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Air cooled inverter water chiller
OPERATION
MANUAL
EWAD TZ B 160-700
Air cooled inverter water chiller
D-EOMAC00909-16EN
Operation Manual
63
Symptom
Cause
Solution
Unit status is Off.
All circuits are stopped with a normal
shutdown precedure.
Bell icon is moving on controller’s
display.
String in the alarm list:
UnitOffAmbTempSen
String in the alarm log:
UnitOffAmbTempSen
String in the alarm snapshot
UnitOffAmbTempSen
Sensor is broken.
Check for sensor integrity.
Check correct sensors operation
according table and allowed kOhm
(k) range.
Sensor is shorted.
Check if sensor is shorted with a
resistance measurement.
Sensor is not properly connected
(open).
Check for absence of water or
humidity on electrical contacts.
Check for correct plug-in of the
electrical connectors.
Check for correct sensors wiring also
according electrical scheme.
6.1.3.3 Evaporator Water Temperatures inverted
This alarm is generated any time the entering water temperature is lower than the leaving by 1°C
and at least one compressor is running.
Symptom
Cause
Solution
Unit status is Off.
All circuits are stopped with a normal
shutdown precedure.
Bell icon is moving on controller’s
display.
String in the alarm list:
UnitOffEvpWTempInvrtd
String in the alarm log:
UnitOffEvpWTempInvrtd
String in the alarm snapshot
UnitOffEvpWTempInvrtd
Entering and leaving water
temperature sensors are inverted.
Check cabling of the sensors on the
unit controller.
Check offset of the two sensors with
the water pump running
Entering and leaving water pipes are
reversed
Check if the water flows in counter
flow respect to refrigerant.
Water pump operate reverse.
Check if the water flows in counter
flow respect to refrigerant.
6.1.4 Unit Rapid Stop Alarms
6.1.4.1 Power Fault (only with the UPS option)
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
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Productinformatie
| Merk | Daikin |
| Model | EWAD620TZPLB |
| Categorie | Airco |
| Taal | Nederlands |
| Grootte | 11976 MB |
