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How can the two error outputs for fan and temperature monitoring be checked on the TPCC cooling housing?

Article No: KA-09475
Version: 1.0
Subject to change without notice
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Table of Contents

Depending on the date of manufacture, the TPCC includes an integrated monitoring of the maximum permissible internal temperature (+50°C) and the fan function as standard. Whether your TPCC includes this monitoring can be seen from the red and green components on the connection board.

 

The result of the monitoring is output via the digital switching output Q1 and LED1 (overtemperature error) respectively Q2 and LED2 (fan error). In error-free state, the outputs are switched and the red marked LEDs are active. Further information on the switching states and the wiring of the error outputs can be found in the TPCC manual.

 

Overtemperature or fan faults can be simulated to check the function of the error outputs that are connected to a control unit, for example.

 

Overtemperature simulation:

Disconnect connection cable at terminal 8 or 17 on connection board to interrupt overtemperature bimetal switch.

  • Result: Error output Q1 inactive (low), LED1 off

 

 

Fan error simulation:

Disconnect TPCC from the supply voltage.

Block stationary fan wheel (e.g. with a screwdriver).

Switch on TPCC supply voltage.

  • Result: Error output Q2 inactive (low), LED2 off

 

Note: The fans have an auto-start cycle of 5 seconds and therefore twitch briefly in this cycle if blocked.

 

After completing the test, remember to reconnect the wiring properly and remove the blockage from the fan!
Keywords:
error outputs, peltier, cooler, tpcc
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