Mitsubishi Electric FR-A700 Instruction Manual page 19

7 Troubleshooting
7.1 List of alarm display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-2
7.2 Causes and corrective actions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-5
7.3 Reset method of protective function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-23
7.4 LED display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-24
7.5 Check and clear of the alarm history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-25
7.6 Check first when you have troubles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-27
7.6.1
7.6.2
7.6.3
7.6.4
7.6.5
7.6.6
7.6.7
7.6.8
7.6.9
7.6.10 Operation mode is not changed properly . . . . . . . . . . . . . . . . . . . . . .7-30
7.6.11 Operation panel (FR-DU07) display is not operating . . . . . . . . . . . . .7-30
7.6.12 POWER lamp is not lit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-30
7.6.13 Parameter write cannot be performed. . . . . . . . . . . . . . . . . . . . . . . . .7-30
7.7 Meters and measuring methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-31
7.7.1
7.7.2
7.7.3
7.7.4
7.7.5
7.7.6
FR-A700 EC
Motor does not rotate as commanded . . . . . . . . . . . . . . . . . . . . . . . .7-27
Motor generates abnormal noise . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-28
Motor generates heat abnormally . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-28
Motor rotates in opposite direction . . . . . . . . . . . . . . . . . . . . . . . . . . .7-28
Speed greatly differs from the setting . . . . . . . . . . . . . . . . . . . . . . . . .7-28
Acceleration/deceleration is not smooth . . . . . . . . . . . . . . . . . . . . . . .7-29
Motor current is large . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-29
Speed does not increase . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-29
Speed varies during operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-29
Measurement of powers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-32
Measurement of voltages and use of PT . . . . . . . . . . . . . . . . . . . . . .7-33
Measurement of currents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-33
Use of CT and transducer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-34
Measurement of inverter input power factor . . . . . . . . . . . . . . . . . . . .7-34
Measurement of converter output voltage
(across terminals P/+ and N/-) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-34
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