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5.3.11 Power Fault
This alarm is generated when the main power is Off and the unit controller is powered by the UPS.
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:
Power Fault
String in the alarm log:
Power Fault
String in the alarm snapshot
Power Fault
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 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
phases is into the allowed range that
is indicated on the chiller label.
Is important to check the voltage level
on each phases 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
5.3.12 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 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 phases is
into the allowed range that is indicated on the
chiller label.
Is important to check the voltage level on
each phases 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
Bekijk gratis de handleiding van Daikin EWYS5004Z, 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 | EWYS5004Z |
| Categorie | Airco |
| Taal | Nederlands |
| Grootte | 7564 MB |
