LG LMX25964 Series Service Manual

12-4 Check D
DI. Activate Protection logic Cycle check with protection logic
- We have to check Condenser fan and Freezer fan before performing Check D
- Locked Piston, Current trip and stroke trip can be activated by other problems then the driver or compressor.
High Pressure
Side
Restricted
_-_When process tine on compressor is opened, and refrigerant is not expetled
because it has accumulated in condenser.
_-_ If fauk is corrected after refrigerant is recaptured from sealed system, change
dryer.
I Locked piston
I Stroke trip
I Current trip
Low
Side
Restriction
Over charging ]_I
Refrigerant
Low side ]_
Refrigeration
leak
Refrigerant leak _
_-_Low side restriction can cause a stroke trip.
_-_ If fault is corrected after refrigerant is recaptured, perform a sealed
system evacuation and dryer replacement.
--_ Check Suction Line
---* If refrigerant is overcharged and suction line temperature is lower
than ambient temperature (about 5-10 degrees) or frost is present
150mm from where the suction line enters the compressor..
Temp. of compressor and discharge line is normal to stightly higher.
High side pressure is normal to slightly higher than normal
conditions. This is because condenser cannot condense the air
that is trapped in the condenser. The high side pressure and
temperature will not mimic the low side pressures and
temperatures.
-_ Customer complains of longer run times and poor cooling performance.
--_ Lack of refrigerant can, in some incidents, cause piston over travet.
--_ Pressure of refrigerant cycle is usually higher than ambient pressure,
therefore oit will flow out with the refrigerant at teak point.
D2. sealed system diagnosis
- Check as follows;
Sealed system
Repair leak
at point where _____
i Check Temp of
Discharge line I
and Condenser I
/
) No
I Sealed System t
i
In/Out Leakage
Evaporator !--_
Leakage
o_ Frost onl_ 1
Check frost status Evaporat
Of Evaporator Heat Inlet tubing
N using heat gun.
IsealedSystemI
_ Heaw repair i
- 58 -
Welding point
1. Comp process stub,
2. Comp discharge
3. Hot Line inlet
4. Drier inlet
5. Drier outlet
6. Evaporator inlet
7. Evaporator outlet
8. suction pipe

LG LMX25964 Series Specifications

General

Brand	LG
Model	LMX25964 Series
Category	Refrigerator
Language	English