I changed Hydro. oil and my service monitor flashing

[etap]

Yesterday, I ran it for 5min. after I changed the oil,It was showing 380 hrs. and than It moved to 400 hrs,and flashing SVC. Would there be a reset on the meter,. It is a model 804-200 and it don't stop! Can you reverse the Polarity to get the right time back on it. THX's

[weaver]

Yesterday, I ran it for 5min. after I changed the oil,It was showing 380 hrs. and than It moved to 400 hrs,and flashing SVC. Would there be a reset on the meter,. It is a model 804-200 and it don't stop! Can you reverse the Polarity to get the right time back on it. THX's

Try unhooking the battery and let it sit for a couple minutes and then reconect the battery..