Error No. 24 - LG Multi V5 Service Manual

Please refer to the Safety Precautions on pages 4-7 for more detail to prevent injury or death regarding the operation and service
WARNING
troubleshooting of the Multi V product.
Error No. Description
24
System has been
turned off by the
Master: 241
outdoor unit high
Slave 1: 242 pressure switch.
Slave 2: 243
Is the high pressure
switch connected to
the PCB?*
Yes
Has the high pressure
switch shorted out when the
system wasn't operating?**
Yes
Is the service valve open?
Yes
Does the error reappear
after the system is reset?
Yes
Is the high pressure
>2500 kPa (measured at
the manifold gauge)?
Yes
Does the high pressure
measured at the manifold
gauge match LGMV data?
Yes
Check if piping is blocked
and fix as necessary.
Details
Outdoor unit high pressure switch
error. Excessive increase in
outdoor unit compressor discharge
pressure.
No
Securely connect.
Has the high pressure
No
switch terminal shorted
out?**
Yes
Replace connection cable.
No
Open the service valve.
No
Recheck--was the problem
temporary?
Replace PCB.
No
Error CH24: Inverter Compressor
PCB.
Error CH109~154: Sub-unit PCB.
No
Replace the high pressure sensor.
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components. Actual component appearance
depends on model and system type.
Due to our policy of continuous product innovation, some specifications may change without notification.
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ERROR CODES
Causes
1. Outdoor unit high pressure switch is defective.
2. Indoor unit fan or outdoor unit fan is / are defective.
3. Compressor check valve is clogged.
4. Pipe has been damaged.
5. Overcharge of refrigerant.
6. Defective EEV at the indoor or outdoor unit.
7. Outdoor unit is blocked during cooling mode; indoor unit
filter is clogged during heating mode.
8. Service valve is clogged.
9. Outdoor unit PCB is defective.
10. Check connection on the outdoor unit PCB.
11. Active path valve is defective.
12. Use chart in Troubleshooting section of the manual to
check signal output (V DC) versus actual pressure.
No
Replace high pressure switch.
*High pressure switch
connection on Main PCB.
**Check if the high pressure switch
connection has shorted out.

Error No. 24

149