Work station series for solar water heating control system
10
Ⅳ Fault messages
Danger: Never try to repair the solar pumping station yourself! Consult a specialist in case of an
error.
The following table explains the error messages and corresponding handling indication. Most of the
problems can be found in the list below.
No.
Familiar problem Possible reason Solution
1
Pump works but no flow rate
displays.
There is probably too much air
in the pipeline.
Replenish heat medium liquid
and exhaust the air.
Storage reaches max. temp.
When storage temperature
drops, pump starts working.
2
System has temp. difference
but pump doesn’t work.
Solar collector reaches its max.
temp..
When collector temperature
drops, pump starts working.
3 Auxiliary heating doesn’t work.
Temperature sensor has broken
circuit or short circuit.
Check sensor connection and
make the wiring again.
4
Auxiliary heating still operates
at 23:00.
Anti-bacteria function starts up.
It’s normal.
5 System pressure drops.
There is air leakage in solar
system.
Check the pipeline and
exhaust the air.
6
Pump works but system
doesn’t have temp. difference,
meanwhile auxiliary heating
function starts up.
Frost protection function is
activated,
signal blinks.
After collector temperature
rises, pump stops working.
The solar work station SP116 shows error messages in the main operating menu if there is a problem
with temperature sensor.
Error
message
meaning Possible cause Error rectification
<FF℃>
There is broken circuit
with sensor connections.
Sensor wiring interrupted, not
connected or short circuit.
Check resistance value,
replace sensor if necessary.
<FE℃>
There is a short circuit
with sensor connections.
Sensor wiring interrupted, not
connected or short circuit.
Check resistance value,
replace sensor if necessary.
Note: A potentially defective sensor can be checked using an ohmmeter. To do this, the sensor
must be disconnected. Its resistance value can be compared with the figures below, small
deviation is acceptable.
PT1000 resistance value
℃ 0 10 20 30 40 50 60 70 80 90 100 110 120
Ω 1000
NTC 10K B=3950 resistance value
℃ 0 10 20 30 40 50 60 70 80 90 100 110 120
Ω 33620
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