Carrier 19XRV Start-Up And Service Instructions page 12

Table 5 — PIC6 Powerflex 755 Fault Code Descriptions and Corrective Actions
VFD 23XRV 19XRV
FAULT FAULT FAULT
CODE STATE STATE
NONE
* 449
0
*
2 * 439
3 * 425
4
* 429
5 * 430
7 * 434
8
* 444
9 * 444
12 * 438
13 * 432
14 * 432
15 * 449
17
* 446
20
* 449
21
* 445
24
* 442
33 * 449
36 * 438
38
39 * 432
40
41
42
* 449
43
44
* 432
45 * 432
46
* 432
55 * 444
61
* 449
62 * 449
FAULT TYPE
Processor memory fault
No Entry
Auxiliary Input Input is open.
Power Loss Line voltage dropout
Undervoltage Low DC bus voltage
Overvoltage High DC bus voltage
An internal electronic overload trip has
Motor Overload
occurred.
Heat Sink Heat sink temperature has exceeded
Overtemp maximum operating temperature.
Transistor The output transistors have exceeded
Overtemp maximum operating temperature.
The drive output current has exceeded
HW Overcurrent
hardware current limit.
A current path to earth ground greater
Ground Fault
than 25% of drive rating has occurred.
The ground current has exceeded the
Ground Warning
level set in P467.
If this fault appears, there may be a prob-
Load Loss
lem with software configuration.
The DC bus ripple
has exceeded a Line Voltage imbalance
preset level.
TorqPrv Spd Band See VFD Fault Code 15
The current in one or more phases has
Output PhaseLoss
been lost or remains below a preset level.
The drive is not following a commanded
Decel Inhibit deceleration because it is attempting to
limit bus voltage.
AuRsts Exhausted See VFD Fault Code 15
The drive output current has exceeded
SW Overcurrent
the 1 ms current rating.
Phase U to Gnd
Phase V to Gnd GROUND FAULT
Phase W to Gnd
Phase UV Short
Phase VW Short GROUND FAULT
Phase WU Short
Phase UNot ToGnd
Phase VNot ToGnd
GROUND FAULT (no LF2 equivalent)
Phase WNot
Ctrl Bd Inverter The temperature sensor on the main con-
Overtemp trol board detected excessive heat.
Shear Pin 1 See VFD Fault Code 15
Shear Pin 2 See VFD Fault Code 15
DESCRIPTION
Consult VFD manual to resolve generic fault.
Check Compressor Discharge High Pressure
switch wiring and accuracy. Check for high con-
denser water temperatures, low water flow, fouled
tubes. Check for division plate/gasket bypass.
Check for noncondensables in refrigerant.
Temporary loss of voltage. For 19XRV, disable
Single Cycle Dropout in CFGUMVFD (PIC6)
screen.
Verify phase-to-phase and phase-to-ground line
voltage. VFD Circuit Board malfunction.
Contact Carrier Service.
Verify phase to phase and phase to ground line
voltage. Monitor AC line for high transient voltage
conditions.
Any phase current > 106% RLA. Can result from
significant load side current imbalance when run-
ning at full load. Check entering condenser water
temperature and water flow rate. Check Motor
Rated Load Amps in CFGUMVFD (PIC6) screen.
Check that VFD refrigerant isolation valves are
open. Check VFD refrigerant cooling orifice and
refrigerant strainer. Check for proper VFD cooling
fan operation and air flow blockage.
Check that VFD refrigerant isolation valves are
open. Check VFD refrigerant cooling orifice and
refrigerant strainer. Check for proper VFD cooling
fan operation and air flow blockage.
Check for high entering water temperature or low
condenser water flow. For 19XRV, check current
settings in CFGUMVFD screen. For 23XRV,
check current settings.
Check the motor, motor terminals, and external
wiring to the drive output terminals for a grounded
condition.
To reset the processor, cycle power to chiller,
check settings and save settings when exiting
CFGUMVFD (PIC6) configuration screen.
Check VFD parameters with Drive Explorer.
Check phase-to-phase and phase-to-ground
distribution bus voltage. For 19XRV, increase Line
Voltage % Imbalance in CFGUMVFD (PIC6)
screen.
See VFD Fault Code 15
For 19XRV, check Motor Current % Imbalance in
CFGUMVFD (PIC6) screen.
Verify input voltage is within drive specified limits.
Verify system ground impedance follows proper
grounding techniques. Disable bus regulation
P186 and/or add dynamic brake resistor and/or
extend deceleration time P537 and P538.
See VFD Fault Code 15
Check for excess load, improper DC boost set-
ting, DC brake volts set too high.
Check wiring between drive and motor. Check
motor for grounded phase. Check motor termi-
nals. Replace drive.
Check wiring between drive and motor. Check
motor terminals. Replace drive.
Check wiring between drive and motor. Check
motor terminals. Replace drive.
Check that VFD refrigerant isolation valves are
open. Check VFD refrigerant strainer.
See VFD Fault Code 15
See VFD Fault Code 15
12
CORRECTIVE ACTION
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