Cleveland Range inverter manual Troubleshooting & Maintenance, Condition, Check Point

Chapter 6 - Troubleshooting & Maintenance

6.4 Troubleshooting

Condition		Check Point
	1)	Main circuit inspection
		☞ Input (line) voltage normal? (LED charge lamp on?)
		☞ Motor connected correctly?
	2)	Input signal inspection
		☞ Input signal to inverter functioning?
		☞ Forward and reverse signals inputted simultaneously to inverter?
The motor does		☞ Inverter receiving command input frequency signal?
	3)	Parameter setting inspection
not rotate
		☞ Reverse prevention (FU1-03) function set?
		☞ Operation mode (FU1-01) set correctly?
		☞ Command frequency set to 0?
	4) Load inspection
		☞ Load too large, or motor restrained. (Mechanical Brake)
	5) Other
		☞ Alarm displayed on keypad, or alarm LED lit? (STOP LED blinking?)
The motor rotates	☞ Phase sequence of output terminal U, V and W correct?
in opposite	☞ Starting signal (Forward/Reverse) connected correctly?
directions
The difference	☞ Reference frequency verified? (Check the level of input signal)
between the	☞ Following parameter setting verified?
rotating speed and		Lower Limit Frequency (FU1-24), Upper Limit Frequency (FU1-25), Analog Frequency Gain (I/O-
the reference is		1~10)
too big	☞ External noise? (Use a shielded wire)
The inverter does	☞ Acceleration/Deceleration time too short.
not accelerate or	☞ Load too large?
decelerate	☞ Torque Boost (FU1-27, 28) value too high? (Current limit function and the stall prevention
smoothly		function verified?)
The motor current	☞ Load too large?
is too high	☞ Torque Boost Value (manual) too high?
The rotating	☞ Upper Limit Frequency (FU1-25) value correct?
speed does not	☞ Load too large?
increase	☞ Torque Boost (FU1-27, 28) value too high? Is Stall prevention function (FU1-59, 60) verified?
	1)	Load inspection
The rotating		☞ Load oscillating?
speed oscillates	2)	Input signal inspection
when the inverter		☞ Reference frequency signal oscillating?
is operating.	3)	Other
		☞ Wiring too long? (Over 500m, 1,500ft)

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