LG Therma V AHBW A0 Series - Page 61

Trouble Shooting Guide
- 61 -
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Check Over load condition
- Overcharging of
refrigerant
- Pipe Length
- Condenser is blocked
- Outdoor fan is locked
Is it normal ?
(1 Φ: 230 V ± 10%
3 Φ: 400 V ± 10%)
Change Main PCB
Check the wire
connection. (U,V,W)
Is it normal ?
Check the resistance of
comp. (No difference at
each terminal)
Is it normal ?
Yes
Yes
No
Correct
connection
Yes
No
Needs electric work
Check DC link
capacitor Is it normal?
(Refer to belows)
Yes
Yes
No
Change DC link
capacitor
or Main PCB
No
Change
Compressor
Check the electricity
leakageof the compressor.
(Refer to comp check table)
Check the input power
(Outdoor, unit)
Is it normal ?
Yes
No
Change
Compressor
Is it normal ?
Yes
No
Remove obstruction
Change outdoor fan
or motor
Change refrigerant
Check Flow Chart
❊ Dc link voltage table
Type Non operating Operating
1 Phase AUUW126C PSC DC300V Ź 10% DC280V Ź 10%
AUUW186C PSC DC300V Ź 10% DC280V Ź 10%
AUUW246D PFC DC300V Ź 10% DC380V Ź 10%
AUUW306D PFC DC300V Ź 10% DC380V Ź 10%
AUUW366D PFC DC300V Ź 10% DC380V Ź 10%
Model
DC Link Voltage
26
27
DC Compressor
Position
PSC Fault
PFC Fault
• Compressor
position detect error
• Over current at
“IGBT”/PFC module
• Check the connection of comp wire “U,V,W”
• Malfunction of compressor
• Check the component of “IPM”, detection parts.
• Check the component of “IGBT” /PFC module.
• Check the components.
Display
code
Title Cause of error Check point & Normal condition