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Table 6 — Powerflex 755 Fault Code Descriptions and Corrective Actions (cont)
VFD
FAULT
CODE
ON VFD
HIST
SCREEN
38
39
ICVC
FAULT
STATE
220
40
41
42
FAULT TYPE
Phase U to Gnd
Phase V to Gnd
DESCRIPTION
Check the wiring between the drive and the
motor.
Check motor for grounded phase.
Check Motor terminals. d. Replace drive.
Check the wiring between the drive and the
motor.
Check Motor terminals.
Replace drive.
GROUND FAULT
Phase W to Gnd
246
43
Phase UV Short
Phase VW Short
CORRECTIVE ACTION
GROUND FAULT
Phase WU Short
44
206
Phase UNot
45
206
46
206
Phase VNot ToGnd GROUND FAULT (no LF2 equivalent)
Phase WNot
55
NONE
61
62
206
206
Shear Pin 1
Shear Pin 2
The temperature sensor on the main control
board detected excessive heat.
See VFD Fault Code 15
See VFD Fault Code 15
64
206
Drive Overload
Drive is overloaded
65
77
206
206
See VFD Fault Code 15
See VFD Fault Code 15
78
206
OW TrqLvlTimeout
IR Volts Range
FluxAmpsRef
Rang
Check that VFD refrigerant isolation valves are
open.Check VFD refrigerant strainer
See VFD Fault Code 15
See VFD Fault Code 15
Check for high entering water temperature or low
condenser water flow. Check current settings in
VFD_CONF screen.
See VFD Fault Code 15
See VFD Fault Code 15
See VFD Fault Code 15
See VFD Fault Code 15
79
206
Excessive Load
80
206
AutoTune Aborted
Inverter Overtemp
Motor did not come up to speed in the allotted
time
See VFD Fault Code 15
Ixo voltae calculated from motor nameplate data
is too high.
See VFD Fault Code 15
See VFD Fault Code 15
See VFD Fault Code 15
See VFD Fault Code 15
See VFD Fault Code 15
See VFD Fault Code 15
87
206
IXo VoltageRange
91
93
94
95
96
97
206
206
206
206
206
206
Pri VelFdbk Loss
HW Enable Check
Alt VelFdbk Loss
Aux VelFdbk Loss
PositionFdbkLoss
Auto Tach Switch
100
206
The checksum read from the board does not
Parameter Chksum match the checksum calculated.
107
NONE
113
206
Tracking DataErr
Internal data error.
124
141
142
143
144
145
206
206
206
206
206
206
App ID Changed
Autn Enc Angle
Autn Spd Rstrct
Autotune CurReg
Autotune Inertia
Autotune Travel
Application firmware changed.
P78 [Encdrlss AngComp] is out of range
See VFD Fault Code 15
See VFD Fault Code 15
See VFD Fault Code 15
See VFD Fault Code 15
The main control board was moved to a different
Replaced MCB-PB power structure. Data set to default values.
21
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Check the wiring between the drive and the
motor.
Check Motor terminals.
Replace drive.
Check that guide vanes are closed completely.
Check for high entering water temperature or low
condenser flow.
Repeat Autotune
See VFD Fault Code 15
Re-enter motor nameplate data in VFD_CONF
screen.
See VFD Fault Code 15
See VFD Fault Code 15
See VFD Fault Code 15
See VFD Fault Code 15
See VFD Fault Code 15
See VFD Fault Code 15
Press ICVC reset.
Check VFD_CONF parameters.
Cycle power to the drive.
Press ICVC reset.
Check VFD_CONF parameters.
Cycle power to the drive.
Press ICVC reset.
Cycle power to the drive
Verify application version.
See VFD Fault Code 15
See VFD Fault Code 15
See VFD Fault Code 15
See VFD Fault Code 15
See VFD Fault Code 15