Page 58
Electrical tests
Service Manual Deli Multisserie form 9123560 rev. 02/2017
0
∞
Ω
∞
0 Ω
0
∞
Ω
necting it to the mains supply (208V~). The same spark
must arise. Do this a few times. The capacitor will not
be charged when the leads are disconnected during
the “zero crossing” of the mains sinus. It is ok when a
spark arises once.
Measuring with an Ω meter.
Be sure that the capacitor is empty!
The value will go up until
∞
Ω is reached.
Exchange the test leads. The value will go down,
through “0” and up again.
If not, the capacitor is broken.
If ok, it is still not sure if the capacitor is ok. It might
leak when it is connected to the mains power!
Active measurements.
You are about to measure on a 3 phase 208V~ circuit!!
You need to be qualified for this! Always work accor-
ding local legislations!
For measuring on the transformer terminal block:
• Use short test probes or-
• Unscrew the terminal block and turn it outwards
or-
• Turn out the glass panel.
Switch on the unit .
Voltages that can be expected in normal situation.
All voltages are related to a line voltage of 208V~
Blowers in high speed (speed 2 in cooking program):
• On the screw terminals of the blowers: 195V~
On the terminal block
• Between Red (4) and Yellow (5):
195V~
• Between Red (4) and Orange (3):
160V~.
Blowers in low speed (speed 1 in cooking program):
• On the screw terminals of the blowers: 170V~
On the terminal block
• Between Red (4) and Yellow (5):
204V~
• Between Red (4) and Orange (3):
170V~.
Trouble shooting with help of the I/O test facility .
• Open the settings menu
• Choose service and give in the pin code 4878
• Select “I/O test” and choose MFMB outputs.
2 keys are available to test the blower outputs. The “X”
numbers relate to the corresponding outputs on the
circuit boards.
X3 is the relay that switches high and low speed. “1” is
low speed. (mentioned wrong on the screen!)
X6 Switches full power on the transformer.
First choose the speed on X3 and then switch on the
blower with X6
V~
195 V~
170 V~
Speed 2 ->
Speed 1 ->
V~
160 V~
170 V~
Speed 2->
Speed 1->
V~
195 V~
204 V~
Operator menu
Program menu
Settings
menu
Switching ON
Push 3 seconds
Switching OFF
push 3 sec. simult.
*
Charging with a test cable
Checking with an Ω meter
1 sec.
