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Status displays
Display
Operating state display
Display
EN
42
MU2H-0491ge23 R1217
Description
The data displayed apply for:
• Heat
• Cool = Cold
• (empty) = Displayed value is the current value
• M (Memory) = Value on a monthly or due date
Displayed value is a date value:
• Day = Current date
• M-Day = Date applies for a saved annual or monthly value
Displayed value is a checksum:
• Check = Checksum refers to the current consumption value
• M-Check = Checksum is valid for a saved annual or monthly value
• Current flow available
• No energy counting -> no temperature difference
• Current flow available
• Energy counting
• IrDA communication is currently active
Description
• Communication credit
of the module interface
or IrDA exceeded
• Operating time
expired
• Flow direction in-
correct
• Temperature sensors
have been mixed up or
fitted incorrectly
• Imp1 = Impulse input 1
• Imp2 = Impulse input 2
Measures/notes
• Is eliminated after the credit period
(module = current day; IrDA = current
month) has passed
• Device must be replaced
• Check installation
(note arrow on flow sensor)
• Check piping
• Check recirculating pumps and
thermostats for correct function
• Check whether flow sensor has been
fitted in the right strand or
• check type of installation of
temperature sensor
V2.0 / 21.12.17
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