espresso coffee machine - technician instructions
38
- english
R
23. MALFUNCTIONS and CORRESPONDING SOLUTIONS
Indication
Cause
Solution
MACHINE LACKING POWER
1) The machine power switch is in position “0” or “1”
2) The machine switch is defective
3) The mains power supply switch is in the OFF position
4) The connection to the electrical mains is defective
1) Replace the solenoid valve of the automatic level device
2) Replace the exchanger
NO WATER IN BOILER
1) The water mains tap is closed
2) The cut-off tap of the automatic level device is in the
closed position
3) The pump filter is clogged
4) The motor pump is disconnected or jammed
5) The water filling solenoid valve is defective
6) The water inlet solenoid valve filter is clogged
1) Open the water mains tap
2) Open the automatic level device tap
3) Replace the pump filter
4) Check the motor pump
5) Replace the water filling solenoid valve
6) Clean or replace the filter of the solenoid valve
TOO MUCH WATER IN THE
BOILER
1) The solenoid valve of the automatic level device is defective
2) The heat exchanger is perforated
1) Turn the machine power switch to position “2”
2) Replace the main switch
3) Place the mains switch in the ON position
4) Check for any defective connections
STEAM DOES NOT COME OUT
OF NOZZLES
1) The electrical heating element is defective
2) The pressure switch contacts are oxidized
3) The heating element protection thermostat has cut in
4) The nozzle sprayer is clogged
5) Machine switch in position “1”
1) Replace the electrical heating element
2) Clean the contacts or replace the pressure switch
3) Reset the heating element protection
4) Clean the steam nozzle sprayer
5) Turn the machine switch to position "2"
STEAM MIXED WITH WATER
COMES OUT OF THE NOZZLES
The boiler level is too high
Check the status of the level probe:
verify correct position and check for presence of any
surface lime scale
NO DISPENSING
1) No water mains
2) Group solenoid valve is defective
3) The pump is jammed
4) The control unit fuse is burned out
5) The injector is clogged
6) The group solenoid valve is clogged or dirty
7) The group filter is clogged
8) The volumetric dosing device is blocked
1) Check that there is water in the mains
2) Replace the group solenoid valve
3) Replace the pump
4) Replace the solenoid valve protection fuse (1A)
5) Clean or replace the injector
6) Clean or replace the solenoid valve
7) Clean or replace the filter
8) Check/replace the dosing device
WATER LEAKAGE
FROM THE MACHINE
1) The tub does not drain
2) The drain tube is broken or detached or has an
obstruction in the water flow
3) Hydraulic leaks in the hydraulic circuit
1) Check the sewer drain
2) Check and restore the connection of
the drain tube to the tub
3) Identify and eliminate any hydraulic leaks
COFFEE TOO COLD
1) The electrical heating element is defective
2) The electrical connection is defective
3) Lime scale on the exchangers and/or heating element
4) The pressure switch contacts are oxidized
5) The heating element protection thermostat has cut in
6) Machine switch in position “1”
7) In the CTS system, the lime scale has reduced the
circulation of water
8) The delivery group is cold
1) Replace the electrical heating element
2) Check for any defective connections
3) Clean the machine
4) Clean the contacts or replace the pressure switch
5) Reset the resistance safety device
6) Turn the machine switch to position "2"
7) Clean the connections of the exchanger, and clean or
replace the two circulation tubes
8) Eliminate air pockets in the hydraulic circuit in the following
manner:
- disconnect the electrical power supply to the pump
- close the water tap of the softener
-perform a dry delivery run for a few minutes
- reconnect the electrical power supply to the pump
- open the water outlet tap of the softener
- perform delivery until water comes out
- wait a few minutes for heating
