Display Messages; General Function Information; Pulse Width Modulation - Rehau NEA HCT 24 V Instrucciones De Manejo Y Guía Rápida De Montaje

Display messages

A
B-G
A
Frost protection is active
B
Er 1 – Remote temperature sensor out of sensor
range
C
Er 2 – Broken floor sensor
D
Er 3 – Shorted floor sensor
E
Er 4 – Room temperature out of sensor range
F
Er 5 – Interruption of room temperature probe
G
Er 6 – Short circuit of room temperature probe
R
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

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
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