Heat Controller BHD-501-G, BHD-651-G Portable Dehumidifier with R-410A Complaint Cause Remedy

Heat Controller, Inc.	Portable Dehumidifier with R-410A		BHD-G Service Manual
Complaint	Cause	Remedy
	Fan	Replace the fan if cracked, out of balance, or partially
		missing.
	Blower	Replace the blower if cracked, out of balance, or partially
Fan motor noise		missing.
	Loose screws	Tighten them.
		Replace the motor if knocking sounds continues when
	Worn bearings	running, or if the motor hums or noise appears to be internal
		while running.
	Voltage	Check voltage. Call an electrician if not within limits.
		Check the wire connections, if loose, repair or replace
	Wiring	the terminal. If wires are off, refer to wiring diagram for
		identification, and replace. Check wire locations. If not per
Compressor fan motor runs
		wiring diagram, correct.
only
	Main PCB failure	Replace the main PCB.
	Capacitor (Discharge	Check the capacitor. Replace if not within 10% of
	capacitor before testing)	manufacturer’s rating. Replace if shorted, open, or damaged.
	Humidity sensor	Replace if shorted, open, or damaged.
	Compressor	Check the compressor for open circuit or ground. If open or
		grounded, replace the compressor.
	Air filter	Clean if restricted.
	Condenser and	Clean if restricted.
	Evaporator
	Fan motor	Check the fan capacitor and replace if not within 10% of
		manufacturer’s rating.
	Room structure	Ensure that the room the unit is operating in is sealed well.
		Close any open doors or windows.
Insufficient capacity	Air flow	Clean or remove any barrier that blocks the inlet/outlet air
		flow of the unit.
	Less refrigerant	Check the lines for leakage. Recycle the refrigerant, correct
		the leakage points and recharge.
	Capillary tube	Regulate the flow of capillary tube and make the evaporating
		temperature appropriate if the evaporator is frosted.
		The inlet and outlet valve of the compressor is damaged,
		making the low pressure connected with the high pressure.
	Compressor	The refrigerating system is difficult to produce high pressure
		and low pressure. Replace the compressor after checking
		for the failure.
The compressor does not stop	Humidity sensor	Check and replace if the Humidity sensor, if open or
even if the room humidity has		damaged.
reached the set RH%.
	Main PCB	Check and replace the main PCB
	Power supply	The input power supply voltage is too low. Call an electrician
		if not within limits.
The unit starts and stops
	Humidity sensor	Check and replace if the Humidity sensor, if open or
frequently.		damaged.
	Main PCB	Check and replace the main PCB.

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