Handleiding
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5.6.24 Undervoltage Alarm on DC rectified voltage
This alarm indicates that chiller supply voltage exceeded the minimum limit which allows proper operations of the
components.
Resolution of this fault requires a direct intervention on the power supply of this unit.
Direct intervention on the power supply can cause electrocution, burns or even death. This action
must be performed only by trained persons. In case of doubts contact your maintenance company.
Symptom
Cause
Solution
Circuit status is Off.
The circuit is stopped.
Bell icon is moving on controller’s
display.
String in the alarm list:
Cx OffUnderVoltage-DC
String in the alarm log:
± Cx OffUnderVoltage-DC
String in the alarm snapshot
Cx OffUnderVoltage-DC
Chiller main power supply had a down
peak which caused the trip.
Check if main power supply is within
the acceptable tolerance for this
chiller
Main power supply setting on the
Microtech is not suitable with the
power supply in use (A/C units).
Measure the power supply to the
chiller and select the proper value on
the Microtech HMI.
Reset
Notes
Local HMI
Network
Auto
The alarm clears automatically when
the voltage is increased to an
acceptable limit.
5.6.25 VFD Communication Failure
This alarm indicates a communication problem with the inverter of the compressor.
Symptom
Cause
Solution
Circuit status is Off.
The compressor does not load
anymore, circuit is immediately
stopped.
Bell icon is moving on controller’s
display.
String in the alarm list:
CxCmp1 OffVfdCommFail
String in the alarm log:
± CxCmp1 OffVfdCommFail
String in the alarm snapshot
CxCmp1 OffVfdCommFail
RS485 network is not properly cabled.
Check the continuity of the RS485
network with the unit off. There should
be continuity from the main controller
to the last inverter as indicated on the
wiring diagram.
Modbus communication is not running
properly.
Check inverter addresses and
addresses of all the additional devices
in the RS485 network (for example
the energy meter). All the addresses
must be different.
Modbus interface card can be faulty
Check with your service organization
to evaluate this possibility and
eventually replace the board.
Reset
Notes
Local HMI
Network
Auto
The alarm clears automatically when
the communication is re-established.
5.6.26 Fans Modbus Communication Failure
This alarm indicates a communication problem with all fans of the circuit.
Symptom
Cause
Solution
Circuit status is Off.
The fans do not start, circuit is
immediately stopped.
Bell icon is moving on controller’s
display.
String in the alarm list:
Cx FanCommFail
String in the alarm log:
± Cx FanCommFail
String in the alarm snapshot
Cx FanCommFail
RS485 network is not properly cabled.
Check the continuity of the RS485
network with the unit off. There should
be continuity from the main controller
to the last fan as indicated on the
wiring diagram.
Modbus communication is not running
properly.
Check fans addresses. All the
addresses must be different.
Fans are not powered
Check if the fans are correctly
powered.
Reset
Notes
Local HMI
Network
Auto
The alarm clears automatically when
the communication is re-established.
Bekijk gratis de handleiding van Daikin EWAH670TZXRB2, stel vragen en lees de antwoorden op veelvoorkomende problemen, of gebruik onze assistent om sneller informatie in de handleiding te vinden of uitleg te krijgen over specifieke functies.
Productinformatie
| Merk | Daikin |
| Model | EWAH670TZXRB2 |
| Categorie | Airco |
| Taal | Nederlands |
| Grootte | 11657 MB |
