EN
V2.0 / 21.12.17
MU2H-0491ge23 R1217 43
Error messages
Error display
Error description
Measures/notes
• Hardware error or
damaged firmware
•
Check flow sensor, connection
cable and calculator unit for external
damage
• Device must be replaced
•
Supply flow
sensor broken
• Check temperature sensor and pipes
for mechanical damage
• Device must be replaced
• Short circuit
supply flow sensor
• Check temperature sensor and pipes
for mechanical damage
• Device must be replaced
•
Return flow
sensor broken
• Check temperature sensor and pipes
for mechanical damage
• Device must be replaced
• Short circuit
return flow sensor
• Check temperature sensor and pipes
for mechanical damage
• Device must be replaced
Error messages with module in place
Error display
Error description
Measures/notes
• Add-on module has
been paired with an-
other meter before
• The module has the
measuring data of
another meter
• Save data, since these are overwrit-
ten after a short time
• Press any key to delete the display
• After deletion the new add-on mod-
ule will be accepted
• Low power
(radio add-on module)
• Maximum operating duration expired
• Add-on module must be replaced
• Radio add-on module
not initialised (clock
wrong)
• Add-on module must be replaced