Handleiding
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Local HMI
Network
Auto
5.3.13 PVM alarm
This alarm is generated in case of problems with the power supply to the chiller.
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
Unit status is Off.
All circuits are stopped immediately.
Bell icon is moving on controller’s
display.
String in the alarm list:
UnitOffPhaveVoltage
String in the alarm log:
± UnitOffPhaveVoltage
String in the alarm snapshot
UnitOffPhaveVoltage
Loss of one phase.
Check voltage level on each of the
phases.
Not correct sequence connection of
L1, L2,L3.
Check sequence of L1, L2, L3
connections according to indication
on chiller’s electrical scheme.
Voltage level on the unit’s panel is not
in the allowed range (±10%).
Check that voltage level on each
phase is into the allowed range that is
indicated on the chiller label.
Is important to check the voltage level
on each phase not only with chiller not
running, but mainly with chiller
running from minimum capacity up to
full load capacity. That's because
voltage drop can occur from a certain
unit cooling capacity level, or because
of certain working condition (i.e. high
values of OAT).
In these cases the issue can be
related with the sizing of power
cables.
There is a short-circuit on the unit.
Check for correct electrical isolation
condition of each unit’s circuit with a
Megger tester.
Reset
Notes
Local HMI
Network
Auto
5.3.14 Glycol Water Freeze alarm
This alarm is generated to indicate that the glycol water temperature (entering or leaving) has dropped below a safety limit.
Control tries to protect the intermediate heat exchanger starting the glycol pump and letting the glycol water circulate.
Symptom
Cause
Solution
Unit status is Off.
All circuits are stopped immediately.
Bell icon is moving on controller’s
display.
String in the alarm list:
UnitOff GlycolFreeze
String in the alarm log:
± UnitOff GlycolFreeze
String in the alarm snapshot
UnitOff GlycolFreeze
Glycol Water flow too low.
Increase the water flow.
Check the glycol pump
Inlet temperature to the evaporator is
too low.
Increase the inlet water temperature.
Sensor’s readings (entering or
leaving) are not properly calibrated.
Check the glycol water temperatures
with a proper instrument and adjust
the offsets
Wrong freeze limit setpoint.
The glycol freeze limit has not been
changed as a function of glycol
percentage.
Reset
Notes
Local HMI
Network
Auto
It’s required to check if the
intermediate heat exchanger has any
damage due to this alarm.
5.4 Circuit Alerts
5.4.1 Economizer Pressure Sensor fault
This alarm is generated to indicate that the sensor is not reading properly.
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 |
