diff --git a/apps/chrg/applications/thread/chrg_north.c b/apps/chrg/applications/thread/chrg_north.c
index 6e7178f..7f65fee 100644
--- a/apps/chrg/applications/thread/chrg_north.c
+++ b/apps/chrg/applications/thread/chrg_north.c
@@ -228,7 +228,7 @@ void chrg_sink_parse(rt_uint8_t *frame_data, eIDX_SOU_CH idx,
 //			volt_low[idx]++;
 			/* Treat low voltage as a fault only after voltage was once valid. */
 			if (volt_set_ok[idx] == 1) {
-				if (++volt_low[idx] >= 5) {
+				if (++volt_low[idx] >= 3) {
 					volt_set_ok[idx] = 0;
 					no_curr[idx] = 0;
 					pSW->sink.work_mode = SINK_WORK_LOW;
@@ -245,7 +245,7 @@ void chrg_sink_parse(rt_uint8_t *frame_data, eIDX_SOU_CH idx,
 				pSW->sink.work_mode = SINK_WORK_RUNING;
 				/* Voltage is normal but current is still zero: retry from WAIT. */
 				if (pSW->Now_current <= 200) {
-					if (++no_curr[idx] >= 5) {
+					if (++no_curr[idx] >= 3) {
 						pSW->sink.work_mode = SINK_WORK_WAIT;	
 						no_curr[idx] = 0;
 					}