Samsung AM080FX A Series Service Manual page 407

Test Operation
9-1 Auto Trial Operation (cont.)
9-1-3 How to resolve NG items (cont.)
6) Compressors
∙ What to inspect: Compressor's operation electric current
∙ Error code: None ("NG" is only indicated in the result report)
∙ How to determine error: Compare the compressor's operation electric current and the reference electric current.
∙ Perform inspection according to the steps shown below.
Are the specifications
of the power supplied to the outdoor unit
and the cable connection
normal?
Yes
Is the compressor's
operation electric current (CT1, CT2) value 0
when the compressor is
not active?
Yes
Cut off the power supplied to the outdoor unit.
Is the compressor's
phase-to-phase (U-V, V-W, W-U) resistance
lower than 2Ω?
Yes
Install an ammeter, and then
perform Trial Operation (cooling/heating)
- See the instructions on Key operation modes.
Is the value
indicated by the ammeter
identical with the compressor's operation
electric current (CT1, CT2)
value?
Yes
Is the
compressor's operation electric current
(CT1, CT2) value normal?
Yes
Perform Auto Trial Operation again.
■ Precautions
- To replace a component or inspect the PBA, be sure to cut off the power supply first.
If inspection must be performed with the power supply on, exercise extra care to prevent electric shock.
Samsung Electronics
No
Take corrective measures.
No
Replace the inverter PBA.
No
Replace the compressor.
No
Replace the inverter PBA.
No
Is the operation cycle
normal?
No
Perform Trial Operation (cooling/heating)
- See the instructions on Key operation modes.
Yes
Replace the compressor.
Take corrective measures.
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