Trotec PAC 3550 PRO User manual

TRT-BA-PAC3550PRO-TC-001-EN
PAC 3550 PRO
EN
OPERATING MANUAL
LOCAL AIR CONDITIONER

1 EN
Operating manual – local air conditioner PAC 3550 PRO
Table of contents
Notes regarding the operating manual.................................1
Safety .....................................................................................2
Information about the device................................................3
Transport and storage...........................................................5
Assembly and installation.....................................................5
Operation ...............................................................................9
Errors and faults..................................................................13
Maintenance ........................................................................15
Technical annex...................................................................18
Disposal ...............................................................................20
Notes regarding the operating manual
Symbols
Warning of electrical voltage
This symbol indicates dangers to the life and health of
persons due to electrical voltage.
Warning!
This signal word indicates a hazard with an average
risk level which, if not avoided, can result in serious
injury or death.
Caution!
This signal word indicates a hazard with a low risk
level which, if not avoided, can result in minor or
moderate injury.
Note
This signal word indicates important information
(e.g. material damage), but does not indicate hazards.
Info
Information marked with this symbol helps you to carry
out your tasks quickly and safely.
Follow the manual
Information marked with this symbol indicates that the
operating manual must be observed.
The current version of the operating manual can be found at:
PAC 3550 PRO
http://download.trotec.com/?sku=1210002110&id=1
Legal notice
This release replaces all previous versions. No part of this
publication may be reproduced without written permission from
TrotecGmbH&Co.KG. The same applies for electronically
processing, duplicating or spreading the publication. Subject to
technical changes. All rights reserved. Trademarks are used
without guarantee that they may be used freely and primarily
following the spelling of the manufacturer. Product names are
registered.
Changes to construction in the interests of constant
improvements to the product, as well as changes to the shape
and colour are reserved.
The scope of delivery may vary from product images. This
document was created with all due care. TrotecGmbH&Co.KG
accepts no liability whatsoever for possible mistakes or
omissions.
© TrotecGmbH&Co.KG

EN 2
Operating manual – local air conditioner PAC 3550 PRO
Warranty and liability
The device complies with the fundamental health and safety
requirements of the applicable EU regulations and was tested at
the factory for perfect functionality multiple times.
However, if faults in the functionality occur and cannot be
remedied with the measures in the chapter Errors and faults,
please get in touch with your dealer or distributor.
When making a warranty claim, supply the device number (see
the rear of the device).
When manufacturer's instructions or legal regulations have not
been followed, or after unauthorised changes to the device are
made, the manufacturer is not responsible for the resulting
damages. Changes to the device or unauthorised replacement
of individual parts can drastically impact the electrical safety of
this product and will result in the loss of the warranty. Liability
does not extend to damages to people or property caused by the
device being used other than as described in the instructions in
this operating manual. Subject to changes to technical design
and model changes as part of constant development and
product improvement without prior notice.
No liability is accepted for damages resulting from improper
use. In such a case, any warranty claims will be voided also.
Safety
Read this manual carefully before starting or using the
device. Always store the manual in the immediate vicinity
of the device or its site of use!
• Do not use the device in potentially explosive rooms.
• Do not use the device in aggressive atmosphere.
• Set the device up in an upright and stable position.
• Let the device dry out after a wet clean. Do not operate it
when wet.
• Do not use the device with wet or damp hands.
• Do not expose the device to directly squirting water.
• Never insert any objects or limbs into the device.
• Do not cover or transport the device during operation.
• Do not sit on the device.
• This appliance is not a toy! Keep away from children and
animals. Do not leave the device unattended during
operation.
• Check accessories and connection parts for possible
damage prior to every use of the device. Do not use any
defective devices or device parts.
• Ensure that all electric cables outside of the device are
protected from damage (e.g. caused by animals). Never
use the device if electric cables or the power connection
are damaged!
• The electrical connection must correspond to the
specifications in chapter Technical data.
• Insert the mains plug into a properly secured mains
socket.
• Observe the technical data when selecting extensions to
the power cable. Completely unroll the extension cable.
Avoid electrical overload.
• Before carrying out maintenance, care or repair work on
the device, remove the mains plug from the mains socket.
Hold onto the mains plug while doing so.
• Switch the device off and disconnect the power cable from
the mains socket when the device is not in use.
• Do not under any circumstances use the device if you
detect damages on the mains plug or power cable.
Defective power cables pose a serious health risk.
• Observe the storage and operating conditions (see chapter
Technical data).
• Ensure that the air inlet and outlet are not obstructed.
• Ensure that the side of the device where the air inlet is
found is kept free of dirt and loose objects.
• Only transport the device in an upright position with an
emptied condensation tank or drain hose.
• Discharge the collected condensate before transport and
storage. Do not drink it. Health hazard!

3 EN
Operating manual – local air conditioner PAC 3550 PRO
Intended use
Only use the device for cooling, ventilating and dehumidifying
indoor air whilst adhering to the technical data.
Improper use
• Do not place the device on wet or flooded ground.
• Do not place any objects, e.g. clothing, on the device.
• Do not use the device outdoors.
• Any unauthorised modifications, such as alterations or
structural changes to the device, are forbidden.
• Any operation other than as described in this manual is
prohibited. Non-observance renders all claims for liability
and guarantee null and void.
Personnel qualifications
People who use this device must:
• be aware of the dangers that occur when working with
electric devices in damp areas.
• have read and understood the operating manual, especially
the Safety chapter.
Maintenance tasks which require the housing to be opened
must only be carried out by specialist companies for cooling and
air-conditioning or by Trotec.
Residual risks
Warning of electrical voltage
Work on the electrical components must only be
carried out by an authorised specialist company!
Warning of electrical voltage
Before any work on the device, remove the mains plug
from the mains socket!
Hold onto the mains plug while pulling the power cable
out of the mains socket.
Warning!
Dangers can occur at the device when it is used by
untrained people in an unprofessional or improper way!
Observe the personnel qualifications!
Warning!
The device is not a toy and does not belong in the
hands of children.
Warning!
Do not leave the packaging lying around. Children may
use it as a dangerous toy.
Note
Do not operate the device without an inserted air filter!
Without an air filter the inside of the device will be
heavily contaminated, which could reduce the
dehumidification performance and result in damage to
the device.
Behaviour in the event of an emergency
1. In an emergency, disconnect the device from the mains
feed-in: Switch the device off and disconnect the power
cable from the mains socket. Hold onto the mains plug
while doing so.
2. Do not reconnect a defective device to the mains.
Information about the device
Device description
The device serves the purpose of cooling the room air. It further
filters and dehumidifies the air thus creating an agreeable room
climate.
The device uses two separate air hoses for cooling. The supply
air is fed from outside, not from the room. No negative pressure
is built up in the room and no warm air from outside penetrates
into the room. Yet, fresh air is constantly fed to the air
conditioner and distributed over the room by the fan.
Air conditioners with two-hose technology are up to 25% more
efficient.
If required, the device can also be operated with an exhaust air
hose only. In this case, the supply air is fed from the room.
When operated with an exhaust air hose, the device cools the
room air by extracting heat from it. The absorbed warmth is
emitted to the outside via the exhaust air hose, cooled air is fed
to the installation site by means of a fan.
In ventilation mode the device also provides the opportunity of
air circulation without cooling effect.
In dehumidification mode moisture is withdrawn from the air.
The device operates fully automatically and features a variety of
further options. The device can, for instance, be switched on or
off automatically with time delay via the timer function.
Operation of the device is possible either via the control panel at
the device or via the supplied infrared remote control.
The device was designed for universal and flexible application.
Due to its compact dimensions it can be easily transported and
used in all interior spaces.
Accumulating condensate drips from the evaporator onto the hot
condenser, there it evaporates and then is transported to the
outside via the exhaust air hose.

EN 4
Operating manual – local air conditioner PAC 3550 PRO
Device depiction
1
2
3
4
6
8
9
10
12
11
5
7
16
17
14
13
15
No. Designation
1 Air outlet with ventilation flaps
2 Display and buttons
3 Wheels
4 Compartment for remote control
5 Air inlet
6 Connection for supply air hose
7 Connection for exhaust air hose
8 Air inlet, lockable
9 Air inlet control knob
10 Condensate outlet with sealing cap and rubber stopper
11 Remote control
12 Air hose (exhaust air hose and supply air hose)
13 Air filter for air inlet
14 Air filter for air inlet, lockable
15 Flat nozzle, 2x
16 Power cable holder
17 Handle

5 EN
Operating manual – local air conditioner PAC 3550 PRO
Transport and storage
Transport
Before transporting the device, proceed as follows:
• Switch off the device.
• Hold onto the mains plug while pulling the power cable out
of the mains socket.
• Drain the remaining condensate from the device and the
condensation drain hose (see chapter Maintenance).
• To make the device easier to transport, it is fitted with
wheels.
• Do not use the power cable to drag the device.
• Only wheel the device on a level and smooth surface.
After transporting the device, observe the following:
• Set up the device in an upright position after transport.
• Leave the device to rest for 12-24hours, so the
refrigerant can accumulate within the compressor. Wait
12-24hours before switching the device back on! Acting
contrary might lead to compressor damage and a
malfunctioning device. If so, any warranty claims will be
voided.
Storage
Before storing the device, proceed as follows:
• Drain the remaining condensate from the device and the
condensation drain hose (see chapter Maintenance).
• Empty and clean the condensation tank prior to storage.
When the device is not being used, observe the following
storage conditions:
• dry and protected from frost and heat
• in an upright position where it is protected from dust and
direct sunlight
• with a cover to protect it from invasive dust if necessary
• Place no further devices or objects on top of the device to
prevent it from being damaged.
• Remote batteries from the remote control.
Assembly and installation
Scope of delivery
• 1x Device
• 2x Air hose
• 2x Air filter
• 1x Insert for sliding window
• 2x Shade for sliding window
• 1x Remote control
• 2x Hose adapter
• 2x Flat nozzle
• 10x Fastening screw
• 1x Manual
Unpacking the device
1. Open the cardboard box and take the device out.
2. Completely remove the packaging.
3. Fully unwind the power cable. Make sure that the power
cable is not damaged and that you do not damage it during
unwinding.
Start-up
When positioning the device, observe the minimum distance
from walls or other objects as described in the Technical data
chapter.
A
B
C
C
D

EN 6
Operating manual – local air conditioner PAC 3550 PRO
• Before restarting the device, check the condition of the
power cable. If there are doubts as to the sound condition,
contact the customer service.
• Set the device up in an upright and stable position.
• Do not create tripping hazards when laying the power
cable or other electric cables, especially when positioning
the device in the middle of the room. Use cable bridges.
• Make sure that extension cables are completely unrolled.
• Keep air inlets and outlets as well as the connection for the
exhaust air hose and supply air hose free.
• Make sure that no curtains or other objects interfere with
the air flow.
Prior to initial start-up, insert the batteries in the remote control.
Inserting the air filter
Note
Do not operate the device without an inserted air filter!
Without an air filter the inside of the device will be
heavily contaminated, which could reduce the
dehumidification performance and result in damage to
the device.
• Make sure that both air filters are installed before
switching the device on.
Connecting the supply air hose and exhaust air hose
1. Connect the flat nozzle(15) to one end of the air hose(12).
2. Connect the other end of the air hose to the hose adapter.
3. Screw the hose adapter into the air conditioner's connection
for the exhaust air hose or supply air hose(6) in the
direction of the arrow (see figure below).
15
12
6

7 EN
Operating manual – local air conditioner PAC 3550 PRO
4. Check the position of the air inlet control knob(9). It should
be in closed position if the supply air hose is connected. The
venting slots at the air inlet(8) are closed.
If you do not connect the supply air hose, the air inlet
control knob(9) should be in open position. The venting
slots at the air inlet(8) are open.
9
8
Feeding supply air via the supply air hose
• The supply air can be fed from outside to avoid creating
negative pressure in the room.
• The end of the supply air hose can be guided through the
open window. If required, secure the open window with
the corresponding means, so that the end of the supply air
hose cannot shift.
• The end of the supply air hose can also be hooked into a
tilted window.
For this purpose, we recommend using a window seal
(optional).
• Check whether the venting slots at the air inlet(8) are
closed. If the venting slots are open, please proceed as
follows:
1. Slide the air inlet control knob(9) to closed position.
ðThe venting slots at the air inlet(8) are closed.
Discharging exhaust air
• The exhaust air coming from the device contains waste
heat from the room to be cooled. For this reason it is
advisable to discharge the exhaust air to the outside.
• The end of the exhaust air hose can be fed through the
open window. If required, secure the open window with
the corresponding means, so that the end of the exhaust
air hose cannot shift.
• The end of the exhaust air hose can also be hooked into a
tilted window.
For this purpose, we recommend using a window seal
(optional). When attaching the window seal, a minimum
distance of 30 cm should be maintained between the
twohoses.
• Install the exhaust air hose inclined with the air direction.
How to use the insert
• Affix the inserts in the window gap and adjust the length
as needed. If required, use the extension pieces.
• Connect the flat nozzle to the insert:
A.
B. C.
• If you want to use the second air hose, connect it to the
insert too. Note that the flat nozzle is firmly connected to
the insert.
• Close the window until the insert is held securely.

EN 8
Operating manual – local air conditioner PAC 3550 PRO
Example with exhaust air hose and supply air hose:
Example with exhaust air hose:
For installing the exhaust air hose and supply air hose, please
observe the following:
≥ 43 cm
≤ 1 m
• Avoid kinks and bends in the air hoses, as they would lead
to an accumulation of emitted humid air or insufficient
fresh air supply causing the device to overheat and shut
down.
• The dimensions of the exhaust air hose and supply air
hose were especially made to fit the device. Do not replace
or extend the air hoses, for it could cause a malfunction.

9 EN
Operating manual – local air conditioner PAC 3550 PRO
Opening the ventilation flaps
• Prior to switching the device on, open the ventilation flaps
at the air outlet(1).
Connecting the power cable
• Insert the mains plug into a properly secured mains
socket.
Operation
• Avoid open doors and windows.
Operating elements
MID
COOL
C
Hr
HIGH LOWTIMER
FAN DRY
AUTO
F
18 19 20 21 22 23 24
2526
27
No. Designation Function
18 Timer button Switching the timer function on and off:
1 to 24hours in increments of 1h
19 Fan stage button Setting the fan speed in 3 stages (low,
medium, high).
Only enabled in cooling and ventilation
mode.
20 Increase value button Increasing the target temperature (17°C
to 30°C) or the number of hours of the
timer (1 to 24h).
21 Segment display Display of desired room temperature
when in operation
Display of current room temperature
when in standby
Display of timer
Display of fan stages:
F3 = highest stage
F2 = middle stage
F1 = lowest stage
Display of error codes
22 Decrease value button Decreasing the target temperature (17°C
to 30°C) or the number of hours of the
timer (1 to 24h).
23 Operating mode button Selecting the operating mode:
automatic mode
cooling
ventilation
dehumidification
24 Power button Switching the device on or off
25 Fan stage indication Indicates the fan stage:
HIGH = highest stage
MID = middle stage
LOW = lowest stage
26 Timer indication Illuminated when the timer is activated
27 Operating mode
indication
Indicates the selected operating mode:
AUTO = automatic mode
COOL = cooling
FAN = ventilation
DRY = dehumidification

EN 10
Operating manual – local air conditioner PAC 3550 PRO
Switching the device on
1. Allow the device to rest for a time.
2. Once you have completely installed the device as described
in the Start-up chapter, you can switch it on.
3. Press the power button(24).
ðThe device starts in cooling mode at 22 °C and at the
highest fan stage (initial start-up).
In standby mode, the device saves the previously selected
settings. These settings are not saved if the device is
disconnected from the mains.
The device switches off automatically when the condensation
tank is full. FL appears on the display.
Cooling
In cooling mode the room will be cooled down to a certain
preselected temperature.
1. Use the operating mode button(23) to select cooling mode.
ðCOOL appears on the operating mode indication(27).
ðThe currently selected target temperature is shown on
the segment display(21).
ðThe currently selected fan stage is shown on the fan
stage indication(25).
2. Select the desired target temperature by use of the arrow
buttons (20 or 22). Temperatures between 17°C and 30°C
can be selected.
3. Select the desired fan stage by use of fan stage button(19).
ðThe target temperature and fan stage are shown on the
display.
Dehumidification
In dehumidification mode the humidity level in the room is
reduced.
LOW and F1 are displayed for the fan stage.
If the room temperature is 15°C, the compressor starts. If the
room temperature drops below 15 °C, the compressor stops
and only starts again at 15°C with a delay of approx.3min.
Info
Remove the exhaust air hose and supply air hose
during dehumidification, otherwise the
dehumidification performance is too low and FL is
displayed.
1. Use the operating mode button(23) to select DRY mode.
ðDRY appears on the operating mode indication(27).
ðThe temperature and the fan stage (LOW) are preset in
this operating mode and cannot be changed.
Info
If the device is operated in a very humid environment,
the accumulating condensate must be discharged at
regular intervals (see Condensate discharge (manual
draining) in the Maintenance chapter).
Ventilation
In ventilation mode the room air is circulated, but not cooled.
The respective stage HIGH/MID/LOW appears on the display and
the respective stage F3/F2/F1 appears on the segment
display(21). The temperature cannot be set.
1. Use the operating mode button(23) to select FAN mode.
ðFAN appears on the operating mode indication(27).
ðThe currently selected fan stage is shown on the fan
stage indication(25).
2. Select the desired fan stage by use of fan stage button(19).
ðThe respective stage HIGH/MID/LOW appears on the
display and the respective stage F3/F2/F1 appears on
the segment display(21).

11 EN
Operating manual – local air conditioner PAC 3550 PRO
Automatic operation
In automatic mode both cooling and ventilation are regulated
depending on the ambient temperature and the preset target
temperature of 25 °C.
• With an ambient temperature of more than 25 °C the
device automatically runs in cooling mode until the target
temperature of 25 °C is reached.
• If the ambient temperature is less than or equal to (≤)
25 °C, the device will automatically be operated in
ventilation mode.
• The target temperature is preset to a fixed value of 25 °C
and cannot be changed manually.
1. Use the operating mode button(23) to select AUTO mode.
ðAUTO appears on the operating mode indication(27).
2. If required, change the fan stage by use of the fan stage
button(19).
Setting the timer
The timer has two modes of operation:
• automatic switch-on upon expiry of a preset number of
hours.
• automatic switch-off upon expiry of a preset number of
hours.
The number of hours can be between 1 and 24 and can be
adjusted in increments of 1h.
Automatic switch-on
1. Use the power button(24) to switch the device off.
2. Press the timer button(18).
ðThe timer indication (26) is illuminated.
ðThe current operating mode (Auto, Cool, Fan or Dry), the
fan stage and the flashing, current switch-on time in
hours are shown on the display.
3. Select the desired switch-on time in hours by use of the
arrow buttons(20 or 22).
ðThe number of hours flashes on the segment
display(21).
4. Adjust these settings as appropriate.
5. Wait for approx.5seconds until the display turns darker.
Your settings are saved now.
ðThe display will show HIGH/MID/LOW and F3/F2/F1, the
operating mode(27) and the timer indication(26).
Notes regarding automatic switch-on:
• Manually switching the device on disables the automatic
switch-on function.
• If you select 0hours, the timer will be off.
Automatic switch-off
üThe device is switched on.
1. Select the desired operating mode by means of the
operating mode button(23).
2. Press the timer button(18).
ðThe timer indication on the display is illuminated.
3. Select the desired switch-off time in hours by use of the
arrow buttons(20 or 22).
ðThe number of hours flashes on the segment
display(21).
4. Wait for 5seconds in order to save the setting.
ðThe display changes back to the previous indication.
ðThe timer indication(26) is permanently illuminated to
confirm automatic switch-off.
Night mode
Night mode can only be activated in cooling mode. Night mode
comes with the following settings:
• After 2 hours the preset temperature is increased by 1°C.
• After another 2 hours the temperature is again increased
by 1°C, thus the preset temperature is increased by a total
of 2°C within 4 hours. Afterwards, the temperature is kept
at this value.
• The fan speed is automatically lowered to the the min.
level and cannot be changed manually.
To deactivate night mode, please proceed as follows:
1. Press the operating mode button(23) until the cooling mode
indicationappears on the display.
2. Simultaneously press the timer(18) and decrease value(22)
buttons.
ðThe fan speed is automatically adjusted to the lowest
level.
ðThe night mode is not shown on the display.
3. To switch off night mode, simultaneously press the
timer(18) and decrease value(22) buttons again.
Changing the unit °C / °F
The temperature in the segment display(21) can be indicated in
°C or °F.
Please proceed as follows to change the temperature unit:
1. Simultaneously press the arrow buttons(20 and 22).
Alternatively, you can press the °C / °F button(31) on the
remote control.
ðThe displayed temperature is converted to the other unit.

EN 12
Operating manual – local air conditioner PAC 3550 PRO
Remote control
All settings of the device can also be made using the remote
control included in the scope of delivery.
Cool Fan Dry
Heat
Timer
°C
°F
Hr
Auto
Swing
TIMER SWING °C °F
UP
FAN
POWER
MODE
DOWN
18
29
30
23
28
34
33
19
24
21
31
20
22
26
32 Dry
Auto Cool Fan
No. Designation Meaning
18 TIMER button Switching the timer function on or off,
1 to 24hours in increments of 1h
19 FAN button Setting the fan speed in 3 stages: High,
Medium and Low
Only enabled in cooling and ventilation mode.
20 Increase value button
(UP)
Increasing the target temperature (17to
30 °C) or the number of hours of the timer
(1 to 24h).
21 Segment display Display of current room temperature when in
operation
Display of target temperature while setting it
Display of timer
Display of error codes
22 Decrease value button
(DOWN)
Decreasing the target temperature (17to
30 °C) or the number of hours of the timer
(1 to 24h).
23 MODE button Selection button for the mode of operation
automatic mode
cooling
ventilation
dehumidification
24 POWER button Power button:
Switching the device on or off
26 Timer indication Timer active
28 Battery indication Charging status of the batteries for the
remote control
29 Operating mode
indication
Auto = automatic mode
Cool = cooling
Fan = ventilation
30 Fan speed indication Low =
Medium =
High =
31 °C / °F button Switching temperature indication between °C
and °F
32 DRY mode indication Dry = dehumidification
33 Transmitter indication Indicates transmission to the device when
the button is pressed
34 Remote control
transmitter/ receiver
Communication between device and remote
control
Info
After a longer period of non-use, the remote control
will switch to standby mode. Standby mode can be
terminated by pressing the POWER button on the
remote control. Please note that the device
automatically takes over the current settings from the
remote control.
Automatic defrost
At low ambient temperatures, ice may form at the evaporator.
The device will then carry out an automatic defrost.
The compressor switches off and the fan keeps running until
defrosting is completed. The duration of the defrost process can
vary.
Do not switch off the device during automatic defrost. Do not
remove the mains plug from the mains socket.
Shutdown
Warning of electrical voltage
Do not touch the mains plug with wet or damp hands.
• Switch off the device.
• Hold onto the mains plug while pulling the power cable out
of the mains socket.
• Empty the condensation tank, if need be.
• Clean the device according to the Maintenance chapter.
• Store the device according to the Storage chapter.

13 EN
Operating manual – local air conditioner PAC 3550 PRO
Errors and faults
The device has been checked for proper functioning several
times during production. If malfunctions occur nonetheless,
check the device according to the following list.
The device does not start:
• Check the power connection.
• Check the power cable and mains plug for damages.
• Check the on-site fusing.
• Observe the operating temperature according to the
Technical data chapter.
• Check the filling level of the condensation tank and empty
it if necessary. The condensation tank full indication (FL)
must not light up.
• Wait for 10minutes before restarting the device. If the
device is not starting, have the electrics checked by a
specialist company or by Trotec.
The device works with reduced or no cooling capacity:
• Check whether cooling mode is selected.
• Check the proper fit of the exhaust air hose. In case of
kinks, bends or blockage in the hose, exhaust air cannot
be discharged. Clear the way for the exhaust air.
• Check the proper fit of the supply air hose. In case of
kinks, bends or blockage in the hose, supply air cannot be
fed. Clear the way for the supply air.
• Check the position of the ventilation flaps. They should be
opened to the maximum.
• Check the air filter(s) for dirt. If necessary, clean or replace
the air filter(s).
• Check the minimum distance to walls or other objects.
Position the device a little more in the room's centre if
required.
• Check whether any windows and/or doors of the room are
open. If so, close them. The window for the exhaust air
hose has to remain open nonetheless.
• Check the temperature setting at the device. Reduce the
set temperature if it is higher than the room temperature.
The device is loud or vibrates:
• Check whether the device is set up in a stable and upright
position.
Condensate is leaking:
• Check the device for leaks.
The compressor does not start:
• Check whether the overheating protection of the
compressor has tripped. Disconnect the device from the
mains and let it cool down for approx. 10minutes before
reconnecting it.
• The compressor has a built-in protective function. After
switch-off, a restart of the compressor is delayed for
3minutes.
• In dehumidification mode, the compressor only starts at a
room temperature of≥15°C.
The device gets very warm, is loud or loses power:
• Check the air inlets and air filter for dirt. Remove external
dirt.
• From the outside, check the device for dirt (see chapter
Maintenance). If the inside of the device is dirty, have it
cleaned by a specialist company for cooling and air-
conditioning or by Trotec.
The device does not respond to the infrared remote control:
• Check whether the distance between remote control and
device is too large and reduce it, if necessary.
• Make sure there are no obstacles, such as furniture or
walls, between the device and the remote control. Ensure
visual contact between device and remote control.
• Check the charging status of the batteries and change
them, if required.
• If the batteries have only just been changed, check them
for correct polarity and change them if required.
Note
Wait for at least 3 minutes after maintenance and
repair work. Only then switch the device back on.
Your device still does not operate correctly after these
checks?
Please contact the customer service. If necessary, bring the
device to a specialist company for cooling and air-conditioning
or to Trotec for repair.

EN 14
Operating manual – local air conditioner PAC 3550 PRO
Error codes
The following error codes can be displayed:
Error code Cause Remedy
FL Condensation tank full Discharge condensate (manual
draining) according to the
Maintenance chapter.
E1 Defective coil temperature
sensor
Disconnect the device briefly from
the mains.
Should the error still be displayed
after the restart, please contact
the customer service.
E2 Defective room
temperature sensor
Disconnect the device briefly from
the mains.
Should the error still be displayed
after the restart, please contact
the customer service.
E4 Frost protection Once the coil temperature drops
below 0°C, the device will switch
off. As soon as the coil
temperature has increased to at
least 8°C, frost protection
switches off and the device can
be operated again.

15 EN
Operating manual – local air conditioner PAC 3550 PRO
Maintenance Maintenance intervals
Maintenance and care interval before every
start-up
as needed at least every
2 weeks
at least every
4 weeks
at least every
6 months
at least annually
Empty condensation tank and drain hose X
Check the air inlets and outlets for dirt and
foreign objects and clean if necessary
X X
Clean the exterior X X
Visually check the inside of the device for
dirt
X X
Check the air filter for dirt and foreign
objects and clean or replace if necessary
X X
Replace air filter X
Check for damage X
Check the attachment screws X X
Test run X
Maintenance and care log
Device type: ............................................. Device number: ....................................
Maintenance and care interval 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Empty condensation tank and drain hose
Check the air inlets and outlets for dirt and
foreign objects and clean if necessary
Clean the exterior
Visually check the inside of the device for
dirt
Check the air filter for dirt and foreign
objects and clean or replace if necessary
Replace air filter
Check for damage
Check the attachment screws
Test run
Remarks:
1. Date: ................................
Signature: ............................
2. Date: ................................
Signature: ............................
3. Date: ................................
Signature: ............................
4. Date: ................................
Signature: ............................
5. Date: ................................
Signature: ............................
6. Date: ................................
Signature: ............................
7. Date: ................................
Signature: ............................
8. Date: ................................
Signature: ............................
9. Date: ................................
Signature: ............................
10. Date: ..............................
Signature: ............................
11. Date: ..............................
Signature: ............................
12. Date: ..............................
Signature: ............................
13. Date: ..............................
Signature: ............................
14. Date: ..............................
Signature: ............................
15. Date: ..............................
Signature: ............................
16. Date: ..............................
Signature: ............................

EN 16
Operating manual – local air conditioner PAC 3550 PRO
Activities required before starting maintenance
Warning of electrical voltage
Do not touch the mains plug with wet or damp hands.
• Switch off the device.
• Hold onto the mains plug while pulling the power cable out
of the mains socket.
Warning of electrical voltage
Maintenance tasks which require the housing to be
opened must only be carried out by authorised
specialist companies or by Trotec.
Cleaning the housing
Clean the device with a soft, damp and lint-free cloth. Ensure
that no moisture enters the housing. Protect electrical
components from moisture. Do not use any aggressive cleaning
agents such as cleaning sprays, solvents, alcohol-based or
abrasive cleaners to dampen the cloth.
Visual inspection of the inside of the device for dirt
1. Remove the air filter.
2. Use a torch to illuminate the openings of the device.
3. Check the inside of the device for dirt.
4. If you see a thick layer of dust, have the inside of the device
cleaned by a specialist company for cooling and
air-conditioning or by Trotec.
5. Put the air filter back in.
Cleaning the air filter
The air filter has to be cleaned as soon as it is dirty. This is
brought to light e.g. by a reduced capacity (see chapter Errors
and faults).
Warning!
Ensure that the air filter is not worn or damaged. The
corners and edges of the air filter must not be
deformed or rounded. Before reinserting the air filter,
make sure that it is undamaged and dry!
1. Remove the air filter from the device.
2. Clean the filter using a slightly damp, soft, lint-free cloth. If
the filter is heavily contaminated, clean it with warm water
mixed with a neutral cleaning agent.
3. Allow the filter to dry completely. Do not insert a wet filter
into the device!

17 EN
Operating manual – local air conditioner PAC 3550 PRO
4. Reinsert the air filter into the device.
Condensate discharge (manual draining)
In cooling and dehumidification mode condensate is formed,
which is mostly discharged via the exhaust air.
The remaining condensate is collected in a container within the
housing. The condensate ought to be drained regularly.
If too much condensate accumulates, the device switches off
and indicates this via the FL indication on the segment
display(21).
1. Carefully transport or wheel the device to a suitable location
for discharging the condensate (e.g. a drain) or position a
suitable collection container under the condensate
outlet(10).
2. Unscrew the sealing cap from the condensate outlet(10).
3. Remove the rubber stopper from the condensate outlet(10).
4. Let the condensate run off completely.
5. Reattach the rubber stopper to the condensate outlet(10).
Check the rubber stopper for tight fit.
6. Screw the sealing cap onto the condensate outlet(10).
ðThe FL indication on the segment display(21) will go out as
soon as the condensate has been drained.
Refrigerant circuit
• The entire refrigerant circuit is a maintenance-free,
hermetically sealed system and may only be maintained or
repaired by specialist companies for cooling and
air-conditioning or by Trotec.
Activities required after maintenance
If you want to continue using the device:
• Leave the device to rest for 12-24hours, so the
refrigerant can accumulate within the compressor. Wait
12-24hours before switching the device back on! Acting
contrary might lead to compressor damage and a
malfunctioning device. If so, any warranty claims will be
voided.
• Reconnect the device to the mains.
If you do not intend to use the device for a considerable time:
• Store the device according to the Storage chapter.

EN 18
Operating manual – local air conditioner PAC 3550 PRO
Technical annex
Technical data
Parameter Value
Model PAC 3550 PRO
Cooling capacity 3.5 kW
Dehumidification performance 1.3 l/h
Operating temperature 7 to 35°C
Temperature setting range 17 to 30°C
Max. air volume flow 380 m3/h
Mains connection 1/N/PE~ 230 V / 50 Hz
Nominal current 5.7 A
Power input (cooling operation) 1.3 kW
Sound pressure level 55 dB(A)
Refrigerant R410A
Amount of refrigerant 685 g
Weight 34 kg
Dimensions (width x height x depth) 470 x 840 x 425 (mm)
Minimum distance to walls and other
objects:
top (A):
rear (B):
sides (C):
front (D):
50 cm
50 cm
50 cm
50 cm
Wiring diagram

19 EN
Operating manual – local air conditioner PAC 3550 PRO
Spare parts drawing and list Note!
The position numbers of the spare parts differ from those
describing the positions of other parts mentioned in this
operating manual.