PC-250 Filter control unit operating manual Page: 13 (24
Balancing the temperature controller
The electronic temperature regulator and the temperature
centre are balanced with one another in the works. If one of
the sensors is replaced, or if a sensor cable is extended, a
new balance must be carried out if necessary using the
potentiometers in the controller. Turning the water
temperature sensor potentiometer clockwise causes an
increase in the water temperature displayed. If the solar
sensor potentiometer is turned clockwise, a higher collector
temperature is displayed. Since the solar temperature
regulation only works correctly with precisely balanced
sensors, this balance should only be carried out by a trained
service technician.
Temperature sensor resistance
Both temperature sensors have the resistance
values listed to the right.
Fuses
The electronic control system is protected by a 0.25A fine-wire
fuse on the PCB in the inside of the device. The short-circuit
protection for the filter pump must be provided by a backup
fuse of maximum 16A on site.
Service terminal
An osf service terminal (Art. No. 3010000900) can be
connected to this control system for optimum control system
settings for a wide range of swimming pool equipment and for
assisting in initial startup and fault diagnosis. The socket for
this is located on the rear of the top PCB inside the device.
Before opening the housing and plugging in the service
terminal, you must ensure that the control system has
been isolated from the mains!
Once the control system has
been switched on, the service terminal display shows the first
4 lines of the diagnosis text, e.g.:
Filterbetrieb
Temp. erreicht
Wasser: 23,0°
Solar: 38,4°
Betriebsart der Filteranlage
Betriebsart der Heizung
gemessene Wassertemperatur
gemessene Kollektortemperatur
Temperature Resistance
20°C 5800 Ohm
25°C 4600 Ohm
30°C 3700 Ohm
