Carrier 19XRV Start-Up And Service Instructions page 28

Table 6 — Typical Fault Code Descriptions and Corrective Actions* (cont)
DANFOSS ALARM/
DANFOSS ALARM PIC6 ALARM CODE PIC 6 - DESCRIPTION
WARNING CODE
39 Heat sink sensor
Warning - overload
40 of digital output
terminal 27.
Earth Fault While
45
Ramping
46 Power card supply
47 24 V supply low
48 1.8 V supply low
57 AMA internal fault
59 Current Limit
Control card over
65
temperature
Option module
67 configuration has
changed
68 Safe Stop activated
Power card
69
temperature
449 VFD Fault
449 VFD Fault
449 VFD Fault
449 VFD Fault
449 VFD Fault
449 VFD Fault
449 VFD Fault
449 VFD Fault
449 VFD Fault
449 VFD Fault
449 VFD Fault
449 VFD Fault
PIC6 DISPLAY
DANFOSS VFD ALARM
IN MAINTENANCE MENU
The power card does not sense the IGBT thermal
- sensor. Problem could be the power card, the
gatedrive card or the ribbon cable connection
between the power card and gatedrive card.
Check the load connection to terminal 27 and remove
the short-circuit connection.
There is current from the output phase to ground,
either in the cable between the drive and the motor,
or in the motor itself. The current transducers detect
the ground fault by measuring current going out from
the drive and current going into the drive from the
motor. Ground fault is issued if the deviation of the
two currents is too large. The current going out of the
drive must be the same as the current going into the
drive. Troubleshoot as follows: Remove AC power
from the drive and disconnect the motor. Power the
drive back on and reset the fault by pressing the
"Reset" key. Run the VFD with no motor to see if the
fault appears or if the drive runs without tripping.
Observe the motor current in the display. It should be
very close to zero with no motor connected.
Reconnect the motor and attempt to run the drive
again. If the drive trips on an "Alarm 14" with the
motor disconnected, then the problem is inside the
drive. A bad current sensor is most likely the cause of
this type of fault. If the drive runs without the motor
connected, but the current shown in the display is
greater than 0.3 amps then it has a faulty current
-
sensor. If the drive runs with no motor connected and
the current shown in the display is less than 0.3
amps, then the ground fault is likely in the connecting
cables or the motor. Check the motor and connected
cables with a megohmmeter to find out which has the
short. May need to check motor internal lugs with a
megohmmeter to find out if short is in the motor
terminal. reconnect the motor. In the event that there
is current shown in the display with no motor
connected, performing a "manual initialization" of the
drive might help in zeroing out the current sensors.
With power off, press and hold the "Status", "Main
Menu" and "OK" keys on the keypad (not provided).
Power the drive back on while holding the keys for 5
seconds. The drive will power up in an alarm 80
"Drive Initialization" if successful. WARNING: A
manual initialization will cause the drive to revert back
to factory default settings, wiping out all parameter
changes, any fault log data, and any personal menu
settings that have been made, so ensure the drive
parameter file with MCT 10 has been downloaded
prior to doing this reset.
The supply on the power card is out of range. Check
- for a defective power card, control card, option card,
24 V DC power supply, defective heat sink fan.
The supply on the power card is out of range. Check
24V Supply Fault
for a defective power card.
The 1.8 V DC supply used on the control card is
outside of the allowable limits. The supply is
1.8V Supply Fault measured on the control card. Check for a defective
control card. If an option card is present, check for
overvoltage.
AMA Not OK Not relevant; Carrier default has AMA =0 [off].
Current is higher than the value in P4-18 Current
-
Limit. Verify configured motor data.
The cutout temperature of the control card is 85°C
Ctrl Card overtemp (185°F). Check the following: Ambient temperature,
clogged filters, fan operation, control card.
One or more options have either been added or
Option Change removed since the last power-down. Check that the
configuration change is intentional and reset the unit.
Safe Torque Off (STO) has been activated. To
resume normal operation, apply 24 V DC to terminal
Safe Stop
37, then send a reset signal (via bus, digital I/O, or by
pressing [Reset]).
The power card temperature sensor is either too cold
or too hot. Verify ambient operating temperature,
-
check filters, verify fans are operating, check power
card.
28
DESCRIPTION AND
POSSIBLE CORRECTIVE ACTION
No feedback from the heat sink temperature sensor.