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Troubleshooting
11
Logamatic 4121, 4122 and 4126 - Subject to technical modifications.
80
11.2 Troubleshooting
Fault Effect Remedy
DHW stays cold (in case of
DHW heating via Logamatic
4000).
DHW is too cold. Set DHW switch on module ZM424, FM441 or FM445 to
manual mode.
Notify your local heating contractor.
DHW stays cold (in case of
DHW heating via Logamatic
EMS).
DHW is too cold. Notify your local heating contractor.
Remote control fault The programming unit works
with the last values set on the
MEC2 programming unit.
Notify your local heating contractor.
External sensor fault
Flow sensor fault
The heating system may heat
with higher temperatures to
safeguard the heat supply.
Notify your local heating contractor.
Tell your heating contractor which temperature
sensor is faulty.
Flow sensor fault It may get too hot. Manually adjust the mixer.
Notify your local heating contractor.
Low loss header flow sensor
fault
Possible over or under flow. Notify your local heating contractor.
Heating circuit x
communication fault
No communication between one
BFU and the control unit.
Remote control may be faulty.
Notify your local heating contractor.
Boiler 1 status y burner fault It goes cold. Try and remedy the boiler fault (Æ see technical boiler
documentation).
DHW sensor fault (DHW
heating via Logamatic 4000)
If the DHW sensor is faulty, water
will not be heated for safety
reasons.
Notify your local heating contractor.
DHW sensor
HE fault
Sensor ON fault
sensor OFF fault (in case of
DHW heating via FM445)
If the DHW sensor is faulty, water
will not be heated for safety
reasons.
Notify your local heating contractor.
Heating circuit x in manual
mode
Depending on switch positions,
pumps, servomotors/actuators,
etc. will be operated manually.
The switches were set to manual (for maintenance purposes
or to remedy a fault).
Return the switches to "AUT" after the fault has been
removed.
Boiler x in manual mode No automatic function, such as
heating program.
This is not a fault.
Turn the rotary selectors on the BC10 base controller to
"AUT" if manual mode is no longer required.
Boiler x
No connection fault
It goes cold. Switch the boiler to manual.
Notify your local heating contractor.
Tab. 4 Troubleshooting
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