49
Troubleshooting and Test Functions
Temperature Sensor Failed (1 - 4)
Temperature Sensor Failed (1 - 4)
The ALS thermostat is equipped with four sensors to monitor the
performance of the instrument. The sensors are connected to both sides of
the Peltier elements for control of the cooling / heating efficiency. As the
positioning of the sensor is critical to meet the performance requirements of
the ALS thermostat the single sensors cannot be replaced separately.
Probable Causes: • Temperature sensor is defective
Suggested Action: ❏ See ““Exchanging the Sensors” on page 67”.
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