Samsung AM200FXWANR - Page 291

Samsung Electronics 290
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.
Ŷ 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, exercis
e 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 A
uto 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 e
ntrance 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 termina
l 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 A
uto Trial Operation.
9-1 Auto Trial Operation (cont.)
9-1-3 How to resolve NG items (cont.)