LG AS-W096ERH0 Svc Manual page 60

Troubleshooting Guide
Error code Description
6
DC Peak Error
Check flow
Supplied voltage to
Outdoor pcb is about
AC 220/240V ?
No
Check power source
YES
Is the compressor right ?
No
Check resistance
Between U-V, V-W, U-W port.
¡ Short / Open circuit
(Comp.motor coil error)
¡ normal : 1 ~2 Ω
Between U,V,W and Body
¡ normal : over10M Ω
U
W
V
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Only for training and service purposes
• Supplied power is not normal
• Comp Connector (CN-U,V,W) is disconnected or inserted to wrong
position
• Compressor is damaged (coil short) ➔ replace compressor
• Too much Refrigerant
• Defect in outdoor pcb assembly ➔ replace pcb assembly
YES
Is connector (CN-U,V,W)
connected to compressor and
inserted to pcb in right position ?
No
Check CN-U,V,W connector
(U : RD, V : BL, W : YL)
YES
Ω
Cause of error Cause of error
YES
Inverter components in outdoor pcb assembly are
right ?
No
* 9 K/12K Model
Check
Short of SPM3 pins (GND - P, U, V, W pin)
Direction of D01Z~D03Z, C08Z,10Z,12Z,16Z
Assembling state of R01P ~ R21P & IC01P
Assembling state of screw between INV-IC &
Heat-sink
DC 15V output of Power module.
* 18 K Model
Check
Short of SPM2 pins (GND – P, U, V, W pin)
Direction of D01Z~D03Z, C08Z,10Z,12Z,16Z
Assembling state of R01P ~ R21P & IC01P
Assembling state of screw between INV-IC &
Heat-sink
DC 15V output of Power module.
- 60 -
Refrigerant pressure is right ?
No
Check refrigerant pressure
and adjust.
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