Emerson SP1201 - Aux Fan Failure from Power Module; Regen Drive Failed to Synchronise to Supply; Drive Control Board over Temperature; Power Device over Temperature Based on Thermal Model

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Unidrive SP Regen Installation Guide 209
Issue Number: 2 www.controltechniques.com
HF31 Aux fan failure from power module
231 Replace auxiliary fan
HF32 Power stage - a module has not powered up in a multi-module parallel drive
232 Check AC power supply
It.AC
Output current overload timed out (I
2
t) - accumulator value can be seen in Pr 4.19
20
Ensure the load is not jammed / sticking
Check the load on the motor has not changed
Ll.SYNC Regen drive failed to synchronise to supply
39
Pr 3.03 displays the reason for the synchronisation failure:
0: Tripped during synchronisation
1: Tripped while running
2: Line frequency too low (<30.0Hz)
3: Line frequency too high (>100.0Hz)
4: Error during synchronisation of PLL to supply
O.CtL Drive control board over temperature
23
Check cubicle / drive fans are still functioning correctly
Check cubicle ventilation paths
Check cubicle door filters
Check ambient temperature
Reduce drive switching frequency
O.ht1 Power device over temperature based on thermal model
21
Reduce drive switching frequency
Reduce duty cycle
Reduce motor load
O.ht2 Heatsink over temperature
22
Check cubicle / drive fans are still functioning correctly
Check cubicle ventilation paths
Check cubicle door filters
Increase ventilation
Reduce drive switching frequency
Reduce duty cycle
Reduce motor load
Oht2.P Power module heatsink over temperature
105
Check cubicle / drive fans are still functioning correctly
Check cubicle ventilation paths
Check cubicle door filters
Increase ventilation
Reduce drive switching frequency
Reduce duty cycle
Reduce motor load
O.ht3 Drive over-temperature based on thermal model
27
Check cubicle / drive fans are still functioning correctly
Check cubicle ventilation paths
Check cubicle door filters
Increase ventilation
Reduce duty cycle
Reduce motor load
Oht4.P Power module rectifier over temperature or input snubber resistor over temperature (size 4 and above)
102
Check for supply imbalance
Check for supply disturbance such as notching from a DC drive
Check cubicle / drive fans are still functioning correctly
Check cubicle ventilation paths
Check cubicle door filters
Increase ventilation
Reduce drive switching frequency
Reduce duty cycle
Reduce motor load
Trip Diagnosis