Mitsubishi Electronics P500YMF-C, PURY-P400 specifications 126

Checking	Meaning, detecting method			Cause		Checking method & Countermeasure
code
7102	Connected unit count over		2)	The Outdoor unit address is being		d) Check for the model total (capacity code total)
				set to 51~100 under automatic ad-		of indoor units connected.
				dress mode (Remote controller dis-
				plays “HO”).
			3)	Disconnection of transmission wir-
				ing at Outdoor unit.
			4)	Short circuit of transmission line in
				case of 3) & 4), remote controller
				displays “HO”.
			5)	Disconnection of transmission wir-
				ing at BC controller.
			6)	BC controller not for the BIG R2
				(model: FA, FB type) is connected.
7105	Address setting error		1)	Setting error of Outdoor unit ad-		Check that the address of OC unit is being set to
	• Erroneous setting of OC unit			dress.		51~100.
	address			The address of Outdoor unit is not		Reset the address if it stays out of the range, while
	• Erroneous setting of BC con-			being set to 51~100.		shutting the power source off.
	troller address		2)	The address of BC controller is not		When BC controller is out of the range, reset it while
				being set within 51~100.		shutting the power source of both OC unit and BC
		Trouble source :				controller off.
		Outdoor unit
		BC controller
7107	Branch No. setting error		1)	Indoor unit capacity per connector		a) Check indoor unit connection No. in refrigerant
	Can not operate because branch			joint is exceeded as follows:		circuit.
	No. of indoor unit wrongly set.			Single connection	:	1 No four or more indoor units which are set
				81 or more		for the same branch No. A?
		Trouble source :		Two connection joint	:	2 Check total capacity of indoor units which
		BC controller		161 or more		are set for the same branch No. Judged as
				Three connection joint	:	trouble when it applies to Cause 1).
				241 or more		3 Check whether the smallest branch No. is
				Four connection joint	:	set when used at joint.
				321 or more		b) Check whether indoor unit capacity code (SW2)
			2)	Four or more indoor units are set		is wrongly set. (Keep factory shipment condition.)
				for the same connection.		For erroneous switch setting, modify it, turn off
						the power source of outdoor unit, and indoor unit
			3)	The smallest branch No. has not		simultaneously for 5 minutes or more, and then
				been set when used at joint.		turn on.
			4)	Does the address of BC controller		C) Verify the address of BC controller (slave) and
				(slave) become the least address +		Indoor Unit.
				50 of Indoor controller connecting
				to BC controller (slave)?
			5)	The address of Indoor Unit, which
				is connected to BC controller
				(slave), sets up the small address
				from the greatest address of Indoor
				Unit which is connected to BC con-
				trol (master).
7111	Remote control sensor error		1)	In case when the old type remote		a) Replace the old remote controller by the new
	Error not providing the tempera-			controller for M-NET is used and the		remote controller.
	ture designed to remote control-			remote controller sensor is de-
	ler sensor.			signed on indoor unit. (SW1-1
				turned ON)
		Trouble source :
		Indoor unit
7130	Different Indoor model and BC		A indoor unit not for the R407C (model:			Use the P••• indoor unit.
	controller connected error		P••• ) is connected.

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