Heat Controller BHD-301-G Service Manual page 14

BHD-G Service Manual
6.3.5 Abnormal noise
6.3.6 Complaint and remedy
Complaint
No display or any button
failure.
Fan motor will not run.
Fan motor runs intermittently
Excessive noise
Stops instantly after startup.
Portable Dehumidifier with R-410A
Cause
Transformer (Discharge
transformer before
testing)
Display board or main
PCB failure.
No power
Power supply cord
Transformer (Discharge
transformer before
testing)
Wire disconnected or
connection loose
Main PCB failure
Capacitor (Discharge
capacitor before testing)
Will not rotate
Revolves on over load.
Copper tubing
Refrigerant
Compressor
Check whether the lines
are vibrating or coming
into contact with other
lines or compressor
Check whether the noise
is from inside the line.
Remedy
Check resistance between the two input/output lines on
transformer. Replace the transformer if either of the input/
output is open or the transformer is damaged.
Replace the display board if it is +5V or else replace the
main PCB.
Check voltage at electrical outlet. Correct if none.
Check voltage at the power cord terminal on Main PCB.
Replace the power cord if no voltage.
Check resistance between the two input/output lines on
transformer. Replace the transformer if either of the input/
output is open or the transformer is damaged.
Reconnect wire. Refer to wiring diagram for terminal
identification. Repair or replace loose terminal.
Select fan speed and check the voltage of P1, P2 on main
PCB. Replace the main PCB if no voltage.
Test capacitor. Replace if not within 10% of manufacturer's
rating. Replace if shorted, open or damaged.
Fan blade hitting shroud or blower hitting scroll. Realign
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
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.
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
compressor load too big. Recycle and recharge the
refrigerant after checking the charge amount.
The compressor overheated. Replace.
13
Heat Controller, Inc.