Mitsubishi Electronics PURY-P400, P500YMF-C specifications 123

Checking						Meaning, detecting method
code
6607		No ACK error			When no ACK signal is detected in 6 continuous times with 30 second
(continued)					interval by transmission side controller, the transmission side detects error.
						Note: The address/attribute shown on remote controller indicates the
						controller not providing the answer (ACK).
System	Generating		Display of	Detecting
compo-						Cause				Checking method & countermeasure
sition	unit address		trouble	method
	1 Outdoor		Remote	No reply	As same that for single refrigerant system.				Same countermeasure as that for single
		unit (OC)	controller	(ACK) at OC					refrigerant system.
			(RC)	transmis-
				sion to BC
	2 BC		Remote	No reply	As same that for single refrigerant system.				Same countermeasure as that for single
		controller	controller	(ACK) at					refrigerant system.
		<master>	(RC)	BC <master>
		(BC)		transmis-
				sion to IC
	3 BC		Remote	No reply	As same that for single refrigerant system.				Same countermeasure as that for single
		controller	controller	(ACK) at					refrigerant system.
		<slave>	(RC)	BC <slave>
		(BS)		transmission
				to BC <master>
	4 Indoor		Remote	No reply	Same cause of that for grouping from plural re-				Same countermeasure as that for IC unit
		unit (IC)	controller	(ACK) at IC	frigerants.				error in plural refrigerant system.
			(RC)	transmis-
				sion RC
			System	No reply	Trouble of partial IC units:				→ Same countermeasure as that for
(MELANS)			controller	(ACK) at IC	1) Same cause as that for single refrigerant system.					single refrigerant system.
			(SC)	transmis-
				sion to SC	Trouble of all IC in one refrigerant system:				Confirm OC trouble diagnosis LED.
					1)	Cause of total capacity error.		(7100)	→ At trouble generation, check for the
					2)	Cause of capacity code setting error.		(7101)		content according to check code.
controller
					3)	Cause of connecting number error.		(7102)	Check the content of 5)~7) shown left.
					4)	Cause of address setting error.		(7105)
					5)	Disconnection or short circuit of transmission line
						of OC unit terminal block for central control (TB7).
system
					6) Power source shut down of OC unit.
					7) Trouble of OC unit electrical system.
with					Trouble of all IC:				Confirm voltage of transmission line for
					1) As same that for single refrigerant system.				centralized control.
system
					2) Insertion of power supply connector (CN40) into				•	More than 20V →	Confirm 1) 2) left.
						OC unit transmission line for centralized control.			•	Less than 20V →	Confirm 3) left.
					3)	Disconnection or power source shut down of
Connecting
						power supply unit for transmission line.
					4)	Faulty system controller (MELANS).
	5 Remote		Remote	No reply	Same cause as that for plural refrigerant system.				Same countermeasure as that for plur-
(3)		controller	controller	(ACK) at RC					al refrigerant system.
		(RC)	(RC)	transmission
				to IC
			System	No reply	Trouble of partial IC units:				→ Same countermeasure as that for
			controller	(ACK) at	1) Same cause of that for single refrigerant system.					single refrigerant system.
			(SC)	RC
				transmis-	Trouble of all IC in one refrigerant system:				Confirm OC trouble diagnosis LED.
				sion to	1) Error detected by OC unit.				→ At trouble generation, check for the
				MELANS		Total capacity error.	(7100)			content according to check code.
						Capacity code setting error. (7101)
						Connecting number error.	(7102)
						Address setting error.	(7105)
					2)	Disconnection or short circuit of transmission line			Check the content of 2)~4) shown left.
						of OC unit terminal block for central control (TB7).

3)Power source shut down of OC unit.

4)Trouble of OC unit electrical system.

Trouble of all IC: Check the causes of 1) ~ 4) left.

1)As same that for single refrigerant system.

2)Insertion of power supply connector (CN40) into OC unit transmission line for central-ized control.

3)Disconnection or power shutdown of power supply unit for transmission line.

4)Faulty MELANS.

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