Operation Mode Is Not Changed Properly; Control Panel Display Is Not Operating; Power Lamp Is Not Lit; Parameter Write Cannot Be Performed - Mitsubishi Electric FR-E540-0.4K-EC Instruction Manual

5.2 Troubleshooting

5.2.8 Operation mode is not changed properly

If the operation mode does not change correctly, check the following:
1. External input signal
2. Parameter setting

5.2.9 Control panel display is not operating

Make sure that the control panel is connected securely with the inverter.

5.2.10 POWER lamp is not lit

Make sure that the wiring and installation are correct.
Check for a short circuit across terminals PC-SD.

5.2.11 Parameter write cannot be performed

Make sure that operation is not being performed (signal STF or STR is not ON).
Make sure that you pressed the
Make sure that you are not attempting to set the parameter outside the setting
range.
Make sure that you are not attempting to set the parameter in the external
operation mode.
Check Pr. 77 "parameter write inhibit selection".
.............. Check that the STF or STR signal is off.
When it is on, the operation mode cannot be
changed.
.................. Check the Pr. 79 setting.
When the setting of Pr. 79 "operation mode
selection" is "0", switching input power on
places the inverter in the external operation
mode. By pressing the
pressing the
mode changes to the PU operation mode.
For any other setting (1 to 8), the operation
mode is limited according to the setting.
(For details of Pr. 79, refer to page 106.)
key (
SET WRITE
168
PROTECTIVE FUNCTIONS
key twice and
MODE
key, the external operation
key) for longer than 1.5 seconds.
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