Fault diagnosis and Trouble shooting guide
Title
Display
code
Cause of errorMeaning
No
Adjust indoor unit capacity
Is the total capacity of
indoor units normal?
Confirm indoor unit capacity code and
replace PCB
Yes
Indoor
connection
over(capacity)
51
• Over connection to outdoor unit capacity
• Malfunction of indoor unit capacity code
The total capacity of indoor
units being connected is
over rated capacity of
outdoor unit by 130% (10HP),
115% (4.5HP)
120% (6HP)
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