LG Single A Svc Manual page 76

6.13 Check code Trouble shooting CH23, CH28
Display
Title
code
DC Link
23
Low voltage.
DC Link
28
High voltage
Check Flow Chart
Check the wire
connection.(U,V,W)
Is it normal ?
Yes
Is it normal ?
Yes
Is it normal ?
Yes
Check the input power
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Only for training and service purposes
Cause of error
• 1ph : DC link volt. is
140Vdc .
• 3ph : DC link volt. is
250Vdc .
• 1ph : DC link volt. is
140Vdc .
• 3ph : DC link volt. is
250Vdc .
❊ Check DC link voltage
❊ Check TRANS1
No
Correct
connection
No
Change
Compressor
❊ Dc link voltage table
No
Change
1 Phase AUUW243D[LUU245HV]
Compressor
- 75 -
Check point & Normal condition
• Check the power source.
• Check the components.
• Check the power source.
• Check the components.
CN_TRANS 1
Model
Type Non operating
PFC DC300V ¡¾ 10%
AUUW423D[LUU425HV] PFC DC300V ¡¾ 10%
5. Trouble Shooting
V
DC Link Voltage
Operating
DC380V ¡¾ 10%
DC380V ¡¾ 10%
LGE Internal Use Only