Pfannenberg DTI 6201C, DTS 6201C, DTS 6301C, DTI 6301C Operating Manual

Operating Manual

Attachment and installation cooling units DTS and DTI Series 6201C / 6301C Multi-Controller (MC) – 230 V

Version 1.0, May 2017

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Preface

The skills and information provided in the ORIGINAL OPERATING MANUAL are required for assembly and safe operation of Pfannenberg cooling units. The information is presented in a brief, clearly arranged format. The chapters are numbered throughout. If you have the operating manual in digital format, the links are interactive. Various unit types are documented in this operating manual. Pfannenberg cooling units are subject to continuous improvement. Please understand that we must reserve the right to changes in design, equipment and technology. For this reason, no claims to specific features of the unit can be derived from the content of this operating manual.

 A film on the DTI cooling units can be viewed HERE.

Safety instructions and markings

DANGER

Identifies an exceptionally dangerous situation. Severe, irreversible injuries or death will occur if this notice is not observed.

DANGER

Identifies an exceptionally dangerous situation in connection with electrical voltage. Severe, irreversible injuries or death will occur if this notice is not observed.

WARNING

Identifies an exceptionally dangerous situation. Severe, irreversible or deadly injuries could occur if this notice is not observed.

CAUTION

Identifies a dangerous situation. Minor or moderate injuries could occur if this notice is not observed.

 Before notices and explanations.

* Legend notice



Placed before results of actions.

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Table of contents

1 Intended use ................................................................................................................................................... 5

1.1 General overview ................................................................................................................................... 5

1.2 Permissible usage conditions ................................................................................................................ 5

1.3 Duty of the operator ............................................................................................................................... 5

2 Unit description .............................................................................................................................................. 6

2.1 Description of use .................................................................................................................................. 6

2.2 Scope of delivery ................................................................................................................................... 6

2.3 Order options ......................................................................................................................................... 6

2.4 Functional description ............................................................................................................................ 7

2.4.1 Air flow functional principle .............................................................................................................................. 7

2.4.2 Controller ......................................................................................................................................................... 8

2.4.3 Refrigerant circuit functional principle .............................................................................................................. 9

2.4.4 Safety concept ................................................................................................................................................. 9

2.4.5 Accumulation of condensate ......................................................................................................................... 10

2.4.6 Energy-saving mode...................................................................................................................................... 10

2.4.7 Multimaster function ...................................................................................................................................... 11

2.5 Type plate ............................................................................................................................................ 12

2.6 Technical data...................................................................................................................................... 13

2.6.1 Refrigeration data .......................................................................................................................................... 13

2.6.1 Electrical data ................................................................................................................................................ 13

2.6.2 Dimensions .................................................................................................................................................... 13

2.6.3 Other unit data ............................................................................................................................................... 13

3 Assembly and initial commissioning ......................................................................................................... 14

3.1 Transport .............................................................................................................................................. 14

3.2 Storage ................................................................................................................................................ 14

3.3 Unpacking ............................................................................................................................................ 15

3.4 Assembly ............................................................................................................................................. 15

3.4.1 General assembly requirements .................................................................................................................... 16

3.4.2 Mounting M8 jack rings .................................................................................................................................. 16

3.4.3 DTS cooling unit assembly (side attachment) ............................................................................................... 17

3.4.4 DTI cooling unit assembly (installation) ......................................................................................................... 19

3.5 Electrical connection ............................................................................................................................ 21

3.5.1 Multi-Controller (MC) electrical circuit diagram .............................................................................................. 21

3.5.2 Multimaster connection .................................................................................................................................. 21

3.5.3 Door contact switch ....................................................................................................................................... 22

3.5.4 Mains supply connection ............................................................................................................................... 23

3.5.5 Adapting the upstream fuse /transformer options .......................................................................................... 25

3.5.6 Collective fault signal ..................................................................................................................................... 25

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4 Operation ...................................................................................................................................................... 26

4.1 General functions ................................................................................................................................. 26

4.2 Multi-Controller operation .................................................................................................................... 27

4.3 Carrying out menu settings .................................................................................................................. 27

4.4 Operation of the cooling unit ................................................................................................................ 29

4.5 Service interface .................................................................................................................................. 30

4.6 Error messages.................................................................................................................................... 31

4.7 LCD error messages ............................................................................................................................ 34

5 Service and Maintenance ............................................................................................................................ 35

5.1. General cleaning .................................................................................................................................. 35

5.2 Cleaning the cooling unit - Unit cover removal .................................................................................... 36

5.3 Cooling unit and filter mat cleaning tasks ............................................................................................ 37

5.4 Maintenance ........................................................................................................................................ 38

5.5 Maintenance checklist template........................................................................................................... 39

5.6 Decommissioning ................................................................................................................................ 40

6 Troubleshooting ........................................................................................................................................... 41

7 Spare part orders / accessory orders ........................................................................................................ 42

8 Terms of warranty ........................................................................................................................................ 42

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1 Intended use

1.1 General overview

The Pfannenberg attachment and installation cooling units of the DTS and DTI series are stationary cooling units for the dissipation of heat from switch cabinets. They are available in two versions:

 The DTI cooling units are partially recessed in the side or installed in the door.  The DTS cooling units are mounted on the side or on the door.

The cooling units have different cooling outputs. For exact watt specifications, see Technical data. The cooling units have cut-out compatibility with air/air heat exchangers and air/water heat exchangers. Use of aluminum filters, fleece filters and fluted filters is possible with an additional adapter.

The cooling units are available with different controllers. Cooling units are available with a standard controller (SC) or a Multi-Controller (MC). These controllers are regulating units for the adjustment of refrigeration functions and operating data. They also enable readouts of system messages and diagnostic data. The Multi-Controller (MC) is also equipped with a Multimaster function and energy saving mode.  For detailed specifications for the controller, see Technical data, Electrical connection and System information.

All Pfannenberg cooling units are ROHS-compliant and free from:

• Silicone connections

• PCT, asbestos, formaldehyde, cadmium

• Moisture-impairing substances

1.2 Permissible usage conditions

• The permissible ambient air temperature range of DTI/DTS cooling units is +15°C (+59°F) to +55°C (+131°F).

• The permissible storage temperature of DTI/DTS cooling units must not exceed +70 °C (+158°F).

1.3 Duty of the operator

The operator must ensure that the cooling units are used exclusively as intended and dangers of all types to the life and limb of users or third parties are avoided. In addition, accident prevention regulations and recognized safety rules are to be observed. The operator must ensure that all users have read and understood this operating manual. Non-observance of this operating manual will void the warranty. The same applies if improper work has been carried out on the unit by the customer and/or third parties without the approval of the manufacturer.

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2 Unit description

2.1 Description of use

Pfannenberg DTS and DTI series attachment and installation cooling units are designed to dissipate heat from switch cabinets. Sensitive components in the switch cabinet are protected. Condensate arising during the cooling is removed by an integrated system.

 The cooling units operate with very low flammable refrigerant that is not harmful to the ozone layer.

2.2 Scope of delivery

The shipment consists of the following contents:

 DTI/DTS cooling unit  Cooling unit quick guide  Accessory kit: Appropriate seal, fastening material, electrical plug connector, etc. for the specific unit type  Special accessories, if applicable

2.3 Order options

WARNING

Spare parts from third-party manufacturers can damage the unit

 Only original parts are subject to the manufacturer's quality control.

 Only use specially harmonized manufacturer parts for safe and reliable operation.

 For Pfannenberg spare part numbers, see Spare part orders.

There is an optional expansion with a filter adapter for various filter mats (fleece filters, fluted filters and metal filters).  For Pfannenberg part numbers for accessory orders, see Ordering of accessory parts.

WARNING

Danger due to impermissible use of units

Inappropriate use of the units can cause severe accidents.

 Cooling units must only be used in stationary operation.

The DTI/DTS cooling units are only approved for stationary operation. As cooling units with protection rating IP 54, the cooling units are essentially dust-protected. Limitation: Dust can still penetrate after continuous exposure. The cooling units are resistant to spray water, but not a constant water jet.

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2.4 Functional description

2.4.1 Air flow functional principle

Item

Designation

Item

Designation

1

Ambient air outlet

2

Warm air inlet

3

Ambient air inlet

4

Cold air outlet

5

Switch cabinet

6

DTI unit cover

7

DTS unit cover

 The upper part of the figures – Air flow principle front view – shows the DTI cooling unit and the lower part

shows a DTS cooling unit.

CAUTION

Danger due to the release of very warm air The air outlet can become very warm depending on the ambient temperature.

 Keep body parts away from the air outlet.

 For the ambient temperature and air outlet ratio, see Technical data.

Figure 1 - DTS/DTI switch cabinet air flow principle

front view

Figure 2 - DTS/DTI switch cabinet air flow principle

side view

7

1 1 2 3 3 4 5 6 6

5

7

5

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2.4.2 Controller

Controllers are regulating units for the adjustment of refrigeration functions and operating data. They enable readouts of system messages and diagnostic data. The controllers have a service interface which enables various configurations. There is also a connection for collective fault indications.

Item

Control panel

Function

1

Green LED light

- Displays the operating mode: Permanently illuminated = fault-free / blinking = operational fault

2

LCD (4-digit)

- Displays system information: Temperature measuring unit, energy function, operating mode, system data, error number and menu settings / menu items / menu level.

3

BACK button

- Activation of menu settings.

- Jump back to the next higher menu level.

4

SCROLL UP button

- SCROLL UP through the menu items or display elements in the current menu level

5

SCROLL DOWN button

- SCROLL DOWN through the menu items or display elements in the current menu level

6

SET button

- Selection of the current menu item.

- Jump to the next lower menu level.

Cooling units with a multi-controller (MC) have a control panel with a green LED light (1) and an LCD (2). They are located on the unit cover. Permanent illumination of the green LED light (1) while the mains voltage is connected indicates fault-free operation. System information is displayed in the LCD. The following system information can be displayed:

LCD

System information

Display – Temperature (°C/°F) of the regulating sensor in normal operating status.

Display – Stop mode execution. Door is open. Alternating display with temperature and stop mode, with fault Er00. Display: StoP Er00Temperature.

Display – Energy function execution, activated in energy saving mode Alternating display with temperature display (°C/°F).

Display – Error number when a fault occurs. In case of a fault, error number (Er01-Er15) is displayed alternating with temperature (°C/°F). Exception, fault ER00: Display StoP Er00Temperature.

In case of an operating fault or a malfunction, the gray LED light (1) begins to blink and the LCD (2) displays error numbers alternating with the temperature. For details, see Error messages .

1 2 5 4 6

3

Figure 3 - Multi-Controller (MC) control panel

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2.4.3 Refrigerant circuit functional principle

Item

Designation

Item

Designation

1

Compressor

2

Condenser

3

Expansion valve

4

Evaporator

5

Condenser fan (external)

6

Evaporator fan (internal)

7

Electronic control with temperature sensor

The cooling units are comprised of various components; see the figure Refrigerant circuit.

 The compressor (1) compresses the refrigerant under high pressure. The temperature increases.  This heat is released to the ambient air in the condenser (2). The refrigerant liquefies.  The condenser fan (5) draws room air through the condenser (2) and releases it to the environment.  A pressure drop occurs when the refrigerant passes through the expansion valve (3).  Inside the evaporator (4), the refrigerant absorbs heat from the air inside the switch cabinet and evaporates.

The air inside the switch cabinet is cooled and dehumidified.

 The evaporator fan (internal) (6) draws the air inside the switch cabinet through the evaporator (4) and releases

the cooled air back to the switch cabinet.

 The cooling units are controlled with a temperature sensor (7). It detects the air temperature inside the switch

cabinet.

2.4.4 Safety concept

WARNING

Danger due to modified safety equipment

Non-functioning or defective safety equipment can cause severe accidents.

 Any changes to the unit, particularly the safety equipment, are prohibited.

 In case of defective safety equipment, shut down the unit and decommission it immediately.

• Cooling units have a pressure switch tested in accordance with EN 12263. It reacts to a pressure increase in the refrigerant circuit by shutting off automatically.

• Fans and compressors are protected from overloading and overheating: e.g. the compressor is protected against overclocking.

Additional protective functions (only cooling units with anti-freeze option):

 If there is a risk of ice formation, switch off the compressor and the fans.  This shut-off function is not withdrawn until a system restart.

1

2 3 5 6 4

7

Figure 4 - Refrigerant circuit

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2.4.5 Accumulation of condensate

NOTE

Condensate flowing back into the switch cabinet can damage the electronic components

Internal temperatures below the dewpoint or damaged switch cabinet seals cause excessive accumulation of condensate.

 Regular inspection of the seals assures protection against heavy condensate accumulation.

 Installation of a door contact switch reduces the accumulation of condensate when the switch cabinet is

open.

If the evaporator cools down, condensate can accumulate. In order to prevent damage to the switch cabinet and the cooling units, the condensate is removed. The integrated condensate evaporator releases the condensate to the environment. For safety reasons, there is a drain port with drain hose on the condensate evaporator.

 Accumulating condensate is collected by a condensate collecting bottle. It is available as an accessory.  In case of questions about the cooling units or accessories and spare part orders, always specify the serial

number; see Spare part orders.

2.4.6 Energy-saving mode

Cooling units with Multi-Controller (MC) are equipped with energy-saving mode. Therefore, it has a second TS2 temperature sensor (1), which is installed externally on the cooling unit. The TS2 temperature sensor (1) monitors the switch cabinet interior temperature.

 In the condition as supplied, energy-saving mode is activated when cooling operation is not activated for 30

minutes. The LCD then displays energy function "EN", see system information

 If the switch cabinet interior temperature increases above the adjusted temperature setpoint during active

operation, a cooling command is sent and energy saving mode is interrupted.

 Cooling mode remains active until the temperature setpoint, minus hysteresis, has been reached. Energy-

saving mode always activates 30 minutes after the temperature setpoint is reached.

 If the temperature setpoint is undercut by the external TS2 temperature sensor (1) in energy-saving mode, the

evaporator fan (internal) switches off. The temperature setpoint is measured minus hysteresis.

 If the external TS2 temperature sensor (1) detects a temperature that exceeds the temperature setpoint, the

evaporator fan (internal) switches on. The value of the temperature setpoint is measured plus hysteresis.

 If no fault occurs, the fault indication output is closed in energy saving mode.

1

Figure 5 – TS2- Temperature sensor

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2.4.7 Multimaster function

 The Multimaster function can control up to six connected cooling units (bus functions). It regulates the cooling

mode as follows:

 The first cooling unit that reaches the "TSet + 2K" switching threshold activates cooling mode in the bus

function.

 The cooling mode is ended by the last unit that undercuts the switching threshold “TSet - 2K“.  Energy-saving mode is ended by the cooling command of one of the cooling units in bus function.  Energy-saving mode is re-activated 30 minutes (condition as supplied) after the last cooling command of one of

the cooling units in the bus function.

 All cooling units in the bus function can activate or end cooling mode or energy-saving mode. There is no

"master and slave function".

 For electrical connection, see Electrical connection.

Figure 6 – Multimaster control

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2.5 Type plate

WARNING

Danger due to damage of units

Disregarding type plate specifications can result in severe accidents.

 Always observe the specifications on the type plate when installing and maintaining the units.

 The type plate is located on the rear side of the cooling unit housing.  The figure shows the standard version for EU Member States. The type plate version may differ in other

countries.

Item

Designation

Item

Designation

1

Frequency

2

QR code

3

Options

4

CE mark

5

Protection type

6

Protection

7

Cooling capacity

8

Coolant pressure

9

Power rating

10

Coolant

11

Protection type

12

Exterior / interior ambient conditions

13

Start-up current

14

Nominal current (UL 60 HZ)

15

Nominal current

16

Serial number

17

Part number

18

Unit type

19

Manufacturer logo

20

Rated operating voltage

2

5 6 7

8

10

12

14

13

15

16

18

19

17

3

4

20

Figure 7 - Type plate for EU Member States

11

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2.6 Technical data

2.6.1 Refrigeration data

Designation

Model DTI/DTS 6201C

Model DTI/DTS 6301C

Cooling capacity A35 / A35 * / **

Q 0

1000 W

1500 W

Cooling capacity A50 / A35 * / **

Q 0

590 W

850 W

Refrigerant type *

R 134a

Refrigerant quantity *

500 g

Temperature setpoint (factory setting)

+35°C (+95°F)

Fault indication: Switch cabinet interior temperature (factory setting)

> +50°C (+122°F)

Ambient air temperature

+15°C (+59°F) bis +55°C (+131°F)

Switch cabinet interior temperature

+25°C (+77°F) bis +45°C (+113°F)

Air volume flow, exterior circuit

885 m³/h

Air volume flow, interior circuit

885 m³/h

Condensate separation

Condensate evaporator

2.6.1 Electrical data

Designation

Model DTI/DTS 6201C

Model DTI/DTS 6301C

Rated operating voltage * / ****

230 V

Rated frequency *

50 / 60 Hz

Functional range

DIN IEC 60038

50 Hz

60 Hz

50 Hz

60 Hz

Power consumption *

P

el

A35/A35

445 W

560 W

705 W

820 W

Rated current*

I

nom max

2,04 A

2,9 A

5 A

5,2 A

Starting current*

I

Start max

9,1 A

16 A

2.6.2 Dimensions

Designation

Model DTI/DTS 6201C

Model DTI/DTS 6301C

Height DTS

968 mm

Height DTI

962 mm

Width

410 mm

Depth with cover (standard)

253 mm

Installation depth DTI

60 mm

Weight

DTI: 40 kg / DTS: 41 kg

DTI: 44 kg / DTS: 45 kg

Installation attitude

Vertical

Unit construction

Standard: Steel

2.6.3 Other unit data

Designation

Model DTI/DTS 6201C

Model DTI/DTS 6301C

Anti-corrosion protection

Standard: Galvanized, electrostatic powder-coated (200°C) Variant: Stainless steel cover

Protection type

When used as intended: IP 54 against the switch cabinet (EN 60529). IP 34 against the environment (EN 60529).

* Data on the type plate. ** Use of optional filter mats reduces the cooling capacity. *** Max. rated current UL at 60 Hz. **** With a change to the rated operating voltage, adapt the

upstream fuse; see Adapting the upstream fuse .

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3 Assembly and initial commissioning

3.1 Transport

WARNING

Danger due to uncontrolled movements

Improper securing of the unit can result in severe accidents.

 Loading must only be carried out by trained, qualified personnel.

 Lash the unit correctly for transport on a truck or trailer.

 Only use lashing straps with an adequate rated strength.

 Use slip-resistant materials for securing, e.g. anti-slip mats.

 When loading by crane, do not walk or stand under the raised units.

NOTE

Danger of material damage during transport and setting down of the units.

 Improper device securing or uncontrolled movements can cause damage.

 Exercise maximum caution during movement and transport of the units.

 Always transport the unit in the position of use.

Always transport the cooling units using the packaging provided by the factory. It comprises an outer carton, base plate and padding at the top and base.

Transporting cooling units

Requirements

- Cooling units must be in the packaging provided by the factory.

Required tools and material

- Lashing straps, loading crane, if applicable

Procedure

 Secure correctly for transport with lashing straps. Always transport in the position of use.  Always raise cooling units by the housing.  Always raise cooling units slowly and evenly and set down safely.



The cooling unit was transported and loaded correctly.

 The cooling unit can also be loaded using M8 jack rings; for this purpose, the M8 jack rings are first screwed

into the cooling unit; see Mounting M8 jack ring.

3.2 Storage

• Do not expose the cooling unit to temperatures above +70 °C during storage.

• Always store the cooling unit in the position of use.

 The warranty will no longer apply if these instructions are not observed.

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3.3 Unpacking

WARNING

Danger of accidents due to the heavy weight of the units

Uncontrolled movements of the units during assembly can cause accidents.

 Use suitable lifting equipment and secure units to prevent accidents.

 Also secure assembled components.

CAUTION

Danger of injury due to sharp edges

 For manufacturing reasons, the metal edges of the unit may have burrs.

 Wear gloves during service and assembly work.

 Perform a visual inspection for transport damage when unpacking the cooling units. Take note of any loose

parts, dents, scratches, visible loss of oil etc.

 Inspect and secure the packaging material for any loose functional parts before disposal.  Report any damages to the freight carrier immediately. Observe the "Terms for Cases of Damage".  Precise information about defects, including possible photos must be provided for the handling of warranty

claims. Always specify the type designation and serial number.

 The "General Terms for Deliveries and Services" of ZVEI (Zentralverband der Elektrotechnischen Industrie;

Central Association of the Electrical Engineering and Electronics Industry in Germany) according to the latest revision apply.

3.4 Assembly

DANGER

Life-threatening danger due to electric shock

Live units and exposed connection cables can generate an electric shock and cause severe accidents.

 Work on electrical connections must be carried out exclusively by trained, qualified electricians.

 Before assembly, de-energize all supply lines to the separate fuse or a main switch, disconnect the system

and secure to prevent re-connection.

 Test to ensure the absence of voltage on the unit.

CAUTION

Danger of crushing during assembly of the unit

There is a danger of crushing between the switch cabinet and frame of the unit during assembly.

 Keep body parts out of the space between the frame and unit cut-out.

 Work carefully and wear gloves.

NOTE

Switch cabinet installation hazard due to assembly chips

When making the cooling unit cut-outs, assembly chips can fall into the switch cabinet.

 When assembling the switch cabinet, protect against contaminants and use protective covers.

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3.4.1 General assembly requirements

The following general requirements must be followed for safe and reliable operation of the cooling units:  Select an assembly location for the switch cabinet which will guarantee adequate ventilation of the cooling unit.

A minimum clearance of 200 mm between units and the nearest wall must be observed.

 Installed components in the switch cabinet must not impede air circulation.  Secure the switch cabinet against tipping.  Ensure that provided hinges can support the additional weight of the cooling unit.  The cooling unit can be assembled with and without an external unit cover.  Protect the installation location from heavy contamination with covers.

3.4.2 Mounting M8 jack rings

WARNING

Danger of accidents due to unapproved crane transport

Movement of switch cabinets with integrated cooling units can result in accidents.

 Only lifting by M8 jack rings is permitted for the cooling unit.

 Ensure that jack rings and unit threads are not damaged or deformed.

 Only use jack rings with an adequate thread length and ensure that they are securely seated.

The cooling units have threads for M8 jack ring installation. M8 jack rings can be installed in cooling units for crane transport.

Item

Designation

Item

Designation

1

DTS cooling unit M8 jack rings

2

Unit cover screws

Requirements

- The factory-provided packaging has been removed from the cooling units.

- Observe the minimum screw depth of the M8 jack rings.

- M8 jack rings and cooling unit threads must be free from damage (corrosion and deformation).

- The unit cover screws (2) have been removed.

Procedure

 Screw in the two M8 jack rings (1) completely with the appropriate thread depth.  Check to ensure the proper seating of the M8 jack rings in the cooling unit.



The M8 jack rings are screwed in the cooling unit and the unit can be moved.

Figure 8 - DTI/DTS cooling unit M8 jack rings

1

2

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3.4.3 DTS cooling unit assembly (side attachment)

Item

Designation

Item

Designation

1

Holes

2

Device contour

3

Cut-out

Make cut-out for the DTS cooling unit

Requirements

- All general requirements have been fulfilled; see General assembly requirements

- The unit is de-energized.

Required tools and material

- Saw

- Use a switch cabinet cutter, if applicable

- Protective covers

Procedure

 Use a protective cover to protect the switch cabinet from chips.  Provide the switch cabinet with cut-out (3) and holes (1). For the prescribed dimensions, refer to the figure

exterior view of the switch cabinet.

 Deburr the cut edges.  Remove chips and assembly waste from the switch cabinet.

 Cut-out and holes have been made.

Figure 9 - Switch cabinet exterior view

Holes for DTS cooling unit

Figure 10 - Switch cabinet exterior view

Cut-out for DTS cooling unit

1

1 3 2

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Install profile seal on the DTS cooling unit (side attachment)

WARNING

Danger of accidents due to incorrectly installed seals

Leaky seals can allow moisture to penetrate and cause short-circuits.

 Install the seal so that it provides a tight seal to the switch cabinet.

 Always inspect seals during cleaning and maintenance.

Item

Designation

Item

Designation

1

Profile seal

2

Cut-out for seals

3

Switch cabinet interior fastenings

4

Profile seal slotted ends

Install profile seals and assemble

Requirements

- Cut-out for the DTS cooling unit have been made; see figure DTS cooling unit assembly (side attachment).

- The cooling unit is de-energized.

Required tools and material

- Profile seal (1)

- Installation tool

- Accessory kit: Threaded bolts, screws, nuts, washers

Procedure

 Insert profile seals (1) on the sheet metal edge of the cut-outs (2). Fit the seals with the slotted ends (4) down.  Screw in the two supplied threaded bolts (accessory kit) in the upper fastening points of the DTS cooling unit.

Suspend the cooling unit on the switch cabinet with the threaded bolts installed from outside. Tighten the screws on the DTS cooling unit on the switch cabinet interior (3). Use the supplied screws, nuts and washers (accessory kit) to fasten the unit. Firmly tighten the screw fasteners so that the profile seal is pressed together to a thickness of 2 mm.



The DTS cooling unit is attached to the switch cabinet and ready for electrical connection;

see Electrical connection.

Figure 11 – Install profile seal

DTS cooling unit (side attachment)

1 2 3

4

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3.4.4 DTI cooling unit assembly (installation)

Item

Designation

Item

Designation

1

Air inlet

2

Air outlet

3

Device contour

Make cut-outs for the DTI cooling unit

Requirements

- All general requirements have been fulfilled; see General assembly requirements

- The unit is de-energized.

Required tools and material

- Saw

- Use a switch cabinet cutter, if applicable

- Protective covers

Procedure

 Use a protective cover to protect the switch cabinet from chips.  Provide the switch cabinet with cut-outs. For the prescribed dimensions, refer to the figure switch cabinet

exterior view.

 The four corner cut-outs can be rectangular or have a maximum R = 4 mm.  Deburr the cut edges.  Remove chips and assembly waste from the switch cabinet.

 Cut-outs have been made.

Figure 12 - Switch cabinet exterior view

DTI cooling unit cut-outs

1 2 3

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DTI cooling unit switch cabinet assembly (installation)

Item

Designation

Item

Designation

1

Catch spring

2

Fastening spring (top)

3

DTI cooling unit

4 A

Housing - cut-out

4 B

Housing - cut-out

5

Fastening spring (bottom)

6

Switch cabinet wall / switch cabinet door

 The film for DTI cooling units with assembly instructions is available HERE.

Switch cabinet assembly

Requirements

- The cut-out for the DTI cooling unit has been made; see the figure DTI cooling unit assembly.

- The cooling unit is de-energized.

Required tools and material

- Assembly tool, fastening springs (2)/(5) (accessory kit)

Procedure

 Fit the cooling unit (3) in the cut-out from outside; see the figure DTI cooling unit assembly.  Push the cooling unit (3) into the switch cabinet (6) until the unit seal is applied.  The catch spring (1) on the top side of the unit audibly engages. The cooling unit (3) is now secured from falling

out.

 Engage the fastening springs (2)/(5) on the inside of the switch cabinet (6).  Press the fastening springs in with your hand so that the retaining bracket engages in the housing cutout (4 A).  Use the fastening springs in the rear housing cut-outs (4B) for switch cabinets with reinforcement frame.  Mount the cooling unit (3) so that the emergency condensate drain is arranged at the bottom of the unit.

 The DTI cooling unit is attached to the switch cabinet and ready for Electrical connection.

2 3 4 A

1

6

4 B

5

Figure13 – DTI cooling unit assembly

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3.5 Electrical connection

3.5.1 Multi-Controller (MC) electrical circuit diagram

DANGER

Life-threatening danger due to electric shock

Live units and exposed connection cables can generate an electric shock and cause severe accidents.

 Work on electrical connections must be carried out exclusively by trained, qualified electricians.

 Ensure that the unit is voltage-free before routing all electrical connections.

Item

Designation

Item

Designation

Item

Designation

C1

Starting capacitor

F1

High-pressure pressostat

F4-F5

Fuse

LP1

Controller

LP2

Display control unit (MC)

M1

Compressor

M2

Condenser fan (external)

M3

Evaporator fan (internal)

MM1

Multimaster/ input

MM2

Multimaster output

S1

Door contact

S1.1

Door open

S1.2

Door close

SK

Fault signal contact (1,2)

TK

Door contact/ signal

(4,5)

TS1

Temperature sensor

(internal)

TS2

Temperature sensor

(external)

X28

Service interface (TTL)

X40

Ground terminal contact

X50

Mains terminal contact

X51

Multimaster terminal contact

X54

Door contact+ terminal contact +Fault indication

Optional

3

Power cable

Fault

Max. 2,5 mm

2

AWG 14

085 000487 11189-868

S1.1 S1.2

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3.5.2 Multimaster connection

 The Multimaster function can control up to six connected cooling units (bus functions). The connection takes

place on the input and output side via two contacts MM1 and MM2. The contacts are supplied with low voltage (<20V, 20mA) from the cooling unit.

 A shielded cable with twisted pairs is used to prevent interference.  If shielded cables are not used, ensure that there are no sources of interference in the immediate vicinity.

Sources of interference include: Supply lines and components with elevated electromagnetic radiation.

3.5.3 Door contact switch

WARNING

Danger due to connection of external voltage at the input of the door contact

External voltage can cause severe accidents.

 Connection of external voltage to the input for the door cabinet is prohibited.

 The input/door contact provides low voltage (< 20V, 20mA) for the door contact switch.

Installation of a door contact switch increases safety and prevents increased accumulation of condensate.  If a door contact switch has not been connected, the connection contact (S1) must always be bypassed.

Door contact switch installation

Requirements

- The cooling unit is de-energized.

Procedure

 The door contact switch is connected to the S1 connection; see Electrical connection or the electrical circuit

diagram in the housing cover.

 The door contact is supplied with low voltage, <20V, 20 mA, from the cooling unit.  Connect the shielding to the terminal for functional earth on one end.  A shielded cable with twisted pairs is used to prevent interference.  If shielded cables are not used, ensure that there are no sources of interference in the immediate vicinity.

Sources of interference include supply cables and components with increased electromagnetic radiation, including frequency converters, motor drives, etc.

 The door contact switch is connected. The motors switch off when the switch cabinet is opened.

Figure 14 – Multimaster control

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3.5.4 Mains supply connection

WARNING

Potential danger due to incorrect cables

An incorrect cable cross-section will cause the cable to overheat. Scorched insulation can cause fires.

 The cable cross-section (4) matches the output required for the power consumption and is

0.5 – 2.5mm² or AWG 20 to AWG 14.

The following general requirements must be ensured for safe and reliable operation of the cooling units:

• Upstream installation of a supply-side temperature regulator is prohibited.

• Connect the upstream fuse specified on the type plate as wiring protection; see Type plate and Adapting the

upstream fuse.

• Ensure that the type plate specifications for rated values match the present values for mains voltage and mains frequency; see Type plate.

• Always connect the cooling unit to the mains by means of a separating device (switch/contactor).

 The separating device must have a contact opening of 3 mm. The separating device is installed by the

customer.

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Cooling unit electrical connection

Item

Designation

Item

Designation

1

Connecting plug

2

Cage terminal - max. 3.5 x 3.0 mm

3

Screwdriver (slotted)

4

Cable - 0.5 – 2.5mm²

Requirement

- All general requirements for safe and reliable operation are assured; see Mains supply connection

- The cooling unit is de-energized.

Procedure

 Connect the cable (4) with the connecting plug (1)/(accessory kit) as specified in the electrical circuit diagram;

see Electrical connection.

 For electrical connection, insert the screwdriver (3) into the cage terminal (2) and connect the cables (4) to the

cooling unit with the connecting plug (1).

 Insert the screwdriver firmly into the cage terminal (2). Never twist the screwdriver; otherwise the cage terminal

(2) will be damaged.

 Before switching on, ensure that the mains voltage matches the upstream fuse; see Electrical connection.  The cooling unit is connected electrically.

1

3 2 4

Figure 15 - Cooling unit plug connection

1

2

3

4

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3.5.5 Adapting the upstream fuse /transformer options

 Only cooling units with the rated operating voltage 400V / 460V can be optionally connected to a different mains

voltage.

 Cooling units with 230V / 115V do not have any transformer options. Therefore, adaptation of the upstream fuse

is not necessary.

3.5.6 Collective fault signal

 Two connections are provided for connection of the collective fault signal. They are marked with the item

designation SK; see Electrical connection.

 The fault signaling contact is potential-free.  Ensure that the contact is loaded with a maximum of 230V, 1 A.

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4 Operation

4.1 General functions

NOTE

Danger of damage to the cooling unit

Operation without the unit cover prevents the adequate supply of air to the condenser and limits the intended heating function.

 Only operate the cooling unit with the unit cover installed.

The Multi-Controller (MC) has a control panel with a green LED light (1). If an error occurs, the green LED light (1) blinks and various system information is displayed in the LCD (5); see system information . If assembly and installation are completed, switch on the power supply to the cooling unit.

 The cooling unit starts its operation and the LED light (1) illuminates green continuously.

 After the supply voltage has been connected and the door is closed, the units run continuously.

 Exception: Energy-saving mode and cooling units with anti-freeze option.  The external temperature sensor controls the energy-saving mode; see TS2 temperature sensor.

 The Multimaster function can connect up to six cooling units in the bus function.  The LCD (5) displays the current operating statuses; see System information.  The cooling unit (2) is equipped with an electronic control unit. An internal temperature sensor (4) detects the

temperature of the air sucked in from the interior of the switch cabinet (3). If the upper or lower limit temperature is exceeded or undercut, a fault indication is triggered.

 The green LED light (1) blinks and the LCD (5) displays the error number with temperature (°C/°F).

 The ambient conditions and switch cabinet interior temperatures must correspond to the prescribed technical

data; see Technical data.

 The ambient temperature must be less than 55°C; see Air flow functional principle.

Figure 16 – Electronic control function

1 4 3

5

2

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4.2 Multi-Controller operation

The control panel has four menu settings that are displayed on the LCD (1).

LCD

Menu setting

Input

SetP: Switch cabinet temperature setpoint

0 – 90 °C

Lit¯: Maximum switch cabinet temperature value (high limit value)

- 55 – 95 °C

Lit_: Minimum switch cabinet temperature value (low limit value)

- 55 – 95 °C

Unit: Unit of the switch cabinet temperature

°C / °F

4.3 Carrying out menu settings

Requirement

- Cooling unit has started operation.

- LED light (6) of the control panel illuminates green.

Procedure

 Scroll through the menus (SetP, Lit¯, Lit_, Unit) from the temperature display (1) with the SCROLL UP (3) and

SCROLL DOWN (4) buttons.

 Select a menu with the SET button (5).  Enter the password. After pressing the SET button (5) press the SCROLL UP (3) and SCROLL DOWN (4)

buttons within two seconds; see Password button combination figure.

 Always adjust the desired value with the SCROLL UP (3) and SCROLL DOWN (4) buttons.  Confirm the value with the SET button (5).  When the BACK button (2) is pressed, the value is not saved.  Select a different menu by scrolling with the SCROLL UP (3) and SCROLL DOWN (4) buttons.  If there is no input for 30 seconds, a TIMEOUT is initiated and the LCD switches to temperature display.



Menu is adjusted in the cooling unit.

1 2 34 5

Password

< 2s < 2s

5

3

4

Figure 17 - Control panel (MC)

Figure 18 - Password button combination (MC)

6

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Menu settings

Setpoint menu

Temperature

display

Error

1s

Start-up mode

Energy mode Stop mode

Error number

Actual

Status

Error

Display

Input mode

1s

Value +1 Value -1

Save

parameter

Do not save

parameter

Display

Input mode

1s

Value +1 Value -1

Save

parameter

Do not save

parameter

Display

Input mode

1s

Save

parameter

Do not save

parameter

Value +1

Value -1

Password menu *

Menu

Limit value

Temperature

too high

Menu

Limit value

Temperature

too low

30 seconds without input Back to the temperature display

Password menu *

Status

Actual

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Menu settings

4.4 Operation of the cooling unit

• After connection of the mains voltage, the device switches to startup/test mode or directly to operating mode. The controller equipment determines which mode is activated.

• In operating mode the cooling unit switches to cooling mode as needed. This takes place depending on whether a temperature switching threshold (TSet) is reached or undercut.

 Cooling mode switches off when the temperature switching threshold (TSet) is undercut. It continues running if

the temperature switching threshold (TSet) has not been reached yet.

 The evaporator fan (internal), condenser fan (external) and compressor switch off when the door is opened.

NOTE

Condensate flowing back into the switch cabinet can damage the electronic components

Internal temperatures below the dewpoint or damaged switch cabinet seals cause excessive accumulation of condensate.

 Regular inspection of the seals assures protection against heavy condensate accumulation.

 Ensure that the accumulating condensate can drain freely.

Unit menu

Temperature

display

Error

1s

1s Start-up mode

Energy mode Stop mode

Error number

Actual

Status

Error

Display

Input mode

Value °F Value °C

Save

parameter

Do not save

parameter

Password menu *

30 seconds without input Back to the temperature display

Status

Actual

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Operating conditions

• The mains voltage must lie within the specified range; see Electrical data.

 A deviation of ± 10 % is permissible.

• The rated frequency must be within ± 3 Hz of the value specified.

• The ambient temperature must be below 55 °C. For further options, see Technical data.

 The cooling unit must only be used in such a manner as to ensure that the specified cooling capacity is able to

meet actual demands.

 Only the specified coolant may be used.

NOTE

Spare parts from third-party manufacturers can damage the unit

Internal temperatures below the dewpoint or damaged switch cabinet seals cause excessive accumulation of condensate.

 Only use specially harmonized manufacturer parts for safe and reliable operation.

 For Pfannenberg spare part numbers, see Spare part orders.

4.5 Service interface

• The service interface (1) can be used to change operating parameters.

• For this purpose, a USB adapter (2) and the ECoolPLANT 2.X configuration software and USB driver software

are required.

• The connection for the USB adapter is marked on the electrical circuit diagram with the identifier X28.

• The USB adapter enables connection to a computer that works with the ECoolPLANT 2.X configuration

software. The detailed use is described in the corresponding operating manual for the ECoolPLANT 2.X software.

• Remove the USB adapter (2) from the unit after use. The service interface (1) is only provided for temporary data exchange in order to read system notifications, etc. Continuous operation is prohibited.

 The USB adapter is available as an accessory, see Spare part orders.  The ECoolPLANT software (3) is available for download free of charge on the website:

https://www.pfannenberg.com/ QR-Code (3).

 The corresponding operating manual for the ECoolPLANT software is available HERE and from My

Pfannenberg.

2 1 3

Figure 19 - Service

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4.6 Error messages

The error numbers are not displayed for units with standard controllers: With the ECoolPLANT software error numbers can be read on the computer.  The blinking of the red LED light on the controller circuit board is not a fault indicator or error message. The red

LED light indicates that voltage is supplied to the cooling unit.

Error

no.

Fault

Unit activity

Possible causes

Corrective measures

Er00

•

LED:

•

Compressor:

•

Evaporator fan (internal):

• Condenser fan (external):

•

Heater (external):

• Fault signal contact:

Blinking OFF

OFF

OFF OFF Closed

 Door contact:  The door contact loop has

been interrupted.

 Close door.  Connect door contact

switch.

 Bypass door contact.  Check wiring.

Er01 • LED:

•

Compressor:

•

Evaporator fan (internal):

• Condenser fan (external):

•

Heater (external): Fault signal contact:

Blinking OFF

ON

ON OFF Open

 Pressostat tripped:  Excessively high pressure

has built up in the refrigerant circuit. The cooling unit cannot dissipate the heat from the refrigerant circuit.

 Allow the unit to cool

down.

 Clean the heat

exchanger fins (internal/external).

 Check condenser fan

(external) for function.

Er04 • LED:

•

Compressor:

•

Evaporator fan (internal):

• Condenser fan (external):

•

Heater (external): Fault signal contact:

Blinking OFF

OFF

OFF OFF Open

 Phase sequence / phase

loss:

 Failure of at least one

phase or phase sequence is incorrect (only with alternating current units with rotating piston compressors).

 Check the field of

rotation - (clockwise rotation is required).

 All phases must carry

rated operational voltage.

Er05 • LED:

•

Compressor:

•

Evaporator fan (internal):

• Condenser fan (external):

•

External heating: Fault signal contact:

Blinking ON

ON

ON OFF Open

 Sensor 1 (TS1) defective.

 Replace Sensor 1 or the

controller circuit board according to the unit type.

 Replace controller circuit

board if the sensor is soldered in place.

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Error messages

Error

no.

Fault

Unit activity

Possible causes

Corrective measures

Er06

• LED:

• Compressor:

• Evaporator fan

(internal):

• Condenser fan (external):

• Heater (external):

• Fault signal contact:

Blinking OFF

ON

ON OFF Open

 Sensor 1 Minimum:  Minimum switch cabinet

temperature value "Lit_" (LCD) is reached or exceeded.

 Select higher switch

cabinet temperature setpoint.

 Inspect the switch

cabinet for leaks.

 Move components near

the air inlet and outlet further away in order to prevent an air short circuit. (Cold air is diverted directly to the air inlet by components.)

Er07

• LED:

• Compressor:

• Evaporator fan

(internal):

• Condenser fan (external):

• Heater (external):

• Fault signal contact:

Blinking ON

ON

ON OFF Open

 Sensor 1 Maximum:  The maximum value of the

switch cabinet temperature "Lit¯" (LCD) has been reached or exceeded.

 The cooling unit cannot

sufficiently cool the air in the switch cabinet.

 Check the settings of the

cooling unit.

 Clean the heat

exchanger fins (internal/external).

 Check evaporator fan

(internally) for functionality.

 Check the refrigeration

circuit for escaping refrigerant or leaks.

 If necessary, install a

cooling unit with a higher cooling capacity.

Er08

• LED:

• Compressor:

• Evaporator fan

(internal):

• Condenser fan (external):

• Heater (external):

• Fault signal contact:

Blinking ON

ON

ON OFF Open

 Sensor 2 (TS2) defective.

 Replace Sensor 2 or the

controller circuit board according to the unit type.

 Sensor 2 is plugged into

the circuit board, not permanently soldered in place.

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Error messages

Error

no.

Fault

Unit activity

Possible causes

Corrective measures

Er15

• LED:

• Compressor:

• Evaporator fan

(internal):

• Condenser fan (external):

• Heater (external):

• Fault signal contact:

Blinking OFF

OFF

OFF OFF Open

 Anti-freeze (optional):  Anti-freeze sensor ≤ 1°C.  Safety shut-off, because

there is a risk of icing of the compressor.

 Restart after

accumulating condensate water has evaporated.

 A restart is only possible

with disconnection and re-connection of the mains voltage.

 For safety reasons, there

is no other means of resetting.

 Clean the heat

exchanger fins (internal/external). Inspect the switch cabinet for leaks.

 Select higher switch

cabinet temperature setpoint.

 Check function of the

evaporator fan (internal).

Er19

• LED:

• Compressor:

• Evaporator fan

(internal):

• Condenser fan (external):

• Heater (external):

• Fault signal contact:

Blinking OFF

OFF

OFF OFF Open

 Sensor 5 (TS5) defective

 Replace Sensor 5 or the

controller circuit board according to the unit type.

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4.7 LCD error messages

Error no.

Control panel

Unit activity

System information

• LED:

• Compressor:

• Evaporator fan

(internal):

• Condenser fan (external):

• Heater (external):

• Fault signal contact:

Illuminated OFF

OFF

OFF OFF Closed

Energy saving mode:

- Energy function execution, activated in energy saving mode.

- For detailed information about energy saving mode, see Energy-saving mode.

• LED:

• Compressor:

• Evaporator fan

(internal):

• Condenser fan (external):

• Heater (external): Fault signal contact:

Illuminated OFF

OFF

OFF OFF Closed

Start-up mode

- The cooling unit starts its operation

• LED:

• Compressor:

• Evaporator fan

(internal):

• Condenser fan (external):

• Heater (external): Fault signal contact:

Illuminated OFF

OFF

OFF OFF Closed

Stop mode execution. The unit was stopped due to:

- Opening of the switch cabinet door.

- The cooling unit received a stop command,

- e.g. via the software application.

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5 Service and Maintenance

5.1. General cleaning

DANGER

Life-threatening danger due to electric shock

Live units and exposed connection cables can generate an electric shock and cause severe accidents.

 Work on electrical connections must be carried out exclusively by trained, qualified electricians.

 Before working on the unit, de-energize all supply lines to the separate fuse or a main switch, disconnect

the system and secure to prevent re-connection.

 Test to ensure the absence of voltage on the unit.

WARNING

Danger of accidents due to component damage during cleaning

Cleaning of cooling units with water jet, steam jet, high-pressure washer or sharp objects can damage the electrical and electronic assemblies. Malfunctions can cause accidents.

 Do not clean with a water jet, pressure washer or flammable cleaning agents.

 Protect electrical components from the penetration of moisture.

 Do not use pointed or sharp-edged objects to clean the fins. They must not be pinched or damaged.

CAUTION

Danger of crushing during removal of the unit cover

Hands and other body parts can be crushed during removal and re-installation of the unit cover.

 Keep body parts out of the space between the frame, springs and unit cut-out.

 Work carefully and wear gloves.

The frequency of cleaning intervals depends on the operating conditions in the individual case. The following cleaning work must take place regularly for safe and reliable operation of the cooling units:

 Remove dust or environmental residue from the heat exchangers.  Check the condensate drain regularly.

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5.2 Cleaning the cooling unit - Unit cover removal

Item

Designation

Item

Designation

Item

Designation

1

Fastening screws

2

Tilting angle 20°

3

Display or operating unit

4

Bottom plate slot

5

Unit cover

Requirement

- The cooling unit is de-energized

Procedure

 Remove the fastening screws (1).  Tilt the unit cover (5) forward 20° (2).  Disconnect the earthing cable and connecting cables from the display or operating unit (inside) (3).  Raise the unit cover about 15 mm and pull it out of the slots in the bottom plate (4).



The unit cover is removed.

Figure 20 – Unit cover removal

1

2

3

4

5

1

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5.3 Cooling unit and filter mat cleaning tasks

NOTE

Danger of damage to the filter mat due to improper cleaning

 Do not wring out the filter mat.

 Avoid water jets with high pressure.

 Immediately replace filter mats that are contaminated with oil or grease.

Requirements

- The cooling unit is de-energized.

- The unit cover is removed.

 Time intervals for the cleaning or replacement of filter mats depend heavily on the ambient air contamination.

Required tools and material

- Brush

- Water below 40 °C

- Mild detergent

- Vacuum or compressed air cleaner

Procedure

 Clean the heat exchangers using a soft brush or compressed air.  If the cooling units have a pre-filter, the filter mat must be cleaned at regular intervals.  Wash the filter mat with water at a temperature of up to 40 °C and commercially available mild detergent.  If the dirt is dry, vacuum, blow or knock the dirt off of the filter mat.  Ensure that correct and safe operation is assured after cleaning.



The cooling unit is clean.

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5.4 Maintenance

DANGER

Life-threatening danger due to electric shock

Live units and exposed connection cables can generate an electric shock and cause severe accidents.

 Opening, troubleshooting and replacement of components on the unit must only be carried out by qualified

personnel.

 Always ensure that the unit is de-energized before working on the unit.

WARNING

Danger due to improper maintenance work

Damage of components and faulty replacement of components can cause accidents.

 Always switch off the disconnector/contactor before beginning maintenance work.

 Ensure that the fans are in idle position and are no longer rotating.

 After replacement of defective parts or components, inspect the unit for correct and safe operation.

 After all maintenance or replacement of spare parts, check to ensure the full capability of the condensate

drain.

WARNING

Spare parts from third-party manufacturers can damage the unit and cause accidents.

 Only original parts are subject to the manufacturer's quality control.

 Only use specially agreed manufacturer parts for safe and reliable operation.

NOTE

Danger of unit damage due to incorrectly performed maintenance

Disregard of the recommended maintenance work reduces the cooling capacity of the cooling unit and could result in reduced machine availability.

 Maintenance work must be carried out regularly, as specified in the maintenance checklist.

 Warranty claims are only valid for units that have been maintained according to specifications.

The refrigerant circuit is a maintenance-free, hermetically sealed system. The following preparations are made at the factory:

 Necessary refrigerant quantities are filled.  All cooling units are tested for leakage in the factory in accordance with DGUV-R 100-500, 2.35 (operation of

refrigeration plants, heat pumps and cooling equipment).

 A functional test run was carried out.

Pfannenberg recommendation to the operator for maintenance work:  Carry out maintenance work regularly, every 12 months, according to the maintenance checklist; see

Maintenance checklist template.

 Shorter maintenance intervals are required for cooling units that cool in oil- and dust-laden ambient air. A

reduced guideline value of two to six months between maintenance intervals applies.

 The functions of Pfannenberg filters are optimally matched to the cooling units. Therefore, use of Pfannenberg

filters has a positive effect on the scope of maintenance work.

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5.5 Maintenance checklist template

Cooling unit maintenance checklist

Maintenance interval: Conduct maintenance every twelve months.

Conduct maintenance every two to six months in oil- and dust-laden environmental air.

Type: Serial number: Date of maintenance: Technician carrying out the work (name):

Unit range designation/ Required maintenance tasks

Visual inspection

To Do

Result 1

Aggregate before maintenance

1.1

General visual inspection of the aggregate

1.2

Inspection for corrosion damage

2 Cooling circuit

2.1

Inspect refrigerant-carrying parts for traces of oil

2.2

Inspect refrigerant-carrying parts for leak tightness

2.3

Inspect electrical connections for damage

2.4

Inspect evaporator for ice formation

3 Condenser / heat exchanger

3.1

Inspect pipe package for deposits

3.2

Inspection for general corrosion damage

3.3

Inspect, clean, align fins*

4

Evaporator / heat exchanger

4.1

Inspect pipe package for deposits

4.2

Inspection for general corrosion damage

4.3

Inspect, clean, align fins*

5 Condenser fan (external)

5.1

Inspect mount for loose parts

5.2

Inspect the electrical connection for damage

5.3

Check motor bearings for noises

5.4

Check the drive for signs of overheating

5.5

Clean fans*

6

Evaporator fan (internal)

6.1

Inspect mount for loose parts

6.2

Inspect the electrical connection for damage

6.3

Check motor bearings for noises

6.4

Check the drive for signs of overheating

6.5

Clean fans*

7 Pre-filter

7.1

Replace filter mat*

7.2

Clean filter mat*

* Maintenance intervals are more frequent, depending on the degree of contamination.

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5.6 Decommissioning

WARNING

Danger of injury due to materials and substances

Improper work on the unit or opening of the refrigerant circuit can be damaging to health.

 Always ensure that the unit is de-energized before working on the unit.

 The unit must only be disposed of by qualified personnel and in accordance with applicable environmental

regulations.

If the cooling unit is no longer needed for a longer period, it must be disconnected from the voltage supply.  Ensure that improper start-up by third parties is not possible.

Final decommissioning

CAUTION

Danger of crushing during the decommissioning of units

Hands and other body parts can be crushed during removal of units.

 Keep body parts out of the space between the frame, springs and unit cut-out.

If cooling units are to be definitively decommissioned or disposed of, the following must be observed:

 Applicable statutory regulations of the user country and environmental protection regulations must be observed.  Refrigerant must be professionally extracted from the refrigerant system. Avoid refrigerant emissions.  The cooling unit must only be disposed of by authorized, qualified personnel.

 Waste equipment must also be disposed of correctly by Pfannenberg. Freight charges for delivery to one of our

manufacturing facilities must be pre-paid.

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6 Troubleshooting

Fault

Possible causes

Corrective measures

Unit does not cool;

Evaporator fan (internal) running

• Temperature setting too high.

 Check the temperature setting.

Unit does not cool sufficiently

• Operating limits exceeded.

 Check the ambient temperature and internal

load.

• Too little coolant.

 Call in authorized qualified personnel; check

the unit for leakage.

• Heat exchanger dirty.

 Clean the heat exchanger.

•

Evaporator fan (internal) defective.

• Condenser fan (external) defective.

 Call in authorized, qualified personnel;

replace fan.

• Disruption in the air circulation inside the cabinet.

 Check the installation and the path of air

circulating in the switch cabinet.

 Check the supply and outlet flow of air of

the cooling unit to the inlet and outlet opening of the switch cabinet.

Unit cools only periodically

• Temperature set incorrectly or unit is defective.

 Set the a higher temperature.  Call in authorized qualified personnel, check

the unit.

Condensate accumulates in the switch cabinet

• Exhaust temperature is too low.

 Close the cabinet door.

• Switch cabinet is not sufficiently sealed.

 Correct leaky points or seals on the switch

cabinet.

 Check the temperature setting.

Condensate does not drain

• Condensate drain is plugged up.

 Clean the condensate drain.  Check whether the condensate drain hose

is free from kinks and is installed with a downward slope.

Condensate drains from the unit

• Condensate evaporator is defective or too much condensate accumulates.

 Replace fuses for the condensate

evaporator.

• Switch cabinet is not sufficiently sealed.

 Correct leaky points or seals on the switch

cabinet.

 The blinking of the red LED light on the controller circuit board is not a fault indicator or error message. The red

LED lamp indicates that voltage is supplied to the cooling unit.

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7 Spare part orders / accessory orders

No.

Designation

No.

Designation

18811100065

Evaporator fan (internal)

18811100065

Condenser fan (external)

18810200144

Unit cover DTI 62/6301C RAL

18810200145

Unit cover DTS 62/6301C RAL

18810000058

Multi-Controller (MC) control panel

18810000001

Standard controller (SC) display unit

18314000100

Condensate collecting bottle

18310000004

USB adapter

18310000151

Filter adapter

18300000147

Fleece filter

18300000148

Fluted filter

18300000149

Metal filter

 Always specify the Pfannenberg part numbers when ordering spare parts and accessory parts.  The Pfannenberg part numbers for the controller are provided on the transformer of the controller.

8 Terms of warranty

The warranty does not apply or is voided in the following cases:

 Improper use of the unit.  Failure to observe operating conditions or disregard of the operating manual.  Lack of regular maintenance on the cooling units.  Damage due to disregard of maintenance recommendations.  Damage to cooling units due to soiled or clogged filters.  Damage due to unauthorized opening of the refrigerant circuit.  Modifications carried out on the unit or a change to the serial number.  In the event of damage during transport or other accidents.  Replacement of parts by unauthorized personnel.

 Only original Pfannenberg parts are permitted for use. Violations void the warranty.

For recognition of warranty claims and return of the unit, observe the following:  Provide an exact description of the defect and the SRO (RMA) numbers specified by Pfannenberg with the

cooling unit.

 Include a reference document (delivery note or invoice copy).  Forward the cooling unit to us, complete with all accessories, in the original box or in comparable packaging

with freight and transport insurance pre-paid.

Observe transport instructions; see Transport.

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Liability disclaimer: All information contained was thoroughly checked in May 2017. However, we make no guarantee as to the completeness and correctness of the specifications.

Legal notice: Pfannenberg GmbH Werner-Witt-Straße 1 21035 Hamburg Tel. +49 40 734 12-0 www.pfannenberg.com

Operating Manual

Attachment and installation cooling units DTS and DTI Series 6201C / 6301C Multi-Controller (MC) – 400 V 2~

Version 1.0, May 2017

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Preface

The skills and information provided in the ORIGINAL OPERATING MANUAL are required for assembly and safe operation of Pfannenberg cooling units. The information is presented in a brief, clearly arranged format. The chapters are numbered throughout. If you have the operating manual in digital format, the links are interactive. Various unit types are documented in this operating manual. Pfannenberg cooling units are subject to continuous improvement. Please understand that we must reserve the right to changes in design, equipment and technology. For this reason, no claims to specific features of the unit can be derived from the content of this operating manual.

 A film on the DTI cooling units can be viewed HERE.

Safety instructions and markings

DANGER

Identifies an exceptionally dangerous situation. Severe, irreversible injuries or death will occur if this notice is not observed.

DANGER

Identifies an exceptionally dangerous situation in connection with electrical voltage. Severe, irreversible injuries or death will occur if this notice is not observed.

WARNING

Identifies an exceptionally dangerous situation. Severe, irreversible or deadly injuries could occur if this notice is not observed.

CAUTION

Identifies a dangerous situation. Minor or moderate injuries could occur if this notice is not observed.

 Before notices and explanations.

* Legend notice



Placed before results of actions.

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