Viessmann VITOPEND 200 - Checking Outputs (Relay Test)

Weather-compensated control unit
Press the following keys:
1. K + d simultaneously for
approx. 2 s.
2. a/b for the required relay out-
put.
3. d Relay test is completed.
The following relay outputs can be controlled subject to system design:
Display screen Explanation
Base load Burner modulation base load
Full load Burner modulation full load
Intern. pump On Int. output 20
Htg. system valve Diverter valve set to heating mode
Valve in middle pos. Diverter valve in central position (filling/draining)
DHW valve Diverter valve set to DHW mode
Htg.cir.pump M2 On Mixer extension
Mix.valve open Mixer extension
Mix.valve closed Mixer extension
Intern.output On Internal extension
Htg.cir.pump A1 On External extension
Centr.fault ind.On External extension
Scanning operating conditions and sensors
Constant temperature control unit
Press the following keys:
1. c press.
2. a/b for the required operating
condition.
3. d Scanning is completed.
The following operating conditions can be scanned, subject to the actual
system equipment level:
Display screen Explanation
1 15 °C/°F Actual outside temperature
3 65 °C/°F Actual boiler water temperature
5 50 °C/°F Actual DHW temperature
P Burner hours run (after a service, reset with e to "0")
263572 h
Checking outputs (relay test) (cont.)
75
Service scans
5862 831 GB
Service