Carrier 19XR - Page 17

17
Table 5 — Powerflex 755 Fault Code Descriptions and Corrective Actions
VFD
FAULT
CODE ON
VFD HIST
SCREEN
ICVC
FAULT
STATE
PIC6
FAULT
STATE
FAULT TYPE DESCRIPTION CORRECTIVE ACTION
NONE 206 449 Processor memory fault Consult VFD manual to resolve generic fault.
0 No Entry
2 207 439 Auxiliary Input Input is open.
Check Compressor Discharge High Pressure switch wiring
and accuracy.
Check for high condenser water temperatures, low water flow,
fouled tubes.
Check for division plate/gasket bypass. Check for
noncondensables in refrigerant.
3 210 425 Power Loss Line voltage dropout
Temporary loss of voltage. Disable Single Cycle Dropout in
VFD_CONF (PIC III)/CFGUMVFD (PIC6) screen.
4 215 429 Undervoltage Low DC bus voltage
Verify phase-to-phase and phase-to-ground line voltage. VFD
Circuit Board malfunction.
Contact Carrier Service.
5 205 (166) 430 Overvoltage High DC bus voltage
Verify phase to phase and phase to ground line voltage.
Monitor AC line for high transient voltage conditions.
7 217 434 Motor Overload An internal electronic overload trip has occurred.
Any phase current > 106% RLA. Can result from significant
load side current imbalance when running at full load.
Check entering condenser water temperature
and water flow rate.
Check Motor Rated Load Amps in VFD_CONF (PICIII)/
CFGUMVFD (PIC6) screen.
8 219 444 Heat Sink Overtemp
Heat sink temperature has exceeded maximum
operating temperature.
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.
9 219 444 Transistor Overtemp
The output transistors have exceeded maximum
operating temperature.
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.
12 286 438 HW Overcurrent
The drive output current has exceeded hardware
current limit.
Check for high entering water temperature or low condenser
water flow. Check current settings in VFD_CONF (PIC III)/
CFGUMVFD (PIC 6) screen.
13 220 432 Ground Fault
A current path to earth ground greater than 25% of
drive rating has occurred.
Check the motor, motor terminals, and external wiring to the
drive output terminals for a grounded condition.
14 206 432 Ground Warning
The ground current has exceeded the level set in
P467.
—
15 206 449 Load Loss
If this fault appears, there may be a problem with
software configuration.
To reset the processor, cycle power to chiller, check
VFD_CONF settings and save settings when exiting
VFD_CONF (PIC3)/CFGUMVFD (PIC6) configuration screen.
Check VFD parameters with Drive Explorer.
17
216 446
The DC bus ripple has
exceeded a preset level.
Line Voltage imbalance
Check phase-to-phase and phase-to-ground distribution bus
voltage. Increase Line Voltage % Imbalance in VFD_CONF
(PIC3)/CFGUMVFD (PIC6) screen.
20 206 449 TorqPrv Spd Band See VFD Fault Code 15. See VFD Fault Code 15.
21 225 445 Output PhaseLoss
The current in one or more phases has been lost
or remains below a preset level.
Check Motor Current % Imbalance in VFD_CONF (PIC3)/
CFGUMVFD (PIC6) screen.
24 204 442 Decel Inhibit
The drive is not following a commanded
deceleration because it is attempting to limit bus
voltage.
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.
33 206 449 AuRsts Exhausted See VFD Fault Code 15. See VFD Fault Code 15.
36 286 438 SW Overcurrent
The drive output current has exceeded the 1 ms
current rating.
Check for excess load, improper DC boost setting, DC brake
volts set too high.
38
220 432
Phase U to Gnd
GROUND FAULT
Check wiring between drive and motor.
Check motor for grounded phase.
Check motor terminals.
Replace drive.
39 Phase V to Gnd
40 Phase W to Gnd
41
220 449
Phase UV Short
GROUND FAULT
Check wiring between drive and motor.
Check motor terminals.
Replace drive.
42 Phase VW Short
43 Phase WU Short
44 206 432 Phase UNot ToGnd
GROUND FAULT (no LF2 equivalent)
Check wiring between drive and motor.
Check motor terminals.
Replace drive.
45 206 432 Phase VNot ToGnd
46 206 432 Phase WNot ToGnd
55 NONE 444 Ctrl Bd Inverter Overtemp
The temperature sensor on the main control board
detected excessive heat.
Check that VFD refrigerant isolation valves are open. Check
VFD refrigerant strainer.
61 206 449 Shear Pin 1 See VFD Fault Code 15. See VFD Fault Code 15.
62 206 449 Shear Pin 2 See VFD Fault Code 15. See VFD Fault Code 15.
64 206 449 Drive Overload Drive is overloaded.
Check for high entering water temperature or low condenser
water flow. Check current settings in VFD_CONF (PIC3)/
CFGUMVFD (PIC6) screen.
77 206 449 IR Volts Range See VFD Fault Code 15. See VFD Fault Code 15.
78 206 449 FluxAmpsRef Rang See VFD Fault Code 15. See VFD Fault Code 15.