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5. Trouble Shooting
6.13 Check code Trouble shooting CH23, CH28
Check the wire
connection.(U,V,W)
Is it normal ?
Is it normal ?
Yes
Yes
No
Correct
connection
No
Change
Compressor
Check the input power
Is it normal ?
Yes
No
Change
Compressor
Check Flow Chart
❊ Dc link voltage table
❊ Check TRANS1
❊ Check DC link voltage
Type Non operating Operating
1 Phase AUUW126C PSC DC300V ± 10% DC280V ± 10%
AUUW186C PSC DC300V ± 10% DC280V ± 10%
AUUW246D PFC DC300V ± 10% DC380V ± 10%
AUUW306D PFC DC300V ± 10% DC380V ± 10%
AUUW366D PFC DC300V ± 10% DC380V ± 10%
AUUW426D PFC DC300V ± 10% DC380V ± 10%
AUUW486D PFC DC300V ± 10% DC380V ± 10%
AUUW606D PFC DC300V ± 10% DC380V ± 10%
3 Phase AUUW368D PSC DC540V ± 10% DC500V ± 10%
AUUW428D PFC DC540V ± 10% DC680V ± 10%
AUUW488D PFC DC540V ± 10% DC680V ± 10%
AUUW608D PFC DC540V ± 10% DC680V ± 10%
Model
DC Link Voltage
V
CN_TRANS 1
23
28
DC Link
Low voltage.
DC Link
High voltage
• 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 the power source.
• Check the components.
• Check the power source.
• Check the components.
Display
code
Title Cause of error Check point & Normal condition
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