Trial Operation Procedures; Inspecting And Retightening Screws And Bolts; Measuring Transformer Insulation Resistance; Turning On The Control Power - YASKAWA FSDrive-MV1S Instructions Manual

Trial Operation Procedures

The procedures for trial operation are described in this section and should be followed in the order pre-
sented.

Inspecting and Retightening Screws and Bolts

After installing and wiring the Inverter, visually check the components on and in the panels and confirm that
nothing is damaged or missing.
Also check for loose screws or bolts, and retighten if necessary.

Measuring Transformer Insulation Resistance

Disconnect the incoming primary line from the Inverter, and then measure the insulation resistance at the
transformer input terminal using a 1000 V Megger insulation resistance tester. Confirm that the measured
value is 30 M or more.
Ω
The transformer primary side has a high-resistance grounded voltage detection circuit. Make sure that this
detection circuit is disconnected before measuring transformer insulation resistance.

Turning on the Control Power

Items to be checked before turning on the control power supply:
Confirm that the control power supply is the correct voltage.
•
Confirm that the control circuit terminals and controller are correctly connected.
•
When using a PG, be certain the PG is correctly wired.
•
Items to be checked after turning on the control power supply:
Measure the voltage input from the control power supply.
•
If the input voltage is different from the value indicated on the connection diagram, switch the transformer
tap setting for control, and measure the transformer secondary side voltage.
Manually operate the cooling fan and check the following:
•
Rotation direction, vibration, air leakage, and opening/closing motion of the ventilation louver on the cool-
ing fan

Checking the Display Status

Digital Operator Display
When a fault occurs in the drive control section, the details of the fault will be displayed on the Digital Opera-
tor. Refer to Chapter 7 Troubleshooting to take corrective action. A typical display at occurrence of fault is
shown below.
Display at fault occurrence
The display will differ depending on
IUV
the type of fault.
Under Voltage
A low voltage alarm is shown at left.
Trial Operation Procedures
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