Dantherm CDT 30S MKII User manual

CDT 30S /40S MKII
Service manual
Rev. 1.6

2
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

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Introduction
Overview
Dehumidifiers
This manual concerns Dantherm transportable dehumidifier type:
CDT 30S MK II item number 351190
CDT 40S MK II item number 351192
Warning
Please ensure you read this service manual, and use the correct operating and mainte-
nance procedures.
Read the entire manual before using the dehumidifier. Awareness of the correct operat-
ing procedure for the machine and its safety devices is important, to avoid damage or
injury.
Target group
This manual is intended for users and technicians performing preventive maintenance
and repairs.
Copyright
Copying all or parts of the manual is forbidden without the written consent of Dan-
therm.
Provisos
Dantherm reserves the right to make changes and improvements to the product and in
the service manual at any time, without prior notification or obligation.
Contents
This manual contains the following sections:
Introduction................................................................................................................1
Overview..............................................................................................................1
Setup and user guide ..................................................................................................2
Product and function descriptions ........................................................................2
Preparation and transportation guide ...................................................................5
User guide ...........................................................................................................8
Accessories........................................................................................................14
Service guide ............................................................................................................15
Overview............................................................................................................15
Preventive maintenance......................................................................................16
Troubleshooting ................................................................................................18
Technical data ...................................................................................................19
Dimensions........................................................................................................20
Disposal ............................................................................................................21
Wiring diagram ..................................................................................................22
Spare parts ........................................................................................................23
Index .................................................................................................................26

2
Setup and user guide
Product and function descriptions
Introduction
This section provides a product description of the CDT 30S/40SMKII, plus a description
of its functionality.
How it works
Air flow through the dehumidifier:
How the air changes as it passes
through the dehumidifier:
The fan draws humid air through a fil-
ter inside the dehumidifier.

The air is cooled, causing the moisture
content to condense into drops of wa-
ter, which are collected in the water
container.

The air is reheated using heat from the
dehumidifier's operation (temperature
increase of approx. +5 °C), and the
option of further heating using the in-
tegrated heating element.
As the air is repeatedly circulated through the dehumidifier, its moisture content is re-
peatedly reduced, resulting in rapid, gentle drying. The dehumidifier can run constantly,
or be controlled by a built-in hygrostat.
Illustration
Illustration of dehumidifier:
Rear view
Front view
Continued on next page
Handle
Air intake with PPI filter
behind grille
Air exhaust
Control panel
Type plate behind water container
Water container
Wheel
Power cord
Data socket
remote monitoring

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Product and function descriptions, cont.
Ducting connections
With two hoses (2 x 100 mm dia.) on the exhaust, dry, hot air can be passed under a
surface such as a floor.
Dantherm recommends connection of max. 5 metres of flexible ducting per connection
spigot.
Heating element
CDT 30S/40S has one 1 kW integrated heating element. When the element is active, the
dehumidification process is accelerated. See page 8 of the user guide for heating ele-
ment operation.
Water container
Condensate water is collected in the water container or it can be piped to a drain via a
hose spigot (optional accessory).
The dehumidifier cuts out automatically when the container is full. See the user guide
for emptying the water container. The dehumidifier cannot operate when the container
is removed.
Continued on next page

4
Product and function descriptions, cont.
Control panel
Illustration of control panel:
Functions
Main functions:
Manual or auto (built-in adjustable hygrostat).
External hygrostat socket.
Display of temperature, relative air humidity, hours and kWh consumption.
Hour counter and kWh consumed without 230V connection.
Adjustable service interval counter.
Supply of extra heat for higher dehumidification efficiency.
Targeted dehumidification, e.g. between floor decks.
Operation described in the user guide in this manual.
Cooling circuit
diagram
CDT 30S MK II
CDT 40S MK II
Pos.
Description
Pos.
Description
1
Compressor
5
Capillary tube (CDT 30S only)
2
Condenser
6
Evaporator
3
Fan
7
Solenoid
4
Dry filter
8
Thermostatic expansion valve
(not CDT30S)
Main switch
Function keys
Status indicators
Display

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Preparation and transportation guide
Introduction
This section is a guide to unpacking, preparation, transport and storage
Warning
If the machine has been transported lying down, allow it to stand upright for at least 1
hour before use.
Unpacking
Follow these steps for unpacking:
Step
Action
Illustration
1
Open the top of the pack-
aging
2
Position the box vertically,
with the wheels at the bot-
tom
3
Extract the machine from
the box
4
Loosen the knobs, pull the
handle up to the desired
height and retighten the
knobs
5
Remove the protective foil on the control panel
Continued on next page

6
Preparation and transportation guide, cont.
Position
Position the dehumidifier where there is plenty of air circulation around it, with mini-
mum 60 cm of clearance on the air intake side, and 3 meters of clearance on the ex-
haust side if no flexible ducts are attached.
Optimum operation
Ensure the room to be dehumidified is sealed, and that the machine is not located near
a heat source, such as radiators.
If flexible ducts are attached, performance will be significantly impaired if they exceed 5
metres in length.
Electrical connection
The machine comes complete with a 3.5m power cord, and can be connected to any 230
V, 50 Hz socket with a 10-16A fuse.
Stairs
The wheels are positioned such that the machine can be pulled upstairs without damage
to the cabinet or stairs.
Transporting or
moving the dehu-
midifier
The machine can be moved by two people or using a crane. See the instructions below:
Be aware of any local safety regulations with regard to lifting!
2 people
Hoist/crane
Lifting using a cargo strap
Continued on next page

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Preparation and transportation guide, cont.
Storage
Do not stack more than 2 high.
Step
Illustration
Push handle down.
Stack units.
Check that the upper set of wheels are
placed correctly on the handle below.

8
User guide
Introduction
All functions are controlled from the integrated control panel.
The user guide contains the following sections:
Introduction................................................................................................................8
Switching on/off and operating status.........................................................................8
Operating the heating element....................................................................................8
Internal hygrostat operation........................................................................................9
External hygrostat operation .......................................................................................9
Hour counter ..............................................................................................................9
Display texts.............................................................................................................10
Text displays when not connected to mains ..............................................................10
Replacing the memory battery...................................................................................11
Error messages .........................................................................................................12
Emptying the water container....................................................................................13
Switching on/off
and operating status
The table below shows operation of the on/off function and display texts.
Key
Display
ON –constant
INT HYG ON –operation controlled by internal hygrostat
INT HYG STOP, if internal hygrostat set point is reached
EXT HYG ON –operation controlled by external hygrostat
EXT HYG STOP, if external hygrostat set point is reached
Switch off
The green LED indicates active dehumidification
Operating the heat-
ing element
The integrated 1 kW heating element is activated by setting the
switch behind the water container to setting 1. Switch to O to de-
activate.
Continued on next page
Switch behind water container

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User guide, cont.
Internal hygrostat
operation
The table below shows operation of the hygrostat functions and display texts.
Step
Key
Feedback
Press
and
hold
HYG SET RHxxx% - will flash for 5 seconds. The dehumidifier will
then switch to internal hygrostat-controlled operation with set point
(once the set point is reached, the display will show INT HYG STOP)
Press +/-briefly to set the RH% value in during the above 5 second
period. The new value will be saved after a further 5 second period
after the last key is pressed
Press
HYG OFF - will flash for 5 seconds. The dehumidifier will then switch
to constant
External hygrostat
operation
If an external hygrostat is connected, the machine will automatically switch over to us-
ing it
Any adjustment of the set point must now be made on the external hygrostat. (once the
set point is reached, the display will show EXT HYG STOP)
Hour counter
The built in hour counter logs the total number of operating hours (cannot be reset) and
the number of hours left until the next service, which can be adjusted. The service hour
counter is disabled upon delivery.
Step
Key
Feedback
Press
and
hold
SERVICE xxxxh –shows the number of hours to the next au-
thorised service. This value is saved automatically after 5
seconds of flashing, and the function will activate if not al-
ready activated. When the set number of hours for service in-
tervals has expired, the display will switch to SERVICE
Press +/-briefly to set a new service value. The new value
will be saved 5 seconds after the last key is pressed
Press
SET SERVICE OFF –deactivates the service timer function
Continued on next page

10
User guide, cont.
Display texts
The table below shows how to operate the operating information functions
Key
Feedback
XX°C –shows the current room temperature
Actual RH% - shows the actual relative air humidity value measured
XX kWh - shows total energy consumption. Cannot be reset
xxxxh - shows the total number of operating hours for the machine. Can-
not be reset
Text displays when
not connected to
mains
The machine has a built-in battery to allow reading text displays when not connected to
the mains. The following texts can be read when not connected to the mains:
Key
Feedback
hold down
and
press once
Displays total energy consumption in kWh
hold down
and
press once
Shows total number of operating hours for the dehumidifier
Continued on next page

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User guide, cont.
Replacing the
memory battery
If the hour counters cannot be read when disconnected from mains, it is probably due
to flat memory battery. Replacement procedure:
Action
Warning: Always disconnect from the mains before changing battery
1
Slacken the screws on
both side of the control
panel, and carefully lift
the panel up using the
top edge
2
Cut the cable tie holding the battery. Replace the battery, using a new cable tie
max. 2.5 mm wide.
Use Alkaline AAA batteries only
Illustration of PCB with battery included in the wiring diagram on page 22.
Continued on next page

12
User guide, cont.
Error messages
An overview of possible errors which prevent normal operation
Error message
Illustration
Cause
Remedy
Yellow light on
centre LED with
emptying symbol
and FULL on display
Water container full
See guide below for emptying
Red light on right
warning LED HIGH
TEMP on display
Pressure or tem-
perature in high
pressure element
too high
Check filter and dehumidifier
for dirt in airways
Red light on right
warning LED AMBI-
ENT TEMP on
display
Room temperature
out of normal range
Place the dehumidifier in the
specified temperature range,
between 3°-32°C
Red light on right
warning LED SEN-
SOR FAIL on
display. One of the
internal sensors is
defective. Use the
+/- keys to toggle
between 3 possible
errors
SENSOR FAIL
1: EVAP FAIL
Evaporator
thermometer
defective
Requires an authorised ser-
vice technician
2: COND FAIL
Condenser
thermometer
defective
Requires an authorised ser-
vice technician
3: ROOM FAIL The
internal room
thermometer is
defective
Requires an authorised ser-
vice technician
Red light on right
warning LED LP
STOP on display
Leak in cooling
circuit
Requires an authorised ser-
vice technician
Continued on next page

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User guide, cont.
Emptying the water
container
The dehumidifier does not need to be switched off when emptying the container. The
dehumidifier will switch off automatically when the water container is removed.
Water container emptying procedure:
Step
Action
Illustration
1
Pull the water container halfway out by pulling
the handle on its front
2
Grip the water container side handles, and lift
free of the dehumidifier
3
Empty the water container by tipping the water
out of the spout on the side
4
Replace the water container
Important:
Check that the water container is pushed in as
far as it will go

14
Accessories
Introduction
More details of each accessory can be obtained from Dantherm.
List
To follow is a complete list of accessories for the CDT range, with illustrations, descrip-
tion and item number:
Accessories
Illustration
Description
CDT-type
Item no.
Hygrostat
With a hygrostat connect-
ed, the dehumidifier can
run automatically depend-
ing on actual air humidity
Hygrostats come in two
versions:
Hygrostat with 0.4 m pow-
er cord, jack plug and
bracket
Hygrostat with 3 m power
cord and jack plug
All
All
396242
396241
Valve and hose
thread
Ball valve, brass
hose thread and jubilee
clip
All
396243
Condensed water
pump
If a condensation pump is
used, emptying the water
container is not necessary
CDT
30/30S
075616
CDT
40/40S/60
075617
Wall bracket
The dehumidifier can be
kept clear of the floor if
mounted on the wall
bracket
CDT
30/30S
396247
CDT
40/40S/60
396248
Danish plug with
earth pin
Adapter for continental
plugs with earth
All
396249

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Service guide
Overview
NB
Spare parts after page 23.
Warning
Always disconnect from the mains before servicing the machine!
Contents
This section contains the following:
Overview...................................................................................................................15
Preventive maintenance ............................................................................................16
Troubleshooting .......................................................................................................18
Technical data ..........................................................................................................19
Dimensions ..............................................................................................................20
Disposal ...................................................................................................................21
Wiring diagram .........................................................................................................22
Spare parts ...............................................................................................................23

16
Preventive maintenance
Introduction
Preventive maintenance is necessary to prevent breakdowns.
The recommended monthly and annual maintenance schedule is specified below.
Important
Always disconnect from the mains before starting preventive maintenance on the ma-
chine!
Monthly mainte-
nance
Procedure for monthly maintenance:
Step
Action
1
Open and lift up the front grille
2
Remove the filter and rinse in warm
soapy water, or vacuum clean if only
slightly dirty
If the filter is very dirty, it should be
replaced. See the section on spare
parts
3
Clean the water container
Continued on next page

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Preventive maintenance, cont.
Monthly mainte-
nance, cont.
Step
Action
4
Remove the 2 screws on each side,
and raise the cover about 30°
Lift cover up
6
Clean the evaporator surface with a
soft brush, vacuum cleaner or com-
pressed air
Replace the cover and water container
7
DO NOT reset the units service interval counter when performing monthly
service
Annual or according
to
service counter
When the service interval expires, or at least once annually, deliver the dehumidifier to
an authorized service center.
The machine will be thoroughly serviced and inspected, checked for leaks in the cooling
system and electrical safety.
Dantherm also provides fixed service contacts which cover an 18 point service pro-
gramme. Contact your nearest Dantherm dealer for more details.

18
Troubleshooting
Troubleshooting
Use the table below to localise and correct problems or errors:
Problem
Possible cause
Solution
Dehumidifier will not
start
Display not switched on
Plug not in mains socket
Check dehumidifier is con-
nected to the mains. Check
the mains socket if neces-
sary by connecting another
electrical appliance
Dehumidifier will not
start
Green light not on
HYG STOP shown on
display
The hygrostat has meas-
ured air humidity lower
than the set point, and
switched off to save power
Reduce hygrostat set point,
or switch to manual opera-
tion. See the section on In-
ternal hygrostat operation
page 9
Yellow light on
Display shows Full
Container full or pump (ac-
cessory) blocked
Empty water container or
clear pump blockage
Red light on
Error stopping the machine
See user guide table on
page 12on error messages
Dehumidifier running
Green light on
SERVICE flashing on
display
Service interval set has ex-
pired
Service the product as
specified in the section on
service counter expiry
Dehumidifier running
When RH% activates,
the display shows SEN-
SOR FAIL
RH% sensor defective
Replace RH% sensor
kWh and hours without
power not displayed
Memory battery flat.
Replace battery. See page
11
Note:
If the machine is not working properly, switch off immediately!
Before starting troubleshooting, wait for one minute, as the electronics could have
cut off the machine for safety reasons
Additional help
If the dehumidifier will not restart, contact your Dantherm dealer. This also applies if the
machine runs without condensing any water. There may be a fault on the cooling circuit
which will require a service technician