ULT DW-86L288 User manual

U
L
TF
reezer
User's manual
DW-86L288/388/628
DW-86W420
Read this user's manual carefully before
using the ULT freezer.
Place this manual in a convenient
location for future reference.

Read this User's Manual carefully before using the appliance.
Keep this manual for future reference.
The actual design, color, and door pattern of your Haier ULT may vary
as a result of continuous improvement. This ULT unit should not be
used to store live creatures or fresh flowers, as they require special
temperatures.
Primaryl features.....................................................................................................3
Installation Loation..................................................................................................6
Preparation and operation instructions ...................................................................7
Control panel ..........................................................................................................8
Functions and operational in ............................................................................8
1.Panel display .................................................................................................8
1.1Work status .............................................................................................8
1.2Alarm Indication.......................................................................................8
2.Selection of Security Code ............................................................................9
3.Adjustable of Control Panel ...........................................................................9
3.1Function Selection .....................................................................................9
3.2Battery .....................................................................................................10
Freezer Defrosting,storage of unit.........................................................................11
Cleaning................................................................................................................12
Special Notes........................................................................................................13
A
fter-sales service ................................................................................................14
Technical data.......................................................................................................15
Packing list ...........................................................................................................15
388 288
Note: when the room temperature is 25 , the freezer temperature can reach -86
Model
Ambient
Temperature( )
Circuit breaker
Temperature
range( )
Net volume(L)
42420Rated
voltage(V)
Rated frequency(Hz)
Rated Current(A)
Weight(kg)
Dimensions
(D*W*H)(mm)
Connection type
DW-86L628
10~32
I
-40~-86
628
220
60
6
301
1000*897*1960
Y
DW-86L628
10~32
I
-40~-86
628
115
60
6
301
1000*897*1960
Y
DW-86L628
10~32
I
-40~-86
628
220
60
7
301
1000*897*1960
Y
DW-86L388
10~32
I
-40~-86
388
220
60
7
255
860*757*1950
Y
DW-86L288
10~32
I
-40~-86
288
220
60
7
217
860*757*1621
Y
DW-86W420
10~32
I
-40~-86
420
220
60
217
2130*870*1020
Y

In the process of using the unit, you should pay attention to how the unit operates.
Should there be changes of the materials stored in the unit, follow the guidelines
below to attempt to correct the situation. If the conditions do not improve, please
notify Haier's local service center for repair. This will reduce your loss of properties.
Trouble shooting
The unit does not operate. Check the power source to make sure it is 220 V. Also
check the main power switch to see if it is turned on.
Inspect the temperature set point to see if it is set up
properly.
The unit might be too close to a heat source.
The unit might be too close to a wall.
The air condenser might be clogged with dirt. You may
clean it with a brush.
Large amount of products have been loaded into the unit
in the last few hours. Consider raising the temperature
setting so that the unit will cycle normally then lower the
set point gradually.
There is ice build-up on the
interior wall and near the inner
doors.
Space the products so that there is ventilation in between
them.
The unit's door is not closed properly.
Do not open the door unless it is necessary.
The unit is not placed on a flat surface.
The noise is usually from the compressors. It is
expected that ULT's operate with more noise than a
household unit.
The banging noise might come from the metal
refrigeration parts contracting. It is suggested that the
temperature be reduced gradually.
The Haier ULT is equipped with a microcomputer control, and a
digital temperature display in a range of -10 to -86 . The normal
operating temperature range is -40 to -86 .
The unit has a number of standard protection functions. They
include compressor delay protection, low voltage booster, and high
voltage protection.
The refrigeration system for the unit features a well-balanced
cascade technology powered with imported low-temperature rated
specialty compressors.
Advanced LED display on the freezer can display the cabinet
temperature, set point, ambient temperature, and line voltage. It
also allows the user to set the high temperature alarm, low
temperature, and notifies the users through display should the unit
develop a failure.
Innovative and integrated design for the door lock and handle
provide convenient application.
Haier ULTs are suitable for applications in research and practice
institutions such as hospitals, epidemic prevention stations, and
many others.
The technical data published in this manual are nominal. The actual
unit's performance may vary to a small extent due to a number of
factors.

Unplug the unit before cleaning. When cleaning the freezer, use a soft cloth or
sponge with light soapy water. Afterwards,
use a piece of dry cloth to dryout the unit to
prevent rusting.
Clean the air condenser, refrigeration tubing
and compressors frequently. This is to
achieve the best refrigeration effect.
Do not use organic solvent, boiling water,
laundry detergent or any acidic chemical to
clean the unit.
Do not use water to flush the unit directly. Do not use a wire brush or a hard brush to
clean the unit.
A dedicated power socket is required to
operate this unit. A standard three-prong
power plug is included with the equipment.
Be aware that one of the three prongs is for
grounding purposes. Removal of the ground
prong is strictly prohibited for safety reasons.
Warning: The electrical power plug should
be securely plugged into the power socket. A
loose plug in the socket may cause fire.
Never store flammable, explosive or corrosive
materials in the unit.
Do not use any spray with flammable
chemicals near the unit.
Never allow children to play inside the freezer
as they can be accidentally trapped in the unit
and possibly suffocated.
If there is a flammable gas leak in the vicinity
of the unit, please proceed with the following:
Turn off any leaky valves
Open doors and windows
Do not plug and unplug the unit
If the power is interrupted, allow a 5 minute
delay before powering up the unit again to
prevent any potential damage to the
compressors and the cooling system. Unplug
the unit from the power supply whenever
repair work or maintenance is performed.
Due to extremely cold surfaces inside the
freezer, you should always wear hand
protectors to load and unload products from
the freezer.
The appliance requires 220V/50Hz for 628/388/
288/310 or 220V/50Hz and 220V/60Hz for 628.
A regulator with a capacity of 4000W or higher
must be installed if the voltage if beyond the
rated voltage of ±10%.If the power cord needs
to be extended, the extended conductor must
have a cross area of equal or greater than 2m
for 628/388/288/310(220V 50/60Hz) or 3m
for 628(115V 60HZ ),and the extended length
2
2
must not exceed 3m.

The unit should be located on a solid surface
without any packing materials. When moving
the unit, never tilt it over 45 degrees nor
apply force on pipes or door handle to avoid
potential damages.
Keep the unit away from direct sunlight or any
heat source. The freezer should only operate
at an ambient cooler than 32
The unit should be kept clear away from any
objects for ventilation.
Do not operate the unit in an ambient
temperature bellow 5 .The best temperature
range is 18 ~ 25
Do not locate the unit in a damp area or near
a sink. Use a soft cloth to wipe the unit if
necessary.
Never place the unit in an outdoor area.
This sign is directly related to operator safety and equipment safety. The contents
and instructions that follow the sign must be strictly followed.
This sign refers to prohibited actions. Violation may result in damage of the
freezer or compromise the operator's safety.
Freezer Defrosting, Storage of Unit
Defrosting
1.During normal usage of the unit, the interior
of the unit accumulates frost. If this layer of
frost is too thick, refrigeration effect is
negatively impacted. Electricity consumption
rate will increase. Therefore, when the
thickness of the frost is about 10 mm, please
use the plastic scraper to remove the frost.
2.Before the defrost process starts, remove all
stored goods from the unit and place them in
another freezer for temporary storage. During
defrost, open the freezer door to let the unit air
out.
3.When the frost thaws, use a soft cloth to
absorb water, then use a dry cloth to wipe
clean the interior of the unit. Power the unit
back up. Let the unit run down to set
temperature. Place the original goods back in
the freezer.
4.To speed up the defrost process; you may
place a flat container of warm water at 50 in
the freezer.
Decommission of freezer
If you need to store your unit for a long time,
make sure that you disconnect the power.
Open the door, thaw out the frost and dry the
unit. Then the unit can be put away for
storage. If you need to discard the unit,
please make sure to keep it away from a fire
source. Send the unit to a proper place for
disposure.
Warning: Do not use an electric heater to
defrost the unit. Do not use a metallic tool or
a sharp tool to scrap the frost on the unit.

D.If the set point temperature, the high temperature alarm, and the low temperature alarm are
set at the same time, make sure to leave the indicator to “Low Temperature Alarm” position
after all adjustments are performed. Leave the panel untouched for 10 seconds. The unit
enters the locked mode.
E.Simultaneously push “Function Selection” key and down arrow key for 5 seconds. The
temperature display shows the time delay to be “01” for 1 minute for the high stage compressor
to start after power up. This delay can be changed by pushing the up or down arrow keys to
change the value from 1 minute to 10 minutes.
Your freezer is equipped with a rechargeable battery controlled by a power switch. Before
operating the freezer, this switch must be turned on. Once the unit is plugged into the specified
voltage, the unit operates to charge the battery. When there is a power outage, the battery
sustains the temperature display. If the battery voltage is less than a threshold, the
temperature display turns off. While the battery is still capable of providing power to the display,
the temperature display can be turned off by unplugging the power cord and turning off the
battery control switch.
3.2Battery
To reduce the risk of equipment failure that might result in loss of property, please follow the
application guidelines.
1.The unit should not be located in a small space. Should a failure occur, a small space hinders
any on-site repair work, and prevents quick removal of stored products.
2.The freezer should be taken care of by a dedicated person. The freezer should be inspected
daily, and its temperature should be recorded every 2 to 4 hours each day. When there is a power
outage or a failure, the freezer temperature starts to warm up. If the situation cannot be corrected
within a short period of time, move the stored products to another unit with proper temperature to
minimize property damage.
3.Before any product is loaded into the unit, check the storage temperature specification. It needs
to match this freezer's set temperature. If there is a discrency between the requirement and the
actual temperature, potential property damage can be resulted.
Due to the nature of mechanical refrigeration, it is normal that there is a temperature difference
between the actual unit temperature and the set temperature .
1.
User's
manual
1.Remove all packing
materials
2.Check all accessories
included in the packing
list and make sure all are
accounted for.
3.See section “Cleaning”
for cleaning the unit
Leave the unit standing in its intended location for at least 24 hours before switching the
power on. Turn on the switch for charging the backup battery. This switch is located on
the back of the machine as can be seen in Picture 4. Viewed from the back of the unit, the
switch is installed on the electrical box. If this switch is not turned on, the low charge
battery alarm would be on.
Set the unit temperature to -40 when the unit is initiated. Let the unit run for 8 hours.
Then Change the temperature setting to -70 and let it run for 24 hours. After 24 hours,
change the setting of the freezer to the desired temperature. Leave the unit in operation
status after desired temperature is reached. If there is no abnormality, the initiation
process with the unit is completed.
Load the unit with a small amount of frozen materials that have been previously stored at -
40 and below. Set the temperature of the unit to 3 warmer than the material
temperature. Let the unit run for 8 hours. Then load the unit with batch method. Each
load should not exceed one third of the freezer's capacity. Between each loading, let the
unit operate at set point temperature for 24 hours. To avoid warming up of the products,
do not open the unit's door during the cool-down process.
When the ambient temperature exceeds 28 , turn on the air conditioning unit or open
windows and doors to reduce the environmental temperature. If the ambient temperature
rises above 32 , the control logic of the unit would activate the auto-protection program
which limits the temperature set point to maximum point of -82 . The length of time to
operate the unit at this condition should be less than 10 hours. When the ambient is above
33 , do not operate the unit as the compressors may be subject to burn out.
This unit is designed for storage of laboratory materials. It is not suitable for high
refrigeration demands such as in a production line.
Always make sure that appropriate materials are stored. Do not load warm products into
the unit.The extended operational time may damage the compressors. Materials should
be loaded into the unit using batch loading method until the desired temperature is
reached.
The unit should be operated based on the above recommendation for longevity.

ULT FREEZER
SET
Silence
Note
A routine maintenance of cleaning
the filter every two or three months
should be conducted to ensure a better
working performance ,especially before
summer.
The control panel is mounted on the door of the unit.
The following diagram depicts the control panel display.
Funtion and operating instructions of the control panel
1.Panel Display
1.1 Work status
A. Locking Indicator
B.Network Indicator
C.Operating Indicator
D.Voltage Regulator
E.Backup System Indicator
1.2Alarm Indicator
A.High Temperature Indicator
B.Low Temperature Indicator
C.Abnormal Voltage Indicator
D.High Ambient Temperature
E.Sensor Failure Indicator
F.Power Failure Indicator
G.Dirty Condenser Indicator
H.Low Battery Indicator
This signal indicates the equipment control is in the locked mode.
This is to prevent mistakenly operating the unit control.
This signal indicates that the equipment's network system is in
good working order.
This signal indicates that the equipment is in good working
condition.
This light indicates that the voltage regulator is either boosting or
bucking the voltage.
This signal indicates that the backup system is in work condition.
When a failure develops on the unit during its operation, the alarm on the system will sound.
When this indicator is on, the unit's temperature reaches
the warm alarm limit.
When this indicator is on, the unit's temperature reaches
the cold alarm limit.
When this signal is on, the unit's supply voltage is
beyond the normal range.
When this signal is on, the surrounding ambient is
higher than 32 .
This signal suggests there is a failure associated with
temperature sensors. The temperature display will alternate displaying the sensor temperature
and the failure code. The failure code for heat exchanger sensor is E3, the failure code for
main control sensor is E2, the failure code for condenser sensor is E1, and finally, the failure
code for the ambient sensor is E0.
When this signal is on, it suggests there has been a power outage.
If this light is turned on, it means the condenser filter is
blocked with dirt. It must be cleaned for the proper operation of the unit.
When this light is turned on, the battery light is at low capacity.
The charging process starts automatically if the unit is powered up.
Operating
Voltage Regulator
Please note that a flashing alarm light cannot be canceled unless the root cause for the alarm is
eliminated. The buzzing alarm can be temporarily silenced for 30 minutes by pressing the alarm
silence button. However, if the problem is not fixed, the buzzer alarm will resume after 30
minutes.
When the unit is first setup to operate, the security code to unlock the control is “06”. After
unlocking the unit, simultaneously push “Function Selection” and “Buzzer Cancel” for 5
seconds. The display will show 06. Use the up and down arrow keys to change the security
code. The choices are 05, 06, 07----29, and 30. After a number is chosen, do not touch the
unit for 5 seconds. The control system will enter locked mode. The new code is effective.
When the unit is in the locked mode, all keys are in the locking mode. This is to prevent the
unit from mis-operation. To adjust the control, the keys must be unlocked first. The procedure
is as follows. Push the up arrow, the temperature display flashes. Push the up or down arrow
again to change the display to security code (the initial value is 06). Push the “Function
Selection” key for 3 seconds. The locking sign turns off. This means the unit is in unlocked
mode. Push the “Function Selection” key again to show the temperature set point value, high
temperature alarm value and low temperature alarm value.
Push the “Function Selection” key. Once the interior
temperature setting indicator is on, the temperature display area flashes. To change the
temperature of unit, push the up and down arrow intermittently to increase or decrease the
temperature setting by 1 . To rapidly increase or decrease the temperature setting, keep
pushing the up or down arrow . After the adjustment is done, do not make any further
changes for 10 seconds. The temperature display stops flashing. The unit enters the locked
mode.
Push the “Function Selection” key to turn on
the “high temperature alarm setting” light. The temperature display flashes.To change the
high temperature alarm of unit, push the up and down arrow intermittently to increase or
decrease the temperature setting by 1 . To rapidly increase or decrease the temperature
setting, keep pushing the up or down arrow. After the adjustment is done, do not make any
further changes for 10 seconds. The temperature display stops flashing. The unit enters the
locked mode. When the freezer temperature is warmer than the high temperature alarm set
point, the unit's alarm sounds, and the high temperature alert light flashes. High temperature
alarm set point can only be set to a value of at least 5 warmer than the set point
temperature of the unit.
Push the “Function selection” key to turn on
the “low temperature alarm setting” light. To change the high temperature alarm of unit, push
the up and down arrow intermittently to increase or decrease the temperature setting by 1 .
To rapidly increase or decrease the temperature setting, keep pushing the up or down arrow.
After the adjustment is done, do not make any further changes for 10 seconds. The
temperature display stops flashing. The unit enters the locked mode. When the freezer
temperature is colder than the low temperature alarm set point, the unit's alarm sounds, and
the low temperature alarm light flashes. The low temperature alarm set point can only be set
to a value of at least 5 colder than the set point temperature of the unit.
2.Selection of Security Code
3.Adjustment of Control Panel
3.1Function Selection
A.Freezer temperature set point
B.Setting of high temperature alarm
C.Setting of low temperature alarm