Viessmann B2HF - Calling up messages (message history); Checking outputs (actuator test)

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The messages are sorted by date.
Tap the following buttons:
1. " "
2. "Service"
3. Enter password "viservice".
4. Use to confirm.
5. "Message history"
The following is displayed in the message lists:
■
Date and time of the occurrence of the notifica-
tion
■
Notification number
■
Description of the notification
■
Subscriber number of the component on which
the message has occurred:
PlusBus subscriber components
0 EM-S1 extension (ADIO electronics
module)
1 - 15 EM-M1, EM-MX and EM-P1 extensions
(ADIO electronics module)
17 - 31 EM-EA1 extension (DIO electronics
module)
32 - 47 Cylinder module (electronics module
M2IO)
49 - 63 Vitotrol 200-E
64 SDIO/SM1A electronics module
CAN BUS subscriber components
1 HMU heat management unit
50 BCU burner control unit
58 RF module (wireless module)
59 HMI programming unit
60 Fan unit
90 Gateway
Low power radio subscriber components
49 - 63 Vitotrol 300-E
6.
■
"Faults" to call up saved fault messages. For
further details, see the following chapter "Fault
messages".
■
"Service messages" to call up saved service
messages.
P.1 Maintenance due after interval
P.4 Top up heating water.
P.8 Maintenance due after burner hours run.
■
"Status", to call up the saved status messages.
S.60 Summer mode active (outside temperature
economy function)
S.74 Heating suppression, heating
S.75 DHW circulation pump active
■
"Warnings" to call up saved warning messages.
A.11 System pressure has fallen below the
standard range
Measure: Check system pressure and dia-
phragm expansion vessel. Check settings
for set system pressure and range in the
commissioning assistant.
A.12 Real time clock battery flat.
Measure: Replace the battery
(type CR2032) in the HMU heat manage-
ment unit.
A.18 Possible condensate backup in the heat
cell
Measure: Check the combustion chamber
and condensate drain.
A.20 Service interval could not be activated.
Measure: Check the time and date set-
tings.
A.21 System pressure has exceeded maximum
pressure.
Measure: Check safety valve and dia-
phragm expansion vessel.
On combi boilers: Check plate heat
exchanger
■
"Information", to call up saved service informa-
tion.
I.56 External demand active
I.57 External blocking active
I.59 Parameters have been restored (parameter
set was flashed to BCU electronics mod-
ule).
7. If you wish to delete the messages, tap .
8. to confirm
Checking outputs (actuator test)
Note
When the actuator test is started, all actuators are ini-
tially disabled and valves moved to their central posi-
tion.
Tap the following buttons:
01. " "
02. "Service"
03. Enter password "viservice".
Diagnosis and service checks
Calling up messages (message history)
5593201
Diagnosis