diff --git a/src/main/java/a8k/service/hardware/SamplesPreProcessModuleCtrlService.java b/src/main/java/a8k/service/hardware/SamplesPreProcessModuleCtrlService.java
index daae24b..f9a1cee 100644
--- a/src/main/java/a8k/service/hardware/SamplesPreProcessModuleCtrlService.java
+++ b/src/main/java/a8k/service/hardware/SamplesPreProcessModuleCtrlService.java
@@ -477,24 +477,12 @@ public class SamplesPreProcessModuleCtrlService implements HardwareCtrlModule {
 		order = 1,
 		beforeExecute="beforeActionExec"
 	)
-	public AppRet<A8kScanCurve> setAeroslFanPower(Boolean enable) throws HardwareException, InterruptedException {
+	public void setAeroslFanPower(Boolean enable) throws HardwareException, InterruptedException {
 		if (enable) {
 			canBus.fanControlerSetSpeed(MId.WbTubeFanMod, 99);
 		} else {
 			canBus.fanControlerSetSpeed(MId.WbTubeFanMod, 0);
 		}
-
-		var chart = new A8kScanCurve();
-		chart.refCurve = List.of(40, 80, 120, 160, 200, 240);
-		chart.refLine = new ArrayList<>();
-		chart.scanDataCurve = new ArrayList<>();
-		for ( int i=0; i<250; i++) {
-			var num    = (int) (Math.random() * 250);
-			var offset = (int) (Math.random() * 50);
-			chart.refLine.add(num);
-			chart.scanDataCurve.add(num + offset);
-		}
-		return AppRet.success(chart);
 	}
 
 	public void beforeActionExec( Method method, List<Object> params ) {