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120
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Operation Instruction of S900 E Series Inverter
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121
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Chapter 8 Precautions for Maintenance and Inspection
Operation
Panel
Indication
Name
Possible fault reason
Corrective action
ES
Emergency stop
1: Inverter is in
Emergency stop
condition
1: After release
Emergency stop, start
up as regular procedure
CO
Communication
error
1: Communication line
connection has problem
2: Communication
parameter is incorrectly
set
3: Transmission format
is wrong
1: Perform wiring of
the RS-485 terminals
properly.
2: Set parameter over
again
3: Check data
transmission format
20
4-20mA wire
broken
1: Terminal is loose;
signal input line is bad
connected
1: Perform wiring of
the 4-20mA terminals
properly.
Pr
Parameter write
error
Parameter setting is
wrong
After stopping operation,
make parameter setting.
Err
Wrong
parameter group
The parameter does
not exist or the factory
setting parameter
Quit this parameter
8-3 Check first when you have troubles
If the causes is still unknown after every check, it is recommended
to initialize the parameters (initial value) then reset the required
parameter values and check again.
(1) Parameter write cannot be performed
Causes and corrective actions:
a: Check P118 parameter write selection.
b: Check P101Frequency setting/P102 Operation mode setting
selection.
c: Make sure that operation is not being performed. Please stop the
inverter and set.
(2) Motor does not rotate as commanded
Causes and corrective actions:
a: Check that the P102 Operation mode selection setting is correct.
b: Check that the starting frequency setting is not greater than the
running frequency.