Rev 07/04/2015
34
2.1.
ALARM/FAILURE LIST
ALARM MESSAGE
NOTES/CONSEQUENCES
DOOR
The door is open for more than the allowed time during
a cycle.
MAINTENAINCE
It's just a reminder to perform a regular service
inspection and preventive maintenance. Call your
A.S.A. for more information.
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.
HIGH PRESSURE
Head pressure is too high, exceeding 29 barg
(425psig). Check for clogged condenser, condenser fan
motor not running or pump down valve not opening
when compressor is running.
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).
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.
ELECTRICAL FEEDING
It means that the voltage supply is not within the safety
range. The range is determined by parameter MRV
Main Reference Voltage, plus or minus 20%. Check the
voltage actual reading from the Energy section during a
cycle (for more details see paragraph 2.4. Cycle Graph
and other functions). Call Service if there is suspect of
low or high voltage.
LOW TEMPERATURE
It occurs when during the holding cycle the air
temperature goes below the lower temperature limit,
parameter ALL. This parameter is a differential respect
to the setpoint.
HIGH TEMPERATURE
It occurs when during the holding cycle the air
temperature goes above the higher temperature limit,
parameter ALH. This parameter is a differential respect
to the setpoint.
AIR PROBE (S1)
Air probe failure. Call Service.
Summary of Contents for GBC-15
Page 1: ...Service Manual Blast Chiller...
Page 2: ...Rev 07 04 2015 2...
Page 3: ...Blast chiller Service Manual 3 Rev 07 04 2015...
Page 32: ...Rev 07 04 2015 32...
Page 40: ...Rev 07 04 2015 40...
Page 50: ...Rev 07 04 2015 10 20 10 0 10 20 30 40 kOhms C kOhmsVsTempChart NTC 10kOhms 25 C ZOOM...
Page 57: ...Blast chiller Service Manual 17 Rev 07 04 2015 L1 L2...
Page 91: ...Blast chiller Service Manual 51 Rev 07 04 2015 6 SCHEMATICS 6 1 SCHEME OF COMPONENTS...
Page 97: ...Blast chiller Service Manual 57 Rev 07 04 2015...
Page 100: ...Rev 07 04 2015 60...
