1. When the low voltage detects that the battery voltage is less than 2.7V, the motor valve will be closed and "under voltage" and "off valve" will be displayed. At this point, new batteries need to be installed in order to reuse the IC card water meter.
2. When the pre-stored water of the water meter is used up, the water meter has not closed the valve, which will cause water to flow out of the water meter. This is also the case that the battery of the water meter is out of power. Batteries that need to be replaced with IC card watches
3. When the electronic display part of IC card smart water meter does not display the water meter number, and the water meter sounds an alarm, this means that the battery of the water meter is out of power at this time, and the battery of the water meter needs to be replaced.
4. When the water meter count is inaccurate, it may be that the battery of the water meter is out of power, or that the IC card smart water meter is broken.