Dr.coffee F20 - Abnormal NTC of Powder Boiler; Steam Boiler NTC Abnormality; Coffee Hot Plate NTC Abnormality

Rev 00
Dr.coffee Product Maintenance Manual 66
HMI
communicati
on
abnormality
a) The
communication line between the
main board and the display board
falls off or is damaged;
b)
The program version of main control
system and display system does not
match;
c) HMI board is damaged;
d) The main control board is damaged;
 Check the harness plug and plug
it
in again;
 Re-
upgrade the main control and
display system;
 Replace with a new HMI board;

Replace the main control board with
a new one;
5.1.7 Abnormal NTC of powder boiler
Name
Display prompt Reason Solution
Abnormal
NTC of
powder
boiler
a) The
connecting wire of NTC
temperature sensor of powder boiler
falls off or breaks;
b)
NTC temperature sensor of powder
boiler is damaged;
c)
The temperature of powder boiler
exceeds the upper limit of alarm;

Check the connecting wire and
reinstall or replace it;
 Re
place the NTC temperature sensor
with a new one;

Turn off the machine power and wait
for about 30 minutes before
restarting;
 Replace with a new powder boiler;
5.1.8 Steam boiler NTC abnormality
Name
Display prompt Reason Solution
Steam
boiler NTC
abnormality
a)
The NTC temperature sensor of the
steam boiler and the connecting
wire fall off or break;
b)
The NTC temperature sensor of steam
boiler is damaged;
c)
The steam boiler temperature
exceeds the alarm upper limit;

Check the connecting wire and
reinstall or replace it;

Replace the NTC temperature sensor
with a new one;

Turn off the machine power and wait
for about 30 minutes before
restarting;

Replace the steam boiler with a new
one;
5.1.9 Coffee hot plate NTC abnormality
Name
Display prompt Reason Solution