Troubleshooting; Unsatisfactory Efficiency Of The Unit - Daikin LMSWHD-AV3018 Manuel D'installation

12.3 Troubleshooting

During operation following troubles may occur:
1. Compressor stops. The unit is equipped with an overheating device which stops the compressor every
time the max. allowable temperature of motor windings is exceded. Possible causes are:
- insufficient ventilation of the room where the unit is installed;
- anomaly in mains voltage;
- faulty operation of condenser fan.
Device reset is automatic.
2. Display does not light up. Check:
- if there is power to the unit;
- if mains cable is properly connected;
- fuses inside the electric panel
3. Unit does not start operating when pressing ON/OFF key (the display is
microswitch connection keeping in mind that the switch contact must be closed when the door is
closed.
12.4

Unsatisfactory efficiency of the unit:

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.
WARNING:
Removal of protections during machine operation is absolutely forbidden. They have
been developed to safeguard the operator's safety.
12.6 Alarms
The alarm message is displayed until the alarm condition recoveries.
All the alarm messages are showed alternating with the room temperature except for the "P1" which is
flashing. To reset the "EE" alarm and restart the normal functioning press any key, the "rSt" message is
displayed for about 3s.
Silencing buzzer
Once the alarm signal is detected the buzzer, if present, can be silenced by pressing any key.
Alarm recovery
Probe alarms : "P1" (and), "P3" ; they automatically stop 10s after the probe restarts normal operation.
Check connections before replacing the probe.
Temperature alarms "HA" and "LA" automatically stop as soon as the thermostat temperature returns
to normal values or when the defrost starts or when the door is open
Humidity alarms "HHA" and "LHA" automatically stop as soon as the humidity returns to normal values.
Door switch alarm "dA" stop as soon as the door is closed.
Message Cause
"P1" Temperature probe failure
"P3" Humidity probe failure
"HA" High temperature alarm
"LA" Low temperature alarm
"HHA" High humidity alarm
"HLA" Low humidity alarm
"dA" Door switch alarm
turned on): check