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Table 6 — Powerflex 755 Fault Code Descriptions and Corrective Actions (cont)
VFD |
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FAULT | ICVC |
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CODE |
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FAULT | FAULT TYPE | DESCRIPTION | CORRECTIVE ACTION | ||
ON VFD | |||||
STATE |
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HIST |
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SCREEN |
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168 |
| HeatSinkUnder- | Heatsink temperature sensor is reporting a value | Check heat sink temperature sensor. Check heat | |
206 | below | ||||
Tmp | sink temperature. | ||||
|
| circuit is open. | |||
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210 | 206 | HW En Jumper | See VFD Fault Code 15 | See VFD Fault Code 15 | |
Out | |||||
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211 | 206 | Safety Brd Fault | See VFD Fault Code 15 | See VFD Fault Code 15 | |
213 | 206 | Safety Jumper In | See VFD Fault Code 15 | See VFD Fault Code 15 | |
291 | 206 | HSFan Lifwe | See VFD Fault Code 15 | See VFD Fault Code 15 | |
292 | 206 | InFan Life | See VFD Fault Code 15 | See VFD Fault Code 15 | |
293 | 206 | MtrBrg Life | See VFD Fault Code 15 | See VFD Fault Code 15 | |
294 | 206 | MtrBrg Lube | See VFD Fault Code 15 | See VFD Fault Code 15 | |
295 | 206 | MachBrg life | See VFD Fault Code 15 | See VFD Fault Code 15 | |
296 | 206 | MachBrg Lube | See VFD Fault Code 15 | See VFD Fault Code 15 | |
315 | 206 | Excess Psn Error | See VFD Fault Code 15 | See VFD Fault Code 15 | |
316 | 206 | Node Fault Error | See VFD Fault Code 15 | See VFD Fault Code 15 |
Checking Power Modules and Motor Input with Input Power Off — Use the following procedure to check the drive’s power module circuitry with power off:
1.Turn off and lock out input power. Wait five minutes.
2.Verify there is no voltage at the drive’s input power termi- nals.
3.Using a voltmeter, check the DC bus potential as de- scribed above to ensure the DC bus capacitors are dis- charged.
4.Disconnect the motor from the drive.
5.Check all AC line and DC bus fuses.
6.Use a multimeter to check the input diodes and output IGBTs if a fuse is open.
7.Check motor impedance.
8.Reconnect the motor to the drive.
9.Reapply input power. See Tables 7 and 8.
WARNING
Confirm that the DC bus has discharged before performing diode checks.
Table 7 — Diode Checks
| METER LEAD | METER READING | |
(+) |
| ||
|
| ||
R |
| DC+ | 0.5 V |
S |
| DC+ | 0.5 V |
T |
| DC+ | 0.5 V |
R |
| DC- | infinite (OL) |
S |
| DC- | Infinite (OL) |
T |
| DC- | Infinite (OL) |
U |
| DC+ | 0.5 V |
V |
| DC+ | 0.5 V |
W |
| DC+ | 0.5 V |
U |
| DC- | infinite (OL) |
V |
| DC- | Infinite (OL) |
W |
| DC- | Infinite (OL) |
DC+ |
| R | Infinite (OL) |
DC+ |
| S | Infinite (OL) |
DC+ |
| T | Infinite (OL) |
DC- |
| R | 0.5 V |
DC- |
| S | 0.5 V |
DC- |
| T | 0.5 V |
DC+ |
| U | Infinite (OL) |
DC+ |
| V | Infinite (OL) |
DC+ |
| W | Infinite (OL) |
DC- |
| U | 0.5 V |
DC- |
| V | 0.5 V |
DC- |
| W | 0.5 V |
NOTE: Digital meters require a special diode check function because the current sourced by the meter during a normal resis- tance (Ohms) test is too low to accurately test a diode. Make sure the meter is set to the diode test function. Voltage readings may not be exact as shown in above tables, but look for consistency during each of the 4 tests. When performing a test that should return infinity (OL) as shown in above tables, you may see a value slowly climbing toward infinity. This is a result of the meter charging a capacitor and is normal.
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