LG Multi V 5 Commercial VRF Aircon CH87 Error Code
Use this LG Multi V 5 commercial VRF CH87 error code guide to capture the fault correctly and see what should be checked before parts are quoted. Read the final display digit: 1 identifies the master, 2 slave 1, and 3 slave 2.
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. The loaded row is source-backed by official 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.
Choose the matching source row
The same visible code has more than one source-backed meaning. Match the model family, system type, or reporting unit 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 for the master outdoor unit source row. |
| 872 | slave 1 outdoor unit: Outdoor fan-PCB EEPROM error | Use the complete 872 display for the slave 1 outdoor unit source row. |
| 873 | slave 2 outdoor unit: Outdoor fan-PCB EEPROM error | Use the complete 873 display for the slave 2 outdoor unit source row. |
- Code
- 871
- What it means
- master outdoor unit: Outdoor fan-PCB EEPROM error
- What to check first
- Use the complete 871 display for the master outdoor unit source row.
- Code
- 872
- What it means
- slave 1 outdoor unit: Outdoor fan-PCB EEPROM error
- What to check first
- Use the complete 872 display for the slave 1 outdoor unit source row.
- Code
- 873
- What it means
- slave 2 outdoor unit: Outdoor fan-PCB EEPROM error
- What to check first
- Use the complete 873 display for the slave 2 outdoor unit source row.
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 an unsourced reset; get the matching source row diagnosed.
No manufacturer reset steps listed for CH87
Capture the complete CH87 display and model stickers first. The selected source row 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
Source-specific guidance
These diagnostic-reference notes help match the code to the exact model. Electrical, refrigerant, wiring, resistance, and component checks are technician work, not DIY steps.
| Source 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. |
- Source 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.
- Source 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.
- Source 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.
- Source 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 on the source row. |
| 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 selected source row lists no customer reset procedure. 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 on the source row.
- 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 selected source row lists no customer reset procedure. 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?
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