Instruction of SR91 Split Pressurized Solar Hot Water System
Page 46 of 49
pump R1.
During the running of circuit pump R1, if you don’t press “Manual circuit” button, then R1 will
run for 1 hour, then it is stopped automatically. And manual circuit function is deactivated
correspondingly.
9. Protection function
9.1 Memory function during power failure
When power of controller is failed, and when power is switched-on, controller will keep the
parameters which set before power failure.
9.2 Screen protection
When no any press on button for 5 minutes, screen protection is activated automatically, and
then LED background lamp is switched-off. Through press any button to light LED lamp
again.
10 Trouble checking
The built-in controller is a qualified product, which is conceived for years of continuous
trouble-free operation. If a problem occurs, the most of causes is from the peripheral
components but no relation with controller itself. The following description of some
well-known problems should help the installer and operator to isolate the problem, so that the
system can be put into operation as quickly as possible and to avoid unnecessary cost. Of
course, not all possible problems can be listed here. However, most of the normal problems
encountered with the controller can be found in the list below, only return the controller to
seller when you are absolutely sure that none of the problems listed below is responsible for
the fault.
