MR MSENSE DGA 2 - Other Faults; Replace Safety Fuse

9 Fault elimination
Messko GmbH 202066 BA4001150/10 ENMSENSE
®
DGA 2/3
The following faults are recorded via the safety switching contact FSR:
Characteristic/detail Cause Remedy
Message via FSR Cable break in the supply
line
Check wiring, in the event
of doubt contact MR Ser-
vice & Complaint
Drop in the supply voltage Check supply voltage, in
the event of doubt contact
MR Service & Complaint
Hardware overheating
(µC)
Check ambient tempera-
ture, in the event of doubt
contact MR Service &
Complaint
Hardware failure at the
component level (HW)
Contact MR Service &
Complaint
9.2 Other faults
Characteristic/detail Cause Remedy
Display no longer shows
events
Display fault Check wiring. If OK: Inter-
rupt supply voltage for 5
seconds. This activates a
restart.
Display without function Safety fuse defective Follow the instructions in
the "Replacing a
fuse" [►Section 9.3, Page
66] section
9.3 Replace safety fuse
The device is fused with a safety fuse.
This can be replaced by a replacement fuse (500 mA, 500 V, 5x20mm, de-
layed-action) if needed.
WARNING
Electric shock
Risk of fatal injury due to electrical voltage
► Only appropriately trained personnel may replace the fuse.
► Before opening the connection area in order to replace the fuse, the de-
vice is to be disconnected from all voltage sources via the prescribed dis-
connecting switch and secured against reconnection. The device must be
grounded.
In order to replace the fuse, proceed as follows:
1. Disconnect device from all voltage sources.
2. Open the device connection area. To do so, unscrew the 4 captive screws
on the housing cover. The cover is connected to the device via hinges and
can be flipped open.