5
x
Operation
32
FA ROTEX Solaris RPS3 P2 - 06/2012
5.2.7 Global reset function
The device responds to a global reset with a new start (self-test), all parameters are reset to the factory settings and all blocked
pump output stages are released. Reset by:
• pressing OK and arrow keys simultaneously.
5.2.8 Frost protection function
When frost protection is active, the solar system only operates if the switch-on condition is met and the solar panel temperature
"T
K
" exceeds the value "T
K
save" (factory setting 40 °C). Both pumps are started simultaneously. This prevents the plate heat
exchanger from freezing at outside temperatures below 0°C.
5.2.9 Leak protection function
If no minimum flow start phase "V1" in accordance with table 5-1 is detected at the FlowSensor after switching on or releasing
pumps P1 and P2 in maximum cut-in delay for tank circulation pump "Time PsE", the following are possible:
– a fault in the FlowSensors or
– vapour formation in the storage tank circuit or
– a leak in the storage tank circuit.
To prevent all buffer water from being pumped out of the system if there is a leak, both pumps are shutdown for 2 h and the fault
signal "W" is shown in the left column of the display.
After three fault signals in succession both pumps switch off permanently and the fault signal "F" is shown in the left column of
the display.
• Replace faulty sensor or eliminate leak.
• Start system manually.
As soon as the control system records a solar panel temperature "T
K
" below
"T
R
min" (factory-defined frost protection return temperature), the frost
protection function is activated. It remains activated for 24 h after the limit
temperature has been exceeded.
While frost protection is active a star icon is shown in the standard
temperature display.
Fig. 5-5
Operating display when frost protection is
active
P
S1
Tank circulation pump
P
S2
Solar panel circulation pump
t
Time
Zeit
PsA
Tank circulation pump cut-out delay
Zeit
PsE
Tank circulation pump cut-in delay
Zeit
UB
Reverse condition delay time
Fig. 5-6
Pump start with frost protection activated
