Carrier 19XRV Start-Up And Service Instructions page 20

Table 6
VFD
FAULT
ICVC
CODE
FAULT FAULT TYPE
ON VFD
STATE
HIST
SCREEN
NONE 206
0 No Entry
2 207 Auxiliary Input
3 210 Power Loss
4 215 Undervoltage
5 166 Overvoltage
7 217 Motor Overload
Heat Sink Over-
8 219
temp
Transistor Over-
9 219
temp
12 286 HW Overcurrent
13 220 Ground Fault
14 206 Ground Warning
15 206 Load Loss
The DC bus ripple
17 216 has exceeded a
preset level.
20 206 TorqPrv Spd Band
21 225 Output PhaseLoss
24 204 Decel Inhibit
33 206 AuRsts Exhausted
36 286 SW Overcurrent
Powerflex 755 Fault Code Descriptions and Corrective Actions
—
DESCRIPTION
Processor memory fault
Input is open.
Line voltage dropout
Low DC bus voltage
High DC bus voltage
An internal electronic overload trip has occurred.
Heat sink temperature has exceeded the maxi-
mum operating temperature
The output transistors have exceeded the maxi-
mum operating temperature
The drive output current has exceeded the hard-
ware current limit.
A current path to earth ground greater than 25%
of drive rating has occurred.
The ground current has exceeded the level set in
P467
If this fault appears, there may be a problem with
software configuration.
Line Voltage imbalance
See VFD Fault Code 15
The current in one or more phases has been lost
or remains below a preset level.
The drive is not following a commanded decelera-
tion because it is attempting to limit the bus volt-
age.
See VFD Fault Code 15
The drive output current has exceeded the 1 ms
current rating.
Consult VFD manual to resolve generic fault.
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.
Temporary loss of voltage. Disable Single Cycle
Dropout in VFD_CONF sceen.
Verify phase-to-phase and phase-to-ground line
voltage. VFD Circuit Board malfunction.
Call 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
running at full load.
Check entering condenser water temperature
and water flow rate.
Check Motor Rated Load Amps in VFD_CONF
screen.
Check that VFD refrigerant isolation valves are
open.
Check VFD refrigerant cooling orifice and refrig-
erant 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 refrig-
erant strainer.
Check for proper VFD cooling fan operation and
air flow blockage.
Check for high entering water temperature or low
condenser water flow. Check current settings in
VFD_CONF screen.
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 ICVC VFD_CONF settings and save set-
tings when exiting VFD_CONF screen.
Check VFD parameters with Drive Explorer.
Check phase-to-phase and phase-to-ground dis-
tribution bus voltage. Increase Line Voltage %
Imbalance in VFD_CONF screen.
See VFD Fault Code 15
Check Motor Current % Imbalance in
VFD_CONF 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.
20
CORRECTIVE ACTION