DOWNLOAD LG LV-C3681CL_HL / LV-D4881CL_HL / LV-D6081CL_HL Service Manual ↓ Size: 2.24 MB | Pages: 43 in PDF or view online for FREE

Model
LV-C3681CL_HL LV-D4881CL_HL LV-D6081CL_HL
Pages
43
Size
2.24 MB
Type
PDF
Document
Service Manual
Brand
Device
Air Conditioner
File
lv-c3681hl.zip
Date
PREV: LG LV-B1861CL / LV-B1861HL / LV-B1864CL / LV-B1864HL / LV-B2461CL / LV-B2461HL / LV-B2464CL / LV-B2464HL Service Manual

LG LV-C3681CL_HL / LV-D4881CL_HL / LV-D6081CL_HL Service Manual ▷ View online

–33–
Troubleshooting
Problem
Checklist
Remedy List
1. Nothing works
Power supply to unit
Re-set circuit breaker or change fuse
PCB fuse
Change fuse
Interconnecting wiring 
Look for break in cable or loose connection
PCB varistor 
Replace PCB
Transformer Replace 
PCB
2. Power on but system 
Re-set control switch 
Re-set
will not function 
Handset control 
Change batteries ( or hand set )
3. Power on but indoor 
Mode on hand set 
Change function
will not function 
Power on fan terminal (pcb) 
No power check relay, if faulty replace
Evaporator sensor 
If short circuit, replace
Connector plug 
Repair or replace
Motor overload 
Wait to reset and check amps
Faulty motor 
Replace
Evaporator frozen 
Defrost and check filter / gas charge & de-ice sensor
Motor capacitor 
Replace
4. Power on but compressor
Room temp set point 
Adjust on hand set
will not function
Relay on PCB 
Replace relay or PCB
Comp contactor 
If power on contactor coil, replace contactor
Comp overload 
Re set, check amps and set point
Indoor sensor(de-ice ) 
See control functions
Comp internal overload 
Allow comp to cool down, check gas
Compressor terminals 
Check for good connection
5. Power on but outdoor 
De-ice sensor (heating) 
Wait for defrost to terminate
fan will not function 
Ambient temp low 
Check gas pressure
Outdoor sensor 
See control functions
Indoor coil too hot 
Clean filter
Fan relay on PCB 
Replace relay or PCB
Faulty motor 
Replace motor
6. Power on but indoor 
Connector plug 
Replace or repair
manual key will not
Faulty switch 
Replace switch or PCB
function 
7. Power on but indoor 
Connector plug 
Replace or repair
display will not function 
Faulty display 
Replace display or PCB
Reset switch position 
Correct or operate once
8. Indoor up-down louver 
Handset control 
Change function
will not function 
Faulty stepping motor 
Replace
Connector plug 
Replace or repair
–34–
Problem
Checklist
Remedy List
9. Indoor left-right swing 
Handset control 
Change function
will not function 
Faulty swing motor 
Replace
Connector plug 
Replace or repair
Relay on PCB 
Replace relay or PCB
10. Power on but indoor fan 
Handset control 
Change function
lost Hi or Med or Low
Faulty motor 
Replace
speed 
Connector plug 
Replace or repair
3 relays on PCB 
Replace relay
11. Condenser fan short 
Outdoor sensor 
See control functions
cycles on cooling 
Unit location 
Check for air recirculation
12. High discharge pressure 
Indoor sensor faulty 
Replace
cooling cycle 
Dirty condenser coil 
Clean
Gas overcharge 
Reduce charge
Air recirculation 
Move unit
Faulty motor 
Replace
Cap tube blocked 
Replace
16. System not cooling 
PCB relay 
Replace or change PCB
Low gas charge 
Add gas and leak test
17. High suction / low 
Reversing valve sticking 
Replace
discharge pressure
18. Outdoor coil icing up 
Ambient temp low 
Wait for de - ice initiation
Dirty condenser coil 
Clean
Outdoor de - ice sensor faulty 
Replace
PCB faulty 
Replace
Low gas charge (heating) 
Add gas and leak test
19. Indoor coil icing up 
Indoor set point too low 
Adjust temperature
Dirty filter 
Clean filter
Faulty indoor sensor 
Replace
PCB faulty 
Replace
Indoor fan not working
Replace
Low gas charge
Replace
Add gas and leak test
–35–
Exploded View and Replacement Parts List 
1. Indoor Unit 
132100-2
137211
354212
359012-1
359012-2
346810
330870
152302
135802
135303
W49300-2
W49300-1
267110
132100-1
146811
–36–
• Parts List(Indoor Unit)
Model: LV-C3681HL, LV-C3681CL
LV-C3681HL
LV-C3681CL
135303
RETURN GRILLE+FILTER SLIDE
221-0001-006
221-0001-006
R
GRILLE, INLET
3530A90007A
3530A90007A
135802
LOCKING FOR RETURN GRILLE
221-0001-007
221-0001-007
R
DOOR, LOCK
3580A90004A
3580A90004A
W49300-1
FIXTURE (LONG) FOR RETURN GRILLE
221-0001-008
221-0001-008
R
HOLDER, COVER
4930A90005A
4930A90005A
W49300-2
FIXTURE (SHORT) FOR RETURN GRILLE
221-0001-009
221-0001-009
R
HOLDER, COVER
4930A90005B
4930A90005B
152302
FILTER
221-0001-010
221-0001-010
R
FILTER(MECH), A/C
5230A90005A
5230A90005A
137211
FRONT PANEL "W/L CONT. MAJOR"
221-0377-140
221-0377-140
R
PANEL ASSEMBLY, FRONT(INDOOR)
3721A10065A
3721A10065A
132100-1
ASS'Y SIDE FRAME RH.
221-0377-245
221-0377-245
R
FRAME
3210A20047A
3210A20047A
132100-2
ASS'Y SIDE FRAME LH.
221-0377-125
221-0377-125
R
FRAME
3210A20047B
3210A20047B
330870
DRAIN PAN FIBER GLASS
221-0377-498
221-0377-498
R
DRAIN PAN ASSEMBLY
3087A90001A
3087A90001A
354212
DXC-8-52-3(13) "SUCTION 3/4" LVN3621HL
221-0377-998
221-0377-998
R
EVAPORATOR ASSEMBLY, FINAL
5421A90012A
5421A90012A
359012-1
BLOWER WHEEL 144 x 188 x 1/2" - LH. 
661-0601-034
661-0601-034
R
FAN ASSEMBLY, BLOWER
5901A20019A
5901A20019A
359012-2
BLOWER WHEEL 144 x 188 x 1/2" - RH. 
661-0601-035
661-0601-035
R
FAN ASSEMBLY, BLOWER
5901A20019B
5901A20019B
146811
SYNCHRONOUS MOTOR GM-16-24FX44
520-0902-002
520-0902-002
R
MOTOR ASSEMBLY, STEP
4681A20086A
4681A20086A
346810
MOTOR F4-1/8TY-TBT 50Hz
518-0304-156
518-0304-156
R
MOTOR ASSEMBLY, INDOOR
4681A20085D
4681A20085D
267110
REMOTE CONT. W/L S2-110F COOL
-
511-0311-322
R
REMOTE CONTROLLER ASSEMBLY
-
6711A90017A
267110
REMOTE CONT. W/L S2-210FD H/C
511-0311-117
-
R
REMOTE CONTROLLER ASSEMBLY
6711A90017B
-
PART NO.
DESCRIPTION
REMARK
LOCATION NO.
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