EN-SUNGO-SL_BA-0809-1122P300
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4.6 Service – System Messages
System information with display
Display
Description
Remedy
System messages
All system messages are displayed with a blinking caution symbol. In case of sensor errors the sensor in
question is also marked with short circuit or interruption symbol.
Interruption
The sensor on the display or the pipe is
interrupted.
●
Test the resistance value of the sensors and compare with
the tables.
●
Check all connections to the sensor.
Short circuit
There is a short circuit on the sensor on the
display, the cable or the output on the
control.
dT too high
A value of 20 K is added to the switch-on
difference between T1 and T2. The message
is displayed if after 30 minutes the total
difference has not been reduced.
●
Check wiring to the pump
●
Check system for air and vent if required
●
Check sensors and sensor wiring, replace sensors if
required
4.7 Service – Sensor Control
Resistance values for Pt1000 sensors in relation to the temperature
-10 °C
0 °C
10 °C
20 °C
30 °C
40 °C
50 °C
60 °C
70 °C
80 °C
90 °C
100 °C
110 °C
961
Ω
1000
Ω
1039
Ω
1078
Ω
1117
Ω
1155
Ω
1194
Ω
1232
Ω
1271
Ω
1309
Ω
1347
Ω
1385
Ω
1423
Ω
The working condition of the sensor can be checked with this table and an Ohm meter.
5. Application examples
5.1 Standard Single Tank System
!
Blinking
!
Blinking
!
Blinking
° C
!
Blinking
° C
Ttw
T4
T1
T3
T2
A
AB
B
Vr
P2
P3
TE
RMO
P1
P1
CIRCO
T4
A1
T1
A2
T2
T3
T7
T5
T1
Measuring the yield
Solar
return-flow
Collector field
Cold water
Hot water
Version 1 – TERMO Combi Cylinder
Heating circuit
Oil or gas
boiler
P1: Solar circuit pump
P2: Heating circuit pump
P3: Tank charging pump
Vr: Switch-over valve for return temperature increase
T1: Collector sensor
T2: Tank sensor, bottom
T3: Tank sensor, middle
T4: Sensor heating return-flow
T5: Yield measurement, return flow sensor
T7: Yield measurement, volume flow metre
Collector field
Figure 3 Standard single tank system controlled by SUNGO SL.
