55
Tango 390-00322 7-2022
Screen Messages:
“No Communication – Touch to proceed”
ICU board unplugged
No software installed:
New ICU board, try loading software
Reset ICU Board:
Remove board, remove battery, Ground battery clip against lower
contact for 30 seconds. Wait 5 minute and Re-install the battery.
Install new battery CR1220:
Reset as above first
(See full instructions for resetting ICU at end of document)
Replace ICU
Left Milk Level Add Milk
ST/Ace:
2 gray jumper loops on CN1 bypass future milk level sensor
UNO/Solo
: 3 gray wires on CN1 must be jumped together (are located inside sleeve)
Brew group temperature reads ~ -630F
Temperature probe disconnected on rear of Turntable
Code 1 – No reading from Steam boiler filling probe during normal operation
Located in center top of steam boiler
Restricted water flow to machine
Filling Valve blocked
Valve driver board unplugged
Code 2 – Steam boiler filling timeout on startup (Pumps runs)
Restricted water flow to machine
Filling Valve blocked
Valve driver board unplugged
Code 3 – No reading from Steam boiler low level safety probe during normal op-
eration
Located on left top of steam boiler
Restricted water flow to machine
Filling Valve blocked
Valve driver board unplugged
Summary of Contents for UNIC TANGO ACE-ST DUO
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