136
The following information is displayed:
■
Date and time of the occurrence of the fault
■
Fault code
■
Short description of the fault
■
Subscriber number of the component affected: See
the following lists.
Note
When troubleshooting, always observe the sub-
scriber number of the component.
Check the component displayed. Remedy fault if
required. The subscriber number of the component
depends on the position of rotary switch S1 on the cor-
responding extension module. The rotary switch was
set during installation.
To identify the extension module affected, check the
setting of rotary switch S1 on the extension module in
question, if required.
Subscriber numbers
PlusBus subscriber:
0 EM-S1 extension (ADIO electronics module)
1 - 15 EM-M1, EM-MX, EM-P1 extensions
(ADIO electronics module)
17 - 31 EM-EA1 extension (DIO electronics module)
32 - 47 M2IO electronics module
64 SM1A extension (SDIO electronics module)
67 EM-HB1 extension (HIO 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)
71 to 84 Other Viessmann devices in the system net-
work
90 Gateway (KNX, BACnet, Modbus)
97, 98 Energy meter
Low power radio subscriber:
49 - 63 Vitotrol 300-E
Troubleshooting measures
Descriptions of the messages and actions required are
available online:
https://link.viessmann.com/tdoc/6200041
Fig. 88
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".
!
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
Message display on the programming unit (cont.)
6222080
Diagnosis
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