Samsung AM080FX A Series Service Manual page 410

Test Operation
9-1 Auto Trial Operation (cont.)
9-1-3 How to resolve NG items (cont.)
9) Electronic Expansion Valve – EVI (EVI EEV)
∙ What to inspect: Outdoor unit's EVI EEV operation
∙ Error code: None ("NG" is only indicated in the result report)
∙ How to determine error: Check variations of the temperatures at the entrance and exit of the EVI during operation
of the EVI EEV
∙ Perform inspection according to the steps shown below.
Does the result
of Auto Trial Operation show that the
indoor unit's thermistors are properly
functioning?
Are the thermistors
at the entrance and exit of the EVI attached
to the correct positions?
Is the EVI EEV
connector properly connected
to the PBA?
Is the coil
of the EVI EEV properly
functioning?*
Is the output
signal of the EVI EEV terminal on the Hub PBA
normal?*
Replace the EVI EEV*.
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
Yes
No
Yes
No
Yes
No
Yes
No
Yes
Yes
Take corrective measures.
Take corrective measures.
Take corrective measures.
Replace the coil.
Connection diagram
Orange
Red
Yellow
Black
Blue
Replace the Hub PBA.
* It is possible to inspect the output signal, using a separate EVI EEV and
the vacuum mode.
* Replace it if the NG is still found after an additional Auto Trial Operation.
Operation voltage Phase-to-phase
(VDC) resistance (Ω)
Blue – Orange
Blue – Red
12±2.0 Blue – Yellow
Blue – Black
92 ± 7.4
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