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464 E300 Design Guide
Issue Number: 1
Mot con open Motor contactor open fault
70
The motor contactors have been detected closed when they should be open using the motor contactor monitoring when
enabled, and the feedback is connected to the drive from the motor contactors.
Recommended actions:
• Check control wiring connections from motor contactors to drive control terminal
• Check correct signal from motor feedback during operation (Default configuration, Motor contactors open, feedback =
+24 V, Motor contactors closed feedback = 0 V)
• Disable motor contactor monitoring with Motor Contactor Monitoring Enable (B29)
This is a delayed trip, where travel will complete (Elevator Software State (J03) = 0) and then the drive will trip. If a delayed
trip has been scheduled during travel (Elevator Software State (J03) >
0) then Global Warning (L04) = On (1) indicating
that there is a delayed trip scheduled to occur when travel completes.
Mot con closd Motor contactor closed fault
71
The motor contactors have been detected open when they should be closed using the motor contactor monitoring feature
when enabled, and the feedback is connected to the drive from the motor contactors.
Recommended actions:
• Check control wiring connections from motor contactors to drive control terminal
• Check correct signal from motor feedback during operation (Default configuration, Motor contactors open, feedback =
+24 V, Motor contactors closed feedback = 0 V)
• Disable motor contactor monitoring with Motor Contactor Monitoring Enable (B29)
This is a delayed trip, where travel will complete (Elevator Software State (J03) = 0) and then the drive will trip. If a delayed
trip has been scheduled during travel (Elevator Software State (J03) >
0) then Global Warning (L04) = On (1) indicating
that there is a delayed trip scheduled to occur when travel completes.
Motor Too Hot
Output current overload timed out I
2
t)
20
Motor Too Hot trip indicates a motor thermal overload based on the Motor Rated Current (B02) and Motor Thermal Time
Constant 1 (B20). Motor Protection Accumulator (J26) displays the motor temperature as a percentage of the maximum
value. The drive will trip on Motor Too Hot when Motor Protection Accumulator (J26) reaches 100 %.
Recommended actions:
• Check correct set-up of motor details in drive
• Check the load on the motor has not changed due to a fault
• Check for any system mechanical faults, brake applied, safety gear locked in
• Check Elevator balanced correctly
• Check for correctly sized drive
• If during autotune in RFC-S mode, ensure Motor Rated Current (B02) is ≤ Heavy duty current rating
• Tune the rated speed parameter Open loop and RFC-A mode)
• Check position feedback signals for induced noise
• Ensure the Motor Rated Current (B02) is not zero
OHt Brake Braking IGBT over-temperature
101
OHt Brake trip indicates that a braking IGBT over-temperature has been detected based on the software thermal model for
the braking IGBT
Recommended actions:
• Check the braking resistor value is >
minimum resistance value for drive model
OHt Control Control stage over temperature
23
OHt Control trip indicates that a control stage over-temperature has been detected. From the sub-trip number ‘xxyzz’, the
thermistor location is identified with ‘zz’.
Recommended actions:
• Check ambient temperature
• Check enclosure cooling / drive cooling fans are functioning correctly
• Check enclosure ventilation paths and/or door filters
• Increase system ventilation
• Reduce the drive switching frequency
Trip Diagnosis
Source xx y zz Description
Control system 00 0 01 Control board thermistor 1 over temperature
Control system 00 0 02 Control board thermistor 2 over temperature
Control system 00 0 03 I/O board thermistor over temperature
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