Haier DW-40L508 Options, After-sales service, Calibration and adjustment of the recorder

Operation Steps and Precautions for the Low-temperature Freezer

Options After-sales service

1.Remove the backup battery (9V DC), if the LED goes out and the recorder stops working, it means that the recorder’s main power supply goes wrong. In this case, please check for power failure, short circuit and loose connecting wire, etc. If the main power supply is in good condition after repair, the recorder will work normally. Then install the backup battery in place, if the LED stops flashing, it means that the backup battery is normal; if the LED goes on flashing, it means that the backup battery is at low charge level and needs replacement until the green LED lights up and does not flash.

2.Remove the backup battery, if the LED goes on flashing and the recorder works normally, it

means that the main power supply is normal and the backup battery is at low charge level and needs replacement until the green LED lights up and does not flash.

Change of recording paper Change the recording paper as follows:

1.Find out the “Press” button (3#) in the upper left corner on the recorder’s front panel.

2.Press and hold this button (3#) for about 1s until the recording pen starts moving towards the left of recording paper.

3.When the recording pen entirely moves out of the recording paper, loosen the center bolt and change the used recording paper with a piece of new recording paper by carefully aligning the time line on the paper with the time slot on the panel (there is a small slot on the left of panel. Please see the attached figure).

4.Retighten the center bolt, then press and hold the button (3#) to make the recording pen reset and start recording temperature.

5.Check whether the recording pen writes well on the paper or not. If not, you may adjust its beam to make the penpoint contact with the recording paper. (Note: Do not damage the penpoint and beam. If it is difficult to adjust, you may remove the beam with a screwdriver, bend it with a little force and reinstall it in place by repeating the above operations).

6.To ensure the recorder’s accurate recording, please calibrate the recording pen after each paper change as follows: press and hold the button (3#) until the recording pen moves out of the recording paper, then press and hold the button (3#) again until the recording pen return to the recording paper, at which time the pen will pause at the outmost temperature graduation mark on the recording paper (this graduation mark is not necessarily with temperature value, but it must be the outmost graduation mark). If the pen does not pause in this position, you may adjust its position by using 1# or 2# arrow within 5s to make the penpoint align with the

outmost graduation mark. If you don’t finishing the adjustment of pen within 5s, please repeat step 6.

Calibration and adjustment of the recorder

The recorder has been accurately adjusted before leaving the factory and will not be affected even if power interruption. If it indeed needs adjustment, please do as follows:

1.Keep the freezer operating continuously and then make it record the temperature curve for at least 2h after it enters stable state (the fluctuation of displayed temperature is relatively regular).

2.Put a standard thermocouple in a bottle with about 100ml of 10% glycerite, and then put the bottle and the recorder’s sensor together in the freezer (the recorder’s sensor must not be contact with any solution).

3.The glycerite bottle with thermocouple is stored in the freezer for about 4h. When the temperature of glycerite in the bottle is identical with the freezer’s internal temperature, compare temperature values of the standard thermocouple and recorder, if they are not the same, you may adjust the recorder’s recorded value by using the adjusting buttons on the left (1#) or right (2#) of panel to make it in conformity with the thermocouple’s indicated value.

Note: The recording pen starts moving 5s after the button is released.

Note: The recorder has already been calibrated before leaving the factory; do not adjust it except for special cases.

The freezer is guaranteed for free by our company for one (1) year calculated from the date of purchase (the invoice shall prevail). Main components (including compressor, condenser, evaporator, main control panel and display panel) are guaranteed for free by our company for three (3) years.

Warranty card: when you need common consultation or repair, please contact our local after-sales service center with both warranty card and purchase invoice on hand and keep the warranty card properly.

Unlocking

When the “Lock” indicator lights up, all keys except the “

” key are

Beware

of

locked. Press and hold the “

” key for 5s, the display area for internal

electric

temperature will show F0 and “0” will flash; then press the “

” key, the

shock!

display area for internal temperature will show F1; finally press the “Set”

There

are

key, the keyboard will unlock.

Temperature setting

such

In the unlocked state, press the “Set” key, the display screen will show L0

components

and “0” will flash; press this key again, the display screen will show the

as

control

former

temperature

setting

with the second

digit flashing. Adjust the

freezer to the desired temperature by pressing the “

” key to switch

board

and

the flashing digit and pressing the “

” key to change the value of current

contactor,

flashing digit, and then press the “Set” key to confirm and memorize the

etc.

in

the

temperature setting. Temperature setting range: (-20℃~-40℃)

Precautions

electric

1.

After initial installation or movement, please adjust the legs and

cabinet.

make them rest on the floor to make sure that the freezer will not move

during use, then leave the freezer still for at least 24h before turning it on.

Label for protection against electric shock:

2.

When using the freezer, maximumly control the room

temperature below 28 ℃ (If ambient temperature is above 32 ℃ , the

Warn the user not to open the electric

cooling efficiency will reduce rapidly. Also, if ambient temperature is

cabinet

at random.

above 32 ℃ for a long time, the compressor will be damaged or its

service life will reduce. In this case, it is recommended to install an air

conditioner).

3.

The freezer should use an

independent power socket of the

carrying current above 16A and reliable grounding.

Before power-on, please turn on the

4.

Before power-on, please turn on the battery switch on the electric

cabinet at the back of freezer. If the freezer is to be left unused for a long

battery switch on the electric cabinet at

time, please power off first, and then turn off the battery switch.

the back of freezer. If the freezer is to

5.

Maximumly control the time of each opening within 1min, and

wipe off all ice and water on the door seal before closing the freezer’s

be left unused for a long time, please

doors to ensure high sealing performance.

power

off first, and then turn off

the

6.

To extend

the freezer’s

service life and reduce energy

battery switch.

consumption, it is recommended to set the temperature in the range of -20

℃ ~-40 ℃ on

the

premise

that the safety of items

in the

freezer is

guaranteed.

Label for the use of rechargeable battery:

7.

The freezer is used for the storage of items at low temperature

and not used for quick freezing. It must not be forced to quickly freeze a

Describe the precautions for the use of

large quantity of hot products or large-volume liquid products.

rechargeable battery

8.

If the freezer does not refrigerate in 2-3 hours after power on,

Rechargeable battery switch

please unplug it and contact our after-sales service enter as soon as

possible.

9.

In case of alarm or any

other fault, please clear the fault

Label for the rechargeable battery switch:

according to the prompts on the display panel. If there is no prompt or

Show the position of rechargeable battery

you cannot clear the fault, please do not disassemble the freezer by

yourself but immediately contact our after-sales service center to ask a

switch

qualified maintainer for fault clearance.

Grounding sign

Fault codes are as follows:

High

temperature

E9

Main

sensor

fault

E6

Label for operation instructions and

alarm

alarm

Low

temperature

E10

Ambient temperature

E0

precautions:

alarm

sensor fault alarm

Instruct the user in operation and relevant

Over-high

ambient

E14

Low

battery

charge

E5

temperature alarm

level

or

battery

precautions

switch off

______Haier Group customer service hotline (for the whole

country): 4006-999999