14
15
Display
Display level L9 – Current values
alt.
alt.
Max. temperature
Date
Period above limiting
value
Max. flow rate
Period > qp
Date
alt.
alt.
alt.
alt.
Displays
the level
Supply flow
Return flow
WMZ
Special operating states
Display
Description
Measures/Notes
• Communication credit of the
module interface or IrDA
exceeded
• Is eliminated after the credit pe-
riod (module = current day; IrDA
= current month) has been reset
automatically by the device
• The battery life has
expired.
• Device must be replaced
•
Wrong direction of flow
• Check installation (note arrow on
flow sensor)
• Check piping
• Check recirculating pumps and
thermostats for correct function
• Temperature sensors may
have been mixed up or fitted
incorrectly
•
Check whether flow sensor has
been fitted in the right strand or
• check type of installation of
temperature sensor
• Air in the measuring section
• No correct ultrasonic meas-
uring signal
• Bleed the pipe system
Error messages
Display
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
• Add-on module was
paired with another
meter before
• The module has the measuring data
of another heat meter
• Save data, since these are overwrit-
ten after a short time
• Press any key to delete the display
•
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