Outdoor Unit - LG LAN091CNP, LAU091CNP, LAN121CNP Service Manual

Troubleshooting Guide

OUTDOOR UNIT

Connector Type
CN-POWER
RY-COMP
terminal
CN-TRANS
CN-FAN
The connecting
wire of CN-
DC/DC, and
Indoor and
Outdoor Unit
Blue
Black
Brown
Red
70 Room Air Conditioner
Condition
OPEN
Connecting reversely
OPEN
Connecting reversely
OPEN
OPEN
OPEN
Connecting error
( )
Connecting error
( )
Connecting error
( )
Connecting error
( )
Connecting error
( )
Connecting error
( )
Phenomena
• All functions stop.
• The operation with the remote controller, forced and
test one do not operate.
• PWB pattern is damaged when applying the power.
• All functions stop or the compressor does not operate.
• The operation with the remote controller, forced and test
one do not operate.
• All functions stop.
• The operation with the remote controller, forced and test
one do not operate.
• All functions stop.
• The operation with the remote controller, forced and
test one do not operate.
• The Indoor Fan does not operate.
• All functions stop.
• The operation with the remote controller, forced and test
one do not operate.
• The only signal of remote controller operation/stop is
inputted, but the product does not operate.
• The RED indicator of outdoor unit blinks 5 times after 2
minutes with applying the power.
• The beep sound, such as "beep, beep, beep, beep,
beep", occurs periodically in Indoor unit.
• The signal input of a remote controller and operation of
product is impossible.
• The RED indicator blinks 5 times after 2 minutes with
applying the power.
• The signal of remote controller is inputted, but the
product does not operate.
• The RED indicator of outdoor unit and the operation
indicator of indoor one blinks 5 times after 2 minutes
with applying the power.
• No power for Indoor unit.
• The signal input of the remote controller and opera-
tion of product is impossible.
• The thermal protector of the Power Trans operates
when let it alone for long time.
• The signal of the remote controller is inputted.
• The fuse and Q61 in the Outdoor unit are damaged
when the indoor fan is operated.
• No power for Indoor unit.
• The signal input of the remote controller and opera-
tion of product is impossible.
• The RED indicator of the Outdoor unit blinks 5 times
after 2 minutes with applying the power.