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Local HMI
Network
Auto
NOTE: What above applies in case of configuration of the external fault digital input as Event
6.1.10 Fan Alarm Module Communication Fail (A/C units only)
This alarm is generated in case of communication problems with the FAC module.
Symptom
Bell icon is moving on controller's display.
String in the alarm list:
FanMdlCommFail
String in the alarm log:
FanMdlCommFail
String in the alarm snapshot
FanMdlCommFail
Reset
Local HMI
Network
Auto
6.1.11 Heat Recovery Entering Water Temperature sensor fault (A/C units only)
This alarm is generated any time that the input resistance is out of an acceptable range.
Symptom
Unit status is Off.
All circuits are stopped with a normal
shutdown procedure.
Bell icon is moving on controller's display.
String in the alarm list:
UnitAlHREwtSen
String in the alarm log:
UnitAlHREwtSen
String in the alarm snapshot
UnitAlHREwtSen
Reset
Local HMI
Network
Auto
6.1.12 Heat Recovery Leaving Water Temperature sensor fault (A/C units only)
This alarm is generated any time that the input resistance is out of an acceptable range.
Symptom
Heat Recovery is Off
Bell icon is moving on controller's display.
String in the alarm list:
UnitAlHRLvgSen
String in the alarm log:
UnitAlHRLvgSen
String in the alarm snapshot
UnitAlHRLvgSen
Reset
EWAD TZ - EWAD TZ B - EWWD VZ
Air and Water cooled inverter chillers
and heat pump
Air and Water cooled inverter chillers and heat pump
Cause
Module has no power supply
Module address is not properly set
Module is broken
Cause
Sensor is broken.
Sensor is shorted.
Sensor is not properly connected (open).
Cause
Sensor is broken.
Sensor is shorted.
Sensor is not properly connected (open).
The alarm is automatically cleared when
the problem is solved.
Solution
Check
the
power
supply
connector on the side of the module.
Check if LEDs are both green.
Check if the connector on the side is tightly
inserted in the module
Check if module's address is correct
referring to the wiring diagram.
Check if LED are on and both green. If
BSP LED is solid red replace the module
Check if power supply is ok but LEDs are
both off. In this case replace the module
Notes
Solution
Check for sensor integrity according table
and allowed kOhm (k) range.
Check correct sensors operation
Check if sensor is shorted with a
resistance measurement.
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.
Notes
Solution
Check
for
sensor
according table and allowed kOhm (k)
range.
Check correct sensors operation
Check if sensor is shorted with a resistance
measurement.
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.
Notes
D-EOMZC00105-17EN
Operation Manual
57/84
from
the
integrity.
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