Temperature Adjustment and Setting

temperature alarm set point can only be set to a value of at least 5 colder than the set point temperature of the unit. It cannot be set to the lowest temperature limit.

5.Setting the security code: When the unit is first setup to operate, the security code to unlock the control is 06. After unlocking the unit, simultaneously push SET

and Silence for 5 seconds. The display will show 06. Use the and

key to change the security code. The choices are from 05 to 30. After a number is chosen, do not touch the unit for 5 seconds. The control system will enter the locked mode. The new code is effective.

6.Setting the Startup delay timer: In order to reduce the startup power surge after a power outage, your Haier ULT incorporates a startup delay feature. This feature can alter the startup sequence of the compressors in the freezer. After the control is

unlocked, simultaneously push

SET key and

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

or

key to change the value from 1 minute to 10 minutes. The default value for

this delay is 1 minute. If this time delay startup is set at more than 5 minutes, the equipment would take too much time to pull down the freezer temperature. If the power source has sufficient capacity, there is no need to change the default value.

7.Alarm test and low battery test: When the ULT unit is powered up, simultaneously press the "Up" arrow and "Alarm Cancel" buttons for 5 seconds. The buzzer alarm should sound and the alarm indicator should flash. At this condition, the 6 second test procedure starts. If the battery capacity is low, the low battery light indicator will flash 6 times. If the battery is at full capacity, the low battery light does not light up or flash. After 6 seconds, start the unit up. All indicators will light up for 6 seconds without flashing. All electronic display windows will indicate a digit of 8 for 6 seconds. When this is done, all display functions work properly.

12

Display and Alarms

Display and alarm

When the freezer is powered up, the display will show the actual freezer temperature, set point temperature, and current voltage.

The display shows the following indicator lights.

Locked indicator:When the light is on, it means all set values are in the locked mode. This is to prevent erroneous operations.

Network indicator:The indicator suggests that the network is in working mode.

Run indicator:When the light is on, it means the compressors are in working mode.

Regulator indicator:The lit indicator means the voltage stabilizer is in working mode to boost or buck the voltage.

Backup System indicator:The lit indicator means that the backup cooling system is in working mode.

Alarm Conditions

Alarm

Alarm Trigging Condition

Indicator

Buzzer Sound

 

 

 

 

High

When this indicator is on,

Alarm indicator flashes.

Buzzer delays 15

Temperature

the units temperature

minutes to sound

Alarm

reaches the warm alarm limit.

 

intermittently.

Low

When this indicator is on,

 

Buzzer delays 15

Temperature

the units temperature

Alarm indicator flashes.

minutes to sound

Alarm

reaches the low alarm limit.

 

intermittently.

Power Failure

 

Alarm indicator flashes.

Buzzer delays for 1

Alarm

Equipment loses power.

Display shows temperature

minute to sound

 

 

and blank interchangeably.

intermittently.

 

 

 

 

 

 

 

Voltage Improper

Supply voltage

 

Buzzer delay for 1

Alarm

Alarm indicator flashes.

minute to sound

exceeds the high or low limits.

 

 

intermittently.

 

 

 

 

 

 

 

Hot Condenser

1.Condensers filter element

 

Buzzer sounds

is clogged.

 

Alarm

Alarm indicator flashes.

2.Ambient emperature is too

intermittently.

 

 

 

high.

 

 

 

 

 

 

High Ambient

Ambient Temperature

 

When ambient

Alarm indicator flashes.

temperature exceeds

Temperature

exceeds 32 .

38 , buzzer sounds

Alarm

 

 

 

intermittently.

 

 

 

 

 

 

 

 

Main cabinet temperature

Alarm indicator flashes, temperature

Buzzer sounds

Probe Failure

control sensor fails.

display alternates to show E2 and

intermittently.

cabinet temperature.

Alarm

 

 

Condenser sensor fails.

Alarm indicator flashes, temperature

Buzzer sounds

 

 

display alternates to show E1 and

intermittently.

 

 

cabinet temperature.

 

 

 

 

Ambient sensor fails.

Alarm indicator flashes, temperature

Buzzer sounds

 

display alternates to show E0 and

intermittently.

 

 

cabinet temperature

 

 

 

 

Heat exchanger sensor fails.

Alarm indicator flashes, temperature

Buzzer sounds

 

display alternates to show E3 and

intermittently.

 

 

cabinet temperature.

 

 

 

Low battery

Battery capacity runs low or

During the test, the alarm

----

Alarm

battery switch is not turned on.

indicator flashes.

 

 

 

 

 

13

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Haier DW-86L388, DW-86L628, DW-86W420, DW-86L626, DW-86L288, DW-86L386 user manual Display and alarm, Alarm Conditions

DW-86L386, DW-86L288, DW-86L626, DW-86L388, DW-86W420 specifications

Haier's line of biomedical freezers, including the DW-86L628, DW-86W420, DW-86L388, DW-86L626, and DW-86L386, showcases the company's commitment to innovation, reliability, and advanced technology in preserving sensitive biological materials. These models are designed to meet the needs of laboratories, hospitals, and research institutions, providing optimal storage solutions for a variety of critical applications.

The DW-86L628 is recognized for its impressive capacity of 628 liters, making it ideal for facilities that require large storage volumes. It features a temperature range of -10°C to -86°C, ensuring that vaccines, biological samples, and pharmaceuticals are stored under precise conditions. With a powerful refrigeration system and an efficient insulation design, this model ensures rapid cooling and maintains consistent temperatures.

The DW-86W420, on the other hand, balances capacity with energy efficiency. This model offers a slightly smaller design, suitable for environments where space is at a premium. It includes a user-friendly digital display that allows for easy monitoring of temperature and system performance, while also providing real-time alerts for any deviations outside of the set parameters. Additionally, it is equipped with a patented eco-friendly refrigerant, reducing the environmental impact while maintaining high performance.

In the DW-86L388, Haier emphasizes robust safety features. This freezer is engineered with a dual-lock system to prevent unauthorized access, alongside an advanced alarm system that notifies users in the event of power failures or temperature fluctuations. This level of security is crucial for laboratories that manage valuable specimens.

The DW-86L626 is tailored for versatility and comes with adjustable shelving and organization options, allowing users to configure the interior to suit their storage needs. Its peak temperature recovery time is remarkably quick, ensuring that samples remain secure even after door openings.

Finally, the DW-86L386 combines compact design with advanced technology. It is aimed at users with limited space, yet it does not compromise on storage efficiency. The unit is equipped with energy-saving modes, reducing operational costs while ensuring optimal performance.

In summary, Haier's DW-86 biomedical freezer models stand out for their high performance, reliability, and thoughtful design tailored for the rigorous demands of biomedical storage. With an emphasis on safety, energy efficiency, and user-friendly features, these freezers are a smart choice for any facility focused on preserving vital biological materials.