Marco Beverage Systems Ecoboiler UC45 1000743, Service Manual

Page: 7 / 28

Service manual April 2017 Ecoboiler UC45 Page 7 of 28
3.5. T ROUBLESHOOT ING
The Ready/Status light signals various errors or problems.
A cycle of red flashes indicates an error. The number of flashes in a cycle corresponds to the
symptom in the table below:
Status/Diagnostic light guide:
No of
flashes
Symptom Action required
2
Water level below elements. Normal
when machine first fills.
Check water pressure , if this is OK then call
service agent.
3 Temperature sensor failure (s/c) Call service agent
4 Water not heating Call service agent
5 Temperature sensor failure (o/c) Call service agent
6 Machine not filling Check water pressure.
Note: Some of the error sequences will be displayed if there is lo w water pressure.
Please check that there is wa ter pressure and that the water stop -v alve is open
before calling your serv ice agent.
For a more detailed description of error indicators and correctiv e actions see section
4.7 of this manual.
2 FLASH CYCLE
– BELOW LOW LEVEL
Display pattern:
•
2 flashes then a short pause - repeated.
Electronic check
and action:
•
This indicates that the low level circuit is open i.e. the probe is not in
contact with the water.
•
The element is switched OFF at this stage and the inlet is left ON.
•
(note that if this is a low probe wiring fault, the water will stop at the high
level probe regardless of the status of the low level).
•
This is a recoverable error i.e. the machine does not need to be reset
when the problem is solved. (e.g. if a closed mains water stop valve is
the problem, opening the valve will allow water into the machine and
normal function will resume when the low level probe is reached)
Probable causes:
•
The water level is below the low level probe, which is normal when the
machine fills for the first time. (Can be flashing at start up when the
machine is empty)
•
The low level probe wire is disconnected, or there is another wiring fault
(eg. a bad earth (return) connection between the PCB and the Tank)
Action required:
•
Check that the water pressure is OK and ensure that the stop valve is
open.
•
Check that the inlet solenoid is working.
•
If the water level is above the level of the low probe, check the probe
circuit wiring