Mitsubishi Electronics PURY-P400, P500YMF-C specifications 113, MF1~CNFAN

Checking code		Meaning, detecting method			Cause	Checking method & Countermeasure
4220	Bus	1 If VDC	400 V is de-	1)	The power supply voltage	• Check if an instantaneous stop or power failure, etc.
	voltage	tected during inverter			is abnormal.	has occurred.
	abnormality	operation.				• Check if the voltage is the rated voltage value.
				2)	The wiring is defective.	Check 1, the connections, 2, contact at the connectors, 3
						tightening torque at screw tightened portions, 4, wiring po-
						larities, 5, for broken wires, and 6, for grounding in the fol-
						lowing wiring.
						TB1A~NF~TB1B, TB1B~DS~[52C, R1, R5]~[C2,
						C3]~IPM Wiring
						CNDC1 (G / A) ~ CNVDC (INV) Wiring
						* Check if the wiring polarities are as shown on the wiring
						diagram plate.
				3)	The rush current prevention	To judge failure of R1 and R5, go to “Individual Parts Fail-
					resistors (R1, 5) are defective.	ure Judgment Methods.”
				4)	The electromagnetic contactor	To judge failure of the 52 C, go to	“Individual Parts Failure
					(52C) is defective.	Judgment Methods.”
				5)	The diode stack (DS) is	To judge failure of the DS, go to	“Individual Parts Failure
					defective.	Judgment Methods.”
				6)	The reactor (DCL) is defec-	To judge failure of the DCL, go to	“Individual Parts Failure
					tive.	Judgment Methods.”
				7)	The inverter output is	• Check the wiring between the IPM and the compressor.
					grounded.	• Check the compressor’s insulation resistance.
				8)	The IPM is defective.	Check the IPM.
						Judge that the IPM is fauly, (Go to “Individual Parts Failure
						Judgment Methods.”)
				9)	The circuit board is defec-	If none of the items in 1) to 8) is applicable, and if the trouble
					tive.	reappears even after the power is switched on again,
						replace the circuit board by following procedure (when re-
						placing the circuit board, be sure to connect all the connec-
						tors, ground wires, etc. securety)
						1 If the problem is solved after the G/A board only is re-
						placed, then the G/A board is defective.
						2 If the problem is not solved, reinstall the G/A board and
						replace the INV board. If the problem is solved, the INV
						board is defective.
						3 If the problem is not solved by 1 and 2 above, replace
						both boards.
4230	Radiator	If the cooling fan stays ON		1)	The wiring is defective.	Check 1 connections, 2 contact at the connectors and 3 for
	panel	for 5 minutes or longer dur-				broken wires in the following wiring.
	overheat	ing inverter operation, and				MF1~CNFAN
	protection	if THHS	100° C is de-
		tected.		2)	The INV boar’s fuse (F01)	If the fuse is defective, replace the fuse.
					is defective.
				3)	The cooling fan (MF1) is	To judge failure of the MF1, go to	“Individual Parts Failure
					defective.	Judgment Methods.”
				4)	The THHS sensor is defective.	To judge failure of the THHS, go to error code “5110”.
				5)	The air passage is clogged.	If the air passage of the heat sink is clogged, clear the air
						passage.
				6)	The IPM is defective.	Check the IPM.
						Judge that the IPM is fauly, (Go to “Individual Parts Failure
						Judgment Methods.”)
				7)	The circuit board is defec-	If none of the items in 1) to 6) is applicable, and if the trouble
					tive.	reappears even after the power is switched on again,
						replace the circuit board by following procedure (when re-
						placing the circuit board, be sure to connect all the connec-
						tors, ground wires, etc. securety)
						1 If the problem is solved after the G/A board only is re-
						placed, then the G/A board is defective.
						2 If the problem is not solved, reinstall the G/A board and
						replace the INV board. If the problem is solved, the INV
						board is defective.
						3 If the problem is not solved by 1 and 2 above, replace
						both boards.

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