LG General Wall Mounted-Inverter Type - Manual (Page 52)

52 Room Air Conditioner
Part 4 Trouble Shooting
Cause of error
6
• 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
DC Peak Error
Supplied voltage to
Outdoor pcb is about
AC 208~230V ? Is connector (CN-U,V,W)
connected to compressor and
inserted to pcb in right position ?
YES
No
Check power source
No
Check CN-U,V,W connector
(U : RD, V : BL, W : YL)
Check flow
Refrigerant pressure is right ?
YES
No
Check refrigerant pressure
and adjust.
Is the compressor right ?
YES
No
Check resistance
Between U-V, V-W, U-W port.
→ Short / Open circuit
(Comp.motor coil error)
→ normal : 1 ~2Ω
Between U,V,W and Body
→ normal : over 10MΩ
Inverter components in outdoor pcb assembly are
right ?
YES
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.
V
U
W
Ω
Description Cause of error Error code