FläktGroup DENCO® C5-12 Controller Owner's manual

Brand: FläktGroup

Model: DENCO® C5-12 Controller

Category: Thermostats

Type: Owner's manual

C5-12

OPERATION MANUAL

C5-12 Controls

2FläktGroup DC-2016-0110-GB 2021-05/R2 • Subject to modifications

1 Overview ...................................................................................... 3

1.1 Introduction ................................................................................................ 3

1.2 Model numbers explained .......................................................................... 3

1.3 Product series overview ............................................................................. 4

1.4 Hardware – Controller ................................................................................ 4

1.5 Controller Inputs and Outputs .................................................................... 5

2 Safety and User Information ...................................................... 8

2.1 Availability of the operation manual ........................................................... 8

2.2 Scope of the operation manual .................................................................. 8

2.3 Document format ....................................................................................... 8

2.4 Safety-conscious working .......................................................................... 9

2.5 Modifications and changes ........................................................................ 9

2.6 Personnel selection and qualification ....................................................... 10

2.7 Closing down procedure .......................................................................... 10

3 Home Page and Status Screens .............................................. 11

3.1 Home Page .............................................................................................. 11

3.2 Unit Status Icons ...................................................................................... 12

3.3 Screen saver ............................................................................................ 12

3.4 Unit Status ............................................................................................... 13

3.5 Active Alarms and Alarm History ............................................................. 13

3.6 Alarms and Interlocks .............................................................................. 14

3.7 Sensor Graph Plots .................................................................................. 18

3.8 Status Information Pages ......................................................................... 19

4 Navigation .................................................................................. 21

4.1 Accessing settings ................................................................................... 21

4.2 Menu Navigation ...................................................................................... 21

4.3 Page Identification ................................................................................... 21

4.4 Additional Information .............................................................................. 21

5 User Settings ............................................................................. 22

5.1 Set-points (Level 1.1) ............................................................................... 22

5.2 Software Version (Level 1.2) .................................................................... 22

5.3 Time Control (Level 1.3) .......................................................................... 23

5.4 Language (Level 1.4) ............................................................................... 23

5.5 Time & Date (Level 1.5) ........................................................................... 23

5.6 Humidifier (CPY) control (Level 1.6) ........................................................ 24

5.7 BMS Communication setup (Level 1.7) ................................................... 24

5.8 pLAN Address (Level 1.8) ........................................................................ 25

5.9 Fan Speed (Level 1.9) ............................................................................. 25

PROTECTION NOTICES

The reproduction, distribution and utilization of this document as well as the communication of its contents to others without

event of the grant of a patent, utility model or design.

C5-12 Controls Overview

FläktGroup DC-2016-0110-GB 2021-05/R2 • Subject to modifications 3

1 Overview

1.1 Introduction

We would like to thank you for purchasing our products.

C5-12 Controls are intended and designed for use with DENCO Products® in applica-

tions of Precision Air Conditioning (PAC and DENCO-OfficeCool® products). The con-

trols are designed for refrigeration systems and/or chilled water systems and it is

prohibited to use our controls and software for any other purposes. The equipment has

been designed and manufactured with a 'Quality Assurance System' within a strict

quality controlled environment to ensure that it reaches you in perfect condition.

For help, assistance, spares or your local office, please visit the following website for

contact details in your region:

https://www.flaktgroup.com/en/contact-us/

When contacting please provide details of (if known):

– Equipment model number

– Serial Number

– Date of supply

– Any order reference numbers

– Software version of equipment

1.2 Model numbers explained

Each product carries an 'Identification Plate' (sometimes referred to as 'serial plate')

inside the equipment for indoor units. For outdoor units, this maybe be on the external

casing. This identification plate carries information that is important and unique to the

unit.

Below shows an example serial plate for a Multi-DENCO A-Version unit.

For quick reference on the display, the "Model Type Code" is also shown in the top right

corner of the home screen. The text field is entered at the factory and does not need

to change.

PRODUCT RANGE / PROJECT TYPE Multi-DENCO® STANDARD

MODEL TYPE CODE / PED DMA030DPSIN4PN1 CAT. 1

SERIAL NUMBER

CONTRACT NO. / DATE OF BUILD 110196 02 / 2017

OPERATION MAN. / WIRING DIAGRAM PR-2013-0101 110196-101

VOLTAGE / PROTECTION RATING

400V-3PH-50HZ/60HZ+N

IP20

MAX. PRE-FUSE 32 TYPE D

FULL LOAD INPUT 11,4 kW

FULL LOAD CURRENT 29,9 A

COOLING MEDIUM

SOFTWARE VERSION

MWP HIGH PRESSURE SIDE 4,32 MPa

MWP LOW PRESSURE SIDE 4,32 MPa

CHILLED WATER 0,70 MPa

EMPTY WEIGHT 330,00 Kg

NOTE

6WC955

CV3.04.009B/DV4.06.009B

R410A (GWP 2088) & WATER

FIELD CHARGE (kg) CO2e

1015

FläktGroup Czech Republic a.s.

Slovanská 781, 463 12 Liberec XXV - Vesec, Czech Republic

ANY MODIFICATION MAY NOT BE REFLECTED ABOVE

( Field Charge (R410A) / 1000 ) x 2088 = CO

CONTAINS

GREENHOUSE

FLUORINATED

GASES

Overview C5-12 Controls

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1.3 Product series overview

C5-12 controls are designed to work across several DENCO® products including the

different versions within those product range. Some features and settings are not

applicable to all products, however with correct setting of the unit type within the con-

trols, only the applicable features are enabled.

C5-12 controls are only designed to work in a network with other C5-12 controls prod-

ucts. The controls can provide information and some control features to a Building

Management System (BMS).

For any support regarding C5-12 controls, please contact your local sales department.

1.4 Hardware – Controller

Refer to unit specific wiring diagram for more information on controller connections.

1: Connection to pGDX or pGD1 display

2: Connection to pGDT display and

DencoNet

3 - 9: Digital outputs 1 to 13

10: Inbuilt BMS port (RS485/Modbus or

Energy Monitoring if LECUs are fitted)

11: Inbuilt fieldbus port (CPY humidifier

and expansion modules)

12: Electronic expansion valve number 1

13: Electronic expansion valve number 2

14: RS485 fieldbus interface port (inverter

and energy monitoring or LECUs)

15: Optional serial data interface port (e.g.

pCOWeb / pCONet / LonWorks)

16: Not used

17: Suction pressure and temperature

analogue inputs

18: 24V AV power supply

19: 5V DC supply for discharge pressure

transducers

20: Analogue inputs 1 to 3

21: Analogue inputs 4 to 5

22: Controller address button

23: Controller address display

24: Power and overload LEDs

25: Analogue outputs 1 to 4

26: Digital inputs 1 to 8

27: Analogue inputs 6 to 8

28: Digital inputs 9 to 12

29: Digital inputs 13 to 14

30: EEV Ultracap

C5-12 Controls Overview

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1.5 Controller Inputs and Outputs

INPUTS

Digital

ID1 Unit Remote On/Off 24V AC (Open circuit = unit off)

ID2 Airflow Fail 24V AC (Open circuit = alarm condition)

ID3 Filter Blocked 24V AC

ID4 Heater Over-Temperature Thermostat 24V AC (Open circuit = alarm condition)

ID5 Water Detection 24V AC

ID6 Sump Pump Failure 24V AC

ID7 CombiCool Change-over 24V AC

ID8 Generator Run 24V AC

ID9 Refrigerant Leak Detection 24V AC

ID10 Auxiliary 1 Alarm 24V AC

ID11 Auxiliary 2 Alarm 24V AC

ID12 Oil Level Switch (092 & 130 models only) 24V AC

ID13 Compressor Run Signal (X-Type only) 24V AC

Analogue

U1 Return Air Humidity Sensor type: 4-20mA

U2 Return Air Temperature Sensor type: NTC

U3 Supply Air Temperature Sensor type: NTC

U4 Water Inlet / Ambient Temperature Sensor type: NTC

U5 Water Outlet / Liquid Pipe Temperature Sensor type: NTC

U6 Discharge Pressure / CW Feedback Sensor type: 0-5V / 0-10V

U7 Discharge Temperature Sensor type: NTC

U8 Supply Air Humidity / Airflow Volume Monitoring Sensor type: 4-20mA

NOTES!

(i) The digital inputs will operate within a voltage range of -15% to +10%

(20.4 V to 26.4 V), 50 or 60 Hz.

(ii) All digital inputs are functionally isolated from the rest of the controller.

(iii) For C5-12 Small; ONLY the following inputs are available:

Digital: ID1 ID8

Analogue: U1 U5

Overview C5-12 Controls

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OUTPUTS

Digital

NO1 Unit Status Relay Output Normally Open Contact

NO2 Heater 1 / DODC Heat Open / Thyristor Enable Relay Output Normally Open Contact

NO3 Heater 2 / DODC Heat Close Relay Output Normally Open Contact

NO4 Compressor 1 / DODC Cool Open / CombiCool

Secondary CW Open

Relay Output Normally Open Contact

NO5 Compressor 2 / DODC Cool Close / CombiCool

Secondary CW Close

Relay Output Normally Open Contact

NO6 Dehumidification Output Relay Output Normally Open Contact

NO7 Critical Alarm Relay Output Normally Closed Contact

NO8 Maintenance Alarm Relay Output Normally Closed Contact

NO9 CombiCool Primary CW DODC Open Relay Output Normally Open Contact

NO10 CombiCool Primary CW DODC Close Relay Output Normally Open Contact

NO11 FreeCooling Enable Relay Output Normally Open Contact

NO12 Shut-Off Damper Enable Relay Output Normally Open Contact

NO13 Heat Pump Enable Relay Output Normally Open Contact

Analogue

Y1 Evaporating Fan 0 – 10 V DC

Y2 Cooling Demand / FreeCool Demand / CombiCool

Secondary Valve / Heat Pump Demand

0 – 10 V DC

Y3 Condensing Pressure Control / Drycooler Fan 0 – 10 V DC

Y4 CombiCool Primary Valve 0 – 10 V DC

NOTES!

(i) All digital outputs are relay contacts rated at 24 V DC - 240 V AC 10 A

fitted with surge suppressor network.

(ii) All PCB tracks rated to withstand let through energy of a 24 V AC

control fuse (10 A).

(iii) All output relay contacts common to 24V AC.

(iv) DODC refers to Drive Open/Drive Close valve actuator.

(v) The evaporating fan output is to operate alongside the highest demand

of either the cooling, heating or humidification.

(vi) For C5-12 Small; ONLY the following inputs are available:

Digital: NO1 NO8

Analogue: Y1 Y5

C5-12 Controls Overview

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Expansion Modules

The following additional inputs and outputs are available, with an expansion module,

when specific options are selected.

NOTE!

The DIP switches on the expansion modules must be configured as shown below

to ensure correct operation.

pCOe Expansion I/O Module (address 1)

Analogue Input

B1 APS (Under Floor Pressure Control) Sensor type: 4-20 mA

Analogue Output

Y1 Thyristor / Remote Heating Demand 0 – 10 V DC

pCOe Expansion I/O Module (address 2)

Analogue Output

Y1 Remote Humidifier Demand 0 – 10 V DC

c.pCOe Expansion I/O Module (address 7)

Universal Output

U1 Thyristor / Remote Heating Demand 0 – 10 V DC

U2 Dehumidification Demand 0 – 10 V DC

NOTE!

The default software address is configured as 7.

The address is configured in software level 2.6.

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Safety and User Information C5-12 Controls

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2 Safety and User Information

The C5-12 controller and control strategy has been designed in accordance with state-

of-the-art technological and engineering standards as well as in conformity with the

recognized safety regulations.

It must be used in an appropriate manner for suitable purposes, following the details

contained within this manual and taking account of safety aspects and potential haz-

ards.

Failure to follow the instructions in this manual may result in danger to health and

safety, damage to materials and incorrect unit operation. Information within this

document advises on, but is not limited to, potential threats or concerns related to

health and safety. All users must be, or employ, a trained professional to, assess

issues relating to health and safety, before any use.

2.1 Availability of the operation manual

This manual must always be available at the site where unit is operating. Every person

working on the equipment must read this manual fully before commencing the work

and take note of all relevant information while performing a task.

The manual is intended for end users along with service and commissioning engineers.

2.2 Scope of the operation manual

THIS IS AN ORIGINAL OPERATION MANUAL VERIFIED BY THE MANUFACTURER.

This document has been developed by the manufacturer specifically for details relating

to the C5-12 controller and associated control strategy. Information within this docu-

ment is non-transferable. The information should not be used as a basis for any other

products.

Every effort is made to ensure that information contained within this manual is fair and

accurate, but FläktGroup endeavours to continuously update and improve all of our

products for our customers. Due to this continuous development, some information

contained within this manual may become outdated or no longer relevant. If you are in

any doubt regarding any information contained within this document, please contact

your local sales or support representative who will be happy to assist and enquire fur-

ther for you.

2.3 Document format

Significant information for each chapter will be highlighted in the following format:

– This symbol is used to indicate normal lists.

•This symbol indicates instructions to follow.

The result of an action is indicated with this symbol.

NOTE!

Here you will find additional details on using the Multi-DENCO unit.

C5-12 Controls Safety and User Information

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2.4 Safety-conscious working

The following is initial general advice to consider during various stages of a project.

More information can be found in the relevant Operation Manual for the product design.

2.4.1 At all times

2.4.2 Whenever opening/removing any panel/grille/door

You must wear suitable Personal Protective Equipment (PPE) at any point working

with a unit from the DENCO Products range. As a minimum we recommend:

•Wear safety footwear

•Wear eye protection

•Wear protective gloves

•Wear protective clothing

If operating for a prolonged period of time, noise reducing ear protection may be

required.

•Always conduct your own personal risk assessment to evaluate any further

requirements.

2.4.3 When unit is operational

2.5 Modifications and changes

Modification to the C5-12 control or display software, language, programming or

design is not permitted and will invalidate warranty.

Any requests for modifications, after the unit has been installed must be made through

your local or regional office.

Filters (especially used or dirty filters) are easily flammable. Leaking refrigerant can

catch fire and emit noxious substances.

– No smoking is allowed in direct proximity of any aspect of the

Multi-DENCO system.

– No open flames near the system.

At any time the unit is operational, rotating machinery and electrically charged com-

ponents are present. When the unit is not electrically isolated:

•Ensure all guards and doors are closed.

•Only remove guards or open doors:

– When the unit has been electrically isolated.

– Sufficient time has been allowed for the rotating fan momentum to cease.

– Sufficient time has been allowed for inverter circuits to discharge.

Safety and User Information C5-12 Controls

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2.6 Personnel selection and qualification

•Any individual working on the unit must read and understand all of this manual

before starting any works.

•Any individual working on this system shall be suitably qualified and licensed for the

region that the system in installed within.

•All personnel involved with the system must understand and observe any local

legislation regarding safe working practice.

2.7 Closing down procedure

It is essential for starting, closing down, emergency operation and fault finding to know

the location of the following components:

– Location of isolator for power distribution to the unit

– Main Isolator (integral to unit or local position)

– ON/OFF icon on the display of the unit

– All valves likely to affect water supply to humidifier (if fitted)

Short periods Should you require the equipment to be closed down for the weekend or Bank Holi-

days, no special precautions are required.

Each unit may simply be turned off by pressing the On/Off icon.

Alternatively, the "On/Off Times" can be configured in the controller software.

Long periods If the plant is to be shut down for longer periods (up to a month) this can be done by

switching off at the on/off icon, then opening the Main Isolator, and closing the local

mains water supply to the humidifier. When re-starting the plant, follow the same

instructions but in the reverse order.

Indefinitely When the equipment is to be taken out of service for an indefinite period we recom-

mend a qualified air conditioning engineer. An engineer will also be required for the

restarting of the equipment.

For units fitted with chilled water cooling and/or hot water heating, the mains power

should remain "ON" for at least the stroke time of the valve actuator to ensure that the

valve closes fully.

NOTE!

The units are designed for continuous operation and it is recommended that the sys-

tem is kept running overnight and at weekends to maintain stable room conditions.

C5-12 Controls Home Page and Status Screens

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3 Home Page and Status Screens

3.1 Home Page

The 'Home Page' is the controller's default display. You can return to this page by

pressing the 'Home button' on any screen.

Fig. 3-1

NOTICE

When starting the unit, during the start-up procedure:

•Do not touch the screen during start-up

– It will take approximately 40 seconds for the home page to display

When the 'Home Page' is shown, you can use the interface

1: Unit ON/OFF – Use this button to turn the

unit ON or OFF, without removing the

power supply (Units Status = OFF by

keyboard).

2: Unit Status – This display what state the

unit is in (see chapter 3.4).

3: Alarm Page – Use this to see any active

alarms and alarm history (see chapter 3.5).

4: Unit Graphs – Use this to see the history

of the sensor values.

5: Login – Use this to gain access to settings

6: Logout

7: Logged to Level

8: Status Information – Use this to view the

unit's status (see chapter 3.8).

9: Current Humidity– Depending on the

options fitted, this value could be return or

supply air and could be internal to the unit

or remotely positioned.

10: Model Reference – The model short code

of the unit design.

11: Help/additional information - On some

pages, additional information can be

displayed by pressing this button.

12: Time – The time configured in the unit.

13: Network Status – This shows whether the

network connection is healthy or

disconnected.

14: Unit Number – This is the same number

as number 18.

15: Unit Function Icons – This symbols show

what operations the unit is currently

performing: fans operating, heating,

cooling, humidification control (both

humidification and dehumidification).

16: Date – The date configured in the unit.

17: Active Alarm – This symbol will flash if

there is an active alarm.

18: Unit Number – This is used for

networking.

19: Current Temperature – Depending on the

options fitted, this value could be return or

supply air and could be internal to the unit

or remotely positioned.

Home Page and Status Screens C5-12 Controls

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3.2 Unit Status Icons

3.3 Screen saver

The screen saver is activated when the screen has not been pressed for 15 minutes.

Screen saver when unit has no active alarms.

Fig. 3-2

Screen saver when unit has active alarms.

Fig. 3-3

UNIT RUNNING – shown when the unit's fan(s) are running.

COOLING – shown when cooling demand is greater than 0%.

HEATING – shown when heating demand is greater than 0%.

HUMIDIFYING – shown when humidification demand is greater than 0%.

DEHUMIDIFYING – shown when dehumidification demand is greater than 0%.

Network Status (Healthy) – shown when there is a healthy connection between the Controller

and Display.

Network Status (Fault) – shown when there is an un-healthy connection between the Controller

and Display.

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C5-12 Controls Home Page and Status Screens

FläktGroup DC-2016-0110-GB 2021-05/R2 • Subject to modifications 13

3.4 Unit Status

The unit status on the Home page (see balloon 2 on Fig. 3-1) can be any of the follow-

ing;

Unit On The unit is operating.

Off by Alarms Disabled due to an alarms that requires a unit to be stopped for protection of equipment

or environment.

Off by BMS Disabled by a BMS signal to stop the unit.

Off by Time Zone Disabled due to the time control settings in Level 1.3.

Off by DI Disabled due to a break in the remote stop/start connection.

Off by Keyboard The unit has been switched off by the on/off icon on the display.

On HOA Mod Any of the units’ outputs has been configured for ‘Hand’ operation.

Stand-by Unit is configured for a DencoNet auto change-over and is currently in stand-by.

On Generator Mode There is a 24 Vac signal on ID8 and the unit is operating in 'cooling only' mode.

3.5 Active Alarms and Alarm History

Where this button is shown, you can press it to see the active alarms page (shown in

Fig. 3-4). If there is no active alarms, this button will be black instead of red.

Fig. 3-4

1: Use these checkboxes to select specific

alarms.

2: Use this to reset any selected alarms.

3: Use this to select all alarms.

4: Use this to see the Alarm History (see

Fig. 3-5).

5: Use this to see the Graph Plots (see

chapter 3.8).

6: Use this to return to the Home Page.

7: Use this scroll through the alarm list.

Home Page and Status Screens C5-12 Controls

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After selecting 'Alarm History', Fig. 3-5 is shown. The software can display 28 days of

alarms. On the 29th day, these alarms will over-write the 1st day's alarms.

Fig. 3-5

3.6 Alarms and Interlocks

1: Alarm event and description - the date is in

the format MM/DD/YYY.

2: Use this drop down menu to change the

view to show more or less history. The

range is from 5 minutes to 4 weeks.

3: After changing the history duration, this

'refresh' button will update the list to show

the correct alarms.

4: Use this to scroll through the alarm list.

5: This allows you to export the alarm history

to a USB memory device (SD card not

available). The USB port is on the under-

side of the touch display. The information is

exported into a Comma Separated Values

(CSV) file.

Alarm Description Relay Activated Reset Function Comments

Airflow Failure Critical Manual Switches unit off.

Filter Blocked Maintenance Manual Relay operation selectable in software.

Heater Over-Tem-

perature Alarm

Critical Manual Electric heater over-temperature thermostat activated

and disables heater outputs.

Water Detection Critical Manual Disable humidifier operation.

Note: there is an option to select the whole unit to be dis-

abled in the event of a water alarm.

Auxiliary Alarms

1 & 2

Maintenance Manual Custom text and relay operation selectable in software.

Sump Pump Failure Critical Manual Disables humidifier operation.

Refrigerant Leak

Detection

Critical Manual Monitoring only.

Return Air

Temperature

Sensor Failure

Critical Auto Disables temperature control outputs.

Return Air Humidity

Sensor Failure

Critical Auto Disables humidity control outputs.

C5-12 Controls Home Page and Status Screens

FläktGroup DC-2016-0110-GB 2021-05/R2 • Subject to modifications 15

Discharge Pressure

Sensor Failure

Critical Auto Disables cooling operation.

Water Inlet

Temperature

Sensor Failure

Critical Auto Activates CombiCool secondary circuit

Water Outlet

Temperature

Sensor Failure

Critical Auto Monitoring only.

Supply Air

Temperature

Sensor Failure

Critical Auto Disables temperature control outputs (if selected as sup-

ply air temperature control).

Supply Air Humidity

Sensor Failure

Critical Auto Disables humidity control outputs (if selected as supply

air humidity control).

Air Volume Pres-

sure Sensor Failure

Critical Auto Unit fans revert to ‘Normal’ operation when selected as

Air Volume Control.

APS Pressure

Sensor Failure

Critical Auto Unit fans revert to ‘Normal’ operation when selected as

APS Control.

Ambient Tempera-

ture Sensor Fail

Critical Auto Disables FreeCooling.

Discharge

Temperature

Sensor Failure

Critical Auto Disables cooling operation.

High Control Air

Temperature Alarm

Critical Auto Monitoring only.

Low Control Air

Temperature Alarm

Critical Auto Monitoring only (only activated if heating function select-

ed).

High Control Air

Humidity Alarm

Critical Auto Monitoring only (only activated if dehumidification func-

tion selected).

Low Control Air

Humidity Alarm

Critical Auto Monitoring only (only activated if humidification function

selected).

Low Supply Air

Temperature Alarm

Critical Auto Monitoring only (only activated if supply air temperature

control and heating function selected).

High Supply Air

Humidity Alarm

Critical Auto Monitoring only (only activated if supply air humidity con-

trol and dehumidification function selected).

CPY Offline Critical Auto No communication between the CPY humidifier module

and the C5-12 controller.

Parameters Not

Downloaded (CPY)

Critical Manual Humidifier configuration incorrect. Disables humidifier

operation.

High Current Alarm

(CPY)

Maintenance Manual Excessive current drawn by humidifier. Disables humidi-

fier operation.

Lack of Water Alarm

(CPY)

Maintenance Manual No water supply to humidifier or the bottle has reached

the end of its operational life. Disables humidifier opera-

tion.

High Conductivity

Alarm (CPY)

Maintenance Manual Excessive conductivity measured by conductivity probes.

Disables humidifier operation.

Alarm Description Relay Activated Reset Function Comments

Home Page and Status Screens C5-12 Controls

16 FläktGroup DC-2016-0110-GB 2021-05/R2 • Subject to modifications

Low Production

Alarm (CPY)

Maintenance Manual Humidifier not achieving target current. Disables humidi-

fier operation.

Humidifier Cylinder

Full Alarm (CPY)

Maintenance Manual Water reaches high level probes in humidifier bottle. Dis-

ables humidifier operation.

pCOe Offline Critical Auto No communication between the C5-12 controller and the

expansion module used for thyristor heating and/or APS.

pCOe 2 Offline Critical Auto No communication between the C5-12 controller and the

expansion module used for remote humidifier.

C,pCOe Offline Critical Auto No communication between the C5-12 controller and the

expansion module used for remote dehumidifier.

BMS Offline None Manual No communication between the C5-12 controller and the

BMS when ‘BMS Comms Alarm’ enabled.

Denconet Commu-

nication Alarm

None Manual No communication with other units on a Denconet net-

work.

Energy Meter

Device Off Line

None Auto No communication to the power meter.

Clock Alarm None Manual Fault on C5-12 controller. No effect to unit functionality.

LECU Offline None Auto No communication between LECU and C5-12 controller.

Circuit LP Threshold

Alarm

Critical Manual LP alarm threshold reached (default 2.5 bar) and dis-

ables cooling operation.

Circuit HP Thresh-

old Alarm

Critical Manual HP alarm threshold reached (default 41 bar) and disables

cooling operation.

Low Pressure

Switch Alarm

Critical Manual LP switch activated and disables cooling.

Note: DMA092 &130 only.

High Discharge Gas

Temperature

Critical Manual Discharge pipe temperature exceeds 120°C and disables

cooling operation.

Low Pressure

Differential Alarm

Critical Manual After five attempts to re-start, the differential between the

suction and discharge pressures is less than 1.3bar and

disables the cooling operation.

Envelope Alarm Critical Manual Compressor operating outside of the envelope limits for

4 hours and disables the cooling operation.

Low Superheat Critical Manual Superheat below alarm threshold (default 2K) for longer

than 60 seconds. Disables cooling operation.

Low Evaporating

Temperature

Critical Manual Evaporating temperature envelope low limit reached.

Disables cooling operation.

High Evaporating

Temperature

Critical Manual Evaporating temperature envelope high limit reached.

Disables cooling operation.

High Condensing

Temperature

Critical Manual Condensing temperature envelope high limit reached.

Disables cooling operation.

Low Suction

Temperature

Critical Manual Evaporating temperature envelope low limit reached.

Disables cooling operation.

Low Discharge

Superheat Alarm

Critical Manual Discharge Superheat below 12K for longer than 10 min-

utes. Disables cooling operation.

Alarm Description Relay Activated Reset Function Comments

C5-12 Controls Home Page and Status Screens

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High Discharge

Superheat Alarm

Critical Manual Discharge Superheat above 50K for longer than 10 min-

utes. Disables cooling operation.

EEV Motor Error Critical Manual Electronic expansion valve not communicating to C5-12.

Disables cooling operation.

Power+ Device Off

Line

Critical Auto No communication with Power+ Inverter, normally occurs

when there is no mains power supply to inverter.

Cooling will not operate.

Inverter Model Not

Compatible

None Manual Incorrect configuration.

Cooling will not operate

Danfoss Inverter Off

Line

Critical Auto No communication with Danfoss inverter (models 092 &

130 only). Cooling will not operate.

Danfoss Inverter

Alarm

Critical Manual Inverter compressor fault (models 092 & 130 only).

Disables cooling operation.

Danfoss Oil

Protection Mode

Alarm

Critical Manual Optical oil sensor detects low oil level following oil recov-

ery cycle (models 092 & 130 only).

Disables cooling operation.

Power+

Drive Disabled

Critical Auto HP safety switch activated.

Disables cooling operation.

Power+

Drive Over Temp

Critical Auto Inverter electronics temperature limit reached.

Disables cooling operation.

Power+

Motor Phase Failure

Critical Auto Power supply to inverter disrupted.

Disables cooling operation.

Power+

Over Voltage

Critical Auto Inverter detects a high voltage supplied to compressor.

Also a symptom of an over condensing condition.

Disables cooling operation.

Power+ Under Volt-

age

Critical Auto Inverter detects a low voltage supplied to the compres-

sor. Disables cooling operation.

Power+

Speed Failure

Critical Auto Inverter unable to manage the correct rotor speed. This

normally occurs during start-up and is caused by the

presence of liquid in the compressor.

Disables cooling operation.

Power+ Over

Current Failure

Critical Manual Excess compressor current measured. Also a symptom

of the system operating with a high discharge tempera-

ture. Disables cooling operation.

Alarm Description Relay Activated Reset Function Comments

NOTE!

There is an option in the software to disable the whole unit in the event of a com-

pressor alarm, i.e. cooling disabled.

Home Page and Status Screens C5-12 Controls

18 FläktGroup DC-2016-0110-GB 2021-05/R2 • Subject to modifications

3.7 Sensor Graph Plots

Fig. 3-6

1: Values on graph - the colour of the text

represents the colour of the line on the

graph. Values that can be shown are:

– Supply Air Temperature °C

– Return Air Temperature °C

– Chilled Water Outlet Temperature °C

– Return Air Relative Humidity %

– Supply Air Relative Humidity %

2: Scroll forward in time

3: Scroll backwards in time

4: Refresh the graph

5: Change the scale of the X-axis (time)

6: Change the scale of the Y-axis (sensor

values)

NOTE!

The graph will only show sensors that are installed and are set to 'Fitted' in the set-

tings (Level 3.3A).

C5-12 Controls Home Page and Status Screens

FläktGroup DC-2016-0110-GB 2021-05/R2 • Subject to modifications 19

3.8 Status Information Pages

Press this icon on the Home page to show a series of pages that show status and sen-

sor values. Use the left and right arrows to navigate to different pages. Once you have

navigated past the last page, it will go back to the first page.

As standard the following pages are shown:

– Setpoint & Demand Status

– Sensor Status

– Sensor Status - Expansion

Only if the equipment is installed and enabled in the settings are these pages shown:

– LECU(s) Status

– Airflow Status (requires Air Volume Monitoring)

– Humidifier Status

– Energy Meter



Home Page and Status Screens C5-12 Controls

20 FläktGroup DC-2016-0110-GB 2021-05/R2 • Subject to modifications

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FläktGroup DENCO® C5-12 Controller Owner's manual

Brand: FläktGroup

Model: DENCO® C5-12 Controller

Category: Thermostats

Type: Owner's manual

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FläktGroup DENCO® C5-12 Controller Owner's manual

FläktGroup DENCO® C5-12 Controller Owner's manual

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