Troubleshooting 4-7
Output PhaseLoss 21 Current in one or more phases
has been lost or remains below a
preset level.
Check the drive and motor wiring.
Check for phase-to-phase continuity
at the motor terminals. Check for
disconnected motor leads.
OverSpeed Limit 25
➀
Functions such as Slip
Compensation or Bus Regulation
have attempted to add an output
frequency adjustment greater
than that programmed in
[Overspeed Limit].
Remove excessive load or
overhauling conditions or increase
[Overspeed Limit].
OverVoltage 5
➀
DC bus voltage exceeded
maximum value.
Monitor the AC line for high line
voltage or transient conditions. Bus
overvoltage can also be caused by
motor regeneration. Extend the decel
time or install dynamic brake option.
Parameter
Chksum
100
➁
The checksum read from the
board does not match the
checksum calculated.
1. Restore defaults.
2. Reload User Set if used.
Params Defaulted 48 The drive was commanded to
write default values to EEPROM.
1. Clear the fault or cycle power to
the drive.
2. Program the drive parameters as
needed.
Phase U to Grnd 38 A phase to ground fault has been
detected between the drive and
motor in this phase.
1. Check the wiring between the
drive and motor.
2. Check motor for grounded phase.
3. Replace drive.
Phase V to Grnd 39
Phase W to Grnd 40
Phase UV Short 41 Excessive current has been
detected between these two
output terminals.
1. Check the motor and drive output
terminal wiring for a shorted
condition.
2. Replace drive.
Phase VW Short 42
Phase UW Short 43
Port 1-5 DPI Loss 81-
85
➁
DPI port stopped communicating.
A SCANport device was
connected to a drive operating
DPI devices at 500k baud.
1. If adapter was not intentionally
disconnected, check wiring to the
port. Replace wiring, port
expander, adapters, Main Control
Board or complete drive as
required.
2. Check HIM connection.
3. If an adapter was intentionally
disconnected and the [Logic
Mask] bit for that adapter is set to
“1”, this fault will occur. To disable
this fault, set the [Logic Mask] bit
for the adapter to “0.”
Port 1-5 Adapter 71-
75
The communications card has a
fault.
1. Check DPI device event queue
and corresponding fault
information for the device.
Fault
No.
Type
(1)
Description Action
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