Converting The Gas Type On The Fuel Cell Module - Viessmann Vitovalor PT2 Installation And Service Instructions For Contractors

Starting maintenance mode
Note
If the fuel cell module does not immediately enter
maintenance mode (e.g. in the shutdown phase), wait
until maintenance mode is active.
The following displays appear when maintenance
mode is active:
On condensing module programming unit:
■
"Maintenance mode ON" under
"Fuel cell"
■ At the fuel cell module programming unit:
The "MNT" indicator lights up.
Tap the following buttons:
1.
Programming unit on the fuel cell module
Some settings for commissioning and maintenance
can only be made using the programming unit on the
fuel cell module.
Removing the programming unit cover
Fig. 66

Converting the gas type on the fuel cell module

Delivered condition: Gas type "E"
Conversion is only required for operation with gas type
"LL".
(cont.)
2.
3. "Maintenance mode ON"
4.
Note
The parts required for fuel cell module maintenance
"Information", are available as a maintenance pack.
Note
The parts required for fuel cell module maintenance
are available as a maintenance pack.
Programming unit
L
K
H
G
F
Fig. 67
Function display
A
Status
B
Commissioning indicator (flashing or constant)
C
Confirm the selection/adjusted value.
D
E Select/adjust value
No function
F
Power supply indicator
G
Fault indicator
H
Commissioning/maintenance indicator
K
Power generation indicator
L
Note
The display switches off when, in standard mode
(economy mode), no input has been made for 1 min.
When a button is pressed, the display switches back
on.
Note
An incorrectly set gas type can result in faults on the
fuel cell module.
Commissioning, inspection, maintenance
"Fuel cell"
to confirm
GEN
MNT
ITEM STATE
ERR
GRD
SET
DCT
A
B
C
D
E
73