Viessmann Vitodens 200 Start-Up/Service Instructions page 39

Vitodens 200 WB2 Service
Correction
(continued)
With comfortrol menu driven progamming unit
Relay test
Open cover:
Menu option
SYSTEM
INSTALLER SETUP
CODE PLEASE:
DIAGNOSIS
RELAY TEST
Select required relay to check its function with the menu
option CONTINUE "A" (see below).
Note: Those relays which are not mentioned have no
significance. When the relay is selected, only the
corresponding unit is addressed. If no call for heat
is present, the burner is omitted from the relay test.
For installations with Dekamatik-HK mixing valve
control, refer to the Dekamatik-HK control manual.
Display
01 – 1st stage burner
<PL41> ON
02 – Heating circuit
pump A <PL20> ON
03 – Heating circuit
pump B <PL20B> ON
04 – DHW pump
<PL21> ON
05 – Not assigned
06 – Not assigned
07 – Mixing valve HC B
<PL52B> CLOSED
08 – Mixing valve HC B
<PL52B> OPEN
10 – Modulation
<PL90> CLOSED
Burner <PL41> ON
11 – Modulation
<PL90> OPEN
Burner <PL41> ON
13 – Additional heating
pump <PL28> ON
14 – Alarm output
<PL56> ON
*1 Only in conjunction with mixing valve extension kit
*2 If no low-loss header is installed, pump will be
operated as a DHW recirculating pump (see coding
addresses "099" and "0B8").
If a low-loss header is installed, the pump will operate
as a heating circuit pump (see coding address "0B8").
*3 Only in conjunction with expansion board (optional)
Troubleshooting
Button
"D"
"C"
"B-C-C-B"
"A"
"A"
Meaning
Without function
(Burner on, pump not running)
Circulating pump
Heating circuit pump with
extension kit with mixing valve
DHW heating pump
--
--
Mixing valve CLOSED*1
Mixing valve OPEN*1
Burner (min. input)
Circulating pump
Burner (max. input)
Circulating pump
Additional heating pump*2
Alarm output*3
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