Appendix D Error causes and remedies
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Appendix D Error causes and remedies
Table D.1
Error
Potential cause
Remedy
Err.5
displayed in Control
mode, sensor con-
nected
Sensor failure
Replace the sensor
Open circuit or short circuit
between the sensor and the
device
Remove the cause
Wrong sensor type
Select the correct sensor type
Incorrect 2-wire connection
Install the jumper between termi-
nals 9-10
Incorrect sensor connection
Check the sensor connection dia-
gram given in Fig. 5.1
4-20 mA signal connected
without shunt resistor
Connect a shunt resistor (see 5.1.1)
Er.64
Memory error
Contact the Technical Support of
akYtec GmbH
Er.Ad
ADC conversion error
displayed in Control
mode
The input value exceeds
999.9 and cannot be dis-
played on the 4 digit display
with the accuracy 0.1°C
Set
dPt =
0
CCCC
displayed in Control
mode
The input value is less than
-199.9 and cannot be dis-
played on the 4 digit display
with the accuracy 0.1°C
Set
dPt =
0
Displayed tempera-
ture differs from the
current temperature
(Control mode)
Wrong sensor type
Select the correct sensor type
Incorrect Offset or Slope
settings
Set the correct values in parame-
ters
SH
or
KU.
If no correction is
required, set
SH
= 0 and
KU
= 1.
2-wire connection without
correction
See 6.7 “Correction”
Electromagnetic interfer-
ence
Use only shielded sensor line,
ground the shield on one point
Zeros are displayed
for the current pro-
cess value
Incorrect sensor connection See 5 “Wiring”
The temperature de-
creases when heating
and increases when
cooling
Incorrect TC connection
Change TC polarity (see Fig. 5.1)
Output relay does
not switch
Incorrect Alarm settings (see
6.14.1 “Range Alarm”)
Adjust the parameters
AL-d
and
AL-H
Control stopped
Set
r-S
= rUn
Unable to reach the
setpoint
Deadband
db
is too large
Adjust the parameter
db
(0…1°C
recommended)
Incorrect
P
,
I
,
D
coefficients
Use Autotuning (see 7.3) or Manual
Tuning (see 7.4)
Settings cannot be
modified
Access protection is set
Adjust the Access protection (see
6.17)
Control stopped, LBA
indicator lights
LBA Time (
LbA
) is too short
Increase the LBA Time or set
LbA
= 0
(see 6.14.2)
*
If the error or potential cause is not specified in the table above, contact the Technical
Support of akYtec GmbH
