Viessmann VITOCAL 151-A Installation And Service Instructions Manual page 95

Message display on the programming unit
Subscriber numbers
PlusBus subscriber:
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 (M2IO electronics module)
64 SDIO/SM1A electronics module
CAN bus subscriber:
1 HPMU electronics module
45 Inverter
54 VCMU refrigerant circuit controller
58 Communication module (TCU 200/300)
59 HMI programming unit
67 EHCU electronics module
68 Communication module, Service Link (NB-IoT)
90 Gateway
Low power radio subscriber:
49 - 63 Vitotrol 300-E
Reading out messages from the memory (message
history)
The 10 most recent faults (including those remedied)
and service messages are saved and can be called
up.
Fault messages
Note
The possible faults vary according to the system
equipment. Therefore, not all fault messages will come
up for every system.
!
Please note
Refrigerant can escape when working on the
refrigerant circuit.
It is essential that regulations and guidelines
■
on handling refrigerant are always observed
and adhered to: See "Safety information".
■ Work on the refrigerant circuit must only be
carried out by a certified contractor (in accord-
ance with Regulations (EU) No 517/2014 and
2015/2067).
Specialist personnel working on a refrigerant
■
circuit with flammable refrigerant are required
to have specific qualifications and certification:
See "Safety information".
(cont.)
The messages are sorted by date.
Tap the following buttons:
1.
2. "Service"
3. Enter password "viservice".
4. Confirm with .
5. "Message history"
6. "Fault list" or "Service messages" to call up
saved fault messages.
7. if required, to delete the list.
8. to confirm
!
Please note
Repairing components that fulfil a safety func-
tion can compromise the safe operation of the
system.
■ Do not undertake any repairs on the inverter.
Replace the inverter if there is a defect.
■ Replace faulty components only with genuine
Viessmann spare parts.
Troubleshooting
95