Arctiko SF SERIES User manual

Service Manual
SF MODELS
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*
*

o
SF 150 / 500
i
i
2
HC
HC
5b.
5c.
5d.
5e.
5f.

1. Working safety
This page provides general safety information for servicing the freezer.
The instruction manual includes additional information about security and cleaning of freezer.
1.1 General safety
To prevent personal and equipment damage, the electrical safety / legislation of your country must
be observed.
1. Never expose the moving parts of the plant to physical overload.
2. When repairing plant parts, safety concerns must be respected.
3. When using tools, spare parts and equipment, the existing security concerns must be
met.
4. Maintenance procedures described in this manual must only be performed by trained
personnel.
1.2 Electrical safety
Maintenance procedures may imply a voltage hazard. Follow existing safety instructions, including
the low voltage and current EU directives and other derectives of your country.
Always disconnect the power to the unit before repair or parts replacement is initiated.
Use only electrical equipment which is designed for the freezer.
1.3 Chemical and biological safety
Always observe the requirements for safe handling, as described below.
Read the instruction manual before using, cleaning and servicing the freezer.
Wear eye protection and gloves when working with refrigerants.
Skin contact with liquid refrigerants may cause frostbite.
Good ventilation and air extraction at the work area is required.
Stay in environments with high concentrations of refrigerant vapors is harmful.
Low concentrations may cause narcotic effects.
Symptoms of this may include: headache, shortness of breath, nausea and diff culties in
concentration. Possibly: Mobility / consciousness.
Read the safety data sheet section 5d.
3

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2. Information about the freezer
2a. General information about the freezer
Door handle with lock
Backside
Sublids
Castors Controller Dixell XR30CX
Motor compartment
Condenser
Porthole

5
When contacting the supplier it is important to inform the model and serial number.
The label plate is located behind the front panel in the engine compartment.
For technical problems: See troubleshooting schedule (3b).
Label plate located on the device.
2b. Controller Dixell XR30CX
The controller is located in the lower right corner on the front of the freezer.
Model Voltage/Hz Temp.range Refrigerant/Filling Serial no.
Alarms:
High / low temperature (adjustable)
Power failure
Sensor error
Memory error (Eprom)
Digital display.
Adjustable high / low temperature.
Visual and audible alarm.
Contact for remote alarm.
48 hour battery backup during power
failure.
Manual defrosting. See section 4e.
See section 5 for:
Datasheet for Dixell XR30CX. See 5e.
Settings. See 5f.
Wiring diagram. See 5a.
Datasheet for commpressor. See 5c.
Spare parts list. See 5b.
SF 500
SF 500

6
*) Power consumption is monitored over time for each element. Pt. no values.
3. Troubleshooting / Repair
3a. General operating problems
Malfunction of the device, which can arise from improper handling of the device:
Moving or long periods of inactivity of the unit:
When moving or after long periods of inactivity, you must wait 1-2 hours before the freezer is
started.
Loading the freezer
When loading large quantities of items into the freezer, the temperature will rise temporarily.
Repeated lid openings
In case of repeated lid openings, leaks or faulty gaskets, the humidity will cause rime and possibi-
lity of ice formation inside the device and around the lid / sublids.
Component failure occurred during operation
Use the troubleshooting table section 3b.
2c. Model information
Model SF 150 SF 500
Temp. range °F
Max. ambient temp. °F
Power supply (V)
Frequency (Hz)
AMP (A)
Power consumption
(KWh/24h)
Power (KW/Hp)
No. of compressors
Refigerant/filling (gram) HC / see label plate
-40/-60 -40/-60
25 20
60
1
3,6
6,6 6,6
*)
Temp. range °C
Max. ambient temp. °C
-40/-76 -40/-76
77 68
120 120
60
3,6
*)
1
HC / see label plate

7
Problem Cause Recommended
equipment
Troubleshoo ng Ac on
The unit does not
freeze and the
compressor does
not start.
The socket or
fuse is defect.
Universal
instrument
test Lamp
Check the instal-
la on.
New fuse / plug.
Power cable is defect. Check power
cables
and wiring in the
engine compart-
ment.
Repair errors. Con-
sider using wiring
diagram sec on 5
The controller is defect. Change controller
The sensor is defect. Test sensor. See sec on 3n
Faulty windings in
compressor.
Test compressor
windings.
See sec on 3k
Start relay defect. Test start relay. See sec on 3m
Fault in electrical instal-
la on.
Use wiring-dia-
gram.
See sec on 5
The unit does not
freeze. The com-
pressor tries to
start, but fails.
Low voltage
Voltmeter Check voltage Find the cause.
Defect or faulty start
relay/capacitor.
See sec on 3m See sec on 3m Change start relay/
capacitor
Defect compressor
windings.
Ohmmeter Check for electrical
failure in the com-
pressor.
Change the compr.
See sec on 3f
Defect rotor (compres-
sor failure)
Change the compr.
See sec on 3f
High pressure in the
cooling system.
Tapping valve
Manometer
Filter
Open the system
and rinse the sy-
stem with nitrogen.
Remove 5cm of
the capillary tube.
Change lter.
See sec on 3e
The unit has been
transported horizon-
tally.
The unit must rest
a few hours before
start.
Ambient temp. low.
Compr.oil too cold.
Eksternal thermo-
meter.
Check the temp. Find a be er place-
ment.
May be general, if the
ven la on is not suf-
cient.
Ambient temp. high.
Eksternal thermo-
meter.
Thermometer
Check, that the
compressor not
exceeds 70°C.
Check ambient
temp.
Find a be er pla-
cement or ven la-
on.
Find a be er pla-
cement or ven la-
on.
3b. Troubleshooting schedule



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3b. Troubleshooting schedule
melborP Cause Recommended
equipment
Troubleshoo ng Ac on
The compressor
runs constantly.
The unit freezes
normal or colder.
The sensor is in-
correctly installed.
Sensor is defect.
Controller is dama-
ged.
Icing on the frame. Check the door for
leaks.
See sec on 4a.
The temperature is
set too low.
Check the se ngs
in the controller.
Set new values.
See sec on 5f.
The compressor
starts normally,
but stops again.
Too high voltage. Voltmeter Meassure the vol-
tage.
Inform.
Too high ambient
temperature.
external thermometer Check the tempe-
rature and ven la-
on.
Be er placement
or ven la on.
The unit cools too
much, too li le or
not at all.
The compressor
may run con -
nuously.
Leakage in the sy-
stem.
Electronic leak-seeking,
soapy water, leak se-
eking spray.
First check the solder
points, comp,
capacitor, etc.
See sec on 3.
The fan is not run-
ning.
Voltmeter Check for errors. Replace the fan.
See sec on 3p.
The evaporator is
blocked by ice.
The unit cools too
much or not at all.
Compressor run-
ning constant.
Li le or no com-
pressor
capacity.
service valve
Manometer
Mount the valve
and check pressure.
Change compres-
sor.
See sec on 3f.
Insucient
cooling.
The device has
recently been l-
led up with a large
amount of heat.
Inform the user.
In addi on, tem-
perature of the air
is too high.
external thermometer Check temperature. Find be er ven la-
on or placement.
In addi on, the air
temperature is too
low.
external thermometer Check temperature. Find be er ven la-
on or placement.


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Examples of troubleshooting with a manometer connected to the process piping of the cooling sy-
stem. The system is blocked:
Suction pressure is very low.
Pressure equalization takes place very slowly or not at all.
Reason: Icing or dirt in the capillary tube or lter, or blockings in the system due to other reasons.
Reason: No compressor capacity
The suction pressure is too high.
The suction pressure does not change noticeably when the compressor stops.
This can be tested with a volumetric meter.
Leakage in the system
The pressure gauge indicating insufcient suction pressure.
On the pressure side the temperature increases.
Pressure equalization time is short.
Countervailing pressure is lower than expected.
Be sure that the pressure is sufcient for a pressure test.

10
3c. Opening of the cooling system
To prevent moisture from penetrating under repair, the system must not be open for more
than 15 minutes.
Prepare spare parts components before the system is opened.
The new connector is soldered to a tube with valve.
Verify that the new filter packaging is intact and that the filter is not damaged.
If the packaging has been broken for a longer period, the filter will bee moist.
3d. Evacuation of the refrigerant
It is recommended that the compressor is running at least 25 min. before refrigerant eva-
cuation is undertaken. This ensures that the system is hot, so that the refrigerant easier can
be pulled out of the compressor oil.
A drilling tongs with valve is placed on the process pipe.
The refrigerant is evacuated.
Install a valve on the pressure tube and process pipe.

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The cooling system is evacuated with a two-stage vacuum pump for at least 30 minutes.
Both from the pressure piping and process piping.
Blow the system with nitrogen, both from the suction and the pressure side.
3e. Changing the dryfilter
The dryfilter must pick up moisture in the system during operation and function as the ca-
pillary tube in front of the capilary tube, in order to avoid clogging. Clogged filter or capillary
tube causes a pressure drop, by this the filter becomes colder and ice will block the system.
The compressor is overloaded with a possibility of crash.
The dryfilter is placed after the condenser outlet, immediately before the capillary. Any
opening of the cooling system, dryfilter change to ensure the function and lifetime of the
freezer.
It is therefore recommended always to order a new filter drier, along with a new service cy-
linder with cooling agent.
To prevent moisture from penetrating during the repair, the drying filter must not be open
for more than 10 minutes.
After evacuation and blowing with nitrogen, the tubes must be cleaned on both sides of the
filter drier, before cutting. By doing this the pipe ends are free from impurities and metal pie-
ces and ready for soldering.
Cut off the pressure pipe close to the filter with a pipe cutter.
Cut off the capillary tube with a capillary tube scissors.
It is recommended to use a special tongs to create a wave on the capillary tube which en-
sures the correct positioning in the filter.
Process pipe and pressure
tube fitted with a valve.

12
A
a
Right
B
Wrong
In the figure A the capillary tube is correctly installed in a dryfilter. In order to ensure effcient
use of the filter, it must be positioned with an inclination of at least 150 and the capillary tube
must be underneath.
In the figure B the capillary tube is too close too the web of the filter. It provides great resistan-
ce and filter blocking after a short time. Or too far away, so it will be filled with flux or solder.
Solder the new filter.
Clean the solder points with a wire brush.
Flush the system with nitrogen.
If only the dryfilter is to be replaced, the system must be pressure tested. See section 3g.

13
3f. Changing the compressor
Evacuate the refrigerant of the system. See section 3d.
All tubes are cut with a pipe cutter. Do NOT solder of.
When replacing the compressor the dryfilter must also be replaced. See section 3e.
The suction and pressure pipes of the compressor must be cleaned and cut with a pipe cut-
ter just above the soldering pipe.
Demount the compressor.
Install the new compressor, which is prepared as described before. (3c)
In order to avoid decomposition of refrigerants which may remain in the system during the
soldering operation, the system is blown with dry nitrogen, respectively, from the suction
side respectively pressure side.
Solder the tubes on to the compressor.
Pressure test the system.
3g. Pressure testing and leak detection
Pressure test the system with nitrogen. The pressure must be 10 bar during a period of 2
hours.
Check the solder points with soapy water or leak detection spray.
In case of any leaks, empty the system for nitrogen.
Repair and pressure test again.
During operation leak detection must be performed on the pressure side with the compres-
sor running. The suction side must be tested while the compressor is stopped, and the
pressures are equalized.
The nitrogen must slowly be emptied from the system.

14
3h. Vacuum suction / Vacuum check
A vacuum is made on two locations on the system, one on the process tube and one on the pipe branch
used for testing located on the pressure tube with an explosion-proof 2-stage vacuum pump.
The pressure should be 2 mBar or lower for at least 12 hours.
The system is now ready for the filling of the refrigerant.
3i. Refrigerant filling with HC
Before filling the refrigerant, a vacuum must be suched. See section 3h.
Note that HC is to be supplied from a bottle containing a specific amount of refrigerant.
Common procedures for other refrigerants can not be used.
Further it is important that the entire contents of the bottle is introduced into system to ensure optimal perfor-
mance.
The contents of the bottle must be mixed before use by shaking the bottle for at least 1 minute before the
filling.
In order to perform the filling operation properly, it is necessary to use a capillary tube with the valve before
the filling site, instead of a conventional feeding tube. The reason is that the capillary tube ensures that the
entire quantity of refrigerant is introduced to the system. If an ordinary filler hose is used, it must be as short
as possible.
WARNING! HC is flammable!
The refrigerant cylinder is weighed before use.
The cylinder must be shaken for 1 min. before use.
During the filling procedure the cylinder must be upside down.

15
Cylinder with manometer Vacuum suction of the filling hose
Loading procedure
Make vaccum. See section 3h.
The cylinder with manometer is connected to the coupler of the process piping.
Remember to first made vacuum in the filling hose to empty it.
Fill the refrigerant into the system until the pressure gauge on the pressure tube shows approx. 5 bar.
Start the compressor and let it run for 2-3 min. Open to the cylinder again to get out the remaining refrigerant.
When the pressure in the bottle shows 1 bar, the bottle is empty.
It is important that the valve is closed immediately, in order to avoid that the refrigerant runs back into the cylinder.
Now the cooling system is filled with refrigerant and only needs to be closed.
Disconnect the filling hose with pressure gauge from the process piping.
Push the process piping and pressure pipes together with a special tongs.
Cut off valve with a pipe cutter.
Closing the process tube on systems with flammable refrigerants must be performed by professionals with a Lok
Ring end sleeve. It is recommended NOT to solder system.
Clean the pipe with steel wool or emery cloth. Use rotational movement in order to avoid scratching the length of
the tube.
Apply LokPreb to the end of the tube.
Turn the end sleeve 360° so that the LokPreb is placed around the tube.
Squeeze the end sleeve together with the special tool as shown in the illustration.
Start the freezer and control the function of the unit.

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3j. Electrical troubleshooting
Before starting systematic troubleshooting, check the following:
Proper voltage is present.
Electrical equipment used, is suitable for the compressor.
The wires are properly installed according to wiring diagram.
There is no transition between the live parts and ground.
Control of the transition to ground.
In order to check whether there is a transition between the conducting components and the chas-
sis, the insulation resistance is tested by using an ohmmeter or the second high-voltage equip-
ment. An ohmmeter can be used for a rough check. The Ohmmeters one clamp is placed on the com-
pressor’s ground terminal. The second clamp on the compressor shared leg (see sketch). Showing
ohmmeter a transition, the compressor is replaced.
Uses high voltage test systems with flammable refrigerants, ensure that the system is completely
drained of coolant, as this can cause sparks during the test.
Plug on the compressor
Shared leg Ground terminal

17
3k. Electrical fault - compressor
Remove the start relay from the compressor and use an ohmmeter to test the compressor head
and start recovery. Connect ohmmeter between the common connector and start winding, then the
winding is to debug. See the picture below.
Dimensions of the compressor connections to determine whether driving and startwinding are intact.
This is done by measuring the resistance of these. Carry out three resistance measurements on
compressor penetrations. The sum of the two smallest measurements, the intact windings will be
.teehsatadrosserpmocehtfoseulavtnerrucehtfidniF.tsehgihehtotlauq
e
By measuring the compressors with built winding protector it
is extremely important to measure between K and S, as this
measure will tell if this is burnt windings or an open winding
protector.
Since it is relatively small value to be measured, it would be
a great advantage to use a digital ohm-meter.
Indicates the measurement error, the compressor is replaced.
Ohm-measurement
Winding
protector

18
3m. HST-start relay, start capacitor
Connect a voltmeter between terminals 10 and 13 at the start of the relay. If no voltage is present,
there is either a faulty cable or also start relay is defective.
Connect a voltmeter between terminals 10 and 14. If no voltage is present, the temperature sensor
or its cable is defective.
3l. Controller - demounting the display
Demounting of controlller Dixell XR30CX.
The controller is located in the lower right corner on the front of the freezer in a cut-out 29 x 71 cm.
Disconnect the power supply.
Press the flaps on both sides of the controller. See illustration.
Pull back the clips.
Press the the controller out of the motor compartment.
Disconnect all cables.

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When replacing the compressor should start relay and start capacitor also replaced.
Start relay is placed on the compressor’s three terminal legs and clamped.
The voltage is connected to terminals 10 and 14.
The start capacitor is connected to terminals 11 and 13 and clamped.
A relay can be checked with an indicator light as
shown in the sketch maintain end. The relay is usu-
ally ok, when in standing position is not lit, and when
it is lit when the relay is upside down.
The start capacitor can be checked by injecting the
normal voltage for a few seconds and than shorting
it. When sparks are generated, the capacitor is in
order.
b. Cover e. The compressor blades c. Start capacitor
a2. Start relayd. Wire hanger

20
3n. Sensor for the controller
PT 100
A faulty sensor will typically prevent the compressor from starting.
If the sensor is covered with ice, the compressor will run more than usual and cool too much.
The easiest way to check the function of the sensor, is to place your hand around the sensor. If the
temperature recorded on the display in the front panel does not rise, the sensor is faulty and needs to
be replaced.
The sensor can also be tested with an ohmmeter.
The PT 100 sensor is located in the stage on the right side of the freezer.
Remove the alu. panel.
Remove the sealing material around the introdcuction and pull out the sensor.
Remove the sensor pins on the terminal 11 and 12 of the controller. See wiring diagram page
25.
Remember! The sensor must be replaced with a sensor with the same characteristics as the original.
Sensor PT 100 Alu. panel