6 Troubleshooting – Possible faults
62
HDG Euro V3.0 with HDG Lambda Control 1 - V 1 - en
©
HDG Bavaria GmbH 06/2008
6.2 Possible faults
Faults which do not interrupt the production of heat
The fault indicator lamp on the control panel of the HDG Lambda
Control 1 flashes.
Fault message
Cause
Remedy
Incorrect oxygen
level reading
Sensor is worn out
or needs cleaning
Plug/cable
Controller is
faulty
•
Lambda sensor is worn
out or needs cleaning
•
Clean and then calibrate the
lambda sensor
✎
See chapter “5 Cleaning and
maintaining the HDG Euro”
•
Can only be reset by calibrating
Buffer temp.
reading incorrect
Plug/cable
Sensor is faulty
Controller is
faulty
•
Sensor is faulty
•
Contact broken
•
Controller is faulty
•
Have the fault fixed by an
authorised installer
•
Automatically reset after fault is
eliminated
Return temp.
reading incorrect
Plug/cable
Sensor is faulty
Controller is
faulty
(For system 5 only)
•
Sensor is faulty
•
Contact broken
•
Controller is faulty
•
Have the fault fixed by an
authorised installer
•
Automatically reset after fault is
eliminated
Boiler temperature
too low
Return valve
Plug/cable
Motor/controller
•
Sensor is faulty
•
Contact broken
•
Controller is faulty
•
Return valve
•
Have the fault fixed by an
authorised installer
•
Reset by pressing the
Arrow
button
Table 6/1 - Faults with flashing indicator lamp