What does LG CH87 mean?
LG Multi V 5 commercial VRF CH87 is listed as master outdoor unit: Outdoor fan-PCB EEPROM error, slave 1 outdoor unit: Outdoor fan-PCB EEPROM error, and slave 2 outdoor unit: Outdoor fan-PCB EEPROM error in VRF, Cassette, Ducted rows such as LG Multi V 5 commercial VRF. This meaning comes from the manufacturer's own diagnostic material. Use the complete display code and its final digit - 1 for master, 2 for slave 1, or 3 for slave 2 - to choose the reporting outdoor frame before parts are quoted. Confirm the complete display code and whether its final digit identifies the master, slave 1, or slave 2 outdoor frame before accepting a parts quote.
What to do now
Use these steps before customer action or a parts quote.
Stop using the unit if CH87 returns
If CH87 remains displayed or returns during operation, do not attempt a reset the manufacturer does not list; arrange diagnosis.
No manufacturer reset steps listed for CH87
Capture the complete CH87 display and model stickers first. The manufacturer lists no customer reset procedure; do not treat a generic power-cycle as manufacturer guidance.
Send these to us
CH87 error code, a clear display photo, LG Multi V 5 commercial VRF model stickers, affected rooms, and operating state when the code appeared
Choose the listing that matches your unit
The same code has more than one listed meaning. Match the model family, the system type and the unit that shows the code before approving parts.
| Code | What it means | What to check first |
|---|---|---|
| 871 | master outdoor unit: Outdoor fan-PCB EEPROM error | Use the complete 871 display shown by the master outdoor unit. |
| 872 | slave 1 outdoor unit: Outdoor fan-PCB EEPROM error | Use the complete 872 display shown by the slave 1 outdoor unit. |
| 873 | slave 2 outdoor unit: Outdoor fan-PCB EEPROM error | Use the complete 873 display shown by the slave 2 outdoor unit. |
- Code
- 871
- What it means
- master outdoor unit: Outdoor fan-PCB EEPROM error
- What to check first
- Use the complete 871 display shown by the master outdoor unit.
- Code
- 872
- What it means
- slave 1 outdoor unit: Outdoor fan-PCB EEPROM error
- What to check first
- Use the complete 872 display shown by the slave 1 outdoor unit.
- Code
- 873
- What it means
- slave 2 outdoor unit: Outdoor fan-PCB EEPROM error
- What to check first
- Use the complete 873 display shown by the slave 2 outdoor unit.
Guidance for your model
Notes that match the code to your exact model. Electrical, refrigerant, wiring, resistance and component checks are for a technician.
| Detail | What it says |
|---|---|
| Diagnostic note | Record 871 and confirm that the master outdoor unit reported it. Isolate the system through a qualified technician and verify the relevant supply, wiring, inverter, PCB, and compressor path against the installed model manual. |
| Diagnostic note | Record 872 and confirm that the slave 1 outdoor unit reported it. Isolate the system through a qualified technician and verify the relevant supply, wiring, inverter, PCB, and compressor path against the installed model manual. |
| Diagnostic note | Record 873 and confirm that the slave 2 outdoor unit reported it. Isolate the system through a qualified technician and verify the relevant supply, wiring, inverter, PCB, and compressor path against the installed model manual. |
| Singapore / model note | LG Singapore lists Multi V 5, but the installed unit nameplate and matching service manual control. Do not apply this row to Multi V i or another LG family. Electrical limits vary by model and supply. Use the installed Singapore supply and model data rather than thresholds from another market. |
- Detail
- Diagnostic note
- What it says
- Record 871 and confirm that the master outdoor unit reported it. Isolate the system through a qualified technician and verify the relevant supply, wiring, inverter, PCB, and compressor path against the installed model manual.
- Detail
- Diagnostic note
- What it says
- Record 872 and confirm that the slave 1 outdoor unit reported it. Isolate the system through a qualified technician and verify the relevant supply, wiring, inverter, PCB, and compressor path against the installed model manual.
- Detail
- Diagnostic note
- What it says
- Record 873 and confirm that the slave 2 outdoor unit reported it. Isolate the system through a qualified technician and verify the relevant supply, wiring, inverter, PCB, and compressor path against the installed model manual.
- Detail
- Singapore / model note
- What it says
- LG Singapore lists Multi V 5, but the installed unit nameplate and matching service manual control. Do not apply this row to Multi V i or another LG family. Electrical limits vary by model and supply. Use the installed Singapore supply and model data rather than thresholds from another market.
What to check before repair
Use this split to separate safe evidence capture from the tests a technician should prove before quoting parts.
| You can check | Technician should confirm |
|---|---|
| Before taking any system action on CH87, take a clear display photo. | Confirm which PCB or board input CH87 points to for your model. |
| Capture the LG Multi V 5 commercial VRF indoor and outdoor model stickers so the correct family row is used. | Check power supply, fuses, connectors, wiring, and board indicators. |
| The manufacturer lists no customer reset procedure for this code. Note whether one room, several rooms, or the whole system is affected. | Rule out water ingress, surge damage, and connected component faults before replacing the board. |
- You can check
- Before taking any system action on CH87, take a clear display photo.
- Technician should confirm
- Confirm which PCB or board input CH87 points to for your model.
- You can check
- Capture the LG Multi V 5 commercial VRF indoor and outdoor model stickers so the correct family row is used.
- Technician should confirm
- Check power supply, fuses, connectors, wiring, and board indicators.
- You can check
- The manufacturer lists no customer reset procedure for this code. Note whether one room, several rooms, or the whole system is affected.
- Technician should confirm
- Rule out water ingress, surge damage, and connected component faults before replacing the board.
PCB repair or replacement decision
LG Multi V 5 commercial VRF CH87 should not jump straight to board replacement. Confirm power, connectors, wiring, and connected parts before deciding whether PCB repair or replacement is justified.
Power, fuse, connector, and water-ingress checks should happen before board replacement.
Connected motors, sensors, or valves can damage or confuse a PCB diagnosis.
Board availability and system age decide whether replacement is sensible.
LG CH87 questions
What does the LG CH87 error mean?
Can I fix a LG CH87 error myself?
Is it safe to keep running the aircon with a CH87 error?
What causes a LG CH87 error?
Will a LG CH87 error need a repair or a full replacement?
What should I send a technician about a LG CH87 error?
Where to go next
Confirm the fault
Share the error code, model number and symptoms so we can assess the likely cause.
Not the right code?
Browse the full LG list or check a few codes in the same fault category.
Read next
Use these if the quote mentions the parts, checks, or repair path this code points to.