Emerson Unidrive M101 - Page 92

Safety
information
Product
information
Mechanical
installation
Electrical
installation
Getting
started
Basic
parameters
Running the
motor
Optimization NV Media Card
Advanced
parameters
Diagnostics UL Listing
92 Unidrive M100 / M101 Control User Guide
Issue Number: 1
PH.Lo Supply phase loss
32
The PH.Lo trip indicates that the drive has detected an input phase loss or large supply imbalance. The drive will attempt to
stop the motor before this trip is initiated. If the motor cannot be stopped in 10 seconds the trip occurs immediately. The
PH.Lo trip works by monitoring the ripple voltage on the DC bus of the drive, if the DC bus ripple exceeds the threshold, the
drive will trip on PH.Lo. Potential causes of the DC bus ripple are input phase loss, Large supply impedance and severe
output current instability.
Input phase loss detection can be disabled when the drive is required to operate from the DC supply or from a single phase
supply in Input Phase Loss Detection Mode (06.047).
Recommended actions:
• Check the AC supply voltage balance and level at full load
• Check the DC bus ripple level with an isolated oscilloscope
• Check the output current stability
• Check for mechanical resonance with the load
• Reduce the duty cycle
• Reduce the motor load
• Disable the phase loss detection, set Pr 06.047 to 2.
PSU Internal power supply fault
5
The PSU trip indicates that one or more internal power supply rails are outside limits or overloaded.
Recommended actions:
• There is a hardware fault within the drive – return the drive to the supplier
r.b.ht Hot rectifier/brake
250
Over-temperature detected on input rectifier or braking IGBT.
Recommended action:
• Increase ventilation by setting Cooling Fan Control (06.045) > 0.
Reserved Reserved trips
01
09
12
14-17
23, 29
38, 39
90 - 91, 92, 94 - 96
99
101 - 109
111
168 - 172
176 - 177
190 - 198
205 - 217
222 - 224
229 - 230, 233
238 - 244
249, 251 - 254
These trip numbers are reserved trip numbers for future use.
Trip Diagnosis
Source xx y zz
Control
system
00 0
00: Phase loss detected based on control system feedback. The drive
attempts to stop the drive before tripping unless bit 2 of Action On Trip
Detection (10.037) is set to one.
Source xx y zz Description
Control
system
00 0
00 Internal power supply overload.
Power
system
01 1
Trip Number Description
01, 09, 12, 14-17, 23, 29, 38, 39 Reserved resettable trip
90, 91, 92, 94-96, 99 Reserved resettable trip
101 - 109, 111 Reserved resettable trip
168-172, 176-177 Reserved resettable trip
190 – 198 Reserved resettable trip
205-217 Reserved resettable trip
222-224 Reserved non-resettable trip
229-230, 233 Reserved non-resettable trip
238 - 244, 249 Reserved non-resettable trip
251-254 Reserved non-resettable trip