Carrier D2-3466-2 Indentifying PMC Board Fault Codes and Recovering, Status of LEDs, 6-15

6.6Indentifying PMC Board Fault Codes and Recovering

ATTENTION: Viewing the PMC board LEDs requires electrical circuits to be exposed. Stay clear if unit must be running. Disconnect and lock

!out or tag power source if contact must be made. Failure to observe this precaution could result in severe bodily injury or loss of life.

Table 6.5 lists PMC board fault codes. These faults can be identified using the three LEDs located on the Regulator board.

Table 6.5 – PMC Board Fault Codes

Status of LEDs 1-3	Fault Description	Corrective Action
LEDs 1-3 all on.	Normal operation	None required.
	(60 Hz, 50% duty);
	no fault.
LEDs 1-3 all off.	VAC_LINE = ‘lo’	None required. The board will
		recover when the line
		becomes present.
LEDs 1-3 flash in a	VDC_CHG = ‘lo’	Reset board.
3-flash sequence.
LEDs 1-3 flash in a	ASYM_FAULT = ‘lo’	Reset board.
2-flash sequence.
LEDs 1-3 flash in a	ACGNDFLT = ‘lo’	Reset board. (This circuit was
1-flash sequence.		removed on the 350 HP
		assembly.)

6.7Resetting a Checksum (CHS) Fault

Perform the following procedure when a new Regulator board is installed or if a CHS fault repeats.

Step 1. Press and hold STOPIRESET, PROGRAM, and DOWN ARROW for 5 to 10 seconds. A PUn error should appear.

Step 2. Press PROGRAM. P.--- is displayed.

Step 3. Press ENTER. P.000 is displayed.

Perform steps 4 through 7 if access to the second menu has not already been enabled.

Step 4. Press UP ARROW until P.006 is displayed.

Step 5. Press ENTER.

Step 6. Press UP ARROW until 107 is displayed.

Step 7. Press ENTER.

Perform steps 8 through 11 if changing modes of operation (V/Hz or Vec). Otherwise, skip to step 12.

Troubleshooting the Drive 6-15