Operating instructions

Brief scan Display

Open Therm extension (if installed)

Software

version

DHW heat-

ing status

External hook-up 0 - 10 V

Display in %

Checking outputs (relay test)

Weather-compensated control unit

1. Press OK and å simultaneously

for approx. 4 s.

2. "Actuator test"

The following relay outputs can be controlled subject to system design:

Display Explanation

Start base load Burner operates at minimum output; internal pump

starts

Start full load Burner operates at maximum output; internal pump

starts

Start internal output

Internal output sÖ (internal pump) enabled

Start valve heating Diverter valve set to heating mode

Start valve centre Diverter valve in central position (filling/draining)

Start valve cylinder Diverter valve set to DHW mode

Start htg circ pump HC2 Heating circuit pump output enabled (extension to heat-

ing circuit with mixer)

Open mixer HC2 "Mixer open" output enabled (extension to heating circuit

with mixer)

Close mixer HC2 "Mixer closed" output enabled (extension to heating cir-

cuit with mixer)

Start htg circ pump HC3 Heating circuit pump output enabled (extension to heat-

ing circuit with mixer)

Open mixer HC3 "Mixer open" output enabled (extension to heating circuit

with mixer)

Close mixer HC3 "Mixer closed" output enabled (extension to heating cir-

cuit with mixer)

Start outp. int. exten. H1 Output at internal extension enabled

Start AM1 output 1 Output A1 at extension AM1 enabled

Start AM1 output 2 Output A2 at extension AM1 enabled

Start EA1 output 1

Contacts P - S at plug aBJ for extension EA1 closed

Diagnosis and service scans

Diagnosis

(cont.)

5692 857 GB