53
Troubleshooting
Type 8746 Profibus, 8746 Analogue
12.3.4
Replacement product adopts none of
the values from the defective product
Identify the cause to solve the problem:
1.
The article number of the replacement product is different
from the article number of the defective product.
→
Use a replacement product that has the same article number
than the defective product. Values can only be transferred
between products with the same article numbers.
2.
The memory card is defective. The product could not write
any values to the memory card.
→
Replace the memory card. Refer to chpt.
12.3.5
Replacement product does not adopt
all of the values from the defective
product
The product description of the replacement product is different
from the product structure of the defective product. Only the
existing values of the defective product can be adopted by the
replacement product.
→
Use the Bürkert Communicator software to configure the new
values of the replacement product. To connect the product to
the Bürkert Communicator software, refer to chpt. 10.4
12.3.6
No mass flow rate (MfM)
The pipes are too large or not yet fully vented.
→
Vent the pipes.
→
Change the pipe diameter.
12.3.7
No mass flow rate (Mfc)
Identify the cause to solve the problem:
1.
The product is possibly running one of the functions described
in chpt. 10.9 Choose the source giving the set-point value
(MFC). The product is not in the normal operating mode. Refer
to chpt. 10.7
.
→
Wait until the product goes back to the normal operating
mode.
2.
The pipes are too large or not yet fully vented.
→
Vent the pipes.
→
Change the pipe diameter.
3.
The set-point value is lower than the zero-point shut-off limit.
→
Increase the set-point value until it is higher than 2% of the
nominal flow rate.
12.3.8
Unstable measured value (MfM)
You have not connected the functional earth (FE) properly.
→
To connect the functional earth, use a green-and-yellow cable
that is as short as possible. And the cable cross-section must
be at least equal to the cross section of the power supply
cable. Refer to chpt.
English
Summary of Contents for 8746
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