Typical Troubles & Solutions And Common Q&A - Haier DW-86L486 After-Sales Service Manual

-------Internal training document for Haier service provider. External disclosure is prohibited --- Classification
③Open the external door by 180º.
After the product enters the door, assemble the front cover of the compartment to its original condition.
Note: The front cover shall be assembled in place. Otherwise, safety and performance problems
might be caused!
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When the freezer is carried, its protection box shall neither be collided nor scratched, and the maximum
inclination angle shall be no more than 45° (the angle with the horizontal direction), so as to avoid the
refrigerating system suffers a failure and its normal use is affected.
13.Typical Troubles & Solutions and Common Q&A
13.1 Typical Troubles & Solutions
A. The displayed temperature is different from the actual testing temperature of the machine:
As our displayed temperature is at some point in the freezer but the temperature detected by the user is
at another point in the freezer, surely they may be different. Furthermore, an error may exist between the
testing tool of the user and our temperature probe;
B. The difference between the upper and lower temperatures in the freezer is too big:
Our machine refrigerates from top to bottom, so the temperature at the top is lower than the temperature
at the bottom, the difference between the upper and lower temperatures is large, the temperature
difference of similar international products is 5~8ºC, and the temperature difference of our products is
basically lower than 6 ºC. Besides, the large difference between the upper and lower temperatures may
also be caused if the door is opened and closed frequently;
C. Why is the voltage increased when the machine is started?
In order to ensure the normal operation of the machine, our machine has the voltage increase and
decrease function. When the voltage of the user is lower than 183V, the machine will not be able to start.
Thus, the user shall check if his circuit is normal;
D. The user sets the temperature as -86 ºC. Why does it rise to -82 ºC?
In order to ensure the service life of the machine, our product will be adjusted back to -82℃ if the set
temperature is lower than -82℃ when the ambient temperature is higher than 35℃ and also return to
the original set value if the ambient temperature is lower than 30℃ according to the design;
E. Why does not the temperature rise quickly when the door is opened? Why does the
temperature of other brands rise slowly?
⑴ The temperature of the ULT freezer is low and much lower than the ambient temperature. Our probe
is more sensitive, so the temperature rises more quickly when the door is opened;
⑵Computer boards and temperature probes of other brands are increased with the slower temperature
return function. Therefore, the temperature rises slowly when the door is opened for the display panel
display the same temperature for a long time with the temperature before the door is opened (e.g.
Meiling products).
F. Why are E0 and other signs displayed?
E2 is displayed in case of the main sensor failure, E1 is displayed in case of the condenser sensor failure
and E0 is displayed in case of the failure of the ambient temperature sensor. Check if the above circuits
are connected correctly. If not, the after-sales service provider shall maintain or replace them.
G. How should I do if the machine moves when the door is opened?
Trundles are installed for moving, locking and supporting the machine flexibly and also realizing the
slight adjustment according to the requirement. After the machine is installed in place, the front two
trundles shall be fixed, so as to avoid moving the machine when the door is opened.
H. Why is it impossible to open the door of the low temperature freezer?
There are two reasons:
First, the difference between internal and external temperatures is big, which causes the door under the
negative pressure. In this case, the user can use a thin sheet iron to insert into the gap between the
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