Schaerer Ambiente 2 Service Manual

Chapter 6 Control system diagram
SMSO-2-02.06- 15.07.03 213
6.5.25 Steam generator heating, 3kW
36V 5V DC

36V S

L1, L3, N
Operating condition
With correct voltage supply steam is produced inside the steam generator (note warming up time!)
Symptoms
The steam generator is not functioning. The “timeout H.steam” message displays.
Procedure
Steps 1-4 Relay 9 and the load relay are triggered for approximately 4 seconds in the initial test. The measurement
must be made during this time.
Process
step
Check Possible cause Remedy
1
Take voltage measurement at the
connection terminals to the ma-
chine:
L1, N = mains voltage ?
L3, N = mains voltage ?
 Check the mains connection (see
“mains connection”)
 Fault in mains connection
2
Measure voltage at power PCB
input at control fuse F1:
Input (top), N
Mains voltage ?
Output (bottom), N
Mains voltage ?
 Cable broken or pulled out of
terminal / plug
 Plug contacts on power PCB
(input) faulty / oxidised
 F1 fuse faulty
 Replace cable or reinsert it into
the terminal
 Check / replace the plug contacts/
cable
 Replace fuse F1
3
Check control voltage:
X47, N1 – relay 9, L3
Mains voltage ?
X47, N1 – relay 9, steam 1
Mains voltage ?
X47, N1 – power relay 1
Mains voltage ?
 Power PCB defective
 Relay 9 faulty
 Faulty or oxidised cabling / plug
 Replace the power PCB
 Replace the power PCB
 Check / replace cabling
4
Take voltage measurement at
power relay (power circuit):
Input (2), N
Mains voltage ?
Output (4), N
Mains voltage ?
 Cable broken or pulled out of
terminal / plug
 Faulty power relay
 Replace cable or reinsert it into
the terminal
 Check / replace the plug contacts
/ cable
 Re-connect the flat plug on the
plug-in contact stud
 Replace power relay
5
Take voltage measurement at
Klixon input: Mains voltage ?
 Cable broken or pulled out of plug
 Flat plug not correctly connected
 Check / replace the plug contacts/
cable
 Re-connect the flat plug on the
plug-in contact stud
6
Take voltage measurement at
Klixon output: Mains voltage ?
 Electrical circuit interrupted by
safety thermostat; check machine
for any faults.
 Correct the fault; then reset (press
the red knob).
Resistance measurement at heating cable lugs
 Switch off voltage
 Pull out cable from plug-in contact studs
7
Measure resistance at heating;
nominal resistance: 17 Ω ?
 Faulty heater  Replace the steam generator (see
section 5)
Restart the machine
If the “timeout H. steam” message
continues to display:
 Faulty unit control system  Replace unit control system
NO
YES
NO
NO
NO
YES
NO
NO
NO
NO
YES
NO
YES
YES
NO
NO
Y
ES
YES

Schaerer Ambiente 2 Specifications

General

Brand	Schaerer
Model	Ambiente 2
Category	Coffee Maker
Language	English