Excessive Data Writing
in the Controller
Memory Unit Alarm
- Electronic malfunction.
- Contact the Supplier.
- Damage to controller ROM.
- Impossibility
to use the machine.
7
Low Superheating
Evaporator
Alarm 1-2-3-4
- Superheating set too low.
- Excessive compressor
engaging and disengaging.
- PID config. to optimise.
- Very low evaporation
temperatures.
- Damage to temperature
or pressure transducers.
- Loss of step by the valve.
- Significantly increase heating.
- Check for errors in the
reading of
Pressure/Temperature probes.
- Reset the valve controller.
- Contact the Supplier.
- If the alarm persists, possible
liquid return
to the condensing unit.
- Possible cycle parameter
threshold exceeded
(The air temperature may fall
below the value set by
the cycle).
9-12
Evaporation high
temperature exceeded
Alarm (MOP).
- Evaporation temperatures
too high.
- Damage to temperature or
pressure transducers.
- MOP Integral time set to 0.
- Loss of step by the valve
- Check for errors in the
reading of
Pressure/Temperature probes.
- Check the MOP value set.
- Change the value of the
MOP integral time.
- Contact the Supplier.
- High evaporation
temperature/pressure
- Excessive workload for the
compressor resulting in
overheating and possible
compressor thermal
protection triggering
13-16
69
INDUSTRY
6.3 Faults and possible solutions
Section 5
Instructions for use
Communication of faults shown on the display:
The blast chiller is equipped with a visual system that
signals the presence of an alarm. The alarms are shown
on the display.
For any other type of alarm displayed:
wait a few minutes if the problem persists
contact support and specify the alarm code displayed.
Description
No.
Fan Open Door
Alarm.
- Fan door open.
- Damage to cable, connection
or micro switch
of the fan door.
- Incorrect positioning of the
fan door micro switch.
- Cable disconnected in the
terminal board.
- Check the status of the door.
- Check connections between
the door micro switch
and the terminal device.
- Check the integrity of the fan
door micro switch.
- Immediate blocking of the fans.
- Blocking of the condensing
unit after 300 s.
- Signalling CYCLE IN
PROGRESS GENERAL ALARM.
- Signalling UNIT OR
CHAMBER GENERAL ALARM.
- If there is a external network
connection,
send an alert e-mail.
Possible cause
Possible solution
Effects
Write Error
in the Retain Memory
alarm.
- Possible damage to
the ROM of the controller.
- Contact the Supplier.
- Damage to controller ROM.
- Impossibility
to use the machine.
8
2-5
Open Door
Alarm.
- Door open.
- Damage to cable, connection
or micro switch of the door.
- Incorrect positioning of the
door micro switch.
- Cable disconnected from
the terminal board.
- Check the status of the door.
- Check connections between
the door micro switch and
the terminal device.
- Check the integrity of the
door micro switch.
- Attention message on the
cycle start screen; impossibility
to start a cycle.
- Blocking of the fans after
a preset time.
- Blocking of the condensing
unit after 300 s
- Signalling CYCLE IN PROGRESS
GENERAL ALARM.
- Signalling UNIT OR CHAMBER
GENERAL ALARM.
- If there is a external network
connection,
send an alert e-mail.
6
