OH8 Motor temperature via inputs T1 and T2 is too high

Hva betyr x058 ?

The motor temperature is too high, detected by a PTC or temperature contact connected to terminals T1 and T2. This indicates motor thermal overload due to impermissible continuous current or frequent/long acceleration processes. The fault can also occur if terminals T1 and T2 are not correctly connected to a temperature sensor. This monitoring can be switched off via C0585.

• Continuous operation of the motor drawing current significantly above its rated value (C0091) for extended periods, leading to thermal overload.
• Failure or obstruction of the motor's cooling fan, or accumulation of debris on motor cooling fins, severely impeding heat dissipation.
• High ambient temperature (Tu) around the motor (e.g., >50°C), exceeding its specified operating limits and reducing cooling effectiveness.
• PTC thermistor or temperature contact connected to terminals T1 and T2 reaching its trip temperature due to actual motor overheating.
• Incorrect wiring or fault in the temperature sensor circuit connected to T1 and T2 (e.g., short circuit, open circuit, incorrect sensor type selected in C0053).

Klikk på steg for å spore fremgangen.

1. 1

   Measure the actual motor current (e.g., with a clamp meter on one output phase) and compare to the motor's rated current (C0091) over time.

2. 2

   Visually inspect the motor's cooling fan for proper operation and clean any dust or debris from the motor cooling fins.

3. 3

   Measure the resistance of the PTC thermistor (between terminals T1 and T2) when the motor is cool and compare it to the sensor's specifications.

4. 4

   Verify parameter C0053 (Motor temperature sensor type) is correctly configured for the PTC thermistor or temperature contact connected to T1 and T2.

5. 5

   Reduce the mechanical load on the motor or adjust the process to decrease the frequency of starts/stops if they contribute to thermal overload.

6. 6

   Check ambient temperature around the motor with a thermometer to ensure it's within the motor's specified operating range.