LG LZ-H0106BA0 Service Manual page 44

Troubleshooting
System checklist table(table1-2) for using wired remote controller(LCD TYPE)
No. Details
1 No message displayed
on remote controller
2 No control with remote
controller
(displaycommunicate
failure)
3 Odd message displayed
on the screen
Breakdown mode2: failure code is displayed on remote controller.
LED light is on or flickering on the circuit panel of ventilation system.
The failure details are indicated by checking number indicated on air conditioner interlocking controller or on wired
remote controller(LCD-TYPE) and the number of on-and-off(flickering) in LED(red color) on the circuit plate.
Error code Details display(operation LED/ main body display)
Indoor thermistor
CH1
Open/Short
Outdoor thermistor
CH2
Open/Short
Remote controller
communication
CH3
error
Error codes and LED display table for using ZCON-BS2 (table 2)
Checking No. Details
CH1 Errors related to
indoor thermistor
CH2 Errors related to
outdoor thermistor
CH3
Remote controller
communication errors
44 Ventilation System
Possible Causes
• No power supplied to ventilation
system, or incorrect power connected
to the system
• Longer total wiring length of
transmission line than prescribed
• No connection of remote controller to
CN-REMO
• Longer total wiring length of
transmission line than prescribed
(more than 500m)
• Multiple transmission line wired as
multicable.
• Running out of liquid crystal
0.5 sec
3 sec
Possible Causes
• Connector failure related to
thermistor
• Connector failure related to
thermistor
• Several transmission lines wired
as multicables
• Transmission lines in too close
vicinity to power line
• Connecting failure of transmission
line
• Longer wiring length of
transmission line than prescribed
( more than 500m)
Necessary actions
• Check the power in ventilation system
• Check the wiring length of transmission line
• Connect the transmission line to CN-REMO
• Check the length of transmission line
• Use exclusive wires, and wire the transmission
lines at more than 5cm intervals.
• Replace the remote controller
wired remote controller
LCD display(screen)
CH01
CH02
CH03
Necessary actions
• Check the connection of circuit connector
and lead line connecting connector
• Check the connection of circuit connector
and lead line connecting connector
• With electric wires, place each transmission
line at intervals.
• Wire the transmission line and power line at
more than 5cm intervals.
• Check the connection of transmission line.
• Check the wiring length of transmission line.
Loading status
Turn operation off
Turn operation off
Turn operation off