Samsung AM072FXVAFH series Service Manual page 286

6) Abnormal operation of the Compressor
Inspection item : Operation current of Outdoor Unit Compressor.
Error code: None (The resulting report "Undetermined")
Determine the status of the operating current of the each Outdoor Unit Compressor.
If the judgment of operation current of Outdoor Unit Compressor is "Undetermined" :
Checking in accordance with the following order.
Is Outdoor Unit
Power supply specifications and wiring
status normal?
When Outdoor Unit is
stopped state : Is current(CT)value of Compressor 0?
Is resistance between
the phase of compressor normal?
Restart Auto Trial Operation
after current meter installation.
measurement results of the compressor and CT
sensor have the same value?
Is Compressor current(CT) value normal?
Samsung Electronics
Yes
Yes
Yes
Is the current
Yes
Yes
Complete
No
Confirmation and Measures
No
Replace Inverter PCB
No
No
Replace Inverter PCB
Is refrigerant
No
in the system properly?
Adjusts the refrigerant
(Addition / Emitted)
IIs operation
current of Compressor
normal?
Yes
No
No
Yes
Replace Compressor
Test Operation
9-9