Rancilio EGRO 55 Series Technical Manual page 49

3.8 ERROR LIST - CONTINUED
3.8 ERROR MESSAGES -continued
NO. DESCRIPTION
93 Lower piston (P2) can not reach it's
maximum height.
94 Lower piston (P2) height has
exceeded it's maximum height
during brewing. (Motor exceeded
100 revolutions)
97 No signal from upper piston (P1)
limit switch (S14)
98 No signal from lower piston limit
switch (S14).
111 Short circuit on temperature sensor
for coffee boiler (NTC B1)
121 Failure of the temperature sensor for
the coffee boiler (NTC B1)
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a. Check lower spindle motor (M8) - use monitor menu
b. Revolution counter (S16) is faulty
a. Check lower piston spindle motor - use monitor menu
b. Revolution counter (S16) is faulty
c. Increase upper piston height (P1) by 2 in Confi g 1 menu, P1 Turns parameter
a. Check the upper spindle motor (M7) - use the monitor menu
b. Revolution counter (S14) is faulty
c. Check fuse F5
a. Check the lower spindle motor (M8) - use the monitor menu
b. Revolution counter S16 is faulty
a. Check wiring to sensor
b. Check the J11 Pin 1/2 connection on the mainboard
a. Check wiring to sensor
b. Check the J11 Pin 1/2 connection on the mainboard
- Section 3: Page 24 -
EGRO 55 SERIES TECHNICAL MANUAL
SOLUTION
E55_TM_programmingV3