Testing Outputs (Relay Test) - Viessmann VITOCROSSAL Service Instructions Manual

Diagnosis and service scans
Diagnosis, constant temperature control unit
Brief scan
F
8
F Software ver-
sion
9

Testing outputs (relay test)

1. Press OK and simultaneously for approx. 4 s.
å
" " flashes on the display.
Ü
2. Use to select " " and confirm with OK.
Ú
3. Select required actuator (output) with
following table):
The following actuators (relay outputs) can be controlled subject to system design:
Shown on display
0
1
2
3
10
15
16
17
18
19
20
21
22
66
OpenTherm extension (if installed)
DHW heating sta-
tus
/ (see
V v
Explanation
All actuators are off.
Burner operated at minimum output; circulation pump is started.
Burner operated at maximum output; circulation pump is started.
Output sÖ active (boiler circuit pump)
Internal extension output active
Solar circuit pump output
Solar circuit pump output on solar control module SM1 switched to minimum speed
Solar circuit pump output on solar control module SM1 switched to maximum speed
Output on solar control module SM1 active
sS
Contact P - S at plug
aBJ
Output A1 at AM1 extension active
Output A2 at AM1 extension active
Output active (circulation pump for cylinder heating)
sA
(cont.)
Shown on display
Solar central
heating backup
0: Disabled
1: Enabled
External hook-up 0 - 10 V
Display in %
4. Confirm selected actuator with OK.
The display shows the number for the activated
actuator and "ON".
on solar control module SM1 active
sF
of EA1 extension closed
Output 22 switch-
ing state
0: OFF
1: ON