Checking Grid Monitoring Parameters; Removing The Sd Card - Viessmann Vitovalor PT2 Installation And Service Instructions For Contractors

Fuel cell module
(cont.)

Checking grid monitoring parameters

A
GEN
MNT
ITEM
ERR
GRD
DCT
Fig. 81
ITEM Meaning
81 AC undervoltage stage
83 AC overvoltage stage 1
84 AC overvoltage stage 2
85 Frequency drop stage 1
86 Frequency drop stage 2
87 Frequency rise
8a Islanding operation
8b Nominal voltage
8c Nominal current

Removing the SD card

The SD card is delivered already in place. Data stor-
age for the fuel cell module begins as soon the
Vitovalor PT2 is commissioned.
STATE
SET
B
Set value
184 V
262.2 V
237.7 V
47.5 Hz
47 Hz
52 Hz
1.0 Hz/s
230 V
3.26 A
Diagnosis and service checks
1. Remove cover .
A
2. On programming unit
the required display (81 to 8c).
In displays 81 to 8c, the set value and the
response time are shown alternately.
For an explanation of the displays: See the follow-
ing table.
Note
The Vitovalor has grid and system protection integra-
ted in the fuel cell module. The specified response
times consist of the settings for the protection relay
and the disconnection time of the coupling switch.
Response time
2.5 s
1.0 s
0.5 s
20.0 s
0.5 s
0.5 s
0.0 s
—
—
, use in ITEM to select
B
111