Haier Hrf 369aa Service Manual

10  Circuit Diagram  Circuit Diagram   

1  Program Diagram 
 Start T>Ts Read T Stop Read T  T>Ts Ts+Td>t>Ts Ts+Td+2t>T>Ts+Td+t Ts+Td+2t>T>Ts+Td+t Ts+Td+mt>T>Ts+Td+(m-1)t N=Nmax  Ts+Td>t>Ts Ts+Td+t>T>Ts+Td N=Nmax Y Y N Stop N>N2 N>N3 N=N1 N=Nmax-1 N>N4 N=N2 N=N3 N>Nmax-1 T  ---- Factual Temperature 
Ts ----- Enactment Temperature 
Td----- No~Off Extent 
t ------ Temperature Increment 
N-----  Compressor Rotate Speed N1< N2< N3< ……..< Nmax  Program Diagram   

2   
Maintenance Service and Trouble Shooting 
 
1 No cooling 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 Maintenance Service and Trouble Shooting Block by ice or dirty 
things,change filter and change 
refrigerant again.YES
   If compressor
can run naturally and 
temperature raising 
  of condenser is
    very low
YESNO No cooling
   If compressor 
can run after it stop to
 run five minutes and 
    give power.NO
!When charging refrigerant,we must 
notice to make...

3   
2 The compressor doesn’t stop 
 1 The thermostatwas 
set at the coldest position.
2 The ambient temperature is very high or 
the refrigerator is near by heat resource.
3 The door was opened too many 
times or there are more 
fresh food inside.
Check and repair the main 
control panelNOIscooling capacity  
insufficient.
YES YESNO Comprossor doesnt 
stop
Does the refrigerator 
refrgerate?NO
Adjust and instruct 
consumer how to use.NOCheck and repair according to 
the section of Cooling capacity 
is...

4   
3 Cooling capacity is insufficient YESRepair  Does the refrigerant 
leak siowly?.NO    Is the ambient 
temperature low than 
16℃YES
Adjust and instruct 
consumer how to use. Check the therostat is 
correct?Cooling capacity is 
insufficient 
 
 
 
 
 
 
 
 
 Maintenance Service and Trouble Shooting  

5   
4 The compressor doesn’t work 
 Check the therostat is 
correct?Check the power 
source and power 
cord?
 Does the control 
panel has 220V power 
output?Check and repair the 
control panel.
 Does the compressor 
has 220V power 
output?
Check and repair 
compressor and accessory.YESYESNO
Check all cords and 
power cords.    Is the ambient 
temperature low than 
16℃ Does the refrigerated 
room lamp illuminate 
when the door is 
opened? The compressor doesnt 
work.YESNO YESYESNO
RepairAdjust and...

6   
5 Normal Phenomena—Not Troubles for Refrigerators  
 
In a domestic refrigerator, there is not only a complicated electric control  
system, but also a refrigerating system that is difficult to discern whether it 
is in a good working condition. Both the systems are related and affect 
each other. If a certain part of a refrigerator works abnormally .Its 
refrigerating efficiency will decrease ,operation properties will become 
unstable ,or even it cannot be used normally for those serious cases....

7  6 Common Troubles in Refrigerators and Their Remedies 
Causes for troubles occurring in refrigerators are closely related to the 
quality of components and workmanship in assembling by manufacturers 
as whether refrigerators are properly used and maintained .The parameters 
generally used to express the working conditions of a refrigerator include 
the temperature inside the refrigerator ,operation rate ,electric power 
consumption ,noise level ,and other functional indexes .If any one of these...

8  Hums from a fully enclosed aggregate unit is the sound caused by 
overload indicating that the motor cannot be started normally ,meanwhile ,a 
clattering sound can be heard from inside the start relay ,which is produced 
because the start contacts cannot be released normally .A whistling sound 
is caused by the high pressure gas flowing out of the crack of the pressure 
tube inside the compressor ,and clucks are the sound of striking after the 
suspended spring inside the compressor has broken ....

9  ambient temperature ,this means that most meshes of its screen has been 
clogged ,resulting in an obstructed flowing of refrigerant ,thus causing a 
drop in temperature due to throttling . 
d) Feel the temperature of exhaust gas from the refrigerating 
system .the exhaust gas should be very hot and this is the normal working 
state .For those refrigerator with enclosed type of compressor refrigerating 
system, no frost or dew drop will from on the gas suction 
tube ,otherwise ,there is something wrong...