LG ARTCOOL Series Service Manual page 44

7.3.5 Error code 06
Discription
• Supplied power is not normal
• Comp Connector (CN-U,V,W) is disconnected or connected to wrong position
Supposed
• Compressor is damaged (coil short)
Causes
• Too much Refrigerant
• Defect in outdoor PCB assembly
Supplied voltage to
Outdoor PCB is about
AC 220/240V ?
Yes
Is connector (CN-U,V,W)
connected to compressor and
inserted to PCB in right position?
Yes
Refrigerant pressure is within
Yes
Is the compressor running ?
Yes
Inverter components in outdoor
unit PCB assembly are working
properly ?
Yes
It's normal to protect the unit
Some overload makes this error
U
V
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Only for training and service purposes
limits?
Ω
W
DC Peak Error
replace compressor
replace PCB assembly
No
Check power source
Check CN-U,V,W connector
No
(U : RD, V : BL, W : YL)
* Check refrigerant pressure and
No
adjust.
*Check resistance
1 Between U-V, V-W, U-W port.
Short / Open circuit
No
(Comp..motor coil error)
normal:1~2Ω
Between U,V,W and Body
2
normal : over10MΩ
No
Short of SPM pins (GND-P,U,V,W pin)
1
2 Direction of D01Z~D03Z, C08Z, 10Z,
12Z,16Z
3
Assembling state of R01P~R21P&IC01P
4 Assembling state of screw between
INV-IC & Heat-sink
5 DC 15V output of Power module.
Be sure to disconnect the power cable plug
from the plug socket before disassembling the
equipment for a repair. Internal components
and circuit boards are at main potential when
the equipment is connected to the power
cables. This voltage is extremely dangerous
and may cause death or severe injury if come
in contact with it.
Be sure to turn off power switch before con-
nect or disconnect connector, or parts damage
may be occurred.
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Part 4 Trouble Shooting Guide
LGE Internal Use Only