Specifications

94
Table 16 — Fault Description and Corrective Actions
*Fault Type indicates if the fault is: NOTE: VFD Troubleshooting should only be performed by a
Reliance Certified LiquiFlo2 technician.
FAULT
CODE
FAULT TYPE* DESCRIPTION ACTION
FAULT
STATE
2 Auxiliary Input 1 Input is open. Check remote wiring. 206
3 Power Loss 1, 3 DC bus voltage remained below 85% of
nominal for longer than Power Loss Time
(185).
Enable/disable with Fault Config 1 (238).
Monitor the incoming AC line for low voltage or
line power interruption.
149
215
4 UnderVoltage 1, 3 DC bus voltage fell below the minimum
value of 407V DC at 400/480V input.
Monitor the incoming AC line for low voltage or
power interruption.
149
215
5 OverVoltage 1 DC bus voltage exceeded maximum
value.
Monitor the AC line for high line voltage or tran-
sient conditions. Extend the decel time or check
RATED LINE VOLTAGE setting.
1 5 0
205
7 Motor Overload 1, 3 Internal electronic overload is set to trip
when the motor current equals 135% of
Motor NP FLA(42) for 1.5 seconds or
when PERCENT LOAD CURRENT is
sustained above 108%.
An excessive motor load exists. Reduce load so
drive output current does not exceed the MOTOR
NAMEPLATE AMPS setting.
217
8 Invtr Base Temp 1 Base temperature exceeded limit. 1. Check operation of VFD cooling solenoid, VFD
isolation valves, and humidity sensor.
2. Check for proper temperature and flow rate of
coolant.
219
9 Invtr IGBT Temp 1 Output transistors have exceeded their
maximum operating temperature.
1. Check operation of VFD cooling solenoid, VFD
isolation valves, and humidity sensor.
2. Check for proper temperature and flow rate of
coolant.
219
12 HW OverCurrent 1 The drive output current has exceeded
the hardware current limit.
Check programming. Check for excess load.
Contact Carrier Service.
246
13 Ground Fault 1 A current path to earth ground in excess
of 7% of drive rated amps has been
detected at one or more of the drive out-
put terminals.
Check the motor and external wiring to the drive
output terminals for a grounded condition.
220
24 Decel Inhibit 3 The drive is not following a commanded
deceleration because it is attempting to
limit bus voltage.
1. Verify input voltage is within drive specified
limits.
2. Verify system ground impedance follows proper
grounding techniques.
204
25 OverSpeed Limit 1 Functions such as slip compensation or
bus regulation have attempted to add an
output frequency adjustment greater
than that programmed in Overspeed
Limit (83).
Remove excessive load conditions. 206
29 Analog In Loss 1, 3 An analog input is configured to fault on
signal loss. A signal loss has occurred.
Configure with Anlg In 1, 2 Loss (324,
327).
1. Check parameters.
2. Check for broken/loose connections at inputs.
206
33 Auto Rstrt Tries 3 Drive unsuccessfully attempted to reset
a fault.
1. Correct the cause of the fault and manually
clear.
2. Check parameters in VFD_CONF screen
206
35 Current Fbk Lost 4 The magnitude of motor current feed-
back was less than 5% Motor NP FLA
(42) for the time configured in Imbalance
Time (50). Detection of this fault is dis-
abled when Imbalance Time (50) is set to
the maximum value of 10.0 seconds.
1. Verify connection of current feedback device
and motor terminals.
2. If fault repeats, replace current feedback
devices and/or power supply.
3. Check VFD_CONF screen parameters.
206
36 SW OverCurrent 1 The drive output current has exceeded
the software current.
1. Check for excess load. 246
37 Motor I Imbalance 4 Phase current displayed in Imbalance
Display (221) > percentage set in Imbal-
ance Limit (49) for time set in Imbalance
Time (50).
1. Press ICVC RESET key to clear fault.
2. Check motor leads and terminals.
225
38 Phase U to Grnd 4 A phase-to-ground fault has been
detected between the drive and motor in
this phase.
1. Check the wiring between the drive and motor.
2. Check motor for grounded phase.
3. Contact Carrier Service.
220
39 Phase V to Grnd 4
40 Phase W to Grnd 4
41 Phase UV Short 4 Excessive current has been detected
between these two output terminals.
1. Check the motor and drive output terminal
wiring for a shorted condition.
2. Contact Carrier Service, replace drive.
220
42 Phase VW Short 4
43 Phase UW Short 4
1—Auto-resettable
2—Non-resettable
3—User-configurable
4—Normal Fault resettable using Carrier ICVC
“RESET” softkey