Operation manual of solar controller SR658
Page 49 of 105
digitals re required to enter, default password is “0000”.
If no password is reset, then please press “SET” five times to access main menu directly.
（
5
）
SYS system selection
Main menu
Main menu
Default set
Adjust range
Description
SYS
System 1
System 1-19
System selection
For every system, there are many pre-programmed options and setting, they can be
activated or changed according the system requirement. There are 19 systems can be
selected.
►Press “SET” button to select main menu “SYS”
►Press “SET” button, “SYS 1” displays on the screen
►Press “SET” button, “1” blinks
►Press “↑”, “↓” button to select system
►Press “SET” or “ESC” button, to confirm the setting
（
6
）（
7
）
LOAD/LOAD2 Tank heating set
Function description:
△
T DT Temperature difference
The controller works with a standard differential control logic. If the temperature reaches or
exceeds the switch-on temperature difference (DTO), the pump switches on. When the
temperature difference reaches or falls below the adjusted switch-off temperature difference
（
DTF
）
, the respective relay switches off.
Note:
The switch-on temperature difference must be 0.5 K higher than the switch-off
temperature difference. The set temperature difference must be at least 0.5 K higher
than the switch-on temperature difference.
