IKA RET control-visc User Manual

Page 33

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33

Error messages and troubleshooting table

Fault

Description

Causes

Effect

Solutions

Er 2

In remote operation (PC) mode

with activated watchdog func-

tion in mode 1: no commu-

nication between PC and RET

control

• PC does not transmit any data

within the set watchdog time

• Connection to PC interrupted

Heating switched off

Motor switched off

• Change watchdog time

• Transmit data from PC within set

watchdog time (OUT_WDx@m)

• Check cable and plug

Er 3

Device internal temperature

exceeds 80°C

• Heat accumulation between

heating plate and housing

• Permitted ambient temperature

exceeded

Heating switched off

• Switch device off, leave to cool

and switch on again

• Change experiment

• Observe maximum permissible

ambient temperature

Er 4

Difference between target and

actual speed exceeds 300 rpm

• Motor blocked or overloaded

Heating switched off

Motor switched off

• Reduce load torque or use smaller

magnetic rods

• Reduce target speed

Er 5

No temperature increase in

sensor at continuous tempera-

ture difference (after approx.

3 mins)

• 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

resistance is too large

Heating switched off

• 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

Er 6

Interruption in safety circuit

• Defective connection cable

Heating switched off

• Replace cable

Er 13

SAFE TEMP P adjustable safety

circuit defective

• Target/current different of the

adjustable safety circuit for mini-

mum temperature monitoring

Heating switched off

• 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

Er 14

Short circuit in temperature

sensor 1

• Short circuit in temperature sen-

sor plug

• Short circuit in the cable or tem-

perature sensor

Heating switched off

• Check the plug

• Replace the temperature sensor

Er 21

Fault during heating plate sa-

fety test

• Safety relay does not open

Heating switched off

• Switch device off, leave to cool

and switch on again

Er 22

Fault during heating plate sa-

fety test

• S_CHECK cannot generate

H_S_TEMP

Heating switched off

• Switch device off, leave to cool

and switch on again

Er 24

The temperature of the heating

plate exceeds SAFE TEMP H

(Hotplate)

• SAFE TEMP H (Probe) has been

set to lower than the current

temperature of the heating plate

• Disconnection of heating plate

control temperature sensor

Heating switched off

• Leave the heating plate to cool

• Set the SAFE TEMP H (Hotplate)

higher

Er 25

Heating switching element

monitoring

• Heater control circuit switch

(TRIAC) short-circuited

• Safety relay has interrupted the

heating circuit

• Heater or the supply line is dis-

connected

• Interruption in heating plate

safety temperature sensor

Heating switched off

• Switch device off, leave to cool

and switch on again

Er 26

Difference between internal

heating plate control and safe-

ty temperature sensor too large

• Irregular temperature distribu-

tion across heating plate due to

sporadic heat dissipation

• Defective control or safety tem-

perature sensor

Heating switched off

• Switch device off, leave to cool

and switch on again

• Ensure regular heat dissipation

when using metal blocks, etc.

on the flat surface of the heating

plate

Er 31

Defective monitoring of the

heating control circuit (TRIAC)

Heating switched off

• Contact customer service

Er 41

Bar breakaway

• The bar has broken away four

times in a row without an explicit

change in the target value

Target speed reduced

by at least 300 rpm

Heating switched off

• Select a lower target speed

• Select a smaller stirring bar

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