8
Displays / operation
Info codes
Code Meaning
F-1 Temperature sensor faulty. Exchange the device and return it.
F-4 Flow sensors faulty. Exchange the device and return it.
F-5 Heat meter measures faultlessly. - In order to save electricity, the optical interface is tempo-
rarily out of operation.
F-6 The flow direction of the volume measuring section is incorrect. Check the installation
direction.
C-1 The meter has a permanent fault and must be replaced. The readout values cannot be used.
Display levels
The heat meter has two display levels - the readout level and the service level.
A long press of the button switches between the display levels. A short press of the
button jumps to the next display Î
2
.
!
In the device number display, the number next to the display identifier is the first
digit of the device number.
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