YASKAWA VS-626M5 Specifications download pdf (Page 150)

The VS-626M5 PC NC Maintenance Manual

4-129

1. Turning ON the Control Power Supply

When the control power supply is turned ON, “ ” is displayed in the

converter 7-segment LED display section and “ ” is displayed in the

inverter 7-segment LED display section. If they do not appear, search for

the cause, referring to the list of fault displays.

2. Turning ON the Main Circuit Power Supply

When the main circuit power supply is turned ON, the converter 7-segment

LED display is changed to “ .” At the same time, the inverter and the

converter CHARGE LEDs are lit in red. If any fault is displayed, search

for the cause, referring to the list of fault displays.

When “ ” is displayed continuously on the 7-segment LED of the con-

verter, the main circuit input voltage may be low or an open-phase may be

occurring. Check the input supply voltage.

3. Checking the Motor Cooling Fan

When the main circuit power supply is turned ON, the motor cooling fan

begins to rotate. Verify that the cooling air for the motor flows in the cor-

rect direction. According to the standard specifications, the cooling air

enters from the drive end and leaves from opposite the drive end.

Figure 4.19: Motor Cooling Air Passage

(a)@Flange-mounted Type

(b)@Foot-mounted Type

Flange mounted type Foot mounted type

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YASKAWA VS-626M5 Specifications Page 150