Dantherm 3000 User manual

081488•Version 1.0 17.09.2013

DC Air Conditioner 3000

Service manual

Rev. 1.0

Der tages forbehold for trykfejl og ændringer

Dantherm can accept no responsibility for possible errors and changes

Irrtümer und Änderungen vorbehalten

Dantherm n’assume aucune responsabilité pour erreurs et modifications éventuelles

081488•Version 1.0 17.09.2013

Introduction

Overview

Introduction

This is the service manual for the Dantherm DC Air Conditioner 3000.

Please see the below table of content for further information about the sections.

Manual

Part number of this service manual is 366245 and covers units with serial numbers from

1306121273752

Target group

The target group for this service manual are the technicians who install and maintain

the DC Air Conditioner 3000 unit, as well as the users of the unit.

Copying of this service manual, or part of it, is forbidden without prior written permis-

sion from Dantherm Air Handling A/S.

Reservations

Dantherm reserves the right to make changes and improvements to the product and the

service manual at any time without prior notice or obligation.

Table of contents

This service manual covers the following main topics:

Introduction................................................................................................................3

Product description.....................................................................................................4

Overall description...............................................................................................4

Electronic control description ...............................................................................8

Connections.......................................................................................................11

Installation - outdoor.........................................................................................12

Installation –through wall ..................................................................................15

Service guide ............................................................................................................16

Preventive maintenance......................................................................................17

Troubleshooting ................................................................................................19

Electrical schematic............................................................................................21

Cooling circuit ...................................................................................................22

Spare part list ....................................................................................................24

Replacing parts ..................................................................................................25

Technical data ...................................................................................................28

Contact Dantherm..............................................................................................31

Product description

Overall description

Introduction

This section describes the overall product, and its functionality

Usage of the

DC Air Conditioner

3000

DC Air Conditioner 3000 is designed to control the internal temperature of an outdoor

enclosure. DC Air Conditioner 3000 removes dissipated heat from electronic equipment

and it´s designed to maintain correct temperature for electronic equipment.

Important

Dantherm Air Handling recommends that the cooling system should be running contin-

uously!

Section content

Product description.....................................................................................................4

Overall description...............................................................................................4

Electronic control description...............................................................................8

Connections ...................................................................................................... 11

Installation - outdoor......................................................................................... 12

Installation –through wall.................................................................................. 15

081488•Version 1.0 17.09.2013

Overall description, continued

Outdoor view

This illustrates the unit outdoor visible parts

Fig. 1

Parts description

outdoor view

This tables shows outdoor parts according to Fig. 1

Part

Function

Mounting frame

Lifting handles

Condenser air output

Condenser air input

Condensed water spigot

Continued overleaf

Overall description, continued

Indoor view

This illustrates the unit indoor visible parts

Fig. 2

Parts description

indoor view

This tables shows indoor parts according Fig. 2

Part

Function

Evaporator air inlet

Controller

Service entrance

Evaporator fan blowing cold air out

Serial number label

Continued overleaf

081488•Version 1.0 17.09.2013

Overall description, continued

Functionality

The illustration and table below show the airflows of DC Air Conditioner 3000.

The two air flows (internal/external) operate separately. External air is only used to cool

down the condenser which dissipates the heat absorbed by the indoor evaporator.

The air flows are not mixed

Fig. 3

Internal air flow

Warm, internal air is drawn into the unit by the internal evaporator fan, at the evapora-

tor opening, through the evaporator and the evaporator fan, and then released into the

enclosure through the evaporator fan opening.

External air flow

Cold, external air is drawn into the unit by the condenser fan, and routed through the

condenser, where it’s cooling down the condenser. After passing through the condenser

the air is returned to the external environment through the condenser fan.

Electronic control description

Introduction

This section describes key features of the electronic control, and how it operates.

WARNING

Never carry out any installation, maintenance or service, without disconnecting the DC

power supply, by means of the external power supply disconnecting devices.

Installation

requirements

Please incorporate the following when installing the electrical connections:

1. Any external supply should be protected, with an external disconnecting device

2. These disconnecting device, needs to be labelled, with rated voltage as well as

rated current

3. All cables, in a permanent installation, are imperative to install and secure

properly, to prevent any damage to equipment and/or humans.

Secure all cables with cable ties or appropriate cable fasteners, made for this

purpose.

Controller

Embedded controller

Controller

Functionallity

The control board controls fans and cooling compressor according to the temperature

in return air flow. The cooling capacity is automatically adjusted to match the present

heat dissipation from the affiliated applications, so the airconditioner always uses min-

imum energy according to heat load.

Phase

Description

When power is on, the evaporator fan will circulate the indoor air repeatedly

on idle speed.

When return air temperature reaches the predefined set point, internal fan

will speed up, the compressor will start on minimum rotation speed. In case

temperature keeps rising the compressor rotation speed will increase until a

balanced condition between the applied heat dissipation and cooling perfor-

mance has been obtained.

Temperature set point can adjusted in 5 fixed levels; 20℃-25℃-30℃-35℃-

40℃

If return air temperature drops below the hysteresis (set point –hysteresis),

the compressor will be stopped, the evaporator fan (internal fan) will keep

circulating internal air on idle speed, to prevent build-up of local hot spots.

Condenser fan speed is controlled according to condenser temperature to

keep acoustic noise level as low as possible.

Compressor has restart delay to protect the compressor against excessive

on/off cycling. Pre-set to 5 minutes.

Operating parameters can be adjusted to comply with specific operating conditions.

Continued overleaf

081488•Version 1.0 17.09.2013

Electronic control description, continued

Alarms

The controller has one hardware alarm output.

Alarm output is a bi-directional dry contact. Max load 60V/50mA. Contact is closed on

failure.

Two LED’s indicates status of operation.

LED indication

Color

STATUS

Definition

Green

Power supply OK

Off

No power or Voltage out of range

Flashing

Selftest on-going. See more at page 10

Red

Off

Normal operation

1 flash

Internal fan failure

3 flash

External fan failure

5 flash

Compressor failure

7 flash

Return air sensor failure

8 flash

Condenser sensor failure

9 flash

Compressor drive communication failure

10 flash

Low supply voltage

11 flash

High supply voltage

13 flash

HP/LP failure

15 flash

High temperature alarm

Data connection

Communication is possible between computer and the 9 pin D-SUB female.

Function

Illustration

TXD- (Z)

TXD+ (Y)

RXD+ (A)

RXD- (B)

For service and test purpose, the communication line can be switched to terminal mode.

Can be used with PC and PuTTY terminal program, for change of operational settings

and monitoring during service.

Terminal use and adjustable parameters, described in separate document.

Continued overleaf

12345

6789

Electronic control description, continued

Data communication

The controller has an RS 485 communication line with an embedded ModBus protocol.

This interface has galvanic insulation.

Communication settings:

RS 485 specification

Baud rate

9600 baud

Bit

8 bit

Stop bit

1 bit

Parity

Non

Cooling setpoint

Cooling set point can be set between 20-40 °C in steps

of 5°C. with the set point dial on the front of the unit.

Reset and boot

By pressing the reset button for five seconds, the controller enters a reboot and test

phase

Step

Description

Eva.fan

Con.fan

Heater

Alarm

Comp.

Duration

OFF

Off

10s

Int.fan

(full speed)

Off

30s

Ext.fan

(full speed)

Off

30s

Heater

(full speed)

Off

10s

Alarm

(full speed)

Off

10s

Compressor

(full speed)

Off

45s

A duration of 2 minutes and 15 seconds in total.

Table of contents

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