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7. Troubleshooting
7
Troubleshooting
7.1
Electricity supply
1
3
7.2
Sensor fault
64
DANGER
Before any work, switch off the mains supply to the control
system.
If the LED or the display are off, check the mains supply to the control
system. The regulator is protected by a 4 A fuse.
1. Remove the control system cover by unscrewing the 2 screws.
2. Check the fuse and change it if necessary. A spare fuse can be
found in the control system housing.
3. Put the cover back in place and secure with the screws.
CAUTION
If the control system still does not work, replace it.
2
M002769-B
Steady symbol Flashing symbol State
]
1. Check the temperature display channels for each sensor.
Solar collector temperature sensor
TC
DHW tank temperature sensor
TR
THR Back-up temperature sensor
2. If the channel does not display the temperature, the sensor is
M002770-B
defect. An error code is displayed in place of the temperature. The
defective sensor flashes very rapidly on the display.
Error code Description
Cable breakage Check the cable for the sensor concerned
888.8
Short circuit
-88.8
3. If the sensor is still defect, check its value with an ohmmeter.
¼See chapter: "Technical specifications", page 16.
The sensor is defect.
a
Checking / solution
Check the cable for the sensor concerned
200SE-2S - 300SE-2S
26/04/2016 - 7607575-05
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