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 exceeds
SAFE TEMP H (Hotplate)

Troubleshooting

Causes
• PC does not transmit any data
within the set watchdog time
• Connection to PC interrupted
in
• Heat accumulation between
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 generate
H_S_TEMP
• SAFE TEMP H (Probe) has been
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 Solutions
Heating switched off • Change watchdog time
Motor switched off • Transmit data from PC within set
• Check cable and plug
Heating switched off • Switch device off, leave to cool and
• Change experiment
• Observe maximum permissible am-
Heating switched off • Reduce load torque or use smaller
Motor switched off
• Reduce target speed
Heating switched off • Place the sensor in the medium
• Reduce the volume of the media
• Use a carrier fluid with better heat
• Replace the glass vessel with a
• Increase the "Time-out" period
Heating switched off • Replace cable
Heating switched off • After switching on, change the
Heating switched off • Check the plug
• Replace the temperature sensor
Heating switched off • Switch device off, leave to cool and
Heating switched off • Switch device off, leave to cool and
Heating switched off • Leave the heating plate to cool
• Set the SAFE TEMP H (Hotplate)
watchdog time (OUT_WDx@m)
switch on again
bient temperature
magnetic rods
conductivity properties
metal pot
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
switch on again
switch on again
higher
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