U-Line UCBF659-SS12A User Manual page 57

Blast Chiller Touch Screen Manual
This is the list of all alarms event that may occur during operation, along with
recommendation on how to solve them.
ALARM: DOOR
The door is open for more than the allowed time during a cycle.
ALARM: MAINTENAINCE
It's just a reminder to perform a regular service inspection and preventive
maintenance. Call your A.S.A. for more information.
ALARM: CONDENSER HIGH TEMPERATURE
It means that the condenser temperature is to high if compared to a normal
working condition, defined by a temperature threshold. In this version of Blast
Chiller the alarm is not enabled, as the condenser probe is not installed.
ALARM: EVPORATOR LOW TEMPERATURE
It means that the evaporator temperature is too low if compared to the current
setpoint temperature. There is a differential parameter LBT that states the
maximum gap that should exist between setpoint temperature and evaporator
temperature. The alarm may occur in some occasion when there is a big
change of setpoint temperature during a multistep automatic recipe, the
evaporator temperature remaining low for some minutes and hence triggering
the alarm. This alarm it's not a critical one, however it could be avoided by
setting LBT as high as possible (i.e. 40°C-72°F).
ALARM: DEFROSTING TIME
Means that the defrost process has not terminated within the maximum
defrosting time. The defrost normally ends by coil temperature (DTE). If this
doesn't happen within DTO minutes then the alarm triggers. Check the
evaporator coil icing status, one defrost may be not enough, then repeat the
defrost. If the alarm occur during the holding cycle there may be a problem
with the defrost device (hot gas valve). Using the Blast Chiller as an holding
cabinet for a long time may reach to this alarm too.
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