what does E1 and E4 means for S&A chiller ?

what does E1 and E4 means for S&A chiller ?

E1: Room temperature too high alarm

E2: Water temperature too high alarm

E3: Water temperature too low alarm
E4: Room temperature sensor fault
E5: Water temperature sensor fault
E6: Flow 1 alarm
E7: Flow 2 alarm

https://laserqa.com/questions/D1pj/what-does-e1-and-e4-means-for-sanda-chiller