Operating Instructions

Troubleshooting
Siemens Building Technologies, Inc. 97
Error Cause Diagnosis/Remedy
Drive
Reaction
F0452, Belt
failure
detected
Load condition changes at
the motor indicate a belt
failure or mechanical fault.
• Motor belt OK? Is the motor
obstructed or seized?
• If external speed sensor is used,
check proper function. Also
check:
— P0409 (pulses/sec at rated
frequency)
— P2191 (belt failure speed
tolerance monitoring)
— P2192 (delay time for
P2191).
• For belt failure detection without
sensor, check:
— P2182 (threshold frequency
f1)
— P2183 (threshold frequency
f2)
— P2184 (threshold frequency
f3)
— P2185 (upper torque
threshold 1)
— P2186 (lower torque
threshold 1)
— P2187 (upper torque
threshold 2)
— P2188 (lower torque
threshold 2)
— P2189 (upper torque
threshold 3)
— P2190 (lower torque
threshold 3)
— P2192 (delay for belt failure).
• Lubricate the motor if necessary.
Off2