Daikin EWWS490VZXSA1 handleiding
Handleiding
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• Overcurrent/Overload Protections
Overcurrent/overload devices protect electrical motors used on compressors, fans and pumps in case of overload or short
circuit. In case of inverter-driven motors, overload and overcurrent protection is integrated in the electronic drives. A further
protection from short circuit is accomplished by fuses or circuit breakers installed upstream each load or group of loads.
• Overtemperature Protections
Compressor and fan electrical motors are also protected from overheating by thermistors immersed into motor windings.
Should the winding temperature exceed a fixed threshold, the thermistors will trip and cause the motor to stop. High
Temperature Alarm is recorded in the Unit Controller only in case of compressors. Alarm must be reset from the controller.
Do not operate on a faulty fan before the main switch has been shut off. Overtemperature protection is auto-
reset, therefore a fan may restart automatically if temperature conditions allow it.
• Phase reversal, under/over voltage, ground fault protections
When one of those alarms occurs the unit is immediately stopped or even inhibited to start. The alarms clear automatically
once the problem is fixed. This auto clear logic allows the unit to automatically recover in case of temporary conditions
where the supply voltage reaches the upper or lower limit set on the protection device. In the other two cases a manual
intervention on the unit will be required in order to solve the problem. In case of a phase reversal alarm two phases requires
to be inverted.
In the event of a power supply outage, the unit will restart automatically without the need for an external command.
However, any faults active when the supply is interrupted are saved and may in certain cases prevent a circuit or unit from
restarting.
Direct intervention on the power supply can cause electrocution, burns or even death. This action must be
performed only by trained persons.
• Flowswitch
The unit must be protected by a flowswitch. The flowswitch will stop the unit when the water flow becomes lower than the
minimum allowed flow. When the water flow is restored the flow protection resets automatically. Exception is when the
flowswitch opens with at least one compressor running, in this case the alarm shall be cleared manually.
• Freezing protection
Antifreeze protection prevents the water to freeze in the evaporator. It is automatically activated when the water
temperature (entering or leaving) at the evaporator drops below the antifreeze limit. In freeze condition if the unit is in
standby the evaporator pump will be activated to prevent freezing of the evaporator. If the freeze condition will activate
when the unit is running all the unit will shut down in alarm while the pump will keep running. Alarm will automatically clear
when the freeze condition will clear.
• Low pressure protection
If the circuit operates with a suction pressure lower than an adjustable limit for a certain time the circuit safety logic will
shut down the circuit and generate an alarm. The alarm requires a manual action on the Unit Controller to be reset. Reset
will take effect only if the suction pressure is no longer lower that the safety limit.
• High Pressure Protection
If the discharge pressure becomes too high and exceeds a limit which is linked with the operational envelop of the
compressor the circuit safety logic will try to prevent the alarm or, if the corrective actions have no effect, it will shut down
the circuit before the Mechanical High Pressure switch will open. This alarm required a manual action on the Unit Controller
to be reset.
• Mechanical High Pressure Switch
Each circuit is equipped with at least one high pressure switch which tries to prevent the relief safety valve to open. When
the discharge pressure becomes too high the Mechanical High Pressure switch will open and immediately stop the
compressor cutting the power supply to the auxiliary relay. The alarm can be cleared as soon as the discharge pressure
becomes normal again. The alarm must be reset on the switch itself and on the Unit Controller. The triggering pressure
value cannot be changed.
• Relief Safety Valve
If the pressure becomes too high in the refrigerant circuit, the relief valve will open to limit the maximum pressure. If this
happens switch off immediately the machine and contact your local service organization.
• Inverter fault
Each compressor can be equipped with its own inverter (integrated or external). The inverter can automatically monitor its
status and inform the Unit Controller in case of faults or pre-alarm conditions. If this happen the Unit Controller will limit the
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Productinformatie
| Merk | Daikin |
| Model | EWWS490VZXSA1 |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 9055 MB |
