Alarms - Zanotti DB1-DBO121 Manual De Uso Y Manutención

12.4 Alarms

When the unit is in alarm mode, the control LED lights up, the buzzer (available if installed by the customer)
starts operating and the display shows an alarm code allowing the immediate identification of the alarm.
ALARM
High temperature
Low temperature
Room sensor
Evaporator sensor
Open Door
High/Low pressure
Voltage monitor
36
DISPLAY
(HA) alternating with cold
room temperature.
(LA) alternating with cold
room temperature.
Steady (P1).
(P2) alternating with cold
room temperature.
(dA) alternating with cold
room temperature.
(PrE) alternating with
room temperature; LED
(4) lights up each time the
high or low pressure
switch is tripped. If more
than 10 trips occur in one
hour, then (PAL)
alternating with cold room
temperature is displayed
and alarm relay is
activated together with
LED (4).
(bAL) alternating with cold
room temperature. The
voltage monitor is an
electronic device which
checks the supply voltage
of the unit when voltage
variations exceed +/-12%.
The unit stops for about 6
minutes and restarts
automatically if voltage is
within the prescribed limits.
Warning: on first starting
the monitor carries out a
counting phase of 7
minutes, during which the
unit should be left
connected but in OFF
condition.
CAUSE
Excessive door openings.
Too high temperature of
products stored.
Malfunction of the unit.
Malfunction of electronic
controller.
Sensor not connected.
Sensor not connected.
Door opening time exceeds
max opening time set by
parameter
Faulty operation of
condenser fan.
Check condenser cleaning
and gas charge.
Wrong supply voltage.
REMEDY
Service intervention.
Replace sensor.
Replace sensor.
Automatic reset when the
door is closed.
Switch off the refrigerating
unit, wait a few seconds
and switch on again.