Figure 15 Unlock the controller cover
8.3 Fuse replacement
Fuses are not user-serviceable items. The need for fuse replacement in controllers indicates severe
technical failure and is therefore considered to be a service activity. If a blown fuse is suspected,
contact Technical Support.
8.4 Battery replacement
The lithium ion backup battery is not user replaceable. Contact technical support for replacement.
Section 9 Troubleshooting
Refer to the expanded user manual on www.hach.com for troubleshooting information.
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