Operation manual of solar controller SR1568
Page 69 of 87
For control and service work, the operating mode of the relays can be manually adjusted. For
this purpose, select the adjustment menu MAN (for R1, R2, R3, R4, R5, HR) to set manual
output “On/OFF”.
Note: Manual modes is activated, Man displays on the screen, controller runs for 15
minutes and then switch-off all output, control exits manual mode automatically.
BLPR（Blocking protection）
In order to protect the pumps against blocking after standstill, the controller is equipped with
a blocking protection function. This function switches on the relays one after another every
day at 12:00 a.m. for 10 s at 100 % speed.
OTDIS (Thermal disinfection)
Thermal disinfection
This function helps to prevent the spread of Legionella in DHW tanks by systematically
activating the after-heating. One sensor and one relay can be selected for this function.
For thermal disinfection, the temperature at the allocated sensor has to be monitored. This
protection is ensured when, during the monitoring period PDIS, the disinfection temperature
is continuously exceeded the disinfection temperature TDIS for the entire disinfection period
DDIS. Thermal disinfection can only be completed when the disinfection temperature is
exceeded for the duration of the disinfection period without any interruption.
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