5.2.14 271Error
Error conditions and Check Items
Error Description
E271
Temperature differential limit
If the temperature differential (supply temperature - return temperature) is higher than
54°F(30°C), the alarm code (E271) is displayed. The system operates normally.
Check items
Check if flow rate heating pipe is proper? Check if the heating pipe is clogged with debris.
Check if Air vent is close totally
Check if capacity of the circulation pump(external) is enough to circulate water in pipe
Check if Air Purge is fully done in the system. (If Air Vent is opened?)
Is the space heating pipe
connection normal?
Check the supply and return
temperature sensor
Replace space heating pipe
connection
No
Yes
Check method
Fault Possible Causes Check method
Space heating pipe
connection
Abnormal Connection
1. Check if flow rate heating pipe is proper? Check if the heating pipe is clogged
with debris
2. Check if capacity of the circulation pump(external) is enough to circulate water
in pipe
Defective sensor
Defective temperature
sensor connector
Check if the temperature sensor is open and if the connector is connected
properly.
Possible Issues No Heat Demand User do not use boiler
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