Nobu NBL4-18IDU32 Service Manual page 53

Service Manual
Service Manual
Desynchronizing malfunction
occurs during operation process
Whether the outdoor fan can
operate normally?
Whether the radiation for the
unit is in good condition?
Whether the input voltage is
Whether refrigerant is
Replace main board of outdoor
Is malfunction eliminated?
Replace compressor
Installation and Maintenance
Installation and Maintenance
Yes
Yes
normal?
Yes
superfluous?
No
unit
No
End
Check whether
No
the fan terminal is
connected well
Improve the radiation
circumstances for the
No
unit (such as clean heat
exchanger, improve
ventilation, etc)
No Turn on the unit again
after the power voltage
is resumed
Charge refrigerant
Yes
according to service
manual
Yes
Replace fan capacitor
Replace outdoor fan
67 49