LG ARUV Series Service Manual page 294

Troubleshooting Guide
Error No.
204(HR unit1)
208(HR unit2)
212(HR unit3)
Transmission error
216(HR unit4)
between the HR unit
220(HR unit5)
and outdoor unit
224(HR unit6)
228(HR unit7)
232(HR unit8)
Error diagnosis and countermeasure flow chart
1) Check connection between power cables and transmission cables, check transmission green LED blink of HR
unit PCB
2) If transmission green LED blink of HR unit PCB is normal, check setting of rotary switch of HR unit and Dip
switch(Refer to CH200),
Reset power of outdoor and HR unit
(If transmission error of HR unit occurs, it can't be released until reset of outdoor power)
3) If transmission green LED blink of HR unit PCB is abnormal(not blinking,just on), check transmission condition
of total indoor units(Refer to CH05)
If transmission green LED blink of HR unit PCB is abnormal(not blinking, just on) even if transmission condition
is normal, replace HR unit PCB
[NB] If Indoor units/transmission cables of HR unit and cables of power 220V has been changed each other,
transmission parts and indoor will be burnt
HR Unit PCB
Green LED blinking:
transmission is normal
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Only for training and service purposes
Error Type
Transmission error between
the HR unit and outdoor unit
Error Point
1. Defective connection in HR unit power
supply and transmission connection
2. Wrong setting of the HR unit Rotary
switch and Dip switch
3. Defective HR unit PCB
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Main Reasons
LGE Internal Use Only