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6.2.1 Hydraulic operational area constant speed ,,
Constant speed ⅠⅡⅢ
Constant speed ⅠⅡⅢ
5/7 kW
10~16kW
6.2.2 Pump LED diagnosis and solutions
The pump has an LED operating status display. This makes it easy for the technician to search for the cause of a fault in the heating system.
Led color
Meaning
Diagnostic
Cause
Remedy
Continuous green
Normal running
Pump runs as expected
Normal operation
Quick green blinks
Venting routine
running
Pump runs during 10min in
venting function
Afterwards the installer has
to adjust the targeted
performance
Red /green blinking
Abnormal
situation (pump
functional but
stopped)
Pump will restart by itself
after the abnormal
situation disappeared
1. Under voltage or
Overvoltage :
U<160V or U> 280V
2. Module overheating
: T° inside motor too
high
1. Check voltage supply
160V<U<280V
2. Check water & ambient
Red blinking
Stopped (e.g.
pump blocked)
Reset the pump
Check LED signal
Pump cannot restart
itself due to a
permanent failure
Change pump
No LED
No power supply
No voltage on electronics
1) Pump is not
connected to power
supply
2) LED is damaged
3) Electronics are
damaged
1) Check cable connection
2) C heck if pump is running
3) Change pump
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