LG AS-W096ERH0 Service Manual page 55

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
°Ê normal : over10M Ω
U
V
60 Room Air Conditioner
• Supplied power is not normal
• Comp Connector (CN-U,V,W) is disconnected or inserted to wrong
position
• Compressor is damaged (coil short)
• Too much Refrigerant
• Defect in outdoor 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)
Ω
W
Cause of error
Cause of error
YES
Inverter components in outdoor
right ?
* 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.
replace compressor
replace pcb assembly
YES
Refrigerant pressure is right ?
No
Check refrigerant pressure
and adjust.
pcb assembly are
No