1 Based on refrigeration time

When the aggregate refrigeration time has passed a fixed time, a defrost will be started. (The function is not activated if the adaptive defrosting has been set to 2, 3 or 4.)

Adaptive defrosting:

This function assesses the need for defrosting on the basis of the airflow through the appliance. It may even start a defrost and may even cancel a scheduled defrost.

The following functions can be selected:

0 Off

1 Monitoring

A value is calculated for the evaporator air flow here.

An alarm will be triggered in the case of icing up or flash gas.

2 Adaptive day (can replace one defrost per day).

This setting can be used if the appliance does not have a blind or lid during the day, and blinds or lids are used at night.

A value is calculated for the day evaporator air flow.

The evaporator is monitored during the day only, and the next scheduled defrost is carried out if required.

If the function does not require a defrost at the time of the scheduled defrost during the day, the defrost will not be carried out.

All scheduled and DI defrosts are carried out during the night.

3 Adaptive day and night (can replace defrosting both day and night).

This setting can be used if the appliance has a door or a sliding door, or it is completely uncovered both day and night.

The setting is also recommended for rooms.

A value is calculated for the evaporator air flow.

The evaporator is monitored, and the next scheduled defrost will be carried out as required.

If the function does not require a defrost at the time of the scheduled defrost, the defrost will not be carried out.

Melting function

This function will stop the air flow in the evaporator from being reduced by frost created by uninterrupted operation for a long time.

The function is activated if the thermostat temperature has remained in the range between -5°C and +10°C for a longer period than the set melting interval. The refrigeration will then be stopped during the set melting period. The frost will be melted so that the air flow and hence the evaporator’s capacity will be greatly improved.

4 Full adaptive (can start an extra defrost).

This setting can be used if the appliance has a door or a sliding door, or it is completely uncovered both day and night. The setting is also recommended for rooms.

A value is calculated for the evaporator air flow.

The evaporator is monitored, and a defrost will be carried out as required regardless of schedules.

All scheduled defrosts will also be carried out.

Adaptive defrosting requires the following connections:

- Expansion valve type AKV

- Temperature signal from both S3 and S4

- Temperature signal from the condensing pressure Pc which is distributed via the network from a system manager. The value should show the pressure in front of AKV valve. On plants where each part is not representative is the signal from system manager not be used. Here, the controller uses a constant.

NOTE. The S3 and S4 sensors must be placed in the air flow/channel immediately before/after the evaporator.

Note

The function "Adaptive defrost” should only be activated when the evaporator runs under normal operational conditions.

Min. time between defrosts

There is a 2 hours minimum time between defrosts.

This avoids that planned defrosts in accordance with the weekly schedule or DI signal are carried out immediately after a defrost on demand has been carried out. The time applies from when a defrost on demand has been completed to when a planned defrost is again permitted. The defrost on demand will not start defrosting with a shorter interval than the 2 hours either.

Real-time clock

The controller has a built-in real-time clock which can be used to start defrosts. This clock has a power reserve of four hours.

If the controller is equipped with data communication, the clock will automatically be updated from the system unit.

Manual RS8FS502 © Danfoss 2016-09 7

Control of two compressors (application 5)

The two compressors must be of the same size. When the controller demands refrigeration it will first cut in the compressor with the shortest operating time. After the time delay the second compressor will be cut in.

When the temperature has dropped to ”the middle of the differential”, the compressor with the longest operation time will be cut out.

The running compressor will continue until the temperature has reached the cutout value. Then it will cut out. When the temperature again reaches the middle of the differential, a compressor will again be started.

If one compressor cannot maintain the temperature within the differential, the second compressor will also be started.

If one of the compressors has run on its own for two hours, the compressors will be changed over so that operational time is balanced.

The two compressors must be of a type that can start up against a high pressure.

The compressors’s settings for ”Min On time” and ”Min Off time” will always have top priority during normal regulation. But if one of the override functions is activated, the ”Min On time” will be disregarded.

Railheat

It is possible to pulse-control the power to the rail heat in order to save energy. Pulse control can either be controlled according to day/night load or dew point.

Pulse control according to day and night

Various ON periods can be set for day and night operation.

A period time is set as well as the percentage part of the period in which the rail heat is ON.

Pulse control according to dew point

In order to use this function a system manager of the type AK-SM is required which can measure dew point and distribute the current dew point to the appliance controllers. For this the rail heat’s

ON period is controlled from the current dew point.

Two dew point values are set in the appliance control:

• One where the effect must be max. i.e.100%. (o87)

• One where the effect must be min. (o86).

At a dew point which is equal to or lower than the value in 086, the effect will be the value indicated in o88.

In the area between the two dew point values the controller will manage the power to be supplied to the rail heat.

During defrosting

During defrosting rail heat will be active, as selected in setting d27.

Rail heat

Dew point

8 Manual RS8FS502 © Danfoss 2016-09

Fan

Pulse control

To obtain energy savings it is possible to pulse control the power supply to the fans at the evaporators.

Pulse control can be accomplished in one of the following ways:

- during the thermostat’s cutout period (cold room)

- during night operation and during the thermostat’s cutout period (appliance with night lid)

(The function is not actual when r14=2, i.e. modulating regulation).

A period of time is set as well as the percentage of this period of time where the fans have to be operating.

Cutout of fans during plant breakdowns

If the refrigeration in a breakdown situation stops, the temperature in the cold room may rise quickly as a result of the power supply from large fans. In order to prevent this situation the controller can stop the fans if the temperature at S5 exceeds a set limit value.

Light function

The function can be used for controlling the light in a refrigeration appliance or in a cold room. It can also be used for controlling a motorised night blind.

The light function can be defined in three ways:

- the light is controlled via a signal from a door contact. Together with this function a time delay can be set so that the light is kept on for a period of time after the door has been closed.

- the light is controlled via the day/night function

- the light is controlled via the data communication from a system unit.

Here there are two operational options if data communication should fail:

- The light can go ON

- The light can stay in its current mode.

The light load must be connected to the NC switch on the relay.

This ensures that the light remains on in the appliance if power to the controller should fail.

The light is switched off when "r12" (Main switch) is set to off (see o98).

The light is switched off when the appliance cleaning function is activated.

Night blind

Motorised night blind can be controlled automatically from the controller. The night blinds will follow the status of the light function. When the light is switched on, the night blinds opens and when the light is switched off, the night blinds close again.

When the night blinds are closed, it is possible to open them using a switch signal on the digital input. If this pulse signal is activated, the night blinds will open and the refrigeration appliance can be filled with new products. If the pulse signal is activated again, the blinds close again.

When the night blind function is used, the thermostat function can control with different weighting between the S3 and S4 sensors. A weighting during day operation and another when the blind is closed.

A night blind is open when the appliance cleaning function is activated.

A setting can define that the night blind is open when "r12" (Main switch) is set to off (see o98).

When the night blind rolls down, the fan will be stopped for

2 minutes. The night blind can thereby roll down to the correct position.

Manual RS8FS502 © Danfoss 2016-09

Period time

9

Digital inputs

There are two digital inputs DI1 and DI2 with contact function and one digital input DI3 with high voltage signal.

They can be used for the following functions:

- Retransmission of contacts position via data communication

- Door contact function with alarm

- Starting a defrost

- Main switch - start/stop of cooling

- Night setback

- Thermostat bands switch

- General alarm monitoring

- Appliance cleaning

- Case shut down

- Forced cooling

- Override of night blinds

- Coordinated defrost (DI2 only)

- Forced closing of valve (DI 3 only)

Forced closing

The AKV valves can be closed with an external signal ( "Forced closing").

The function must be used in connection with the compressor’s safety circuit, so that there will be no injection of liquid into the evaporator when the compressor is stopped by the safety controls. (However not at low pressure – LP).

If a defrost cycle is in progress, the forced closing status will not be re-established until the defrost is completed. Otherwise, the defrost cycle is stopped immediately once the signal is received.

The function is defined in o90. The signal can be received from the

DI3-input or via the data communication.

During a forced closing the fans can be defined to be stopped or in operation.

Door contact

The door contact function can via the digital inputs be defined for two different applications:

Alarm monitoring

The controller monitors the door contact and delivers an alarm message if the door has been opened for a longer period than the set alarm delay.

Alarm monitoring and stop of refrigeration

When the door is opened the refrigeration is stopped, i.e. the injection, the compressor and the fan are stopped and light switch on.

If the door remains open for a longer time than the set restart time, refrigeration will be resumed. This will ensure that refrigeration is maintained even if the door is left open or if the door contact should be defective. If the door remains open for a longer period than the set alarm delay an alarm will also be triggered.

Heating function

The heating function is used to prevent the temperature becoming too low, e.g. in a cutting room, etc. The limit for when the heating function cuts off is set as an offset value under the current cutout limit for the refrigeration thermostat. This ensures that refrigeration and heating do not occur simultaneously.

The difference for the heating thermostat has the same value as for the refrigeration thermostat. To prevent that the heating thermostat cuts in during short-term drops in air temperature a time delay can be set for when to change from refrigeration to heating.

Refrigeration

Neutral zone

Heat

10 Manual RS8FS502 © Danfoss 2016-09

Data communication

The controller has fixed built-in MODBUS data communication.

If there is a requirement for a different form of data communication, a Lon RS 485 or DANBUSS module can be inserted in the controller.

The connection must then be to terminal RS 485.

(To use a Lon RS 485 module and gateway type AKA 245 the AKA

245 must be Version 6.20 or higher.)

Display

The controller has one plug for a display. Here display type EKA

163B or EKA 164B (max. length 15m) can be connected.

EKA 163B is a display for readings.

EKA 164B is both for readings and operation.

The connection between display and controller may be with a cable which has a plug at both ends.

If the distance between display and controller is greater than 15 m, the connection must take another form.

An extra module must also be mounted in the controller if data communication is used.

The built-in MODBUS data communication is used so that the display connection and the data communication to the other controllers must take place via a module. The module can be:

Lon RS 485, DANBUSS or MODBUS.

When a display is to be connected to the built-in MODBUS, the display can advantageously be changed to one of the same type, but with Index A (version with screw terminals).

The controllers address must be set higher than 0 in order for the display to be able to communicate with the controller.

If connection of two displays is required, one must be connected to the plug (max. 15 m) and the other must then be connected to the fixed data communication.

Important

All connections to the data communication MODBUS, DANBUSS and RS 485 must comply with the requirements for data communication cables. See literature: RC8AC.

! Address

o03 > 0

Override

The controller contains a number of functions which can be used together with the override function in the master gateway/system manager.

Function via data communication Function in gateway/system manager Used parameters in AK-CC 550A

Start of defrosting

Coordinated defrost

Prevent defrost start

Day/Night schedule

Light control

Forced closing

Forced cooling

Railheat link to dew point

P0 optimization

Adaptive defrost

Defrost control / Time schedule / Defrost group

Defrost control / Defrost group

Day/Night control / Time schedule / Light zone

Day/Night control / Time schedule

Forced Close / Injection ON / AKC ON

/ Enhanced railheat

P0 Optimization

/ Adaptive defrost. System manager only

--- Def start

--- HoldAfterDef / - - - DefrostState

--- Disable Def

--- Night setback

O39 light Remote

--- Forced cl.

--- Forced cool

--- Dew point

The controller supports P0 optimization

- - - Tc TempMean, MC Def.start

Manual RS8FS502 © Danfoss 2016-09 11

Applications

Here is a survey of the controller’s field of application.

A setting will define the relay outputs so that the controller’s interface will be targeted to the chosen application.

On page 28 you can see the relevant settings for the respective wiring diagrams.

S3 and S4 are temperature sensors. The application will determine whether either one or the other or both sensors are to be used. S3 is placed in the air flow before the evaporator. S4 after the evaporator.

A percentage setting will determine how the control is to be based. S5 is a defrost sensor and is placed on/in the fins of the evaporator.

S6 is a product sensor, but in application 9 and 10 it has a different use.

DI1, DI2 and DI3 are contact functions that can be used for one of the following functions: door function, alarm function, defrost start, external main switch, night operation, change of thermostat reference, appliance cleaning, forced refrigeration or coordinated defrost. DI3 has a 230 V input. See the functions in settings o02, o37and o84.

General:

The ten uses are all adapted for commercial refrigeration systems in the form of either refrigeration appliances or cold storage rooms.

In general all have outputs for:

• AKV valve

• Fan

• Defrost

In addition they have different uses and thereby input and outputs.

Application 1-4

Standard applications.

This is for standard use where the vital difference is only different combinations of the following functions/outputs:

• Alarm

• Rail heat

• Compressor

• Light

1

2

3

4

12 Manual RS8FS502 © Danfoss 2016-09

The following uses have some special functions which in brief are:

Application 5

”Two-compressor” operation.

The two compressors must be of the same size.

On start-up (after defrosting, operational stop, etc.) both compressors are started with a set time shift. One compressor starts at half the differential so that an optimum adaptation of compressor capacity takes place for the current load in the appliance/room. There is automatic runtime equalisation between the compressors.

For a more detailed description please refer to earlier sections in the manual.

Application 6

Hot gas defrosting.

Hot gas defrosting is adapted to commercial appliances/rooms with limited system filling.

One relay controls the main valve in the suction line.

A changeover relay controls both the hot gas valve and the drain valve.

This means that there is no time delay between stops of hot gas and start of draining.

Application 7

Control of night blinds

Night blinds follow the status of the light function

– when the light is switched on, the night blinds are up and when the light is switched off, the night blinds are down. In addition a digital input provides the option of forced opening of the blinds so that the appliance can be filled with products.

Application 8

Heat thermostat

The heat thermostat is typically used if the temperature is to be controlled within narrower limits, e.g. for cutting rooms, etc. The heating thermostat can be set as a difference in relation to the cutout limit for the refrigeration thermostat so that simultaneous refrigeration and heating are avoided.

Application 9

Two refrigeration sections – two defrost outputs

This application is for refrigeration appliances with one valve, two evaporators and two refrigeration sections. The temperature is controlled and is always alarm monitored according to the S4 temperature. For this the product sensor is used as a defrosting stop sensor for evaporator no. 2.

Application 10

Two refrigeration sections – individual alarm/ display via S3

This application is for refrigeration appliances with one valve, one evaporator and two refrigeration sections. The temperature is always controlled according to the S4 temperature. The product sensor is used as an extra S3 sensor for section no. 2. Alarm monitoring and display readings take place individually via the "S3" sensors in each refrigeration section.

5

6

7

8

9

10

Manual RS8FS502 © Danfoss 2016-09 13

Connection signs

The controller is provided with signs from the factory indicating application 1.

If you employ another use, signs are provided so that you can mount the relevant one. It is only the lower sign that needs to be mounted.

The number is indicated on the left-hand side of the signs. Use the sign with the current application number. One of the signs applies to both applications 4 and 10.

14 Manual RS8FS502 © Danfoss 2016-09

Survey of functions

Function

Normal display

Normally the temperature value from one of the two thermostat sensors S3 or S4 or a mixture of the two measurements is displayed.

In o17 the ratio is determined.

Thermostat

Set point

Regulation is based on the set value plus a displacement, if applicable. The value is set via a push on the centre button.

The set value can be locked or limited to a range with the settings in r02 and r 03.

The reference at any time can be seen in "u91 Cutout temp".

Differential

When the temperature is higher than the reference + the set differential, the compressor relay will be cut in. It will cut out again when the temperature comes down to the set reference.

Para- meter

Parameter by operation via data communication

r01

Display air (u56)

Thermostat control

Cutout °C

Differential

Ref. Dif.

Setpoint limitation

The controller’s setting range for the setpoint may be narrowed down, so that much too high or much too low values are not set accidentally - with resulting damages.

To avoid a too high setting of the setpoint, the max. allowable reference value may be lowered.

To avoid a too low setting of the setpoint, the min. allowable reference value may be increased.

Correction of the display’s temperature

If the temperature at the products and the temperature received by the controller are not identical, an offset adjustment of the display temperature can be carried out.

Temperature unit

Set here if the controller is to show temperature values in °C or in °F.

Correction of signal from S4

Compensation possibility due to long sensor cable

Correction of signal from S3

Compensation possibility due to long sensor cable

Start / stop of refrigeration

With this setting refrigeration can be started, stopped or a manual override of the outputs can be allowed. (For manual control the value is set at -1. Then the AKV outlet and the relay outlets can be force-controlled by the respective reading parameters

(u23, u58, etc.). Here the read value can be overwritten.)

Start / stop of refrigeration can also be accomplished with the external switch function connected to a DI input.

Stopped refrigeration will give a ”Standby alarm”.

Night setback value

The thermostat’s reference will be the setpoint plus this value when the controller changes over to night operation. (Select a negative value if there is to be cold accumulation.)

Thermostat function

Here it is defined how the thermostat is to operate. Either as an ordinary ON/OFF thermostat or as a modulating thermostat.

1: ON/OFF thermostat

2: Modulating

When operation is ”modulating” the AKV valve will limit the flow of refrigerant so that the temperature variation will be less than for the ON/OFF thermostat.

The differential (r01) must not be set lower than 2K for "modulating".

In a decentralised plant you must select the ON/OFF thermostat setting.

Selection of thermostat sensor

Here you define the sensor the thermostat is to use for its control function. S3, S4, or a combination of them. With the setting 0%, only S3 is used (Sin). With 100%, only S4.

r02 r03 r04 Disp. Adj. K r05 r09 Adjust S4 r10 r12 r13 r14 r15

Max cutout °C

Min cutout °C

Temp. unit

°C=0. / °F=1

(Only °C on AKM, whatever the setting)

Adjust S3

Main Switch

1: Start

0: Stop

-1: Manual control of outputs allowed

Night offset

Therm. mode

Ther. S4 %

Manual RS8FS502 © Danfoss 2016-09 15

Melt function

Only for control of refrigeration (-5 to +10°C). The function ensures that the evaporator will not be blocked by frost. Here you set how often the function is to stop the refrigeration and hence transform the frost to water (or ice if there is too much frost).

Melt period

Here you set how long an on-going melt function is to last.

Set point 2

The thermostat’s cutout value when the thermostat band 2 is activated via a digital input.

Correction of signal from S6

Compensation possibility due to long sensor cable

Selection of thermostat sensor S4% during night operation

Here you define the sensor the thermostat is to use for its control function. S3, S4, or a combination of them. With the setting 0%, only S3 is used (Sin). With 100%, only S4.

Heat function

Set the size of the Neutral Zone for changeover from cooling to heating

Time delay on transition from refrigeration phase to heating phase.

(there is not time delay on transition from heating phase to refrigeration phase).

r16 r17 r21 r59 r61 r62 r63

MeltInterval

Melt period

Cutout2 temp

Adjust S6

Ther.S4% Ngt

Heat NZ

HeatStartDel

Alarm

The controller can give alarm in different situations. When there is an alarm all the light-emitting diodes (LED) will flash on the controller front panel, and the alarm relay will cut in.

Alarm delay (short alarm delay on air temperature)

If the upper or the lower alarm limit values are exceeded, a timer function will commence. The alarm will not become active until the set time delay has been passed.

The time delay is set in minutes.

Time delay for door alarm

The time delay is set in minutes.

The function is defined in o02 , o37 or in o84.

Time delay for cooling (long alarm delay)

This time delay is used during start-up, during defrost, and after a Appliance cleaning.

There will be change-over to the normal time delay (A03) when the temperature has dropped below the set upper alarm limit.

The time delay is set in minutes.

Upper alarm limit

Here you set when the alarm for high temperature is to start. The limit value is set in

°C (absolute value).

The limit value will be raised during night operation. The value is the same as the one set for night setback, but will only be raised if the value is positive.

Lower alarm limit

Here you set when the alarm for low temperature is to start. The limit value is set in °C

(absolute value).

Upper alarm limit for thermostat 2 (Thermostat band 2)

(Same function as for thermostat 1)

Lower alarm limit for thermostat 2 (Thermostat band 2)

(Same function as for thermostat 1)

Upper alarm limit for S6 temperature at thermostat 1

Lower alarm limit for S6 temperature at thermostat 1

Upper alarm limit for S6 temperature at thermostat 2 (Thermostat band 2)

Lower alarm limit for S6 temperature at thermostat 2 (Thermostat band 2)

S6 temperature alarm delay

The alarm is activated if one of the relevant alarm limits A22, A23, A24 or A25 is exceeded. The time delay is set in minutes.

(Alarms will not activate when the setting is set to the maximum value.)

Delay of a DI1 alarm

A cut-out/cut-in input will result in alarm when the time delay has been passed. The function is defined in o02.

Delay of a DI2 alarm

A cut-out/cut-in input will result in alarm when the time delay has been passed. The function is defined in o37

Night setbck

(start of night signal. 0=Day, 1=Night)

Forced cool.

(start of forced cooling)

Forced close

(Forced stop of cooling)

Alarm settings

With data communication the importance of the individual alarms can be defined. Setting is carried out in the

“Alarm destinations” menu via AKM.

A03 Alarm delay

A04 DoorOpen del

A12 Pulldown del

A13 HighLim Air

A14 LowLim Air

A20

A21

HighLim2 Air

LowLim2 Air

A22 HighLim1 S6

A23 LowLim1 S6

A24 HighLim2 S6

A25 LowLim2 S6

A26 Al. Delay S6

A27 AI.Delay DI1

A28 AI.Delay DI2

16 Manual RS8FS502 © Danfoss 2016-09

Signal to the alarm thermostat

Here you have to define the ratio between the sensors which the alarm thermostat has to use. S3, S4 or a combination of the two.

With setting 0% only S3 is used. With 100% only S4 is used

Time delay on S6 (product sensor) for pull-down (long alarm delay)

This time delay is used for start-up, during defrosting, immediately after a defrost and after an appliance clean.

A change is carried out to standard time delay (A26) when the temperature has reached below the set upper alarm limit.

The time delay is set in minutes.

A36

A52

Alarm S4%

PullD del.S6

Reset alarm

Ctrl. Error (EKC error)

Compressor control Compressor

The compressor relay works in conjunction with the thermostat. When the thermostat calls for refrigeration the compressor relay be operated.

Running times

To prevent irregular operation, values can be set for the time the compressor is to run once it has been started. And for how long it at least has to be stopped.

The running times are not observed when defrosts start.

Min. ON-time (in minutes)

Min. OFF-time (in minutes)

Time delay for couplings of two compressors

Settings indicate the time that has to elapse from the first relay cuts in and until the next relay has to cut in.

The LED on the controller’s front will show whether refrigeration is in progress.

c01 c02 c05

Min. On time

Min. Off time

Step delay

Defrost

The controller contains a timer function that is zeroset after each defrost start.

The timer function will start a defrost if/when the interval time is passed.

The timer function starts when voltage is connected to the controller, but it is displaced the first time by the setting in d05.

If there is power failure the timer value will be saved and continue from here when the power returns.

This timer function can be used as a simple way of starting defrosts, but it will always act as safety defrost if one of the subsequent defrost starts is not received.

The controller also contains a real-time clock. By means of settings of this clock and times for the required defrost times, defrost can be started at fixed times of the day.

Defrost start can also be accomplished via data communication, via contact signals or manual start-up.

All starting methods will function in the controller. The different functions have to be set, so that multiple defrosts are avoided..

Defrost can be accomplished with electricity, hotgas or brine.

The actual defrost will be stopped based on time or temperature with a signal from a temperature sensor.

Defrost method

Here you set whether defrost is to be accomplished with electricity, gas, or (none).

During defrost the defrost relay will be cut in.

d01 Def. method

0 = off

1 = El

2 = Gas d02 Def. Stop Temp

Defrost stop temperature

The defrost is stopped at a given temperature which is measured with a sensor (the sensor is defined in d10).

The temperature value is set.

u58 comp7/LLSV

Here you can read the status of the compressor relay.

Defrost control

Manual RS8FS502 © Danfoss 2016-09 17

Interval between defrost starts

The function is zeroset and will start the timer function at each defrost start. When the time has expired the function will start a defrost.

The function is used as a simple defrost start, or it may be used as a safeguard if the normal signal fails to appear.

If master/slave defrost without clock function or without data communication is used, the interval time will be used as max. time between defrosts.

If a defrost start via data communication does not take place, the interval time will be used as max. time between defrosts.

When there is defrost with clock function or data communication, the interval time must be set for a somewhat longer period of time than the planned one, as the interval time will otherwise start a defrost which a little later will be followed by the planned one.

In connection with power failure the interval time will be maintained, and when the power returns the interval time will continue from the maintained value.

The interval time is not active when set to 0.

Max. defrost duration

This setting is a safety time so that the defrost will be stopped if there has not already been a stop based on temperature or via coordinated defrost.

(The setting is the defrost time if d10 is set to 0.)

Time staggering for defrost cut ins during start-up

The function is only relevant if you have several refrigeration appliances or groups where you want the defrost to be staggered in relation to one another. The function is furthermore only relevant if you have chosen defrost with interval start (d03).

The function delays the interval time d03 by the set number of minutes, but it only does it once, and this at the very first defrost taking place when voltage is connected to the controller.

The function will be active after each and every power failure.

Drip-off time

Here you set the time that is to elapse from a defrost and until the compressor is to start again. (The time when water drips off the evaporator).

Delay of fan start after defrost

Here you set the time that is to elapse from compressor start after a defrost and until the fan may start again. (The time when water is “tied” to the evaporator).

Fan start temperature

The fan may also be started a little earlier than mentioned under “Delay of fan start after defrost”, if the defrost sensor S5 registers a lower value than the one set here.

Fan cut in during defrost

Here you can set whether fan is to operate during defrost.

0: Stopped (Runs during pump down)

1: Running (stopped during "fan delay")

2: Running during pump down and defrost. After that stopped

Defrost sensor

Here you define the defrost sensor.

0: None, defrost is based on time

1: S5

2: S4

3: Sx. For application 1 to 8 and 10 defrosting is stopped when both S5 and S6 have reached the set temperature (Both sensors must be located on the evaporator).

For application 9 defrosting is stopped individually on the two sections of S5 /

S5B

Pumpdown delay

Set the time where the evaporator is emptied of refrigerant prior to the defrost.

Drain delay (only in connection with hotgas)

Set the time where the evaporator is emptied of condensed refrigerant after the defrost.

Defrost on demand – aggregate refrigeration time

Set here is the refrigeration time allowed without defrosts. If the time is passed, a defrost will be started.

With setting = 0 the function is cut out.

Delay on stop of heating in the drip tray

The time applies from the time the defrost stops by time or temperature to the time the heating element in the drip tray needs to be disconnected.

Adaptive defrosting

An adaptive defrosting is an extra defrost in addition to the scheduled defrosts or a cancellation of a scheduled defrost.

Here the adaptive defrost is set for when it can come into operation if the need arises:

0: Never,

1: Never, but triggers an alarm in the case of icing up

2: Cancellation of day schedule is permitted. Night schedule is carried out

3: Cancellation of day schedule is permitted. Cancellation of night schedule is permitted

4: All schedules are carried out + extra if it is registered that it is required.

(Reset: Temporary setting to 0 will reset the recorded values and start a new calculation of the evaporator air flow.)

18 Manual RS8FS502 © Danfoss 2016-09 d03 Def Interval

(0=off) d04 Max Def. time d05 Time Stagg.

d06 DripOff time d07 FanStartDel d08 FanStartTemp d09 FanDuringDef d10 DefStopSens.

d16 Pump dwn del.

d17 Drain del d18 MaxTherRunT d20 Drip Tray del d21 AD mode

Time delay before opening of hot gas valve, so a PMLX valve can close.

Rail heat during defrost

0=off. 1=on. 2=Pulsating

Max. duration of -d- in the display

Controls the readout of "-d-" after defrost, thus "-d-" is shown until the temperature is ok, set delay has expired, or a temperature alarm will occur.

If you wish to see the temperature at the defrost sensor, push the controller’s lowermost button. (May be changed to another function in o92.)

If you wish to start an extra defrost, push the controller’s lowermost button for four seconds.

You can stop an ongoing defrost in the same way d23 d27 d40

HotGasInjDel

Railh. at def.

Disp. d del.

Defrost temp.

Def Start

Here you can start a manual defrost

Hold After Def

Shows ON when the controller is operating with coordinated defrost.

Disable def.

Defrost in progress can be stopped

Defrost State

Status on defrost

1= pump down / defrost

Parameter for cooling function

Max. value for the superheat reference

Min. value for the superheat reference

MOP temperature

If no MOP function is required, select pos. OFF

AKV valve’s time period in seconds

Should only be set to a lower value if it is a decentralised plant and the suction pressure fluctuates a lot and in line with the opening of the AKV valve.

Fan

Fan stop temperature

The function stops the fans in an error situation, so that they will not provide power to the appliance. If the defrost sensor registers a higher temperature than the one set here, the fans will be stopped. There will be re-start at 2 K below the setting.

The function is not active during a defrost or start-up after a defrost.

With setting +50°C the function is interrupted.

Pulse operation of fan

0: No pulse operation

1: Pulse operation when the thermostat does not call for refrigeration

2: Pulse operation when the thermostat does not call for refrigeration, but only during night operation

Pulse operation period for fan

Here the overall pulse time is set. The sum of ON-to and OFF time.

ON time for fan

Here the % part of the period the fans are to be in operation is set.

The LED on the controller’s front will indicate whether a defrost is going on.

n09 Max SH n10 Min SH n11 MOP temp n13

F04

F05

(A value of 15 corresponds to OFF)

AKV Period

Fan control

FanStopTemp.

FanPulseMode

Internal defrosting schedule/clock function

(Not used if an external defrosting schedule is used via data communication.)

Up to six individual times can be set for the defrost start throughout the day.

Defrost start, hour setting

Defrost start, minute setting (1 and 11 belong together, etc.)

When all t01 to t16 equal 0 the clock will not start defrosts.

Real-time clock::

Setting the clock is only necessary when there is no data communication.

In the event of a power failure of less than four hours, the clock function will be saved.

Clock: Hour setting

Clock: Minute setting

Clock: Date setting t01-t06 t11-t16 t07 t08 t45

F06 Fan cycle

F07 Fan ON % u59 Fan Relay

Here you can read the fan relay status, or force-control the relay in “Manual control” mode.

Manual RS8FS502 © Danfoss 2016-09 19

Clock: Month setting

Clock: Year setting

Miscellaneous

Delay of output signal after start-up

After start-up or a power failure the controller’s functions can be delayed so that overloading of the electricity supply network is avoided.

Here you can set the time delay.

Digital input signal - DI1

The controller has a digital input 1 which can be used for one of the following functions:

Off: The input is not used

1) Status display of a contact function

2) Door function. When the input is open it signals that the door is open. The refrigeration and the fans are stopped and light switched on. When the time setting in

“A04” is passed, an alarm will be given and refrigeration will be resumed (o89).

3) Door alarm. When the input is open it signals that the door is open. When the time setting in “A04” is passed, there will be alarm.

4) Defrost. The function is started with a pulse signal. The controller will register when the DI input is activated. The controller will then start a defrost cycle.

5) Main switch. Regulation is carried out when the input is short-circuited, and regulation is stopped when the input is put in pos. OFF.

6) Night operation. When the input is short-circuited, there will be regulation for night operation.

7) Thermostat band changeover. Switch to thermostat 2 (r21).

8) Separate alarm function. Alarm will be given when the input is short-circuited.

9) Separate alarm function. Alarm will be given when the input is opened. (For 8 and

9 the time delay is set in A27)

10) Appliance cleaning. The function is started with a pulse signal. See also description on page 5.

11) Forced refrigeration at hotgas defrost when the input is short-circuited.

12) Night cover

13,14) Not used

15) Case shut down when the input is closed.

If the controller is built into a network with data communication, it must have an address, and the master gateway of the data communication must then know this address.

t46 t47 o01

Miscellaneous

DelayOfOutp.

o02 DI 1 Config.

Definition takes place with the numerical value shown to the left.

(0 = off)

DI state

(Measurement)

The DI input’s present status is shown here. ON or OFF.

The address is set between 0 and 240, depending on the system unit and the selected data communication. If the system unit is gateway type AKA 245, the version must be

6.20 or higher.

The address is sent to the gateway when the menu is set in pos. ON

IMPORTANT: Before you set o04, you MUST set o61. Otherwise you will be transmitting incorrect data.

(The function is not used when the data communication is MODBUS)

Access code 1 (Access to all settings)

If the settings in the controller are to be protected with an access code you can set a numerical value between 0 and 100. If not, you can cancel the function with setting 0.

(99 will always give you access).

Sensor type for S3, S4, S5

Normally a Pt 1000 sensor with great signal accuracy is used. But you can also use a

PTC 1000 sensor with another signal accuracy.

All the mounted sensors S3-S5 must be of the same type.

Local readout of software version

Max. standby time after coordinated defrost

When a controller has completed a defrost it will wait for a signal which tells that the refrigeration may be resumed. If this signal fails to appear for one reason or another, the controller will itself start the refrigeration when this standby time has elapsed.

Select signal for the display S4%

Here you define the signal to be shown by the display.

S3, S4, or a combination of the two.

With setting 0% only S3 is used. With 100% only S4.

Pe. Working range for pressure transmitter - min. value

Pe. Working range for pressure transmitter - max. value o03 o04 o05 Acc. code o06 SensorConfig

Pt = 0

PTC = 1 o08 SW version o16 Max HoldTime o17 Disp. S4% o20 MinTransPres o21 MaxTransPres

20 Manual RS8FS502 © Danfoss 2016-09

Refrigerant setting (only if "r12" = 0)

Before refrigeration is started, the refrigerant must be defined. You may choose between the following refrigerants

1=R12. 2=R22. 3=R134a. 4=R502. 5=R717. 6=R13. 7=R13b1. 8=R23. 9=R500.

10=R503. 11=R114. 12=R142b. 13=Userdefined. 14=R32. 15=R227. 16=R401A.

17=R507. 18=R402A. 19=R404A. 20=R407C. 21=R407A. 22=R407B. 23=R410A.

24=R170. 25=R290. 26=R600. 27=R600a. 28=R744. 29=R1270. 30=R417A.

31=R422A. 32=R413A. 33=R422D. 34=R427A. 35=R438A. 36=XP10. 37=R407F.

38=R1234ze. 39=R1234yf. 40=R448A. 41=R449A. 42=R452A.

Warning: Wrong selection of refrigerant may cause damage to the compressor.

Other refrigerants: Here Setting 13 is selected and then three factors -Ref.Fac a1, a2 and a3 - via AKM must be set.

Digital input signal - D2

The controller has a digital input 2 which can be used for one of the following functions:

Off: The input is not used.

1) Status display of a contact function

2) Door function. When the input is open it signals that the door is open. The refrigeration and the fans are stopped. When the time setting in “A04” is passed, an alarm will be given and refrigeration resumed. (o89).

3) Door alarm. When the input is open it signals that the door is open. When the time setting in “A04” is passed an alarm will be given.

4) Defrost. The function is started with a pulse signal. The controller will register when the DI input is activated. The controller will then start a defrost cycle. If the signal is to be received by several controllers it is important that ALL connections are mounted the same way (DI to DI and GND to GND).

5) Main switch. Regulation is carried out when the input is short-circuited, and regulation is stopped when the input is put in pos. OFF.

6) Night operation. When the input is short-circuited, there will be regulation for night operation.

7) Thermostat band changeover. Switch to thermostat 2 (r21)

8) Separate alarm function. Alarm will be given when the input is short-circuited.

9) Separate alarm function. Alarm will be given when the input is opened.

10) Appliance cleaning. The function is started with a pulse signal. See also description on page 5.

11) Forced refrigeration at hotgas defrost when the input is short-circuited.

12) Night blinds. When the input is short-circuited the night blinds will be activated.

13) The input is used for coordinated defrost in conjunction with other controllers of the same type

14) Not used.

15) Case shut down when input is closed.

Configuration of light function

(If night blind is selected, it will be synchronised with the light function)

1) Light is controlled via day/night status

2) Light is controlled via data communication and "Light remote o39"

3) Light is controlled by door contact, defined in either o02, o37 or o84 where the setting is selected to either 2 or 3. When the door is opened the relay will cut in. When the door is closed again there will be a time delay of two minutes before the light is switched off.

4) As "2" but if there are any 15-minute network errors, the light will switch on and the night blind will open.

Activation of light relay

The light relay can be activated here, but only if defined in o38 with setting 2.

Rail heat during day operation

The ON period is set as a percentage of the time

Rail heat during night operation

The ON period is set as a percentage of the time

Rail heat cycle

The period of time for the aggregate ON time + OFF time is set in minutes

Appliance cleaning

The status of the function can be followed here or the function can be started manually.

0 = Normal operation (no cleaning)

1 = Cleaning with fans operating. All other outputs are Off.

2 = Cleaning with stopped fans. All outputs are Off.

If the function is controlled by a signal at the DI1, DI2 or DI3 input, the relevant status can be seen here in the menu.

Selection of application

The controller can be defined in various ways. Here you set which of the 10 applications is required. On page 12 you can see a survey of applications.

This menu can only be set when regulation is stopped, i.e. “r12” is set to 0.

o30 Refrigerant o37 DI2 config.

o38 Light config o39 Light remote o41 Railh.ON day% o42 Railh.ON ngt% o43 Railh. cycle o46 Case clean o61 Appl. Mode

Manual RS8FS502 © Danfoss 2016-09 21

Transfer a set of pre-settings to the controller

An option exists to select quick settings for a number of parameters. This is based on whether an appliance or a room needs to be controlled or whether the defrosting must be stopped by time or by temperature. The overview can be seen on page 27.

This menu can only be set when the control is stopped, i.e. When "r12" is set at 0.

On setting the value will fall back to 0. A subsequent adjustment/setting of parameters can be carried out as required.

Access code 2 (Access to adjustments)

There is access to adjustments of values, but not to configuration settings. If the settings in the controller are to be protected with an access code you can set a numerical value between 0 and 100. If not, you can cancel the function with setting 0. If the function is used, access code 1 (o05) must also be used.

Save as factory setting

With this setting you save the controller’s actual settings as a new basic setting (the earlier factory settings are overwritten).

o62 o64 o67 -

-

Acc. code 2

Digital input signal - DI3 (high voltage input)

The controller has a digital input 3 which can be used for one of the following functions:

Off: The input is not used.

1) Status display of 230 V signal

2) Door function. When the input is 0 V it signals that the door is open. The refrigeration and the fans are stopped. When the time setting in “A04” is passed, an alarm will be given and refrigeration resumed. (o89)

3) Door alarm. When the input is 0 V it signals that the door is open. When the time setting in “A04” is passed an alarm will be given.

4) Defrost. The function is started with a pulse signal. (puls on 230 V)

5) Main switch. Regulation is carried out when the input is 230 V, and regulation is stopped when the input is 0 V.

6) Night operation. When the input is 230 V, there will be regulation for night operation.

7) Thermostat band changeover. Switch to thermostat 2 (r21)

8) Not used.

9) Not used.

10) Appliance cleaning. The function is started with a pulse signal (pulse on 230 V).

See also description on page 5.

11) Forced refrigeration at hotgas defrost when the input is 230 V.

12) Night cover

13) Not used

14) Cooling stopped with the function "Forced closing"

15) Case shut down when the input is closed. Receiver 230V

Rail heat control

The rail heat can be controlled in several ways:

0: The function is not used

1: Pulse control is used with a timer function following the day/night operation (o41 and o42)

2: Pulse control is used with a dew point function. This function requires that a signal is received about the dew point value. The value is measured by a system manager and sent to the controller via the data communication.

Dew point value where the rail heat is minimum

This function is discussed earlier in the manual.

Dew point value where the rail heat is maximum

This function is discussed earlier in the manual.

Lowest permitted rail heat effect

Here the % part of the effect to be achieved when the dew point value is minimum.

Start of refrigeration when door is open

If the door has been left open, refrigeration must be started after a set time. That time can be set here.

Defrosting and fan operation during forced closing

You can set whether fans should be operational or stopped if the function “Forced closing” is activated here.

0: The fans will be stopped and defrosting will be permitted.

1: The fans will run and defrosting will be permitted.

2: The fans will be stopped and defrosting will not be permitted during a forced closing.

3: The fans will run and defrosting will not be permitted during a forced closing.

Alternative display

A reading can be displayed by pressing the lower button on the controller. This reading is set from the factory so that the defrosting stop temperature is displayed.

A different setting will give the following reading:

1: (Defrost stop temperature = factory setting)

2: S6 temperature

3: S5B temperature (Application 9 only)

4: S3B temperature (Application 10 only) o84 DI3 config.

o85 Railh. mode o86 o87 o88 o89

DewP Min lim

DewP Max lim

Rail Min ON%

DoorInjStart o90 Mode ForcedCl o92 Displ menu 2

22 Manual RS8FS502 © Danfoss 2016-09

Display of temperature during normal operation

1: Air temperature. Weighted S3 + S4

2: Product temperature S6 (not application 9 and 10)

Light and night blinds definition

0: Light is switched off and night blinds are open when the main switch is off

1: Light and night blinds are independent of main switch.

Configuration of alarm relay

The alarm relay will be activated upon an alarm signal from the following groups:

1 - High temperature alarms

2 - Low temperature alarms

4 - Sensor error

8 - Digital input enabled for alarm

16 - Defrosting alarms

32 - Miscellaneous

64 - Injection alarms

The groups that are to activate the alarm relay must be set by using a numerical value which is the sum of the groups that must be activated.

(E.g.: a value of 5 will activate all high temperature alarms and all sensor error and 0 will cancel relay function o97 Disp. Ctrl.

o98 Light MS = Off

P41 Al.Rel. Conf.

u09 u10 u11

Case shut down

Service

S5 temp.

DI1 status

Defrost time

Service

Temperature measured with S5 sensor

Status on DI1 input. on/1=closed

Read the duration of the ongoing defrost or the duration of the last completed defrost.

Temperature measured with S3 sensor

Status at the day-/night operation (night operation: on/off)

Temperature measured with S4 sensor

Thermostat temperature

Read the ongoing cutin time for the thermostat or the duration of the last completed cutin

Read the temperature at the S2 sensor

Read superheat

Read the control’s actual superheat reference

Read the valve’s actual opening degree

Read the evaporating pressure

Read the evaporating temperature

Read the temperature at the S6 sensor

Status on DI2 output. on/1=closed

Air temperature. Weighted S3 + S4

Measured temperature for alarm thermostat

* Status on relay for cooling

* Status on relay for fan

* Status on relay for defrost

* Status on relay for railheat

* Status on relay for alarm

* Status on relay for light

* Status on relay for valve in suction line

* Status on relay for compressor 2

* Temperature measured with S5B sensor

* Temperature measured with S3B sensor

* Status on relay for hot gas

* Status on relay for heating element in drip tray

* Status on relay for night blinds

* Status on relay for defrost B

* Status on relay for heat function

* Readout of the actual rail heat effect in %

Readout of which thermostat used for regulation: 1= Thermostat 1,

2= Thermostat 2

Status on input DI3 (on/1 = 230 V)

Readout of the actual cutin value for the thermostat u12 u13 u16 u17 u18 u87 u90

S3 air temp

Night Cond.

S4 air temp

Ther. air

Ther runtime

DI3 status

Cutin temp.

u80 u81 u82 u83 u36 u37 u56 u57 u58 u59 u60 u61 u62 u63 u64 u67 u75 u20 u21 u22 u23 u25 u26 u76 u84 u85 u86

S2 temp.

Superheat

SH ref.

AKV OD %

Evap.press Pe

Evap.temp Te

S6 temp

DI2 status

Display air

Alarm air

Comp1/LLSV

Fan relay

Def. relay

Railh. relay

Alarm relay

Light relay

SuctionValve

Comp2 relay

S5 temp. B

S3 temp. B

Hotgas valve

Drip tray

Blinds relay

Def. relay B

Heat relay

Rail DutyC %

Ther. band

Manual RS8FS502 © Danfoss 2016-09 23

Readout of the actual cut out value for the thermostat

Status on function "Adaptive defrost"

0: Off. Function is not activated and is zero set

1: Sensor error S3/S4 are reversed.

2: Tuning is in progress

3: Normal

4: Light build-up of ice

5: Medium build-up of ice

6: Heavy build-up of ice u91

U01

Cutout temp.

AD state

Number of defrosts carried out since the initial power up or since the resetting of the function

U10 Acc.defrost

Number of defrosts skipped since the initial power up or since the resetting of the function

U11

*) Not all will be displayed. Only the function belonging to the selection application is displayed.

Acc.def.skip

Operating status

The controller goes through some regulating situations where it is just waiting for the next point of the regulation. To make these “why is nothing happening” situations visible, you can see an operating status on the display. Push briefly (1s) the upper button. If there is a status code, it will be shown on the display. The individual status codes have the following meanings:

Normal regulation

Waiting for end of the coordinated defrost

When the compressor is operating it must run for at least x minutes.

When the compressor is stopped, it must remain stopped for at least x minutes.

The evaporator drips off and waits for the time to run out

Refrigeration stopped by main switch. Either with r12 or a DI-input

Refrigeration stopped by thermostat

Defrost sequence. Defrost in progress

Defrost sequence. Fan delay — water attaches to the evaporator

Refrigeration stopped due to open ON input or stopped regulation

Door is open. DI input is open

Melt function in progress. Refrigeration is interrupted

Modulating thermostat control

Emergency cooling due to sensor error

Regulation problem in the injections function

Start-up phase 2. Evaporator being charged

Adaptive control

Start-up phase 1. Signal reliability from sensors is controlled

Manual control of outputs

No refrigerant selected

Appliance cleaning

Forced cooling

Delay on outputs during start-up

Heat function r36 is active

Case shut down

Other displays:

The defrost temperature cannot be displayed. There is stop based on time

Defrost in progress / First cooling after the defrost where the temperature is still above the thermostat band.

Password required. Set password

Regulation is stopped via main switch

S15

S16

S17

S18

S19

S20

S21

S22

S0

S1

S2

S3

S4

S10

S11

S14

S30

S32

S33

S45

S23

S24

S25

S26

S29 non

-d-

PS

OFF

20

21

22

15

16

17

18

19

10

11

14

2

3

0

1

4

30

32

33

45

23

24

25

26

29

(Measurement)

Ctrl. state:

(Shown in all menu displays)

*) Emergency cooling will take effect when there is lack of signal from a defined S3 or S4 sensor or signal from the pressure transmitter is outside signal range.. The regulation will continue with a registered average cutin frequency. There are two registered values – one for day operation and one for night operation.

24 Manual RS8FS502 © Danfoss 2016-09

Fault message

In an error situation the LED’s on the front will flash and the alarm relay will be activated. If you push the top button in this situation you can see the alarm report in the display.

There are two kinds of error reports - it can either be an alarm occurring during the daily operation, or there may be a defect in the installation.

A-alarms will not become visible until the set time delay has expired.

E-alarms, on the other hand, will become visible the moment the error occurs.

(An A alarm will not be visible as long as there is an active E alarm).

Here are the messages that may appear:

Code / Alarm text via data communication

Description Alarm relay groups (P41)

A1/--- High t.alarm

A2/--- Low t. alarm

High temperature alarm

Low temperature alarm

1

2

A4/--- Door alarm

A5/--- Max hold time

Door alarm

The ”o16” function is activated during a coordinated defrost

8

16

A10/--- Inject prob.

A11/--- No Rfg. sel.

Control problem

No refrigerant selected

64

64

A13/--- High temp S6

A14/--- Low temp S6

A15/--- DI1 alarm

A16/--- DI2 alarm

Temperature alarm. High S6

Temperature alarm. Low S6

DI1 alarm

DI2 alarm

1

2

8

8

A45/--- Standby mode

A59/--- Case clean

--- AD fault

--- AD Iced

--- AD not defr.

--- AD flashgas

E1/--- Ctrl. error

E6/--- RTC error

Standby position (stopped refrigeration via r12 or DI input)

Appliance cleaning. Signal from DI input

Error in the adaptive defrost function

Evaporator is iced up. Reduction of air flow

Defrost of evaporator is not satisfactory

Flash gas is formed at the valve

Faults in the controller

Check clock

-

-

16

16

16

16

32

32

E20/--- Pe error

E24/--- S2 error

E25/--- S3 error

E26/--- S4 error

E27/--- S5 error

E28/--- S6 error

E34/--- S3 error B

E37/--- S5 error B

Error on pressure transmitter Pe

Error on S2 sensor

Error on S3 sensor

Error on S4 sensor

Error on S5 sensor

Error on S6 sensor

Error on S3B sensor (appl. 10 only)

Error on S5B sensor

---/--- Max Def.Time

Defrost stopped based on time instead of, as wanted, on temperature

Data communication

The importance of individual alarms can be defined with a setting. The setting must be carried out in the group "Alarm destinations"

Settings from

System manager

High

Middle

Low

Log only

Disabled

Settings from

2

3

AKM (AKM destination)

1

Log

X

X

X

X

Non

Alarm relay

High

X

Low-High

X

X

X

Send via

Network

X

X

X

16

4

4

64

4

4

4

4

4

Manual RS8FS502 © Danfoss 2016-09 25

Operation

Display

The values will be shown with three digits, and with a setting you can determine whether the temperature is to be shown in °C or in

°F.

Light-emitting diodes (LED) on front panel

The LED’s on the front panel will light up when the relevant relay is activated.

= Refrigeration

= Defrost

= Fan running

The light-emitting diodes will flash when there is an alarm.

In this situation you can download the error code to the display and cancel/sign for the alarm by giving the top button a brief push.

The buttons

When you want to change a setting, the upper and the lower buttons will give you a higher or lower value depending on the button you are pushing. But before you change the value, you must have access to the menu. You obtain this by pushing the upper button for a couple of seconds - you will then enter the column with parameter codes. Find the parameter code you want to change and push the middle buttons until value for the parameter is shown. When you have changed the value, save the new value by once more pushing the middle button.

Examples

Set menu

1. Push the upper button until a parameter r01 is shown

2. Push the upper or the lower button and find that parameter you want to change

3. Push the middle button until the parameter value is shown

4. Push the upper or the lower button and select the new value

5. Push the middle button again to freeze the value.

Cutout alarm relay / receipt alarm/see alarm code

• A short press of the upper button

If there are several alarm codes they are found in a rolling stack.

Push the uppermost or lowermost button to scan the rolling stack.

Set temperature

1. Push the middle button until the temperature value is shown

2. Push the upper or the lower button and select the new value

3. Push the middle button again to conclude the setting.

Reading the temperature at defrost sensor (Or product sensor, if selected in o92.)

• A short press of the lower button

Manuel start or stop of a defrost

• Push the lower button for four seconds.

(not application 6)

Get a good start

With the following procedure you can start regulation very quickly:

1 Open parameter r12 and stop the regulation (in a new and not previously set unit, r12 will already be set to 0 which means stopped regulation.)

2 Select electrical connection based on the drawings on page 12 and 13

3 Open parameter o61 and set the electric connection number in it

4 Now select one of the preset settings from the table on page 27.

5 Open parameter o62 and set the number for the array of presettings. The few selected settings will now be transferred to the menu.

6 Select refrigerant via parameter o30

7 Open parameter r12 and start the regulation

8 Go through the survey of factory settings. The values in the grey cells are changed according to your choice of settings. Make any necessary changes in the respective parameters.

9 For network. Set the address in o03

10 Send address to system unit:

• MODBUS: Activate scan function in system unit

• If another data communication card is used in the controller:

- LON RS485: Activate the function o04

- DANBUSS: Activate the function o04

26 Manual RS8FS502 © Danfoss 2016-09

Auxiliary schedule for settings (quick-setup)

Preset settings (o62)

Temperature (SP)

Max. temp. setting (r02)

Min. temp. setting (r03)

Sensor signal for thermostat. S4% (r15)

Alarm limit high (A13)

Alarm limit low (A14)

Sensor signal for alarm funct.S4% (A36)

Interval between defrost (d03)

Defrost sensor: 0=time, 1=S5, 2=S4 (d10)

DI1 config. (o02)

Sensor signal for display view S4% (017)

Case

Defrost stop on time

1

2°C

6°C

0°C

8°C

-5°C

6 h

0

2

Defrost stop on S5

-2°C

4°C

-4°C

100%

6°C

-5°C

0%

6h

1

Appliance cleaning (=10)

3

-28°C

-22°C

-30°C

-15°C

-30°C

100%

12h

1

Room

0%

Defrost stop on time

4

4°C

8°C

0°C

10°C

0°C

8h

0

5

Defrost stop on S5

0°C

5°C

-2°C

0%

8°C

0°C

0%

8h

1

Door function (=2)

6

-22°C

-20°C

-24°C

-15°C

-30°C

6h

1

Note: For applications 9 and 10 the sensor weighting for the S3/S4 sensors is not used for the thermostat, alarm thermostat and display readings as the sensor uses are predefined.

Manual RS8FS502 © Danfoss 2016-09 27

Menu survey

Parameter

Function

Normal operation

Temperature (setpoint)

Thermostat

Differential

Max. limitation of setpoint setting

Min. limitation of setpoint setting

Adjustment of temperature indication

Temperature unit (°C/°F)

Correction of the signal from S4

Correction of the signal from S3

Manual service, stop regulation, start regulation (-1, 0, 1)

Displacement of reference during night operation

Define thermostat function

1=ON/OFF, 2=Modulating

Definition and weighting, if applicable, of thermostat sensors - S4% (100%=S4, 0%=S3)

Time between melt periods

Duration of melt periods

Temperature setting for thermostat band 2

. As differential use r01

Correction of the signal from

S6

Definition and weighting, if applicable, of thermostat sensors

when night cover is on. (100%=S4, 0%=S3)

Heat function

Neutral zone between refrigeration and heat function

Time delay at switch between refrigeration and heat function

Alarms

Delay for temperature alarm

Delay for door alarm

Delay for temperature alarm after defrost

High alarm limit for thermostat 1

Low alarm limit for thermostat 1

High alarm limit for thermostat 2

Low alarm limit for thermostat 2

High alarm limit for sensor S6 at thermostat 1

Low alarm limit for sensor S6 at thermostat 1

High alarm limit for sensor S6 at thermostat 2

Low alarm limit for sensor S6 at thermostat 2

S6 alarm time delay

With setting = 240 the S6 alarm will be omitted

Alarm time delay or signal on the DI1 input

Alarm time delay or signal on the DI2 input

Signal for alarm thermostat. S4% (100%=S4, 0%=S3)

Delay for S6 (product sensor alarm) after defrost

Compressor

Min. ON-time

Min. OFF-time

Time delay for cutin of comp.2

Defrost

Defrost method

: 0=off, 1= EL, 2= gAs

Defrost stop temperature

Interval between defrost starts

Max. defrost duration

Displacement of time on cutin of defrost at start-up

Drip off time

Delay for fan start after defrost

Fan start temperature

Fan cutin during defrost

0: Stopped

1: Running

2: Running during pump down and defrost

EL-diagram page 12 or 13

Code 1 2 3 4 5 6 7 8 9 10

Min.-value Max.-value

Factory setting

SW = 1.9x

Actual setting

- - r59 r61 r62 r15 r16 r17 r21 r05 r09 r10 r12 r13 r14 r01 r02 r03 r04 r63

1 1 1 1 1 1 1 1 1 1 -50°C

1 1 1 1 1 1 1 1 1 1 0.1 K

1 1 1 1 1 1 1 1 1 1 -49°C

1 1 1 1 1 1 1 1 1 1 -50°C

1 1 1 1 1 1 1 1 1 1 -10

1 1 1 1 1 1 1 1 1 1 0/°C

1 1 1 1 1 1 1 1 1 1 -10 K

1 1 1 1 1 1 1 1 1 1 -10 K

1 1 1 1 1 1 1 1 1 1 -1

1 1 1 1 1 1 1 1 1 1 -50 K

1 1 1 1 1 1 1 1 1 1 1

1 1 1 1 1 1 1 1 0 %

1 1 1 1 1 1 1 1 1 1 0 hrs

1 1 1 1 1 1 1 1 1 1 0 min.

1 1 1 1 1 1 1 1 1 1 -50°C

1 1 1 1 1 1 1 1

1 1 1 1 1 1 1 1

1

-10 K

0 %

0 K

1 0 min.

50°C

20 K

50°C

49°C

10

1/F

10 K

10 K

1

50 K

2

100 %

10 hrs

30 min.

50°C

10 K

100 %

50 K

2

240 min.

0

0

100

2

100

1

5

2

2

50

-50

0

0

1

0

0

0/°C

0 c01 c02 c05 d01 d02 d03 d04 d05 d06 d07 d08 d09

A27

A28

A36

A52

A03 1 1 1 1 1 1 1 1 1 1 0 min.

A20

A21

A22

A23

A04

A12

1 1 1 1 1 1 1 1 1 1 0 min.

1 1 1 1 1 1 1 1 1 1 0 min.

A13 1 1 1 1 1 1 1 1 1 1 -50°C

A14 1 1 1 1 1 1 1 1 1 1 -50°C

1 1 1 1 1 1 1 1 1 1 -50°C

1 1 1 1 1 1 1 1 1 1 -50°C

1 1 1 1 1 1 1 1

1 1 1 1 1 1 1 1

-50°C

-50°C

A24

A25

A26

1 1 1 1 1 1 1 1

1 1 1 1 1 1 1 1

1 1 1 1 1 1 1 1

-50°C

-50°C

0 min.

1 1 1 1 1 1 1 1 1 1 0 min.

1 1 1 1 1 1 1 1 1 1 0 min.

1 1 1 1 1 1 1 1

1 1 1 1 1 1 1 1

0 %

0 min.

1

1

1

1

1

1

1

1

1

0 min.

0 min.

0 sec

30 min.

30 min.

999 sec

0

0

5

1 1 1 1 1 1 1 1 1 1 0/off

1 1 1 1 1 1 1 1 1 1 0°C

2/gAs

50°C

1 1 1 1 1 1 1 1 1 1 0 hrs/Off 240 hrs

1 1 1 1 1 1 1 1 1 1 0 min.

1 1 1 1 1 1 1 1 1 1 0 min.

360 min.

45

240 min.

0

1/EL

6

8

1 1 1 1 1 1 1 1 1 1 0 min.

1 1 1 1 1 1 1 1 1 1 0 min.

1 1 1 1 1 1 1 1 1 1 -50 °C

1 1 1 1 1 1 1 1 1 1 0

60 min.

60 min.

0 °C

2

0

0

-5

1

240 min.

30

240 min.

60

240 min.

90

50°C

50°C

8

-30

50°C

50°C

50°C

50°C

8

-30

8

-30

50°C

50°C

8

-30

240 min.

240

240 min.

30

240 min.

30

100 % 100

240 min.

90

28 Manual RS8FS502 © Danfoss 2016-09

Continued

Defrost sensor:

0 =Stop on time, 1=S5, 2=S4, 3=Sx

(Application 1-8 and 10: both S5 and S6.

Application 9: S5 and S5B)

Pump down delay

Drain delay (used at hot gas defrost only)

Max. aggregate refrigeration time between two defrosts

Heat in drip tray. Time from defrosting stops to heating in the drip tray is switched off

Adaptive defrost:

0=not active, 1=monitoring only, 2=skip allowed day,

3=skip allowed both day and night, 4=own assessment

+ all schedules

Time delay before opening of hot gas valve

Rail heat during defrost

0=off. 1=on. 2=Pulsating

Max. duration of -d- in display

Injection control function

Max. value of superheat reference

Min. value of superheat reference

MOP temperature. Off if MOP temp. = 15.0 °C

Period time of AKV pulsation

Only for trained personnel

Fan

Fan stop temperature (S5)

Pulse operation on fans: 0=No pulse operation, 1=At thermostat cuts out only, 2= Only at thermostat cut outs during night operation

Period time for fan pulsation (on-time + off-time)

On-time in % of period time

Real time clock

Six start times for defrost.

Setting of hours.

0=OFF

Six start times for defrost.

Setting of minutes.

0=OFF

Clock - Setting of hours

Clock - Setting of minute

Clock - Setting of date

Clock - Setting of month

Clock - Setting of year

Miscellaneous

Delay of output signals after start-up

Input signal on DI1. Function:

0=not used. 1=status on DI1. 2=door function with alarm when open. 3=door alarm when open. 4=defrost start

(pulse-signal). 5=ext.main switch. 6=night operation

7=thermostat band changeover (activate r21). 8=alarm function when closed. 9=alarm function when open.

10=Appliance cleaning (pulse signal). 11=forced cooling at hot gas defrost,

12=night cover. 15=case shut down

Network address

On/Off switch (Service Pin message)

IMPORTANT! o61 must be set prior to o04

(used at LON 485 and DANBUSS only)

Access code 1 (all settings)

Used sensor type

: 0=Pt1000, 1=Ptc1000,

Readout of software version

Max hold time after coordinated defrost

Select signal for display view. S4% (100%=S4, 0%=S3)

Pressure transmitter working range – min. value

Pressure transmitter working range – max. value

Refrigerant setting:

1=R12. 2=R22. 3=R134a. 4=R502. 5=R717. 6=R13.

7=R13b1. 8=R23. 9=R500. 10=R503. 11=R114.

12=R142b. 13= User defined.

14=R32. 15=R227.

16=R401A. 17=R507. 18=R402A. 19=R404A. 20=R407C.

21=R407A. 22=R407B. 23=R410A. 24=R170. 25=R290.

26=R600. 27=R600a. 28=R744. 29=R1270. 30=R417A.

31=R422A.

32=R413A. 33=R422D. 34=R427A. 35=R438A.

36=R513A. 37=R407F. 38=R1234ze. 39=R1234yf.

40=R448A. 41=R449A. 42=R452A

Code 1 2 3 4 5 6 7 8 9 10 Min.

d10 1 1 1 1 1 1 1 1 1 1 0 3

Max.

0

Fac.

Actual

d16 d17 d18 d20 d21

1 1 1 1 1 1 1 1 1 1 0 min.

1 0 min.

1 1 1 1 1 1 1 1 1 1 0 hrs

1 0 min.

1 1 1 1 1 1 1 1 1 1 0

60 min.

60 min.

0

0

48 hrs 0/OFF

240 min.

30

4 0 d23 d27 d40

1 1 1 1

1

1 1 1

0 min

0

1 1 1 1 1 1 1 1 1 1 5 min.

n09 n10 n11 n13

1 1 1 1 1 1 1 1 1 1 2°C

1 1 1 1 1 1 1 1 1 1 2°C

1 1 1 1 1 1 1 1 1 1 -50°C

1 1 1 1 1 1 1 1 1 1 3 sec

60 min

2

240 min.

0

2

30 min.

20°C

20°C

15°C

6 sec

12

3

15

6

F04

F05

1 1 1 1 1 1 1 1 1 1 -50°C

1 1 1 1 1 1 1 1 1 1 0

50°C

2

50

0

F06

F07

1 1 1 1 1 1 1 1 1 1 1 min.

1 1 1 1 1 1 1 1 1 1 0 % t07 t08 t45 t46 t47 t01 - t06 t11 - t16

1 1 1 1 1 1 1 1 1 1 0 hrs

1 1 1 1 1 1 1 1 1 1 0 min.

1 1 1 1 1 1 1 1 1 1 0 hrs

1 1 1 1 1 1 1 1 1 1 0 min.

1 1 1 1 1 1 1 1 1 1 1 day

1 1 1 1 1 1 1 1 1 1 1 mon.

1 1 1 1 1 1 1 1 1 1 0 year o01 o02

1 1 1 1 1 1 1 1 1 1 0 sec

1 1 1 1 1 1 1 1 1 1 0

30 min.

100 %

23 hrs

59 min.

5

100

0

0

23 hrs

59 min.

31 day 1

12 mon.

1

99 year 0

0

0

600 sec

15

5

0 o03 o04

1 1 1 1 1 1 1 1 1 1 0

1 1 1 1 1 1 1 1 1 1 0/Off

240

1/On

0

0/Off o05 o06 o08 o16 o17 o20 o21 o30

1 1 1 1 1 1 1 1 1 1 0

1 1 1 1 1 1 1 1 1 1 0/Pt

1 1 1 1 1 1 1 1 1 1

1 1 1 1 1 1 1 1 1 1 0 min.

1 1 1 1 1 1 1 1 0 %

1 1 1 1 1 1 1 1 1 1 -1 bar

1 1 1 1 1 1 1 1 1 1 6 bar

1 1 1 1 1 1 1 1 1 1 0

100

1/Ptc

0

0/Pt

360 min.

20

100 % 100

5 bar

200 bar

42

-1

12

0

Manual RS8FS502 © Danfoss 2016-09 29 d01

3:Brine

(in EVR version only)

Continued

Input signal on DI2. Function:

(0=not used. 1=status on DI2. 2=door function with alarm when open. 3=door alarm when open. 4=defrost start

(pulse-signal). 5=ext. main switch 6=night operation

7=thermostat band changeover (activate r21). 8=alarm function when closed. 9=alarm function when open.

10=Appliance cleaning (pulse signal). 11=forced cooling at hot gas defrost.). 12=night cover, 13=coordinated defrost).

15=case shut down

Configuration of light function

: 1=Light follows day /night operation, 2=Light control via data communication via ‘o39’, 3=Light control with a DI-input, 4=As "2", but light switch on and night cover will open if the network cut out for more than 15 minutes.

Activation of light relay (only if o38=2)

On=light

Rail heat On time during day operations

Rail heat On time during night operations

Code 1 2 3

o37 o38 1 1

4

1

5 6 7 8 9 10

1 1 1 1 1 1 1 1 1 1 0

1 1 1 1 1 1

Min.

o39 o41 o42

1 1 1

1 1 1 1

1 1 1 1

1 1 1 1 1 0/Off

1

1

1

1

1

1

0 %

0 %

Rail heat period time (On time + Off time)

Appliance cleaning. 0=no Appliance cleaning. 1=Fans only.

2=All output Off.

Selection of EL diagram. See overview page 12 and 13

Download a set of predetermined settings. See overview page 27.

Access code 2 (partial access)

Replace the controllers factory settings with the present settings

Input signal on DI3. Function: (high voltage input)

(0=not used. 1=status on DI2. 2=door function with alarm when open. 3=door alarm when open. 4=defrost start

(pulse-signal). 5=ext. main switch 6=night operation,

7= thermostat band changeover (activate r21)

. 8=Not used. 9=Not used. 10=Appliance cleaning (pulse signal).

11=forced cooling at hot gas defrost,

12=night cover.

13=Not used. 14=Refrigeration stopped (forced closing)). 15=case shut down

Rail heat control

0=not used, 1=pulse control with timer function (o41 and o42), 2=pulse control with dew point function

Dew point value where the rail heat is minimum

Dew point value where the rail heat is 100% on

Lowest permitted rail heat effect in %

Time delay from "open door” refrigeration is started

Fan operation at stopped cooling (forced closing):

0= Stopped (defrost allowed)

1= Running (defrost allowed)

2= Stopped (defrost not allowed)

3= Running (defrost not allowed)

1=defrost stop temperature, 2=S6 temperature,

3=S5_B temperature (application 9), 4=S3B (application

10)

Display of temperature

1= u56 Air temperature

2= u36 product temperature

Light and night blinds defined

0: Light is switch off and night blind is open when the main switch is off

1: Light and night blind is independent of main switch

Configuration of alarm relay

The alarm relay will be activated upon an alarm signal from the following groups:

1 - High temperature alarms

2 - Low temperature alarms

4 - Sensor error

8 - Digital input enabled for alarm

16 - Defrosting alarms

32 - Miscellaneous

64 - Injection alarms

The groups that are to activate the alarm relay must be set by using a numerical value which is the sum of the groups that must be activated.

(E.g.: a value of 5 will activate all high temperature alarms and all sensor error and 0 will cancel the relay function).

*

* o43

*** o46 o61 o62 1 1 1 1 1 1 1 1 1 1 0

*** o64 o67 o84 o85 o86 o87 o88 o89 o90 o92 o97 o98

P41

1

1 1 1 1 1 1 1 1 1 1 1

1

1

1

1 1 1 1

1 1 1 1

1 1 1 1

1

1

1

1 1 -10°C

1 1 -9°C

1 1 0 %

1 1 1 1 1 1 1 1 1 1 0 min.

1 1 1 1 1 1 1 1 1 1 0

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

6 min.

0

0

0/Off

0

0

1

1

0

0

15

Max.

4

1/On

100 %

100 %

60 min.

2

10

6

100

1/On

15

0/Off

100

100

10

0

1

0

0

0/Off

0

2

50°C 8

50°C

100 %

17

30

240 min.

30

3 1

4

2

1

127

0

1

0

1

1

0

Fac.

111

Actual

30 Manual RS8FS502 © Danfoss 2016-09

Continued

Service

Temperature measured with S5 sensor

Status on DI1 input. on/1=closed

Actual defrost time (minutes)

Temperature measured with S3 sensor

Status on night operation (on or off) 1=on

Temperature measured with S4 sensor

Thermostat temperature

Run time of thermostat (cooling time) in minutes

Temperature of evaporator outlet temp.

Superheat across evaporator

Reference of superheat control

Opening degree of AKV valve

Evaporating pressure Po (relative)

Evaporator temperature To (Calculated)

Temperature measured with S6 sensor

(product temperature)

Status on DI2 output. on/1=closed

Air temperature . Weighted S3 and S4

Measured temperature for alarm thermostat

Status on relay for cooling

Status on relay for fan

Status on relay for defrost

Status on relay for railheat

Status on relay for alarm

Status on relay for light

Status on relay for valve in suction line

Status on relay for compressor 2

Temperature measured with S5B sensor

Temperature measured with S3B sensor

Status on relay for hot

gas- / drain valve

Status on relay for heating element in drip tray

Status on relay for night blinds

Status on relay for defrost

B

Status on relay for heat function

Readout of the actual rail heat effect

1: Thermostat 1 operating, 2: Thermostat 2 operating

Status on high voltage input DI3

Readout of thermostats actual cut in value

Readout of thermostats actual cut out value

Readout of status on the adaptive defrost

0: Off. Function is not activated and are zero set

1: Sensor error or S3/S4 are reversed.

2: Tuning is in progress

3: Normal

4: Light build-up of ice

5: Medium build-up of ice

6: Heavy build-up of ice

Number of defrosts carried out since the initial power up or since the resetting of the function

Number of defrosts skipped since the initial power up or since the resetting of the function

Code 1 2 3 4 5 6 7 8 9 10

u17 u18 u20 u21 u22

** u23 u25 u26 u36 u09 u10 u11 u12

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1 u13 1 1 1 1 1 1 1 1 1 1 u16 1 1 1 1 1 1 1 1 1 1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1 1 1

1 1 1 1 1 1 1 1 1 1

1 1 1 1 1 1 1 1 1 1

1 1 1 1 1 1 1 1 1 1

1 1 1 1 1 1 1 1 1 1

1 1 1 1 1 1 1 1 1 1

1 1 1 1 1 1 1 1 1 1

1 1 1 1 1 1 1 1 u37 u56 u57

** u58

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

** u59 1 1 1 1 1 1 1 1 1 1

**

**

**

**

** u60 u61 u62 u63 u64

** u67

1 1 1 1 1

1 1 1 1

1

1 1

1 1

1

1

1

1 1 1 1

1 1 1

1 1

1 1 1 1 1 u75 u76

1

1

** u80

** u81

** u82

** u83

1

1

1

1

** u84 u85 u86 u87 u90 u91

1

1 1 1 1

1 1 1 1 1

1

1

1

1

1 1

1 1

1 1 1 1 1 1 1 1 1 1

1 1 1 1 1 1 1 1 1 1

1 1 1 1 1 1 1 1 1 1

U01 1 1 1 1 1 1 1 1 1 1

U10 1 1 1 1 1 1 1 1 1 1

U11 1 1 1 1 1 1 1 1 1 1

Min.

*) Can only be set when regulation is stopped (r12=0)

**) Can be controlled manually, but only when r12=-1

***) With access code 2 the access to these menus will be limited

Factory setting

If you need to return to the factory-set values, it can be done in this way:

- Cut out the supply voltage to the controller

- Keep upper and lower button depressed at the same time as you reconnect the supply voltage

Max.

Fac.

Actual

Manual RS8FS502 © Danfoss 2016-09 31

Connections

Overview of outputs and applications.

See also electrical diagrams earlier in the manual

Application

1

2

3

4

8

9

10

5

6

7

DO1 DO2 DO3 DO4 DO5 DO6 DI1 DI2 DI3 AI1 AI2 AI3 AI4 AI5 AI6

• • •

P0 S2 S3 S4 S5 S6

• • •

P0 S2 S3 S4 S5 S6

• • •

P0 S2 S3 S4 S5 S6 suction

Blinds hotgas

• • •

P0 S2 S3 S4 S5 S6

• • •

P0 S2 S3 S4 S5 S6

• • •

P0 S2 S3 S4 S5 S6

• • •

P0 S2 S3 S4 S5 S6 heat

2 1

• • •

P0 S2 S3 S4 S5 S6

• • •

P0 S2 S3 S4 S5 S5B

• • •

P0 S2 S3 S4 S5 S3B

DI1

Digital input signal.

The defined function is active when the input is short-circuited/ opened. The function is defined in o02.

DI2

Digital input signal.

The defined function is active when the input is short-circuited/ opened. The function is defined in o37.

Pressure transmitter

AKS 32R

Connect to terminal 30, 31 and 32.

(Used cable 060G1034: Black=30, Blue=31, Brown=32)

The signal from one pressure transmitter can be received by up to 10 controllers. But only if there are no significant pressure decreases between the evaporators to be controlled. See drawing on page 34.

S2, S6

Pt 1000 ohm sensor

S6 / S5B / S3B, product sensor or defrost sensor B or air sensor B.

The application determines which.

S3, S4, S5

Pt 1000 ohm sensor or PTC 1000 ohm sensor. All have to be of the same type.

S3, air sensor, placed in the warm air before the evaporator

S4, air sensor, placed in the cold air after the evaporator

(the need for either S3 or S4 can be deselected in the configuration)

S5, defrost sensor, placed on the evaporator

EKA Display

If there is be external reading/operation of the controller, display type EKA 163B or EKA 164B can be connected.

RS485 (terminal 51, 52, 53)

For data communication, but only if a data communication module is inserted in the controller. The module can be a LON

RS485, DANBUSS or a MODBUS.

Terminal 51 = screen

Terminal 52 = A (A+)

Terminal 53 = B (B-)

(For LON RS485 and gateway type AKA 245 the gateway must be version 6.20 or higher.)

RJ45

For data communication, but only if a TCP/IP module is inserted in the controller. (OEM specific)

MODBUS

For data communication.

Terminal 56 = screen

Terminal 57 = A+

Terminal 58 = B-

(Alternatively the terminals can be connected to an external display type EKA 163A or 164A, but then they cannot be used for data communication. Any data communication must then be carried out by one of the other methods.)

Supply voltage

230 V a.c.

32 Manual RS8FS502 © Danfoss 2016-09

DO1

Connection of expansion valve type AKV or AKVA. The coil must be a 230 V a.c. coil.

DO2

Alarm

There is a connection between terminal 7 and 8 in alarm situations and when the controller is without power.

Rail heat and heating element in drip tray

There is connection between terminal 7 and 9 when heating takes place.

Night blind

There is connection between terminal 7 and 9 when the night blind is up.

Suction line valve

There is connection between terminal 7 and 9 when the suction line must be open.

DO3

Refrigeration, Rail heat, Heat function, Defrost 2

There is connection between terminal 10 and 11 when the function must be active.

Heating element in drip tray

There is connection between terminal 10 and 11 when heating takes place.

DO4

Defrost

There is connection between terminal 12 and 14 when defrosting takes place.

Hot gas / drain valve

There is connection between terminal 13 and 14 during normal operation.

There is connection between terminal 12 and 14 when the hot gas valves must open.

DO5

Fan

There is connection between terminal 15 and 16 when the fan is on.

Coordinated defrost via cable connections

DO6

Light relay

There is connection between terminal 17 and 18 when the light must be on.

Rail heat, Compressor 2

There is connection between terminal 17 and 19 when the function must be active.

DI3

Digital input signal.

The signal must have a voltage of 0 / 230 V AC.

The function is defined in o84.

Data communication

If data communication is used, it is important that the installation of the data communication cable is performed correctly.

See separate literature No. RC8AC…

Electric noise

Cables for sensors, DI inputs and data communication must be kept separate from other electric cables:

- Use separate cable trays

- Keep a distance between cables of at least 10 cm

- Long cables at the DI input should be avoided

Installation considerations

Accidental damage, poor installation, or site conditions, can give rise to malfunctions of the control system, and ultimately lead to a plant breakdown.

Every possible safeguard is incorporated into our products to prevent this. However, a wrong installation, for example, could still present problems. Electronic controls are no substitute for normal, good engineering practice.

Danfoss will not be responsible for any goods, or plant components, damaged as a result of the above defects. It is the installer's responsibility to check the installation thoroughly, and to fit the necessary safety devices.

Special reference is made to the necessity of signals to the controller when the compressor is stopped and to the need of liquid receivers before the compressors.

Your local Danfoss agent will be pleased to assist with further advice, etc.

Max. 10

The following controllers can be connected up in this way:

EKC 204A, AK-CC 210, AK-CC 250,

AK-CC 450, AK-CC 550A,

Refrigeration is resumed when all controllers have “released” the signal for defrost.

Coordinated defrost via data communication

The setting of controllers to coordinate their defrosting takes place in the gateway/system manager.

Refrigeration is resumed when all controllers have “released” the signal for defrost.

Manual RS8FS502 © Danfoss 2016-09 33

Data

Supply voltage 230 V a.c. +10/-15 %. 5 VA, 50/60 Hz

Sensor S2, S6 Pt 1000

Sensor S3, S4, S5

Accuracy

Pt 1000 or

PTC 1000 ohm

(All 3 must be of the same type)

Measuring range -60 to +120°C

Controller

Pt 1000 sensor

±1 K below -35°C

±0.5 K between -35 to +25°C

±1 K above +25°C

±0.3 K at 0°C

±0.005 K per grad

Measuring of Pe

Digital inputs

DI1, DI2

Pressure transmitter

AKS 32R

Display LED, 3-digits

External display EKA 163B or 164B. (any EKA 163A or 164A)

Signal from contact functions

Requirements to contacts: Gold plating

Cable length must be max. 15 m

Use auxiliary relays when the cable is longer

Digital input DI3 230 V a.c.

Electrical connection cable

Max.1.5 mm 2 multi-core cable

Solid state output

DO1

(for AKV coil)

Max. 240 V a.c. , Min. 28 V a.c.

Max. 0.5 A

Leak < 1 mA

Max. 1 pcs. AKV (2 pcs. if EEC coils are used)

CE

(250 V a.c.)

Relays* DO3, DO4 4 (3) A

DO2, DO5, DO6 4 (3) A

Environments

Density

Mounting

Weight

0 to +55°C, During operations

-40 to +70°C, During transport

20 - 80% Rh, not condensed

No shock influence / vibrations

IP 20

DIN-rail or wall

0.4 Kg

Fixed MODBUS

LON RS485

Data communication

Extension options

TCP/IP

MODBUS

DANBUSS

The controller cannot be hooked up with a monitoring unit type m2.

Power reserve for the clock

4 hours

Approvals

EU Low Voltage Directive and EMC demands re CEmarking complied with

LVD tested acc. EN 60730-1 and EN 60730-2-9, A1, A2

EMC tested acc. EN 61000-6-2 and EN 61000-6-3

* DO3 and DO4 are 16 A relays. DO2, DO5 and DO6 are 8 A relays. Max. load must be observed.

AKV info !!

AKS 32R info

Capacitive load

The relays cannot be used for the direct connection of capacitive loads such as LEDs and on/off control of EC motors.

All loads with a switch mode power supply must be connected with a suitable contactor or similar.

230 V a.c. coil

The signal from one pressure transmitter can be received by up to ten controllers.

There cannot be a significant drop in pressure between the pressure transmitter’s position in the suction line and the S2 temperature in the individual evaporators.

34 Manual RS8FS502 © Danfoss 2016-09

Ordering

Type

AK-CC 550A

EKA 175

EKA 178B

EKA 176

EKA 176A

EKA 163B

EKA 164B

EKA 163A

EKA 164A

Order examples:

Installation

L

Data communication

MODBUS

Function

Case controller with MODBUS data communication

Sensor connections are with screw terminals

Data communication module

LON RS 485

Data communication module MODBUS

Data communication module DANBUSS for Gateway

Data communication module DANBUSS for AK-PI 200

External display with plug for direct connection

External display with operation buttons and plug for direct connections

External display with screw terminals

External display with operation buttons and screw terminals

084B8562

084B8563

Code no.

084B8030

084B8579

084B8571

084B8583

084B8591

084B8574

084B8575

Connection Code no.

084B8030 (AK-CC 550A)

LON

DANBUSS

MODBUS

LON / DANBUSS

L

L < 15 m

MODBUS / LON / DANBUSS

L > 15 m

Manual RS8FS502 © Danfoss 2016-09

084B8030

084B8579

084B8030

084B8583

084B8030

084B8574 (Display)

084B7299 (Cable, 6 m)

084B8030

084B8574 (Display)

084B7299 (Cable, 6 m)

084Bxxxx (Data module)

084B8030

084B8562 (Display)

084Bxxxx (Data moduld)

35

Danfoss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss reserves the right to alter its products without notice. This also applies to products already on order provided that such alternations can be made without subsequential changes being necessary in specifications already agreed.

All trademarks in this material are property of the respecitve companies. Danfoss and Danfoss logotype are trademarks of Danfoss A/S. All rights reserved.

36 Manual RS8FS502 © Danfoss 2016-09

Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertisement

Table of contents