Samsung Electronics 290Test Operation9) 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 operationof 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, 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 resultof Auto Trial Operation show that theindoor unit's thermistors are properlyfunctioning?Is the EVI EEVconnector properly connectedto the PBA?Are the thermistorsat the entrance and exit of the EVI attachedto the correct positions?Is the coilof the EVI EEV properlyfunctioning?*Is the outputsignal of the EVI EEV terminal on the Hub PBAnormal?*Replace the EVI EEV*.Perform Auto Trial Operation again.NoNoNoNoNoYesYesYesYesYesYesConnection diagram Operation voltage(VDC)Phase-to-phaseresistance (Ω)OrangeRedYellowBlackBlue12±2.0Blue – OrangeBlue – RedBlue – YellowBlue – Black92 ± 7.4* It is possible to inspect the output signal, using a separate EVI EEV andthe 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.)
