Carrier 19XRV specifications Diode Checks, Meter Lead Meter Reading

Table 6 — Powerflex 755 Fault Code Descriptions and Corrective Actions (cont)

VFD
FAULT	ICVC
CODE
	FAULT	FAULT TYPE	DESCRIPTION	CORRECTIVE ACTION
ON VFD
	STATE
HIST
SCREEN
168		HeatSinkUnder-	Heatsink temperature sensor is reporting a value	Check heat sink temperature sensor. Check heat
	206		below -18.7 C (-1.66 F) or the sensor feedback
		Tmp		sink temperature.
			circuit is open.
210	206	HW En Jumper	See VFD Fault Code 15	See VFD Fault Code 15
		Out
211	206	Safety Brd Fault	See VFD Fault Code 15	See VFD Fault Code 15
213	206	Safety Jumper In	See VFD Fault Code 15	See VFD Fault Code 15
291	206	HSFan Lifwe	See VFD Fault Code 15	See VFD Fault Code 15
292	206	InFan Life	See VFD Fault Code 15	See VFD Fault Code 15
293	206	MtrBrg Life	See VFD Fault Code 15	See VFD Fault Code 15
294	206	MtrBrg Lube	See VFD Fault Code 15	See VFD Fault Code 15
295	206	MachBrg life	See VFD Fault Code 15	See VFD Fault Code 15
296	206	MachBrg Lube	See VFD Fault Code 15	See VFD Fault Code 15
315	206	Excess Psn Error	See VFD Fault Code 15	See VFD Fault Code 15
316	206	Node Fault Error	See VFD Fault Code 15	See VFD Fault Code 15

Checking Power Modules and Motor Input with Input Power Off — Use the following procedure 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.

Table 7 — Diode Checks

	METER LEAD		METER READING
(+)		(-)
R		DC+	0.5 V
S		DC+	0.5 V
T		DC+	0.5 V
R		DC-	infinite (OL)
S		DC-	Infinite (OL)
T		DC-	Infinite (OL)
U		DC+	0.5 V
V		DC+	0.5 V
W		DC+	0.5 V
U		DC-	infinite (OL)
V		DC-	Infinite (OL)
W		DC-	Infinite (OL)
DC+		R	Infinite (OL)
DC+		S	Infinite (OL)
DC+		T	Infinite (OL)
DC-		R	0.5 V
DC-		S	0.5 V
DC-		T	0.5 V
DC+		U	Infinite (OL)
DC+		V	Infinite (OL)
DC+		W	Infinite (OL)
DC-		U	0.5 V
DC-		V	0.5 V
DC-		W	0.5 V

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