Instruction manual

176
PROTECTIVE FUNCTIONS
5.2.8 Operation mode is not changed properly
1) External input signal
If the operation mode does not change correctly, check the following:
............... 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 setting of Pr. 79 "operation mode
selection" is "0", switching input power on
places the inverter in the external operation
mode. By pressing the key twice and
pressing the key, the external operation
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 111.)
MODE
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
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 key ( key) for longer than 1.5 s.
SET WRITE
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.
(Set "2" in Pr. 77 when performing parameter setting in the external operation
mode. (Refer to page 110))
Check Pr. 77 "parameter write disable selection".
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