Fault diagnosis and Trouble shooting guide
Title
Display
code
Cause of errorMeaning
No
Execute group
setting
Execute group
setting
Yes
Is the state of
transmission in
outdoor unit normal?
Yes
Check and replace
indoor unit PCB
Repair the
connection
No
Check and replace outdoor
unit PCB
Is the PCB of central
controller normal?
No
Transmission
error from
central
controller to
main PCB in
the outdoor
unit
55
• Group setting is not carried out
• Transmission connector unplugged
• Transmission cable misconnected / disconnection
• Malfunction of central controller circuit
• Malfunction of transmission circuit of indoor unit
In the case that main PCB
can not receive any signal
from central controller
successively for 3minutes
Trouble shooting Flow
Yes
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