Error No. 34 - LG Multi V5 Service Manual

ERROR CODES

Error No. 34

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
34
Outdoor unit
compressor high
Master: 341
pressure safety
Slave 1: 342
tripped.
Slave 2: 343
156
Details
System shut off be-
cause of an excessive
increase in pressure
at the outdoor unit
that occurred ten (10)
consecutive times.
No
Is the service valve open?
Yes
Are the communication
No
cable and piping
connections correct?
Yes
Is the amount of
No
refrigerant appropriate
to the system?
Yes
Are the fans operating
correctly (indoor fan
No
during heating; outdoor
fan during cooling)?
Yes
Are any components
No
blocked? Heating: indoor unit
filter; cooling: outdoor unit
heat exchanger.
Yes
Is the value of the high
No
pressure sensor the same
as the manifold value?
Yes
Check indoor unit EEV, indoor
unit PCB, and indoor / outdoor
unit installation.
Due to our policy of continuous product innovation, some specifications may change without notification.
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1. Shutdown due to if one compressor's high pressure is >4,000 kPa
(580 psi) for ten (10) seconds.
2. Defective high pressure sensor.
3. Defective indoor unit and / or outdoor unit fan.
4. Refrigerant is overcharged.
5. Refrigerant pipe is damaged.
6. Defective indoor and / or outdoor unit EEV.
7. Outdoor unit is blocked during cooling, or indoor unit filter is
blocked during heating.
8. Service valve is clogged.
9. Defective outdoor unit PCB.
10. Defective indoor unit pipe temperature.
11. Defective indoor unit pipe temperature sensor.
12. Defective hot gas valve.
Open the service valve.
Check and repair communication
cable and piping connections.
Add or subtract refrigerant.
Replace fan components (refer to
Error Nos. 105~107).
Clean indoor unit filter (heating) and /
or outdoor unit heat exchanger
(cooling)?
Replace high pressure sensor.
Causes