6.5 When Codes Other Than Alarm Codes and Light Alarm Indication (
l-al
) are Displayed
6-32
6.5.2 Problems with inverter settings
[ 1 ] Nothing appears on the LED monitor
Possible Causes Check and Measures
(1) No power (neither main power
nor auxiliary control power) is
supplied to the inverter.
Check the input voltage and interphase voltage unbalance.
Switch on the molded-case circuit breaker, the earth-leakage circuit
breaker (with overcurrent protective function) or the magnetic
contactor.
Check for voltage drop, phase loss, poor connections, or poor
contacts and fix them if necessary.
(2) The power for the control PCB
did not reach a sufficiently high
level.
Check if the shorting bar has been removed between terminals P1 and
P(+) or if there is a poor contact between the shorting bar and those
terminals.
Mount a shorting bar or a DC reactor between terminals P1 and
P(+). In case of poor contact, tighten the screws.
(3) The keypad was not properly
connected to the inverter.
Check whether the keypad is properly connected to the inverter.
Remove the keypad, put it back, and see whether the problem
recurs.
Replace the keypad with another one and check whether the
problem recurs.
When running the inverter remotely, ensure that the extension cable is
securely connected both to the keypad and to the inverter.
Disconnect the cable, reconnect it, and see whether the problem
recurs.
Replace the keypad with another one and check whether the
problem recurs.
[ 2 ] The desired menu is not displayed
Possible Causes Check and Measures
(1) The menu display mode is not
selected appropriately.
Check the data of function code E52 (Keypad (Menu display mode)).
Change the E52 data so that the desired menu appears.
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