Carrier Motormaster V Fault Codes and Solutions for 50P3 Models

EPM Chip — The drive uses a electronic programming module (EPM) chip to store the program parameters. This is an EEPROM memory chip and is accessible from the front of the VFD. It should not be removed with power applied to the VFD.

Loss of CCN Communications — Carrier Comfort Network® (CCN) communications with external control systems can be affected by high frequency electrical noise

generated by the Motormaster® V control. Ensure unit is well grounded to eliminate ground currents along communication lines.

If communications are lost only while Motormaster V con- trol is in operation, order a signal isolator (CEAS420876-2) and power supplies (CEAS221045-01, 2 required) for the CCN communication line.

Table 6 — Fault Codes

The drive is programmed to automatically restart after a fault and will attempt to restart three times after a fault (the drive will not restart after CF, cF, GF, F1, F2-F9, or Fo faults). If all three restart attempts are unsuccessful, the drive will trip into FAULT LOCKOUT (LC), which requires a manual reset.

	CODE	DESCRIPTION	RESET	PROBABLE CAUSE	CORRECTIVE ACTION
			METHOD
	AF	High Temperature Fault	Automatic	Ambient temperature is too high;	Check cooling fan operation.
				Cooling fan has failed (if equipped).
	CF	Control Fault	Manual	A blank EPM, or an EPM with cor-	Perform a factory reset using Parameter
				rupted data has been installed.	48 – PROGRAM SELECTION. See Drive
					Programming section.
	cF	Incompatibility Fault	Manual	An EPM with an incompatible param-	Either remove the EPM or perform a fac-
				eter version has been installed.	tory reset (Parameter 48) to change the
					parameter version of the EPM to match
					the parameter version of the drive.
	F1	EPM Fault	Manual	The EPM is missing or damaged.	Install EPM or replace with new EPM.
	F2—F9	Internal Faults	Manual	The control board has sensed a	Consult factory.
	Fo			problem
	GF	Data Fault	Manual	User data and Carrier defaults in the	Restore factory defaults by toggling P48 to
				EPM are corrupted.	another mode. Then set P48 to desired
					mode to restore all defaults for that mode.
					See Drive Programming section. If that
					does not work, replace EPM.
	HF	High DC Bus Voltage Fault	Automatic	Line voltage is too high; Deceleration	Check line voltage — set P01
				rate is too fast; Overhauling load.	appropriately.
	JF	Serial Fault	Automatic	The watchdog timer has timed out,	Check serial connection (computer).
				indicating that the serial link has been	Check settings for P15.
				lost.	Check settings in communication software
					to match P15.
	LF	Low DC Bus Voltage Fault	Automatic	Line voltage is too low.	Check line voltage — set P01
					appropriately.
	OF	Output Transistor Fault	Automatic	Phase to phase or phase to ground	Reduce boost or increase acceleration
				short circuit on the output; Failed out-	values. If unsuccessful, replace drive.
				put transistor; Boost settings are too
				high; Acceleration rate is too fast.
	PF	Current Overload Fault	Automatic	VFD is undersized for the application;	Check line voltage – set P01 appropri-
				Mechanical problem with the driven	ately.
				equipment.	Check for dirty coils.
					Check for motor bearing failure.
	SF	Single-phase Fault	Automatic	Single-phase input power has been	Check input power phasing.
				applied to a three-phase drive.
Drive displays		Start Contact is Not Closed	Automatic	Start contact is missing or not	Check fan relay.
‘---’ even				functioning.
though drive
should be
running
VFD flashes		Start Contact is Not Closed	Automatic	Start contact not closed.	Check FR for closed contact.
	“---”
and LCS
VFD flashes		Speed Signal Lost	Automatic	Speed signal lost. Drive will operate	Transducer signal lost. Check VDC signal
57 (or 47)				at 57 (or 47) Hz until reset or loss of	between TB5 and TB2. Should be in range
and LCS				start command. Resetting requires	of 0.5V to 4.5V. 5VDC output should be
				cycling start command (or power).	present between TB6 and TB2.
	LEGEND
EPM — Electronic Programming Module
FR	— Fan Relay
LCS	— Loss of Control Signal
TB	— Terminal Block

VFD — Variable Frequency Drive

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