User Guide

Heat Controller, Inc. Portable Dehumidier with R-410A BHD-G Service Manual
14
Complaint Cause Remedy
Fan motor noise
Fan
Replace the fan if cracked, out of balance, or partially
missing.
Blower
Replace the blower if cracked, out of balance, or partially
missing.
Loose screws Tighten them.
Worn bearings
Replace the motor if knocking sounds continues when
running, or if the motor hums or noise appears to be internal
while running.
Compressor fan motor runs
only
Voltage Check voltage. Call an electrician if not within limits.
Wiring
Check the wire connections, if loose, repair or replace
the terminal. If wires are off, refer to wiring diagram for
identication, and replace. Check wire locations. If not per
wiring diagram, correct.
Main PCB failure Replace the main PCB.
Capacitor (Discharge
capacitor before testing)
Check the capacitor. Replace if not within 10% of
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.
Insufcient capacity
Air lter Clean if restricted.
Condenser and
Evaporator
Clean if restricted.
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.
Air ow
Clean or remove any barrier that blocks the inlet/outlet air
ow of the unit.
Less refrigerant
Check the lines for leakage. Recycle the refrigerant, correct
the leakage points and recharge.
Capillary tube
Regulate the ow of capillary tube and make the evaporating
temperature appropriate if the evaporator is frosted.
Compressor
The inlet and outlet valve of the compressor is damaged,
making the low pressure connected with the high pressure.
The refrigerating system is difcult to produce high pressure
and low pressure. Replace the compressor after checking
for the failure.
The compressor does not stop
even if the room humidity has
reached the set RH%.
Humidity sensor
Check and replace if the Humidity sensor, if open or
damaged.
Main PCB Check and replace the main PCB
The unit starts and stops
frequently.
Power supply
The input power supply voltage is too low. Call an electrician
if not within limits.
Humidity sensor
Check and replace if the Humidity sensor, if open or
damaged.
Main PCB Check and replace the main PCB.