SERVICE MANUAL Portable Dehumidifer Series with R-410A: BHD-301-G BHD-501-G BHD-651-G Heat Controller, Inc. • 1900 Wellworth Ave. • Jackson, MI 49203 • (517)787-2100 • www.heatcontroller.
BHD-G Service Manual Portable Dehumidifier with R-410A Heat Controller, Inc. TABLE OF CONTENTS 1. PREFACE............................................................................................. 2 1.1 SAFETY PRECAUTIONS....................................................... 2 1.2 INSULATION RESISTANCE TEST......................................... 2 1.3 UNIT FEATURES.................................................................... 2 1.4 CONTROL LOCATIONS.............................................
Heat Controller, Inc. Portable Dehumidifier with R-410A BHD-G Service Manual 1. PREFACE This SERVICE MANUAL provides various servicing information for the unit, including the mechanical and electrical parts, etc. This dehumidifier was manufactured and assembled under a strict quality control system. The refrigerant is charged at the factory. Be sure to read the safety precautions prior to servicing the unit. 1.1 SAFETY PRECAUTIONS 1.
BHD-G Service Manual Portable Dehumidifier with R-410A Heat Controller, Inc. 3. Humidity Set Control The humidity level can be set within a range of 35%RH (Relative Humidity) to 85%RH (Relative Humidity) in 5% increments. For drier air, press the button and set to a lower percent value(%). When the value displays 35%,press the button again will activate the continuous dehumidifying operation. For damper air, press the button and set a higher percent value(%).
Heat Controller, Inc. Portable Dehumidifier with R-410A BHD-G Service Manual 2. Product Installation Instructions Install the portable dehumidifier in a flat and spacious location where the air outlets will not be obstructed. Do not install underneath desks or inside cupboards as this will restrict the air flow. Maintain a clearance of at least 8 inches (20cm) in the front and rear of the unit to maintain correct air-flow. 3.
BHD-G Service Manual Portable Dehumidifier with R-410A Heat Controller, Inc. 3.4 OPERATION WITH CONTINUOUS DRAINAGE On the rear of the unit, remove the rubber plug carefully. Remove the water tank first, then push the hose onto the connector located inside of the hole. The hose should go down smoothly without bends or kinks. Place the end of the hose into a suitable drainage location for condensate removal. 3.5 MAINTENANCE 3.5.1 Precaution Be sure to unplug the unit before cleaning.
Heat Controller, Inc. Portable Dehumidifier with R-410A BHD-G Service Manual 4.Electronic function 4.1 POWERING ON THE UNIT When the unit is just powered on or the dropped power is just restored, the unit will immediately perform the selfdiagnosis. The check items include the water-full, temperature sensor and humidity sensor. If there is no defect, the power LED will flash at 0.5Hz while all other LEDs are off. All buttons are invalid except the ON/OFF button. 4.
BHD-G Service Manual Portable Dehumidifier with R-410A Heat Controller, Inc. 5.Basic Test Procedures 5.1 DEFECTIVE COMPRESSOR Compressors are single phase, 115 volt. All compressor motors are permanent split capacitor type using only a running capacitor across the start and run terminal. All compressors are internally spring mounted and externally mounted on rubber isolators. COMPRESSOR WINDING TEST Remove compressor terminal box cover and disconnect wires from terminals.
Heat Controller, Inc. Portable Dehumidifier with R-410A BHD-G Service Manual TERMINAL OVERLOAD (Internal) Some model compressors are equipped with an internal overload. The overload is embedded in the motor windings to sense the winding temperature and/or current draw. The overload is connected in series with the common motor terminal. Should the internal temperature and/or current draw become excessive, the contacts in the overload will open, turning off the compressor.
BHD-G Service Manual Portable Dehumidifier with R-410A Heat Controller, Inc. 11. Break vacuum by charging system from the high side with the correct amount of refrigerant specified. This will prevent boiling the oil out of the crankcase. NOTE: If the entire charge will not enter the high side, allow the remainder to enter the low side in small increments while operating the unit. 12. Restart unit several times after allowing pressures to stabilize. Pinch off lines, cut and solder the ends.
Heat Controller, Inc. Portable Dehumidifier with R-410A BHD-G Service Manual CAPACITOR - TEST 1. Remove capacitor from unit. 2. Check for visual damage such as bulges, cracks, or leaks. 3. For dual rated, apply an ohmmeter lead to common (C) terminal and the other probe to the compressor (HERM) terminal. A satisfactory capacitor will cause a deflection on the pointer, then gradually move back to infinity. 4. Reverse the leads of the probe and momentarily touch the capacitor terminals.
Portable Dehumidifier with R-410A BHD-G Service Manual Heat Controller, Inc. 6. TROUBLESHOOTING GUIDE 6.1 TROUBLESHOOTING GUIDE In general, possible trouble is classified in three kinds. One is called Starting Failure which is caused from an electrical defect, another is ineffective Air Conditioning caused by a defect in the refrigeration circuit and improper application, and the other is called the Structure Damage.
Heat Controller, Inc. Portable Dehumidifier with R-410A 6.3.3 Humidity sensor check 6.3.
Portable Dehumidifier with R-410A BHD-G Service Manual 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 No display or any button failure. Fan motor will not run. Cause Remedy Transformer (Discharge transformer before testing) Check resistance between the two input/output lines on transformer.
Portable Dehumidifier with R-410A Heat Controller, Inc. Complaint Fan motor noise Compressor fan motor runs only Insufficient capacity 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 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. Voltage Check voltage.
BHD-G Service Manual Portable Dehumidifier with R-410A 7. Wiring Diagram 15 Heat Controller, Inc.
04/2009 05/2010
