Schaerer Ambiente 2 Service Manual

Chapter 6 Control system diagram
SMSO-2-02.06- 15.07.03 219
6.5.31 Discharge valve – “steam, milk foam”
36V 5V DC

36V S L1, N
Operating condition
When milk foam is served the “steam, milk foam” outlet valve is open (closed at zero current).
Symptoms
The “steam, milk foam” outlet valve is not functioning.
Procedure
Process
step
Check Possible cause Remedy
1
Measure voltage at plug X39 3 on
power PCB:
36 V DC ?
 Check the voltage supply (see
“Power PCB, control voltage”)
 Voltage supply failure / faulty
2
Measure voltage at plug-in con-
tact stud (input) to outlet valve:
36 V DC ?
 Plug contacts on power PCB
faulty / oxidised
 Cable broken or pulled out of plug
 Flat plug not correctly connected
 Check / replace plug contacts
 Replace cable
 Re-connect the flat plug on the
plug-in contact stud
Resistance measurement at outlet valve:
 Switch off voltage
 Pull out cable from plug-in contact studs
3
Resistance measurement at outlet
valve;
Nominal resistance:
60 Ω ?
 Plug in contact studs oxidised
 Faulty coil
 Replace outlet valve
4
Voltage measurement X39 4,
GND
0 V DC ?
 Power transistor does not switch  Replace the power PCB
Reconnect the flat plug to the
outlet valve.
Function check: The valve must
open (audible click!)
 Cable (v) / power PCB faulty
 Mechanical fault on outlet valve
(calcium deposit)
 Replace cable / power PCB
 Replace outlet valve
NO
YES
YES
NO
NO
Y
ES
NO
Y
ES
NO

Schaerer Ambiente 2 Specifications

General

Brand	Schaerer
Model	Ambiente 2
Category	Coffee Maker
Language	English