V 11/2014
18 Operating Instructions Temperature Control Unit 90smart/150smart
Error message Rectification
not exceed the maximum device temperature (if re-
quired, check the tool temperature)
Motor current underrun
Check the pump/pump motor (with Ohmmeter) and if
required, replace them
Phase sequence failure Correct the phase sequence (interchange 2 phases)
Phase sequence unidentified Switch off phase sequence monitoring
Phase missing Check the mains, input conductor and pump motor
Motor contactor malfunction Check motor contactor and if required, replace it
Temperature sensor Sn1 failure Replace temperature sensor Sn1
Motor current exceeded
Check the pump/pump motor (with Ohmmeter) and if
required, replace them
Power failure
Failure of the power supply or temperature control
unit not switched off properly
Safety thermostat triggered
Temperature control unit has become too hot - deter-
mine the cause and reset the thermostat (by using the
reset button)
Turn on time refill exceeded
Check the cooling water circuit and the cooling circuit
for leaks
System Errors/System Notes
Error message Rectification
Parameter data corrupt Replace the control unit
Save/Load not possible during device is on Switch the temperature control unit to OFF
Error, password not reset Enter he reset code correctly
Password reset Password has been reset
Maintenance
WARNING
Before all maintenance procedures, turn off the temperature control unit, press
the main switch and unplug the mains plug!
The temperature control unit may be pressurised - Danger of injury in the event
of escaping hot water or steam!
Check that the system pressure gauge is displaying the value 0 bar.
Before disconnecting the feed lines to the temperature control unit/consumer,
first allow the temperature control unit to cool down.
Periodic Inspections and Maintenance Proce-
dures
The RT70 control system has a service interval display to simplify
maintenance work on the temperature control unit. We recommend enter-
ing the corresponding maintenance interval (e.g., 2000 hours, see the
RT70 control system programming instructions).
Please note that the instructions below are based on a daily operating
time of 8 hours. In multi-shift operation, the inspections and maintenance
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