Daikin MICROTECH 4 User Manual

D–EOMWC00A07-16_02EN
Operation Manual
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10.6.2 External Event
This alarm indicates that a device, whose operation is linked with this machine, is reporting a problem on the dedicated
input.
Symptom
Cause
Solution
Unit status is Run.
Bell icon is moving on controller’s
display.
String in the alarm list:
UnitExternalEvent
String in the alarm log:
UnitExternalEvent
String in the alarm snapshot
UnitExternalEvent
There is an external event that has
caused the opening, for at least 5
seconds, of the digital input on the
controller board.
Check for reasons of external event
and if it can be a potential problem
for a correct chiller operation.
Reset
Notes
Local HMI
Network
Auto



The alarm is automatically cleared
when the problem is solved.
NOTE: What above applies in case of configuration of the external fault digital input as Event
10.6.3 Evaporator Entering Water Temperature Sensor Fault
This alarm is generated any time the input resistance is out of an acceptable range.
Symptom
Cause
Solution
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:
UnitOffEvpEntWTempSen
String in the alarm log:
UnitOffEvpEntWTempSen
String in the alarm snapshot
UnitOffEvpEntWTempSen
Sensor is broken.
Check for sensor integrity. according
table and allowed kOhm (k ) range.
Check correct sensors operation.
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.
Reset
Notes
Local HMI
Network


10.6.4 Condenser Entering Water Temperature Sensor Fault
This alarm is generated any time the input resistance is out of an acceptable range.
Symptom
Cause
Solution
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:
UnitOffCndEntWTempSen
String in the alarm log:
UnitOffCndEntWTempSen
String in the alarm snapshot
UnitOffcndEntWTempSen
Sensor is broken.
Check for sensor integrity. according
table and allowed kOhm (k ) range.
Check correct sensors operation.
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.
Reset
Notes
Local HMI
Network
Auto




Daikin MICROTECH 4 Specifications

General

Brand	Daikin
Model	MICROTECH 4
Category	Controller
Language	English