WMF 800 - Power Supply

Engin eering
© WMF800 / 900 / 1000S / 1000proS Edition 07/2014 - KMT
T2-46
2/8.2 Power supply
The power supply is connected with aplug to the controller. The controller supplies
the transformer. The transformer delivers voltage for:
• A 12V part for supplying the logic,
• A 24V part for the 24V loads such as, for example, the magnetic piston pump, fan,
air pump, heat relay,
There are various inputs and outputs on the CPU board; see table.
Toroidal transformer
Switching on the 12/24V supply for the coffee machine:
 Turn on the ON/OFF switch on the operator control panel
 Via the 5V power supply input the controller switches on
Technical data: toroidal transformer
5.1V voltage oadable up to 1A
24V voltage oadable up to 7A
Mains input Nominal voltage 230V (as delivered)
ornominal voltage 120V
maximum voltage compliance at 230V 175 - 26 4V
Line frequency 47 - 6 3Hz
Technician instructions
If the 5V supply is overloaded, the coffee machine switches off because the controller
has no power.
If the internal device fuse has tripped, as arule the power supply is defective and the
power supply must be replaced.
Error without display message
• No 12V and no 24V available for controller
• No 5V available
See troubleshooting chapter part 6