Troubleshooting - IKA RET control-visc Mode D'emploi

The device will indicate that there is a fault by displaying an error
message "Er X" (see table) on the screen.
Heating will be switched off permanently (exception: WD - see
table).
The stirring function continues to operate at the pre-set speed if
there is a fault in the heating circuit (exception: WD - see table).
In order to reset the device after a fault, it may need to be discon-
nected from the power supply for several seconds. The period the
device is switched off may also need to be longer if the tempera-
tures need to be counterbalanced (residual heat display may no
longer be active; see "Residual heat display").
Error messages and troubleshooting table
Fault Description
Er 2 In remote operation (PC)
mode with activated
watchdog function
mode 1: no communica-
tion between PC and RET
control-visc
Er 3 Device internal tempera-
ture exceeds 80 °C
Er 4 Difference between target
and actual speed exceeds
300 rpm
Er 5 No temperature increase
in sensor at continuous
temperature difference
(selected time in menu)
Er 6 Interruption in safety cir-
cuit
Er 13 SAFE TEMP P adjustable
safety circuit defective
Er 14 Short circuit in temperatu-
re sensor 1
Er 21 Fault during heating plate
safety test
Er 22 Fault during heating plate
safety test
Er 24 The temperature of the
heating plate
SAFE TEMP H (Hotplate)

Troubleshooting

Causes
• PC does not transmit any data
within the set watchdog time
• Connection to PC interrupted
in
• Heat accumulation
heating plate and housing
• Permitted ambient temperature
exceeded
• Motor blocked or overloaded
• Sensor not in medium
• Volume of medium to be mea-
sured too large
• Heat conductivity of medium to
be measured too low
• Heat conductivity of the vessel is
too low
• In the case of indirect heating,
the overall heat conductivity re-
sistance is too large
• Defective connection cable
• Target/current different of the
adjustable safety circuit for mini-
mum temperature monitoring
• Short circuit in temperature sen-
sor plug
• Short circuit in the cable or tem-
perature sensor
• Safety relay does not open
• S_CHECK cannot
H_S_TEMP
• SAFE TEMP H (Probe) has been
exceeds set to lower than the current tem-
perature of the heating plate
• Disconnection of heating plate
control temperature sensor
The safety circuit test takes place within 20 seconds of switching
on the device; after the test, the other monitoring functions are
activated.
If a fault cannot be eliminated directly, you must perform a
RESET (see "Settings" menu). If the faults still cannot be elimi-
nated, the appliance must be inspected by a technical service
technician.
Effect
Heating switched off
Motor switched off
between Heating switched off
Heating switched off
Motor switched off
Heating switched off
Heating switched off
Heating switched off
Heating switched off
Heating switched off
generate Heating switched off
Heating switched off
Solutions
• Change watchdog time
• Transmit data from PC within set
watchdog time (OUT_WDx@m)
• Check cable and plug
• Switch device off, leave to cool and
switch on again
• Change experiment
• Observe maximum permissible am-
bient temperature
• Reduce load torque or use smaller
magnetic rods
• Reduce target speed
• Place the sensor in the medium
• Reduce the volume of the media
• Use a carrier fluid with better heat
conductivity properties
• Replace the glass vessel with a
metal pot
• Increase the "Time-out" period
• Replace cable
• After switching on, change the
SAFE TEMP to a different value; if
this solves the issue, the previous
value can be reset by switching the
device off and on again
• Check the plug
• Replace the temperature sensor
• Switch device off, leave to cool and
switch on again
• Switch device off, leave to cool and
switch on again
• Leave the heating plate to cool
• Set the SAFE TEMP H (Hotplate)
higher
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