Checking Power Modules And Motor Input; With Input Power Off - Carrier 19XRV Start-Up And Service Instructions

Table 6
—
VFD
FAULT
ICVC
CODE
FAULT FAULT TYPE
ON VFD
STATE
HIST
SCREEN
HeatSinkUnder-
168 206
Tmp
HW En Jumper
210 206
Out
211 206 Safety Brd Fault
213 206 Safety Jumper In
291 206 HSFan Lifwe
292 206 InFan Life
293 206 MtrBrg Life
294 206 MtrBrg Lube
295 206 MachBrg life
296 206 MachBrg Lube
315 206 Excess Psn Error
316 206 Node Fault Error

Checking Power Modules and Motor Input

with Input Power Off —
to check the drive's power module circuitry with power off:
1. Turn off and lock out input power. Wait five minutes.
2. Verify there is no voltage at the drive's input power termi-
nals.
3. Using a voltmeter, check the DC bus potential as de-
scribed above to ensure the DC bus capacitors are dis-
charged.
4. Disconnect the motor from the drive.
5. Check all AC line and DC bus fuses.
6. Use a multimeter to check the input diodes and output
IGBTs if a fuse is open.
7. Check motor impedance.
8. Reconnect the motor to the drive.
9. Reapply input power. See Tables 7 and 8.
WARNING
Confirm that the DC bus has discharged before performing
diode checks.
Powerflex 755 Fault Code Descriptions and Corrective Actions (cont)
DESCRIPTION
Heatsink temperature sensor is reporting a value
below -18.7 C (-1.66 F) or the sensor feedback
circuit is open.
See VFD Fault Code 15
See VFD Fault Code 15
See VFD Fault Code 15
See VFD Fault Code 15
See VFD Fault Code 15
See VFD Fault Code 15
See VFD Fault Code 15
See VFD Fault Code 15
See VFD Fault Code 15
See VFD Fault Code 15
See VFD Fault Code 15
Use the following procedure
Check heat sink temperature sensor. Check heat
sink temperature.
See VFD Fault Code 15
See VFD Fault Code 15
See VFD Fault Code 15
See VFD Fault Code 15
See VFD Fault Code 15
See VFD Fault Code 15
See VFD Fault Code 15
See VFD Fault Code 15
See VFD Fault Code 15
See VFD Fault Code 15
See VFD Fault Code 15
Table 7
METER LEAD
(+)
R
S
T
R
S
T
U
V
W
U
V
W
DC+
DC+
DC+
DC-
DC-
DC-
DC+
DC+
DC+
DC-
DC-
DC-
NOTE: Digital meters require a special diode check function
because the current sourced by the meter during a normal resis-
tance (Ohms) test is too low to accurately test a diode. Make sure
the meter is set to the diode test function. Voltage readings may not
be exact as shown in above tables, but look for consistency during
each of the 4 tests. When performing a test that should return infinity
(OL) as shown in above tables, you may see a value slowly climbing
toward infinity. This is a result of the meter charging a capacitor and
is normal.
22
CORRECTIVE ACTION
Diode Checks
—
METER READING
(-)
DC+ 0.5 V
DC+ 0.5 V
DC+ 0.5 V
DC- infinite (OL)
DC- Infinite (OL)
DC- Infinite (OL)
DC+ 0.5 V
DC+ 0.5 V
DC+ 0.5 V
DC- infinite (OL)
DC- Infinite (OL)
DC- Infinite (OL)
R Infinite (OL)
S Infinite (OL)
T Infinite (OL)
R 0.5 V
S 0.5 V
T 0.5 V
U Infinite (OL)
V Infinite (OL)
W Infinite (OL)
U 0.5 V
V 0.5 V
W 0.5 V