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Servicing and maintenance
12.3 Fuse replacement
12.3
Fuse replacement
Safety guidelines
Voltage hazards
Can cause death or serious injury
• The fuse board must only be disconnected and connected in the de-energized state.
• Before changing a fuse, you must isolate the load circuit from the supply and secure it
• Before working on the heating control system or the connected components, ensure the
NOTICE
Use only the prescribed fuse types (see section Ordering data (Page 200)). If you operate
the device with unapproved fuses, the device could be destroyed.
Removing the fuse board
To replace the channel fuses, the board on which the fuse to be replaced is located must be
removed from the POM.
NOTICE
ESD-sensitive components
Before you remove the board, note the ESD information in section ESD Guidelines
(Page 201).
Tool
You will need a Torx T8 screwdriver.
152
WARNING
against switching on again.
system is disconnected.
SIPLUS HCS4300 PROFINET/PROFIBUS DP
Operating Instructions, 10/2019, A5E35452705A/005
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