71
12.
Once you have checked that the cable connection between main and switch circuit
board is sound and, likewise that problems are not being caused due to a break in
the cable or a bad connection, replace the circuit board. First, remove plugs from old
circuit board and plug them into the new one in the same way.
Now, manually close the safety switch and holding the switch circuit board around
the edges, press the lower left pad (on-ff switch. It works? If yes = go to point 13 of
this section. If no =go to point 18 of this section).
13.
As far as it can now be seen, having replaced the old circuit board with a new one,
the machine functions appear to be working. Re-engage the safety switch to exclude
power to machine and re-assemble the new circuit board in its casing.
When repositioning the circuit board in its frame, proceed with caution and move
the switch pads and leds very carefully to reposition them. If required, bend the leds
very gently. Do not use force! Caution: breakage and damage hazard!
14.
After the circuit board has been mounted in the switch control panel, replace the
front panel and screw tight from below. However, first make sure that the flat cable
is sitting unobstructed at the back.
15.
Reconnect the 8-pole plug terminal to the main circuit breaker.
16.
Next, test run the machine; replace the upper cover but do not screw into place. Fill
coffee grinder hopper and water container.
17.
Reposition in its housing (the safety switch should be at the end position so that
power is delivered to machine). Switch the machine on. Let the machine warm up.
When the initially flashing leds for >> hot water<< (or steam) und >>coffee
brewing<< remain permanently on, it is possible to carry out a complete check of all
functions. Follow operating instructions.
When al machine functions are working correctly, the upper cover can be screwed
back into place. The repair has been successfully carried out.
If not all machine functions are working or processes are irregular, then the main
circuit board needs to be replaced; in this case, move onto point 18 to review the
procedure for replacing the main circuit board.
18.
Installing a new main circuit board.
If, after having replaced the switch circuit board, not all functions are working
correctly, and, in particular, the initial fault still has not been resolved, then the main
circuit board needs to be replaced. To replace the main circuit board a significant
section of machine needs to be disassembled. Therefore, make sure you have a good,
clear working space.
Summary of Contents for SUPREME DED400XP1
Page 1: ...EXPRESSO DED400XP1 ...
