Operation Mode Is Not Changed Properly; Operation Panel (Fr-Du07) Display Is Not Operating; Power Lamp Is Not Lit; Parameter Write Cannot Be Performed - Mitsubishi Electric FR-F740-00023-EC Instruction Manual
Frequency inverter
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Also See for FR-F740-00023-EC:
- Instruction manual (341 pages) ,
- Installation manuallines (36 pages) ,
- Instruction manual (144 pages)
Table of Contents
Check first when you have troubles
4.6.10 Operation mode is not changed properly
1) Inspection of load
Check that the STF or STR signal is off.
When it is on, the operation mode cannot be changed.
2) Parameter setting
Check the Pr. 79 setting.
When the Pr. 79 Operation mode selection setting is "0" (initial value), the inverter is placed in the
external operation mode at input power-on. At this time, pressing
switches the mode to the PU operation mode. For other values (1 to 4, 6, 7), the operation mode
is limited accordingly.
4.6.11 Operation panel (FR-DU07) display is not operating
Check that the operation panel is connected to the inverter securely.
4.6.12 POWER lamp is not lit
Check that wiring is securely performed and installation is correct.
4.6.13 Parameter write cannot be performed
Make sure that operation is not being performed (signal STF or STR is not ON).
Make sure that you are not attempting to set the parameter in the external operation mode.
Check Pr. 77 Parameter write selection.
Check Pr. 161 Frequency setting/key lock operation selection.
252
on the operation panel
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