SR882 operation manual
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6. Protection function
6.1. Memory protection
In case power failure occurs, controller keeps the parameter settings unchanged.
6.2 Screen protection
When no any press on button for 3 minutes, screen protection is activated automatically,
and then LCD lighting lamp is switched-off. Through press any button to light LCD lamp
again.
6.3 Circuit pump protection
Under the precondition that digital flow counter is used in solar system, when controller
monitors that there is no flow in the pipe, circuit pump P1 will be not triggered anymore,
“P1”displays on the screen. Switch-off the power supply of controller to exit the protection,
reset the P1.
7. Trouble shooting
7.1 Trouble protection
a
.
When there is a break or short circuit between the connection of temperature sensors,
controller switches off the corresponding functions and no more output signals are given, at
the same time error signals are showed on the display. If controller does not
work correctly, please check following points.
►Press “+”“-” button to check error code, “ “signal blinks on the LCD screen