Samsung AM072BXV Series, Руководство по обслуживанию

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Samsung Electronics 316
Test Operation
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.
■ 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.
Take corrective measures.
Take corrective measures.
Take corrective measures.
Replace the coil.
Replace the Hub PBA.
Does the result
of Auto Trial Operation show that the
indoor unit's thermistors are properly
functioning?
Is the EVI EEV
connector properly connected
to the PBA?
Are the thermistors
at the entrance and exit of the EVI attached
to the correct positions?
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.
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Connection diagram
Operation voltage
(VDC)
Phase-to-phase
resistance (Ω)
Orange
Red
Yellow
Black
Blue
12±2.0
Blue – Orange
Blue – Red
Blue – Yellow
Blue – Black
92 ± 7.4
* 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.
9-1 Auto Trial Operation (cont.)
9-1-3 How to resolve NG items (cont.)