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Table 35 — Fault and Alarm Codes for ACH580 VFD
CODE (HEX) WARNING / AUX. CODE CAUSE WHAT TO DO
A2B1 Overcurrent
Output current has exceeded
internal fault limit.
In addition to an actual overcurrent
situation, this warning may also be
caused by an earth fault or supply
phase loss.
Check motor load.
Check acceleration times in parameter group 23 Speed
reference ramp (speed control) or 28 Frequency reference chain
(frequency control). Also check parameters 46.01 Speed scaling,
46.02 Frequency scaling and 46.03 Torque scaling.
Check motor and motor cable (including phasing and delta/star
connection). Check for an earth fault in motor or motor cables by
measuring the insulation resistances of motor and motor cable.
See chapter Electrical installation, section Checking the
insulation of the assembly in the Hardware manual of the drive.
Check there are no contactors opening and closing in motor
cable.
Check that the start-up data in parameter group 99 Motor data
corresponds to the motor rating plate.
Check that there are no power factor correction capacitors or
surge absorbers in motor cable.
A2B3 Earth leakage
Drive has detected load unbalance
typically due to earth fault in motor
or motor cable.
Check there are no power factor correction capacitors or surge
absorbers in motor cable.
Check for an earth fault in motor or motor cables by measuring
the insulation resistances of motor and motor cable. See chapter
Electrical installation, section Checking the insulation of the
assembly in the Hardware manual of the drive. If an earth fault is
found, fix or change the motor cable and/or motor. If no earth
fault can be detected, contact your local Carrier representative.
A2B4 Short circuit
Short-circuit in motor cable(s) or
motor.
Check motor and motor cable for cabling errors.
Check motor and motor cable (including phasing and delta/star
connection). Check for an earth fault in motor or motor cables by
measuring the insulation resistances of motor and motor cable.
See chapter Electrical installation, section Checking the
insulation of the assembly in the Hardware manual of the drive.
Check there are no power factor correction capacitors or surge
absorbers in motor cable.
A6A4 Motor nominal value
The motor parameters are set
incorrectly.
Check the auxiliary code. See actions for each code below.
A6A4 Motor nominal value 0001
The drive is not dimensioned
correctly.
Check the auxiliary code. See actions for each code below.
Check the settings of the motor configuration parameters in
groups 98 and 99.
Check that the drive is sized correctly for the motor.
A780
Motor stall Programmable
warning: 31.24 Stall function
Motor is operating in stall region
because of, for example, excessive
load or insufficient motor power.
Check motor load and drive ratings. Check fault function
parameters.
A783 Motor overload Motor current is too high.
Check for overloaded motor.
Adjust the parameters used for the motor overload function
(35.51...35.53) and 35.55...35.56.
A784 Motor disconnect
All three output phases are
disconnected from motor.
Check that switches between drive and motor are closed.
Check that all cables between drive and motor are connected
and secured. If no issue was detected and drive output was
actually connected to motor, contact Carrier.
A7AB
Extension I/O configuration
failure
Installed extension module is not
the same as configured.
Check that the installed extension module (shown by parameter
15.02 Detected extension module) is the same as selected by
parameter 15.01 Extension module type.
A7C1
FBA A communication
Programmable warning:
50.02 FBA A comm loss
func
Cyclical communication between
drive and fieldbus adapter module A
or between PLC and fieldbus
adapter module A is lost.
Check status of fieldbus communication. See user
documentation of fieldbus interface.
Check settings of parameter groups 50 Fieldbus adapter (FBA),
51 FBA A settings, 52 FBA A data in and 53 FBA A data out.
Check cable connections.
Check if communication master is able to communicate.
A7CE
EFB comm loss
Programmable warning:
58.14 Communication loss
action
Communication break in embedded
fieldbus (EFB) communication.
Check the status of the fieldbus master (online/offline/error etc.).
Check cable connections to the EIA-485/X5 terminals 29, 30 and
31 on the control unit.
A7EE
Panel loss Programmable
warning: 49.05
Communication loss action
Control panel or PC tool selected as
active control location for drive has
ceased communicating.
Check PC tool or control panelcconnection.
Check control panel connector.
Check mounting platform if being used. Disconnect and
reconnect the control panel.
A88F Cooling fan Maintenance timer limit exceeded.
Consider changing the cooling fan. Parameter 05.04 Fan on-
time counter shows the running time of the cooling fan.
AFAA Auto reset A fault is about to be auto reset.
Informative warning. See the settings in parameter group 31
Fault functions.
AFE1 Emergency stop (off2)
Drive has received an emergency
stop (mode selection off2)
command.
Check that it is safe to continue operation. Then return
emergency stop push button to normal position. Restart drive.
If the emergency stop was unintentional, check the source
selected by parameter 21.05 Emergency stop source.
AFE2
Emergency stop (off 1 or
off3)
Drive has received an emergency
stop (mode selection off1 or off3)
command.
Check that it is safe to continue operation. Then return
emergency stop push button to normal position. Restart drive.
If the emergency stop was unintentional, check the source
selected by parameter 21.05 Emergency stop source.
Informative warning. See parameter 21.22 Start delay.
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