THIS RESERVE SHOULD BE SUFFICIENT TO COVER
POWER INTERRUPTIONS DURING THE LIFE OF THE UNIT.
The timeswitch is fitted with a non-rechargeable, non-
serviceable long life battery, which will maintain the clock and
programmed time settings with the mains supply disconnected.
During power interruptions the display will be blank.
This timeswitch is NOT user serviceable. Please do not
dismantle the unit. In the unlikely event of a fault developing
please refer to the RESETTING THE CHANNELPLUS H17XL
section on page 15. If this fails to resolve the problem please
contact a local heating engineer or a qualified electrician.
Service and Repair
Battery
General Information
14
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