Tool-Temp TT-181 - Failure Corrective Action

Manual of instructions TT-181 28/33
11. Failure corrective action
Symbol
Symptom
Probable cause
Correction
Green ON/OFF-switch as
well as all lamps do not
light
• Fuse defective
• Possibly transformer or
switch defective
• Replace the 5 x 20 mm 1 A
fuse
• Replace defective parts
Red lamp “thermal relay”
lights
Horn sounds
• Overload relay of the
pump motor has
responded
• Unit switches off (pump)
• Possibly 2-phase
running
• Let the motor cool down
• Open the unit and press the
blue button of the overload
relay “motor”
• Check the electrical
connection
When the motor has cooled
down the unit switches on
again.
Red lamp „temperature
monitoring“ lights and the
unit switches off
Horn sounds
• Maximum temperature
of the unit is reached –
thermostat has respond
• Try to establish the cause,
maybe too low adjustment of
the thermostat
• Check the controller
• Check the contactors
Control lamp “Temperature
deviation control” lights
Horn sounds
• Temperature deviation
between required and
actual temperature is
too big
• Check heating contactors
and heating resistor
• Check the cooling
Left yellow lamp „level
control“ lights, unit works
• Not enough heat
transfer medium in the
circuit
• Level switch defective
• Automatic filling
defective or not
connected
• Cool the unit below 60°C
• Search leakage and repair it
Right (and left) yellow
lamp „level control“ lights,
unit switches off
• Not enough heat
transfer medium in the
circuit
• Level switch defective
• Cool the unit below 60°C
• Search leakage and repair it
• Replace defective parts
The required temperature
will not be reached,
heating lamp on the
controller lights
• Solenoid valve of the
water cooling system
not closed or defective
• Maybe to big consumer
• Heating defective
• Contactor of heating
defective
• Clean the solenoid valve,
check signal to valve and
function, repair or replace it
• Contact the supplier
• Measure resistance of
heating
• Replace contactor
Lamp „cooling“ lights, unit
is not cooling
• Cooling water inlet or
outlet is closed
• Filter is dirty
• Solenoid valve
defective
• Check water supply
check counter pressure on
cooling water outlet
• Clean filter
• Check solenoid valve