Mitsubishi Electronics PUHY-YMC The following phenomena do not represent abnormality emergency

12.5. The following phenomena do not represent abnormality (emergency)

	Phenomenon	Display of remote controller	Cause
	Indoor unit does not the perform cool-	“Cooling (heating)” flashes	When another indoor unit is performing the heating (cooling) opera-
	ing (heating) operation.		tion, the cooling (heating) operation is not performed.
	The auto vane runs freely.	Normal display	Because of the control operation of auto vane, it may change over to
			horizontal blow automatically from the downward blow in cooling in case
			the downward blow operation has been continued for 1 hour. At de-
			frosting in heating, hot adjusting and thermostat OFF, it automatically
			changes over to horizontal blow.
	Fan setting changes during heating.	Normal display	Ultra-low speed operation is commenced at thermostat OFF.
			Light air automatically changes over to set value by time or piping tem-
			perature at thermostat ON.
	Fan stops during heating operation.	Defrost display	The fan is to stop during defrosting.
	Fan does not stop while operation has	No lighting	Fan is to run for 1 minute after stopping to exhaust residual heat (only
	been stopped.		in heating).
	No setting of fan while start SW has	Heat ready	Ultra low-speed operation for 5 minutes after SW ON or until piping
	been turned on.		temperature becomes 35°C, low speed operation for 2 minutes there-
			after, and then set notch is commenced. (Hot adjust control)
	Outdoor unit does not operate by turn-	Normal display	When the outdoor unit is being cooled and the refrigerant is resting,
ENGLISH	ing switch on.		warming up operation is performed for at least 35 minutes to warm the
			compressor.
			During this time, only the fan operates.
	Indoor unit remote controller shows	“HO” flashes	System is being driven.
	“HO” indicator for about two minutes		Operate remote controller again after “HO” disappear.
	when turning ON universal power sup-
	ply.
	Drain pump does not stop while unit has	Light out	After a stop of cooling operation, unit continues to operate drain pump
	been stopped.		for three minutes and then stops it.
	Drain pump continues to operate while		Unit continues to operate drain pump if drainage is generated, even
	unit has been stopped.		during a stop.
	When the variable capacity unit is run-	Normal display	The fan of constant capacity unit is run automatically in order not to
	ning, the fan of the constant capacity		accumulate the refrigerant.
	unit runs even though the constant ca-
	pacity unit isn’t running.

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