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SERVICING PRECAUTIONS
AIR RECHARGING
IN COMPRESSOR
Test the re_geration
system connecting it electrically before
refilling operation. It is necessary to ascertain the function
of the motor-compressor
and identify the defects
immediately. If defects have been found, empty the old
system of possible R-134a residue by breaking off the end
oftha extension piece at its narrow point. (Figure 1)
Replace the filter and any damaged
components.
Unsolder
and pull off the piece remaining inside the service tube and
then attach an complete extension with male Hansen and
at last, solder it to the same tube again. (Figure 2)
POINT TO BE BROKEN
SERVICE TUBE EXTENSION
Figure
1
CHARGETUBE
FEMALE
EXTENSION
HANSEN
MALE HANSEN
SOLDERING POINT
Figure
2
It is necessary to execute the soldering operation with
valve open so that the fumes caused by oil residue can
come out freely without blowholes
between two tubes
during the heating the of the point to be soldered.
The extension fitted with the male Hansen is connected to
the female fitting of the vacuum pump tube. (Figure 3)
THE
.
VACUUM
PRESSURE
GAUGE
Air evacuating
from the system begins as soon as the
pump starts. The refrigeration
system must be kept under
vacuum untti the reading on the low-pressure
gauge
indicates
vacuum (0 absolute, -1 stm., -760 mm hg). In any
case it is advisable
to keep the pump running for about 30
minutes. (Figure 3)
If considerable
leakage occurs, it will be necessary to stop
the vacuum pump and to add a small quantity of Freon to
the system, ff vacuum should not be obtained (pressure
gauge can't fall to 1 atmosphere),
start the refrigeration
unit and find the leakage with special leak-finder. When the
defective soldering point is visible, repair it after opening
the extension tube valve and reestablishing
the normal
outside pressure inside the group.
Because the melted alloy is sucked into the tubes and
bicoks them, the pressure must be rebalancod
when
vacuum is in the system when soldering. As soon as the
vacuum operation
is over. add the quantity in grams of
R-134a to the refrigeration
system. Remember
that every
system has an exact quantity of R-134a that can be added
with a tolerance of +-5grams. (Figure 4)
TO THE R-134a CYLINDER
_
_
TOTHE REFRIGE_T_ON
SYSTEM
_-_
t
Figure
4
Before performing this operation (if the vacuum pump and
refilling cylinder are connected), make sure that the valve
placed between the vacuum pump and the refilling tube is
closed in order to keep the Freon for addition to the system.
(Figure 5)
FILLING OR
VALVE TO BE OPENED
CHARGE TUBE
WHEN REFILLING
TO THE REFRIGERATION
TO THE CHARGE
SYSTEM
CYLINDER
VALVE TO BE CLOSED
AFTER VACUUM
TO THE
VACUUM
_
Figure
5
PUMP
In addition, check the graduated
scale on the cylinder for
the quantity of R-134a to be added, for example, if we
have 750 grams of Freen in the cylinder and must add 140
grams to the group, this amount will be reached when
R-134a has dropped to 610 grams, remembering
that the
indicator shows a lower limit of meniscus.
Do this after
choosing the scale corresponding
to the gas pressure
different scales reported as the same gas pressure
indicated by the pressure gauge on the top of the column.
To make R-t34a flow into the system, open the valve
placed at the base of the cylinder connected to the filling
tube. The amount of Freen cannot be added to the system
all at once because it may cause a blocking of motor-
compressor.
Therefore, proceed by adding the original
quantity of about 20-30 grams and close the valve
immediately.
The pressure rises and the motor compressor
must start
sucking the gas and Iowedng the pressure again. Open the
valve again, maintaining the same manner until reaching to
the quantity of R-134a established
for the system being
charged. When the system is running, the suction pressure
must be stabilized
between 0.30 to 0.6 (0.10 to 0.4)
atmosphere.
-3-
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Related Manuals for LG LRTPC2031T precautio
Summary of Contents for LG LRTPC2031T precautio
- Page 1 SERVICING PRECAUTIONS AIR RECHARGING IN COMPRESSOR vacuum operation is over. add the quantity in grams of R-134a to the refrigeration system. Remember that every Test the re_geration system connecting it electrically before system has an exact quantity of R-134a that can be added refilling operation.
- Page 2 160/120 CIRCUITDIAGRAM WATER 8 1,'FPLYING TIE CONI_OL OImON ..b' CAUTION :flue mplug lllll polar_i_ fcmlhl wall o ulW. ;A i ! ]lliGi_IIiW "'!'.i iI __--- .il'..i_ :_71 !I - JI Siall;tl No TIME iiil wi.i ,,,+,.,,,+,._...+._. :,,_a _-_Iil! 10,5 9 86_ o!u.
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Page 3: Parts Identification
2. PARTS IDENTIFICATION FREEZER COMPARTMENT Freezer Shelf Lamp Automatic Ice Maker Ice Cube Box Freezer Door Bin Freezer Temperature Door Cooling Control Dial On the refrigerator door, the cold air passageway is REFRIGERATOR installedto supply COMPARTMENT cold air to the doorside of the refrigerator Temperature compartment. - Page 4 3. DISASSEMBLY 3-1 DOOR 3-2 DOOR SWITCH • Freezer Door 1. To remove the door switch, pull out it with a slotted type 1. Remove the hinge cover by pulling it upwards. driver as shown in (figure g). 2. Disconnect the lead wire from the switch. 2.
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Page 5: Refrigerator Room Lamp
3-6 LAMP 3-4 FAN AND FAN MOTOR 1. Remove the freezer shelf. (If your refrigerator have an Ice Maker, disassemble the Ice maker first) REFRIGERATOR ROOM LAMP 2. Remove the grille by pulling it out and by loosening a screw. 3. - Page 6 4. ADJUSTMENT 4-1 COMPRESSOR 4-2-3 PTC-Appltad Circuit Diagram 4-1-1 Role • According to Starting Method for the Motor The compressor intakes low temperature and low pressure gas evaporated from evaporator of the refrigerator, OVERLOAD PROTECTOR(O.L.P) condenses this gas to high temperature and high pressure gas, and then plays delivering role to condenser.
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Page 7: Circuit Diagram
4-30LP (OVERLOAD PROTECTOR) CONTACTING 4-3-1 Definition of OLP POINT COVER (1) OLP (OVERLOAD PROTECTOR) is attached to the Compressor and protects the Motor by cutting the current to the Motor if the temperature rises and activates the bimetal spring in the DLP. (2) When over-voltage flows to Compressor motor, the Bimetal works by hea_ing the heater inside the OLP, and the OLP protects Motor by cutting off current which... -
Page 8: Troubleshooting
6. TROUBLESHOOTING 6-1 COMPRESSOR AND ELECTRIC COMPONENTS Remove the PTC- Starter from the I Power Source. (Rating Voltage ±10%)? "[_ Compressor measure the voltage between Terminal C of Compressor Terminals 5 or 6 of PTC. No Voltage. OLP disconnected? Replace OLP. condition. -
Page 9: Defrost Timer
6-2 PTC AND OLP Observation value is Separate the PTC- Normal operation of Compressor Starter from 220V/50Hz : 22_30% Check another electric components. impossible or poor. Compressor 115V/60Hz : 6 8_,E1:30% measure the 240V/50Hz : 33.(Z_30% resistance between 127,220VI60Hz : 22_) No. -
Page 10: Other Electric Components
6-4 OTHER ELECTRIC COMPONENTS • Cooling is impossible doesn't run. the following ] Oompressor I =;> Oheok,foo_nt,owsto Cees components. a. Thermostat _ Poor contacting gas leakage. b. Starting devices =-_Shorted or broken. Poor contacting c. OLP _- or shorted. d. Compressor coil _-- _oil shorted, Replace... -
Page 11: Service Diagnosis Chart
6-4 SERVICE DIAGNOSIS CHART COMPLAINT POINTS TO BE CHECKED REMEDY Cooling is • Is the power cord unplugged from the outlet? • Plug to the outlet impossible • Check if the power S/W is set to OFE • Set the switch to ON. •... - Page 12 6-5 REFRIGERATING CYCLE • Troubleshooting Chart TEMPERATURE CAUSE STATE OF STATE OF THE REMARKS OFTHE THE SET EVAPORATOR COMPRESSOR PARTIAL Freezer Low flowing sound of A little higher * Refrigerant level is low due LEAKAGE compartment and Refrigerant is heard and than ambient to a leak.
- Page 13 • General Control of Refrigerating Cycle ITEMS UNIT STANDARDS REMARKS PURPOSES Min. Pipe and Pipe: within 1 hour. To protect The opening time should be reduced moisture piping system Comp: within 10 minutes. to a half of the standards during rain Dder: within 20 minutes.
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Page 14: Operation
7. OPERATION PRINCIPLE AND REPAIR M ETHOD O FICEMAKER This manuel describes function of models adhering Ice Maker. 7-1 OPERATION PRINCIPLE 7-1-1 Operation principle of Ice Maker • Keep a level of ice-removingtray with "initial control" inputting Initial Control power. Wait until when water within ice-removing tray becomes cold Icing... - Page 15 7-2Function o f Icemaker 7-2-1 Initial control function 1. The level of the ice*removing tray (ice-removing container) after completing the MICOM initialization in the initiel POWER ON,returning to electricity failure and turning-oft of ice-making stop switches. Namely, detection lever operates up and down. 2.
- Page 16 7-2-4 Ice-removing control function 1. ice-removing control means operation to separate ice within ice-making tray ( ice-making container) after ice-making is completed. 2. Step to check ices stored at the ice bank (container for storing ice) are fully filled. It is considered as they are fully filled if signals of the hall sensor are at the On status ("high") before 3.6seconds after rotating positively the ice-making motor.
- Page 17 7-2-5 Test Function 1. Function used compulsory operation for the purpose of performing operation test, service and cleaning. This test function is performed if pressing the test switch mounted on the automatic ice-maker itself for 0.5 second or more. 2. The test button operates when the test function is not input but at the level status.
- Page 18 7-3 Failure diagnosis method of ice maker Replacement of Defect of power terminal MAIN PCB • Check DC power (5V,12V) Defect of ice-making sensor Replacement of ice-making sensor • Check resistance values of both ends of ice-makthg sensor (Pin for PCB CON2 1,2 PIN) •...
- Page 19 7-4 Explanation of ice maker circuits 7=4-1 Power circuit CON! . F- _ zBI (MICOM) lEST The secondary party of transformer consists of power (12Vdc) for driving display and relay and power (5Vdc) supplying power to MICOM and IC. In this case, voltage at each part is as follows: Part Both ends of VA1 Both ends...
- Page 20 7.4-4 Load drive circuit 1. Load drive status check CON1 GSN-1A (P_R) (MICOM) _/" _2J_i _--- KRAIO6M Load Type Water Valve Measurement Location 1V below Condition - 22 -...
- Page 21 7-4-5 ICE MAKER drive/circuit CON2 (REVERSE) /25V (S_AISO) (FQR_/AR_) MOTOR BA6222 8 _ICE MAKER 223/100V (_ICOM) ICE MAKER TEST S/V cclo/ ° 104 ,_ 6,2KF- T"° T--_n (_N7) ICE MAKER SENSOR This circuit is a circuit used to embody functions such as ice-removing, full-ice detection, level noise, and ice-making tem- perature detection of ice-making tray (ice-making container).
- Page 22 7-5 Main PWB Assembly and Parts List 7-5-1 MAIN PWB - 24-...
- Page 23 7-5-2 Replacement Part List NC_ _E_C_p_oN CAKER _70a6203_ >_,MNN _-1(05-1107A O0 S;_ t=1,6 ;170JB2002 rRi_ pc8 __:117V'G:15\ _SjI ( _RAN S _aOJE_OOIB I_-I_L_L_.4 CON1 WAFER _30J_ _M_Z_U--UZ :CON2 430JBeO640 _44 V CZSO-- 04 iCON3 IZZJ_ _COi4 OlP _!tP87C40_ 0_tl61 C1(=0041_ E_JI_T_ 1_178120AE_JL*.TOt;I1)BA17812"...
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Page 24: Pwb Diagram
7-6 PWB DIAGRAM ,.,,. -rfi, 2eCON Vows lEST _._- r --_ ',,_I,_,K: (ICE) XOUT RESET - 26-... - Page 25 4.7'KX2 /25V CON2 (REVERSE) (SDA/SC _ICE MAKER HOTOR ICE MAKER --L+ TEST CC10_- 104/77T CC11 .._ 104 ,_ 6,2KF ICE MAKER SENSOR CC12_- CONI01 (WATER SUPPLYING TIME S/_/) CONTROL 4.~10,12.13,16,24,25,28 - 27-...
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Page 26: Exploded View And Replacement Parts List
8. EXPLODED VIEW & REPLACEMENT PARTS LIST • The parts of refrigerator and the shape of each part are subject to change in different localities. • Capacitors and fuse are optional parts. GR-T622, GR-T722 - 28 -... - Page 27 - 29-...
- Page 28 _ _aa°nk_ eAss°mb_yl m 30 1...
- Page 29 ICE MAKER PART & - 31 ÷...