Bunn -O-MATIC ULTRA-1 Service And Repair Manual page 21

TROUBLESHOOTING (cont.)
Clean Filter Messages
"FILTER NEEDS
"MONTHLY FILTER
"FILTER NEEDS
CLEANING"
CLEAN REQUIRED"
!!!CLEANING!!!"
Freezing is Disabled
Hot gas thermistor
Hot gas thermistor
Monthly reminder
sensing over 250° F
sensing over 220° F
Dirty filter; air flow blockage;
Clean filter
wrong refrigerant or over charged
Hold ULTRA button for 3 seconds to reset. *
* Early units have to reset to factory defaults in order to reset
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