Daikin MICROTECH 4 User Manual

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Operation Manual
D–EOMWC00A07-16_02EN
10.8.9 No Pressure Change After Start
This alarm indicates that the compressor is not able to start or to create a certain minimum variation of the evaporating
or condensing pressures after start.
Symptom
Cause
Solution
Circuit status is Off.
The circuit is stopped.
Bell icon is moving on controller’s
display.
String in the alarm list:
Cx OffNoPressChgStart
String in the alarm log:
Cx OffNoPressChgStart
String in the alarm snapshot
Cx OffNoPressChgStart
Compressor cannot start.
Check if the start signal is properly
connected to the inverter.
Compressor is turning in wrong
direction.
Check correct phases sequence to
the compressor (L1, L2, L3)
according to the electrical scheme.
Inverter is not properly programmed
with the right direction of rotation.
Refrigerant circuit is empty of
refrigerant.
Check circuit pressure and presence
of refrigerant.
Not proper operation of evaporating
or condensing pressure transducers.
Check proper operation of
evaporating or condensing pressure
transducers.
Reset
Notes
Local HMI
Network
Auto



10.8.10 No Pressure At Startup
This alarm is used to indicate a condition where the pressure at the evaporator or at the condenser is lower than 35kPa,
so the circuit is potentially empty of refrigerant.
Symptom
Cause
Solution
Circuit status is Off.
The compressor does not start
Bell icon is moving on controller’s
display. String in the alarm list:
Cx OffNoPressAtStart
String in the alarm log:
Cx OffNoPressAtStart
String in the alarm snapshot
Cx OffNoPressAtStart
Evaporator or condenser pressure
are below 35kPa
Check transducers calibration with an
appropriate gauge.
Check transducers cabling and
readout.
Check refrigerant charge and set it to
the proper value.
Reset
Notes
Local HMI
Network
Auto




Daikin MICROTECH 4 Specifications

General

Brand	Daikin
Model	MICROTECH 4
Category	Controller
Language	English