6
x
Faults and malfunctions
45
FA ROTEX Solaris RPS3 25M - 03/2010
The T
R
light in the Solaris R3 control unit flashes. Return temperature "T
R
" is greater than 40 °C and is 10 K higher than the
storage temperature "T
S
". The circulation pump and, where installed, the booster pump, are switched off. The cause is a
defective or incorrectly connected sensor.
•
Install the sensor correctly or replace it; normal system operation will be resumed.
A "W" is flashing in the status column of the Solaris R3 control unit. The start phase minimum flow rate "V1" at the FlowSensor
(see Page 32, Table 5-1) is not achieved after switch-on of the circulation pump and, where installed, the booster pump and after
the time defined by parameter "Time P2" has elapsed.
The system is temporarily inhibited for 2 h (pump(s) is (are) switched off), but attempts to start again after the inhibit
time.
If this event occurs three times in succession without an intervening successful start, the pump(s) is (are) switched off
permanently and the status is set to "F".
An "F" is flashing in the status column of the Solaris R3 control unit. The start phase minimum flow rate "V1" at the FlowSensor
(see Page 32, Table 5-1) is not achieved after switch-on of the circulation pump and, where installed, the booster pump and after
the time defined by parameter "Time P2" has elapsed. The pump(s) is (are) switched off.
•
Investigate for a possible leak in the Solaris system, rectify the problem, and finally restart the system by switching the
control unit off/on.
If the system cannot be filled (Status "F"), although the pump(s) has (have) been started by the control unit, the following faults
might be the cause:
1.
There is air, drawn in while the system ran empty, in the circulation pump and, where installed, in the booster pump.
• Check the pump(s) for air.
2.
Check the installation for leaks.
• Check the installation for leaks and rectify if necessary. Observe the notes in Chapter 4 "Commissioning and decommis-
3.
Increase the output of the pump(s) at the selection switch or increase the start running time "Time P2" (chap. 5.4).
4.
Check the installation for blockage. In frosty conditions, ice plugs can form in incorrectly run connecting pipes.
If there is nothing showing on the display, and the main switch in the illuminated "On" position:
•
Replace the control unit (electronic fault).
If the main switch is not illuminated in the "On" position, there is no power supply to the control unit.
•
Check the mains supply cable and the domestic power supply (fuse, switch).
If steam escapes continuously from the Solaris DHW storage tank during solar radiation, the flow rate is too low.
•
In this case, the system settings must be checked.
Special notes on electric sensors
•
Evaluate the display of the Solaris R3 control unit.
•
Open up the housing of the Solaris R3 control unit and withdraw the affected sensor and disconnect it if necessary.
•
Examine the contact positions of the affected sensors, and measure the resistance (or the DC voltage for flow temperature
and flow rate sensors) on the sensor end.
When the fault has been rectified, the system automatically resumes normal operation and is in the operating mode.
The resistance and voltage values of the sensors are shown in Image 8-1 and Image 8-2. Internal faults of the controller
electronics that can be diagnosed, are shown in the display according to Table 6 -1 (Status "G"). They also cause a safety switch-
off of the pumps. Switching the system off and then on again after 2 minutes might remedy the fault; if not, the control unit must
be replaced.
Only original ROTEX replacement parts may be used.
