092008
42
Error code Description
Cause
Effect
Solution
Er 1
In operating mode A; temperature
• When the unit was switched on in
The heating remains
• Switch off the unit, plug in the tempera-
sensor not plugged in
the mode A, the temperature sensor
switched off
ture sensor, switch on the unit
was not plugged in
• Switch over the operating mode
Er 2
In remote operation (PC), with
• PC does not send any data during
Heating OFF
• Change the watchdog time.
watchdog funktion 1 enabled:
the watchdog time.
Motor OFF
• Send data from the PC within the
No communication between PC
• The connection/cable to the PC is
watchdog time (OUT_WDx@m).
and RET control-visc/C
broken.
• Check the connector cable and plug.
Er 3
Temperature inside unit is higher
• Build up of heat between the heating
Heating OFF
• Switch off the unit. Allow it to cool down
than 80°C
plate and the casing.
and then switch on again.
• Permitted ambient temperature has
• Change test process.
been exceeded.
• Restore ambient temperature to within
the permitted maximum.
Er 4
Difference between setpoint and
• Motor seized or overloaded.
Heating OFF
• Reduce the torque load, e.g. use smaller
actual speeds is greater than
Motor OFF
magnetic bars.
300 rpm.
• • Reduce the setpoint speed.
Er 5
No temperature increase measured
• Sensor not in medium.
Heating OFF
• Immerse the sensor in the medium.
by temperature sensor where
• Volume of heat transfer medium
• Reduce medium volume.
temperature difference remains the
too large.
• Use a heat transfer oil with a better heat
same (after approx. 3 minutes).
• Medium heat transfer rating is too low.
transfer rating.
• Heat temperature rating of the vessel.
• Use a metal vessel in place of a glass
is too low.
vessel.
• With indirect heating the total heat
transfer resistance is too high.
Er 8
The calibration value of the tempe-
• Fault in calibration procedure.
Heating OFF
• Repeat the calibration procedure.
rature sensor is outside the limit
• Value was incorrectly stored to memory.
value.
• EEPROM switching error.
Er 9
Fault storing the safety circuit set-
• EEPROM fault
Heating OFF
• Switch off the unit. Allow it to cool down
point temperatures.
and then switch on again.
Er 11
Temperature sensor unplugged.
• Medium temperature sensor 1 or 2
Heating OFF
• Only unplug the temperature sensor
(PT 100 or PT 1000) was unplugged
when the unit is switched off.
during an operating cycle.
15.1
Troubleshooting. Error messages, causes and solutions
3386500a_RETcv_092008:RET contr visc_04 06.10.2008 13:43 Uhr Seite 42
