LG Multi V - Page 144

- 144 -
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Self-diagnosis function
n Error diagnosis and countermeasure flow chart
1) Check connection between power cables and communication cables, check communication green LED blink of
HR unit PCB
2) If communication 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 communication error of HR unit occurs, it can’t be released until reset of outdoor power)
3) If communication green LED blink of HR unit PCB is abnormal(not blinking,just on), check communication con-
dition of total indoor units(Refer to CH05)
If communication green LED blink of HR unit PCB is abnormal(not blinking, just on) even if communication con-
dition is normal, replace HR unit PCB
[NB] If Indoor units/communication cables of HR unit and cables of power 220 V has been changed each other,
communication parts and indoor will be burnt
HR Unit PCB (PRHR**2(A))
HR Unit PCB (PRHR**3(A))
SW02M
(Dip switch for setup of
The function of HR unit)
SW03M
SW04M
SW01M/SW03M/SW04M
(Switch for manual valve
addressing)
SW01M
SW05M
#1 valve housing
#4 valve housing
7-SEG
Branch #1~4
Bypass
(from left)
SC EEV
Branch #3,4
High/Low
(from top)
Branch #1,2
High/Low
(from top)
Branch #5~8
Bypass
(from left)
Branch #7,8
High/Low
(from top)
Branch #5,6
High/Low
(from top)
7-SEG
7-SEG
Liquid Bypass
Valve
- SW02E : Use only SW No.5
- SW01E : Branch #5~8
(from SW No.1)
- SW01C
- SW01D/SW01C/
SW02B/SW01B/SW02E
- SW01E : Branch #1~4
(from SW No.1)