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6. TROUBLESHOOTING
6-4
Table 6-1 (Continued)
Indication
Operation
panel
(Actual
characters
)
Parameter
unit
Protective
Function Name
Detection Level
Estimated Cause (
)
and
Corrective Action (•)
(E. 0HT)
External fault
The external relay or equivalent component
connected to the terminal which had been
assigned to the OH signal operated.
Refer to: Chapter 8, 8.4 Selection of the
Control Circuit Contact Input
Terminal Functions
(E. PUE)
PU disconnection
A connection fault of the operation panel or
parameter unit occurred.
Refer to: Pr. 75 [Section 8.2]
RS-485 communication was interrupted.
The number of communication retries
exceeded the Pr. 121 setting.
Refer to: Pr. 121 [Section 8.6.2]
(E. RET)
Retry excess
The number of alarms that occurred
exceeded the retry setting.
Refer to: Pr. 67 [Section 8.6.4]
(E. OLT)
Stall stop
Refer to: Pr. 22
[Section 8.5.6]
Motor overload activated the stall prevention
function consecutively, stopping the motor.
•
Reduce the load.
•
Increase the capacities of the motor and
drive unit.
E. OLT output was selected in Pr. 156.
Refer to Pr. 156 [Section 8.5.6]
(E. LF)
Phase failure
A phase failure occurred in any of the outputs
U, V, W.
MEMO
If a phase failure occurs during motor
operation, the overcurrent protective
function may be activated.
(E. P24)
P24
The PC terminal output of the control circuit is
in a short circuit.
•
Check the wiring.
MEMO
A reset may not be made from the RES
terminal. Make a reset in another
method.
(E.CTE)
Panel power
supply
The power supply cable of the operation
panel or parameter unit is in a short circuit.
•
Check the cable wiring.
(E. OPT)
Option fault
The plug-in option fitted is other than the
specified.
Power was switched on for the R, S, T of the
drive unit with the setting of the high power
factor converter connection (Pr. 30 = 2
[Section 8.5.5]).