GOSSEN METRAWATT GMBH
23
Display
Error Message Source
Response
Remedy
sensor error
high
Broken sensor or actual value
greater than upper range
limit
Eliminate
sensor error
sensor error
low
Sensor polarity reversed or
actual value less than lower
range limit
current error
Current transformer has re-
versed polarity, is unsuitable
or defective
Same as heating current monitoring alarm
Continues to control temperature
Inspect
current
transformer
no tune
Self-tuning cannot be started
(controller sort: “actuator” or
“limit transducer”)
No response to error
Error message is shown until key is pressed
–
tune error 2
Disturbance in self-tuning
sequence in steps 1 through
13 (step 2 in this case)
Control outputs I and II inactive
Self-tuning must be aborted.
1)
1)
Avoid disturbances which impair the self-tuning sequence, e.g. sensor errors.
loop error
Measured temperature rise is
too small with heat on at
100%
Control outputs I and II inactive.
Error message is not cleared until
key is pressed
and held.
2)
2)
Close the control loop: Check the sensor, the actuators and the heater for correct functioning.
Check sensor-heater assignments (wiring). Correctly optimize control parameters
tu
and
Pb 1
.
parameter
error
Parameter not within
permissible limits
Control outputs I and II inactive.
The parameter level is disabled.
3)
3)
Restore default configuration and default parameters, and then reconfigure, or load user-defined default settings.
digital error
Error detected by digital com-
ponent monitoring
Control outputs I and II inactive
Arrange for
repair at
authorized
service
center
analog error
Hardware error detected by
analog component
monitoring
Control outputs I and II inactive
Ctr. Sort
PWR Read-Out
2 or 3-step
YSE
= –100/0/100%
YSE
≠
–100/0/100%
–100/0/100%
If the controller has settled in:
last “plausible” PWR, if not:
YSE
Step
YSE
On/off ctr.
Actuator
No response to error