Troubleshooting; Alarms - Daikin ZANOTTI AS Serie Manual De Uso Y Manutención

12.3 Troubleshooting

During operation following troubles may occur:
1. Compressor stops. The unit is equipped with an overtemperature device which stops the
compressor every time the max. allowable temperature of motor windings is exceeded. Possible
causes are:
ATTEN TI ON
Do not use either hot w ater or any pointed, cutting, m etal objects to rem ove ice blocks.
3. Display does not light up. Check:
4. Unit does not start operating when pressing ON/OFF key (the display is turned on): check
microdoor connection keeping in mind that the switch contact must be closed when the door
is closed.
Unsatisfactory efficiency of the unit:
W AR NI NG:
R em oval of protections during m achine operation is absolutely forbidden. They have been
developed to safeguard the operator's safety.
12.4 Alarm s
When an alarm condition occurs the following warning devices are activated (depending on the
nature of the alarm):
The buzzer and the alarm relay can be muted by pressing any key. When a key is pressed, the
led flashes as long as the alarm condition is present. To have the alarm code displayed, press
ENTER key: AL appears. Press ENTER key. At this point a code is displayed indicating the cause
of the alarm.
To leave the alarm menu wait 15 seconds or press SET as long as cold room temperature is displayed.
- insufficient ventilation of the room where the unit is installed;
- anomaly in mains voltage;
- faulty operation of condenser fan.
Device reset is automatic.
2. Ice forms on the evaporator preventing air from flowing regularly.
Possible causes are:
- the door is opened too frequently;
- faulty operation of evaporator fan;
- faulty solenoid valve (in models with hot gas defrost);
- faulty defrost heater (in models with electric defrost);
- faulty defrost process. In this case some measures can be taken:
increase defrost termination temperature by some degrees, increase number of
defrosts.
- if there is power to the unit;
- if mains cable is connected properly;
- fuses inside the electric panel
If no defects are found in the unit check that: cold room doors are perfectly tight; there is
no cold dispersion; the cold room is used wisely; no unfrozen liquids or foodstuffs are
placed in the low temperature room; the evaporator is ice-free.
We recommend installation of the machines far from the doors especially when the cold
room is expected to be opened many times a day.
alarm led
buzzer
alarm relay.
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