Heat Controller BHD-301-G Abnormal noise, Complaint and remedy, Portable Dehumidifier with R-410A

BHD-G Service Manual Portable Dehumidifier with R-410A Heat Controller, Inc.

6.3.5 Abnormal noise

Check whether the lines are vibrating or coming into contact with other lines or compressor

Check whether the noise is from inside the line.

6.3.6 Complaint and remedy

Complaint	Cause	Remedy
	Transformer (Discharge	Check resistance between the two input/output lines on
No display or any button	transformer before	transformer. Replace the transformer if either of the input/
	testing)	output is open or the transformer is damaged.
failure.
	Display board or main	Replace the display board if it is +5V or else replace the
	PCB failure.	main PCB.
	No power	Check voltage at electrical outlet. Correct if none.
	Power supply cord	Check voltage at the power cord terminal on Main PCB.
		Replace the power cord if no voltage.
	Transformer (Discharge	Check resistance between the two input/output lines on
	transformer before	transformer. Replace the transformer if either of the input/
	testing)	output is open or the transformer is damaged.
Fan motor will not run.	Wire disconnected or	Reconnect wire. Refer to wiring diagram for terminal
	connection loose	identification. Repair or replace loose terminal.
	Main PCB failure	Select fan speed and check the voltage of P1, P2 on main
		PCB. Replace the main PCB if no voltage.
	Capacitor (Discharge	Test capacitor. Replace if not within 10% of manufacturer’s
	capacitor before testing)	rating. Replace if shorted, open or damaged.
		Fan blade hitting shroud or blower hitting scroll. Realign
	Will not rotate	assembly. Check fan motor bearings. Replace the motor if
		motor shaft does not rotate.
		Check voltage. Call an electrician if not with in limits.
		Test capacitor. Replace if not within 10% of manufacturer’s
Fan motor runs intermittently	Revolves on over load.	rating. Replace if shorted, open or damaged.
		Check bearings. Replace the motor if the fan blade can’t
		rotate freely.
		Pay attention to any change from high speed to low speed.
		Replace the motor if the speed does not change.
Excessive noise	Copper tubing	Remove the cabinet and carefully rearrange tubing not to
		contact cabinet, compressor, shroud and/or barrier.
		The amount of the refrigerant is too much, making the
	Refrigerant	compressor load too big. Recycle and recharge the
Stops instantly after startup.		refrigerant after checking the charge amount.
	Compressor	The compressor overheated. Replace.

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