- 22 -
8-4. Error Codes, Causes and Remedies
Error codes
Problem
Remedy
Cause
Position higher limit error:
Position value exceeds higher
limit (as set for position error
range).
Initial value: 103%
(Po-HH)
Problem in wiring connection of
feedback potentiometer.
Control motor trouble.
Check and confirm wiring connection to
feedback potentiometer (terminals 4, 5
and 6).
Check, repair or replace control motor.
Position lower limit error:
Position value falls below
lower limit (as set for position
error range).
Initial value: -3%
(Po-LL)
Problem in wiring connection of
feedback potentiometer.
Control motor trouble.
Check and confirm wiring connection to
feedback potentiometer (terminals 4, 5
and 6).
Check, repair or replace control motor.
Control loop error:
Feedback potentiometer input
signal does not change
correspondingly to control
output.
(LP-Er)
Problem with wiring connection to
feedback potentiometer.
Deterioration of control motor.
Mismatch between motor speed and
control loop error detection time.
Check and confirm wiring connection to
feedback potentiometer (terminals 4, 5
and 6), (terminals 15, 16 and 17).
Check, repair or replace control motor.
Check and change set time for the
detection of control loop error (to a
somewhat larger value).
Input higher limit error:
Control input signal exceeds
higher limit (110%).
(in-HH)
Mismatch between input range and
control input signal.
Problem with input circuit of EM70.
Check and confirm input range and
control input signal.
Check, repair or replace EM70.
Input lower limit error:
Control input signal falls
below lower limit (-10%).
(in-LL)
(ZS-Er)
Problem with wiring connection for
control input signal.
Mismatch between input range and
control input signal.
Problem with input circuit of EM70.
Check and confirm wiring connection for
control input signal (terminals 2 and 3).
Check and confirm input range and
control input signal.
Check, repair or replace EM70.
Zero/span adjustment error:
Error occurred on zero/span
adjustment screen.
Problem with wiring connection to
control motor.
Span side and zero side adjusted
inversely.
Check wiring connection to potentiometer
of control motor, particularly for burnout.
(Terminal 4, 5 and 6), (Terminals 15, 16
and 17)
Check wiring connection for control
signal of control motor, particularly for
burnout.
Note:
If the product is found to be out of order, we ask you to re-read the instruction manual and examine the product again before
calling us for our assistance.
When you notice something is wrong with the product or need further information, please contact our nearest agent or sales
office.
