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Operating the system with closed valves will damage the circulation pump!
Available external static pressure VS flowrate (12~16kW)
90
80
70
60
50
40
30
20
10
0
0.3
If it's necessary to check the running status of the pump when unit power on. please do not touch the internal electronic
control box components to avoid electric shock.
1) 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.
If the LED display lights up continuously green, it means the pump is running normally.
If the LED display is flashing green, it means the pump is running the venting function. The pump runs during the 10 minute
venting function. After its cycle, the installer needs to adjust the targeted performance.
If the LED is flashing green/red, it means that the pump has stopped operating due to an external reason. The pump will
restart by itself after the abnormal situation disappears. The probable reason causing the problem is pump undervoltage or
overvoltage (U<160V or U>280V), and you should check the voltage supply. Another reason is module overheating, and you
should check the water and ambient temperatures.
If the LED is flashing red, it means the pump has stopped operating, and a serious fault has happened (e.g. pump blocked).
The pump cannot restart itself due to a permanent failure and the pump should be changed.
If the LED does not light up, it means no power supply to the pump, possibly the pump is not connected to power supply.
Check the cable connection. If the pump is still running, it means the LED is damaged. Or the electronics are damaged and
the pump should be changed.
2) Failure diagnosis at the moment of first installation
If nothing is displayed on the user interface, it is necessary to check for any of the following abnormalities before diagnosing
possible error codes.
-Disconnection or wiring error (between power supply and unit and between unit and user interface).
-The fuse on the PCB may have blown.
If the user interface shows "E8"or"E0" as an error code, there is a possibility that there is air in the system, or the water level
in the system is less than the required minimum.
If the error code E2 is displayed on the user interface, check the wiring between the user interface and unit.
More error code and failure causes can be found in 13.4 Error codes.
10.7 Field settings
The unit shall be configured by the installer to match the installation environment (outdoor climate, installed options, etc.) and
user demand. A number of field settings are available. These settings are accessible and programmable through "FOR
SERVICEMAN" in user interface.
DANGER
0.8
1.3
1.8
Flowrate(m
DANGER
144
2.3
2.8
3
/h)
Ⅲ
Ⅱ
Ⅰ
3.3
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