LG ACHH Series Manual page 71

Error number Errors
Compressor dis-
34 charge pressure
(341) excessive
increase
n Failure diagnosis method
Are a communication
line and a pipe connection
normal?
Yes
Is the amount of
refrigerant normal?
[Refrigerant side]
Yes
Is a fan normal? (An indoor
fan when heating, an outdoor fan
when cooling)
Yes
Isn't a heat exchanger
clogged?
Yes
Is the manifold value and
the high pressure sensor value
the same? (Is the high pressure
actually high?)
Yes
EEV check / PCB check
/Installation environment check
Meaning
Error caused by a continu-
ous occurrence of compres-
sor off (10 times) due to a
high pressure increase
No Communication line/
Pipe correction
No
Refrigerant amount correction
Relevant parts check and
No
replacement
No
Heat exchanger shielding removal
Check after replacing PCB
No
High pressure sensor replacement
Main cause of occurrence
1. High voltage sensor failure
2. Fan failure
3. Deformation caused by refrigerant pipe damage
4. Refrigerant over charge
5. EEV defect
6. When shielding
7. PCB defect
8. Temperature sensor defect
9. Hot gas valve defect
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Error code check