Chapter 5 Description on How to Operate Screw Compressor
5.1 Precautions on Operation
Notes:
1) Be sure to check whether the power cables and signal cables are correctly
connected prior to first-time operation after wiring is complete. For the
equipment that may be driven by power-line, connect the L1, L2 and L3 wires
of the motor must correspondingly to terminals A, B and C of the controller
that are used for detecting phase sequence so as to ensure correct detecting
of phase sequence. You can test the running of the screw compressor
through jog operation of main motor and trial operation of the fan provided by
the controller.
2) When connecting or plugging/unplugging the signal cables, ensure that there
is no power supply to the compressor system or wait for 10 minutes after the
compressor system is powered off. Otherwise, electrical shock or component
damage may result.
3) When powering on the equipments for the first time, ensure to power on the
H0UB1G controller and the MD320 Series inverter simultaneously or power
on the inverter first. Otherwise, the MD320 inverter cannot work normally
because the controller cannot detect it and so cannot initialize it.
4) If you want to switch the drive mode between inverter and power-line, ensure
that the screw compressor is in stop status and the system suffers no
electrical or mechanical shock.
5.2 Operate Screw Compressor in MDI Drive Mode
When screw compressor is in stop status and the controller displays the
default screen, press the key
I
on the right side of the panel. The
screw compressor starts up immediately.
In running status, press
O
on the right side of the panel, the screw
compressor is ready to stop and stops after some delay. The control
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