Chapter 5 Troubleshooting and maintenance
5-4
5.1.2. Special conditions
Display Fault Description
Zero speed at stop
Occurs when preset frequency <0.1Hz
Fail to start directly
On power up.
1. If the inverter is set for external terminal control mode
(00-03/00-04=1) and direct start is disabled (04-09=1)
The inverter cannot be started and will flash STP1.
The run input is active at power-up, refer to descriptions of (04-09).
2. Direct start is possible when 04-09=0.
Keypad Stop
Operated
when inverter
in external
Control mode.
1. With the function of Stop key enabled by (04-02=0)
And if the Stop key is pressed while the inverter is set to external
control mode (00-03/00-04=1) then, the inverter will stop according
to the setting of 04-01 and the error message, ‘STP2’flashes after
stop.
Release and re-activate the run contact to restart the inverter.
2. If the inverter is in communication mode and the Stop key is enabled
(04-02=0), the inverter will stop in the way set by 04-01 when Stop
key is pressed during operation and then flashes STP2. The Host
controller has to send a Stop command then a Run command to the
inverter for it to be restarted.
3. Stop key will be disabled when 04-02=1
External
Rapid stop
The inverter will decelerate to stop and then flash E.S., when input
external Rapid stop signal via the multifunctional input terminal
activates (refer to descriptions of 01-00~01-05).
External base
block
The inverter stops immediately and then flashes b.b., when external
base block is input by the multifunctional input terminals.
(Refer to descriptions of 01-00~01-05).
Auto-tuning faults
1. Motor data error resulting in auto-tuning failure
2. Stopping the inverter during Auto-tuning before completion
PID feedback loss PID feedback loss detect
Communication
error
Communication error detect (refer group 8 )
STP2
b.b.
STP1
STP0
ATER
PDER
E.S.
COT
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