Method, Forwiring, Checking | Mitsubishi Electronics P500YMF-C

3) Checking and measures to be taken

(a)Measures against noise

Check the items below when noise can be confirmed on wave shape or the error code in the item 1) is generated.

	Items to be checked		Measures to be taken

	1 Wiring of transmission and power lines in	Isolate transmission line from power line (5cm or more).
	crossing.	Never put them in the same conduit.

method	2 Wiring of transmission line with that of other	Wire transmission line isolating from other transmission line.
	system in bundle.	Wiring in bundle may cause erroneous operation like crosstalk.

	3 Use of shield wire for transmission line (for	Use specified transmission wire.
forwiring	both indoor unit control and centralized	Type	:	Shield line CVVS/CPEVS
	control).	Wire diameter	:	1.25mm2 or more

	4 The shield is to be daisy changed exactly the	The transmission line is wired with 2-jumper system. Wire the shield
Checking	4 The shield is to be daisy changed exactly the
	same as the transmission line.	with jumper system as same for transmission line.
		When the jumper wiring is not applied to the shield, the effect against
		noise will be reduced.

	5 Are the units and transmission lines grounded	Connect to ground as shown in the INSTALLATION MANUAL.
	as instructed in the INSTALLATION MANUAL?

	6 Earthing of the shield of transmission line (for	One point earthing should be made at outdoor unit.
	indoor unit control) to outdoor unit.	Without earthing, transmission signal may be changed as the noise on
		the transmission line has no way to escape.

	7 Arrangement for the shield of transmission line	For the shield earth of the transmission line for centralized control, the
	(for centralized control).	effect of noise can be minimized if it is from one of the outdoor units in
		case of the group operation with different refrigerant systems, and from
		the upper rank controller in case the upper rank controller is used.
earthing		However, the environment against noise such as the distance of trans-
		mission line, the number of connecting sets, the type of connecting con-
		troller, and the place of installation, is different for the wiring for central-
		ized control. Therefore, the state of the work should be checked as fol-
for
for		lows.
Check		a) No earthing
		• Group operation with different refrigerant systems
		One point earthing at outdoor unit
		• Upper rank controller is used
		Earthing at the upper rank controller
		b) Error is generated even though one point earth is being con-
		nected.
		Earth shield at all outdoor units.
		Connect to ground as shown in the user’s manual.

(b)When the wave height value of transmission wave shape is low, 6607 error is generated, or remote controller is under the state of “HO.”

Items to be checked	Measures to be taken

8 The farthest distance of transmission line is	Confirm that the farthest distance from outdoor unit to indoor unit/
exceeding 200m.	remote controller is less than 200m.

9 The types of transmission lines are different.	Use the transmission wire specified.
	Type of transmission line	:	Shield wire CVVS/CPEVS
	Wire dia. of transmission line	:	1.25mm2 or more

0 No transmission power (30V) is being supplied	Refer to “Transmission Power Supply (30V) Circuit Check Procedure.”
to the idoor unit or the remote control.

A Faulty indoor unit/remote controller.	Replace outdoor unit circuit board or remote controller.

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PURY-P400, P500YMF-C specifications

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Mitsubishi Electronics P500YMF-C, PURY-P400 specifications Method, Forwiring, Checking, Earthing

Models: PURY-P400 P500YMF-C

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PURY-P400, P500YMF-C specifications