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5.2.8 Operation Mode Is Not Changed Properly; 5.2.9 Operation Panel Display Is Not Operating; 5.2.10 Power Lamp Is Not Lit; 5.2.11 Parameter Write Cannot Be Performed - Mitsubishi Electric FR-E520 Instruction Manual

Transistorized inverter.
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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 .................. Check the Pr. 79 setting.

5.2.9 Operation panel display is not operating

Make sure that the operation panel is connected securely with the inverter.
Check for a short circuit across terminals PC-SD.
Check that the jumper across terminals P-P1 is fitted securely.

5.2.10 POWER lamp is not lit

(Check the power lamp after removing the operation panel.)
Make sure that the wiring and installation are correct.

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
Make sure that you are not attempting to set the parameter in the external
operation mode.
Check Pr. 77 "parameter write disable selection".
............... Check that the STF or STR signal is off.
When it is on, the operation mode cannot be
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 124.)
key (
key, the external operation
key) for longer than 1.5 s.
key twice and


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