Trouble Shooting Guide
- 56 -
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Only for training and service purposes
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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 2
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
No
No
Change DC link
capacitor
or Main PCB 2
Remove obstruction
Change outdoor fan
or motor
Change refrigerant
No
Change
Compressor
Check the electricity
leakageof the compressor.
(Refer to comp check table)
Check the input power
Is it normal ?
Yes
No
Change
Compressor
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%
AUUW426D PFC DC300V Ź 10% DC380V Ź 10%
AUUW486D PFC DC300V Ź 10% DC380V Ź 10%
AUUW606D PFC DC300V Ź 10% DC380V Ź 10%
3 Phase AUUW368D PSC DC540V Ź 10% DC500V Ź 10%
AUUW428D PFC DC540V Ź 10% DC680V Ź 10%
AUUW488D PFC DC540V Ź 10% DC680V Ź 10%
AUUW608D PFC DC540V Ź 10% DC680V Ź 10%
Model
DC Link Voltage
21
DC Peak
• Instant over current
• Over Rated current
• Poor insulation of IPM
• An instant over current in the U,V,W phase
- Comp lock
- The abnormal connection of U,V,W
• Over load condition
- Overcharging of refrigerant
- Pipe length.
• Poor insulation of compressor
Display
code
Title Cause of error Check point & Normal condition
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