{TAIL ~ The error state} is determined for {HEAD ~ cases} where there is no change in water level after supplying water for a predetermined time 
{ TAIL ~ The error state } is determined for { HEAD ~ cases } where there is no change in water level after supplying water for a predetermined time
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH