6) In power-line drive mode, if the phase sequence of AC power
supply is wrong, the controller will give a wrong phase
sequence alarm. The screw compressor’s operation will be
limited until the phase sequence recovers to normal
7) If motor overload is detected by CT1 and CT2 and continues
for some time, the controller will stop and give an alarm.
8) If X6 (X6 terminal enabled) detects thermal relay operation.
The controller will stop and give an alarm
9) If the “Timed operation function” is activated and the
accumulative running time hits the “Timed operation time”, the
screw compressor will automatically stops and restrict startup
until the parameter is modified or prevented by Inovance.
10) The controller provides the digital inputs for the faults such as
air filter clog, oil filter clog, separator clog and fine separator
clog. If these fault signals are detected, the controller will give
an alarm, but will not limit the operation of screw compressor.
11) The controller records the maintenance information of air filter,
oil filter, separator and fine separator, and lubricating unit. If it
is set to reach the preset maintenance time, a maintenance
reminder is given to remind the user to arrange maintenance.
The operation of screw compressor is not limited.
Chapter 6 Troubleshooting
Phenomenon Possible Cause Checking Item Handling Method
Screw
compressor
cannot start.
Emergency stop
button is not
released.
Check whether
terminal X0 in
“Actually
measured
parameter” is
in close loop
status.
Voltage and phase Check the Adjust phase
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