Model: M-4
1：power on self-test
2 preset of water temperature
3 water shortage alarming
4 water refill in shortage
5 temperature-control water refill
6 manual water refill
7 compulsory water refill
8 high—temperature radiance
9 compulsory water refill
10 water refill under low hydraulic pressure
11 automatic pressurization
12 thermal retardation of pipeline
13 automatic overflow proof
14 automatic pressurization
15 water quality setting