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Troubleshooting
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58
9.7
Replacing the device fuse
Warning!
Risk of electric shock.
Exposed components carry dangerous voltages. Make sure that the power supply is switched off
before you remove the cover of the electronics compartment.
The device fuse is located on the electronics board (→ å 36).
The procedure for replacing the fuse is as follows:
1.
Switch off power supply.
2.
Unscrew cover of the electronics compartment from the transmitter housing.
3.
Press the side latches and flip down the cover of the connection compartment.
4.
Remove the connector for the power supply (a).
5.
Replace device fuse (b). Only use the following fuse type.
Use only fuses of the following type:
– Power supply 11 to 40 V DC / 20 to 28 V AC → 1.6 A slow-blow / 250 V TR5
– Power supply 85 to 250 V AC → 1 A slow-blow / 250 V TR5
6.
Installation is the reverse of the removal procedure.
Caution!
Use only genuine Endress+Hauser parts.
Fig. 36:
Replacing the device fuse on the electronics board
a
Connector for power supply
b
Device fuse
Proline Prosonic Flow 91
a
b
a0005832
Endress+Hauser
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