How To Replace The Control Board - Dantherm HEX 70 Service Manual

How to replace the control board

Introduction This section shows you how to replace the control panel.
When to replace
Only replace the control board when faulty.
Tools Make sure you have the following tools available before you start:
 Torx 20 screw driver
 Straight slot screw driver for power plug
 Only trained and certified technicians are allowed to replace parts
Caution!
 Switch of the DC supply before working on the unit
 Make sure that all work has been performed correctly before switching the power
Illustration This illustration shows the control board
and where it is placed in the unit:
Procedure Follow these steps to replace the control board:
Step
back on
1 Switch of all the power to the unit
2 Loosen the two straight slot screws on the power plug and remove the pow-
er plug from the controller
3 Remove the four torx 20 screws that hold the controller
4 Take out the controller by turning it to the left
5 Remove the two four-way multi plugs from the controller
6 Mount a new controller by following step 2 to 5 reversed and in opposite or-
der
7 Connect power
The test program runs through all functions.
Make sure the unit does not come out with an alarm signal.
In case of an alarm signal, please see please see "Preventive maintenance"
on page 12.
Action
19