Service And Repair - Horstmann Electronic 7 User Operating Instructions Manual

Service and Repair

The Horstmann Electronic 7 is not user serviceable, so please do not try to
dismantle the unit.
In the unlikely event of a fault developing try resetting the unit, which is in this
manual under "RESETTING THE UNIT". If this fails to resolve the problem
then please contact your installer or a local heating engineer or a qualified
electrician.
Questions
(Q) There is no display on the screen?
(A) Ensure there is mains supply getting to the unit and that the battery switch
on the rear of the unit is in either the GMT/BST or GMT ONLY position.
(Q) The display has become frozen?
(A) This could be due to local electrical interference. Using the RESET
procedure in this manual may rectify the fault.
(Q) The neon indicator will illuminate but there is no hot water?
(A) Ensure the SWITCHED OUTPUT switch is in the TIMED position. If this still
fails to rectify the problem please contact a local heating engineer or a qualified
electrician.
(Q) How do I change the back-up battery?
(A) You can't as it is an integral part of the unit, and therefore would invalidate
your guarantee if you dismantled the unit.
(Q) I want to adjust my off-peak times, how is this achieved?
(A) Please go to "SETTING OFF PEAK PERIODS" in this manual.
(Q) What does the indicator next to the word "TIMED BOOST" mean?
(A) If there is an indicator next to this word on the right hand side of the screen,
then this means the boost programme is selected. Please see "BOOST
PROGRAMME" in this manual.
(Q) Why are there 4 black squares showing in the display?
(A) The security feature has been engaged on installation to stop any
programme settings being altered by the user.
(Q) I cannot alter the programme times set into the Electronic 7.
(A) The programme security feature may have been engaged. This is shown
by 4 black squares showing in the display.
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