Rehau NEA HT 24 V Mode D'emploi page 53

Display messages
A
B-D
A
Frost protection is active
B
Er 4 – Room temperature out of sensor range
C
Er 5 – Interruption of room temperature probe
D
Er 6 – Short circuit of room temperature probe
Frost protection display will remain
until any key is pressed
General function information
Valve protection
To protect the valves the output is turned on
for 5 minutes in every week This function
stops the valve from getting stuck due to
long periods of inactivity
R
Pulse width modulation
Room temperature control is achieved by
opening and closing the circuit control
valves for defined times The opening time
of the valves is determined by the required
energy supply
PI control
The PI control adjusts the control signal
gradually to the demand of the system, in
order to optimize the control result This
optimization must be applied very cautiously
in case of surface heating and cooling
Cleaning your Nea
Only use a soft, dry, solvent-free cloth for
cleaning
A blown fuse can indicate an error
within your system Before replacing
the fuse, the system must be checked by
an authorized specialist
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