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1. button is pressed again the unit will go into CONTINUOUS DEHUMIDIFICATION MODE The display on the unit will show CO In this mode the unit will maintain the room s humidity level at 35 as the standard setting The set humidity level can not be adjusted unless the button is pressed twice and CO is no longer displayed Within the continuous mode the compressor will cycle on and off as necessary automatically to maintain the 35 humidity level The fan will remain on with in NORMAL or TURBO mode as selected by the user or indicated by the light on the display The fan speed can be changed by the user to be in either TURBO or NORMAL modes however it never cycles off The fan will remain on in order to continuously sample the air s humidity remove air debris pollutants through the air filter and to provide better air circulation When the humidistat senses that the room s actual humidity is 5 higher than the set humidity of 35 in continuous mode the compressor will restart and begin to dehumidify the air until the set humidity level is achieved again This cycle will continue in order to maintain the humidity level of the air as desired by the set humidity level at 35 within the continuous mode 4 4 POWERING OFF THE UNIT The unit is stopped by pressing the ON OFF button the compressor and the fan will shut down and all indicator lights will turn off The time for defrost will be allotted When the unit is restarted by pressing2. 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 The deflection of the pointer should be two times that of the first check if the capacitor is good 5 Repeat steps 3 and 4 to check fan motor capacitor NOTE A shorted capacitor will indicate a low resistance and the pointer will move to the O end of the scale and remain there as long as the probes are connected An open capacitor will show no movement of the pointer when placed across the terminals of the capacitor 10 BHD G Service Manual Portable Dehumidifier with R 410A 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 electri cal defect another is ineffective Air Conditioning caused by a defect in the refrigeration circuit and improper applica tion and the other is called the Structure Damage ROOM AIRCONDITIONER VOLTAGE LIMITS NAMEPLATE RATING MINIMUM MAXIMUM 115V 103V 127V 6 2 IDENTIFY ALL POSSIBLE PCB FAULT CODES P1 Anti icing protection When the protection is activated the compressor will be off while the fan mo
3. 3 2 1 Plug the cord to the proper power recepticable The unit s program will run a self check if it is normal the power indicator flashes at 0 5Hz Press Power button now the unit will start operating under DEHUMIDIFYING mode with 60 setting humidity Press the Humidity or button will change humidity setting 3 2 2 Press Continuous button to start the continous dehumidification mode During this mode the Humidity or button are disabled 3 2 3 Press the Power button to turn off the unit You do not need to unplug the power cord except when the unit will not be in use for a long period of time 3 3 OPERATION WITH WATER TANK Water will drain into the tank When the tank is full the unit stops operating the water FULL indicator light will flash DO NOT remove the water tank while the machine is still working wait for the unit to completely stop to remove the bucket If not some water may drip To empty the water tank remove the tank as shown empty the water and replace the tank back in the unit Ensure components of water tank are correctly positioned The unit will re start when the water tank is restored to its correct position 1 Pull out the bucket a 2 Hold both sides of the 3 Pour the water out little bucket with even strength and pull it all the way out from the unit BHD G Service Manual Portable Dehumidifier with R 410A Heat Controller Inc 3 4 OPERATION WITH CONTINUOUS DRAINAGE On the rear of th
4. mm in mm in mm 13 28 340 19 88 505 9 96 253 15 47 393 24 49 622 12 64 321 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 16in 40cm or more amp Maintain a clearance of at least 8 inches 20cm in the front and rear of the unit to a Air outlet gnte maintain correct air flow Ac intaks girle 3 Product Operation 3 1 OPERATING CONDITIONS This unit is designed to operate in an environment between 41 F 90 F 5 C and 35 C If the unit has been switched off and needs to be switched on again quickly allow approximately three minutes for the compressor to start up and for dehumidifaction to resume Do not connect the dehumidifier to a multiple socket outlet which is also being used for other electrical appliances Select a suitable location making sure you have easy access to an electrical outlet Plug the unit into a 115V 60Hz electrical socket outlet with a ground connection Make sure the Water Tank is correctly inserted otherwise the unit will not operate properly bb 8in 20cm or 8in 20cm or mores more ee ee Ag I ik Stem UL 8in 20cm or more 3 2 TURNING THE UNIT ON OR OFF
5. pressure connected with the high pressure The refrigerating system is difficult to produce high pressure and low pressure Replace the compressor after checking for the failure Compressor Check and replace if the Humidity sensor if open or damaged 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 Humidity sensor Check and replace if the Humidity sensor if open or damaged Main PCB Check and replace the main PCB The compressor does not stop even if the room humidity has reached the set RH Humidity sensor 14 The unit starts and stops frequently BHD G Service Manual Portable Dehumidifier with R 410A Heat Controller Inc 7 Wiring Diagram DISPLAY BOARD CN13 AC a PaPa MAIN BOARD J gjf CNS i 15 Design material performance data and components subject to change without notice HEAT CONTROLLER INC 1900 Wellworth Ave Jackson MI 49203 Ph 517 787 2100 Fax 517 787 9341 THE QUALITY LEADER IN CONDITIONING AIR www heatcontroller com 05 2010
6. the ON OFF button the unit will start with previous set mode and fan speed The defrost function begin The self diagnosis function will check if the water bucket is full The fan motor will turn on with the compressor 4 5 COMPRESSOR PROTECTION The compressor has a 3 minute time delay before it will restart if the unit was turned off 4 6 PROTECTION AND FAILURE MODE 4 6 1 Water full protection When the water tank is full the compressor and fan motor will shut down and the water full indicator will flash with LED displaying P2 Under this situation all button will not operate After the water is removed from the bucket the unit will restore operating at the previous setting 4 6 2 Anti icing protection 4 6 2 1 If after 15 minutes the compressor is operating and the temperature of the evaporator is lower than 30 F 1 C the Anti icing protection function will be activated 4 6 2 2 When the protection is activated the compressor will turn off while the fan motor turns on at high fan speed and the Turbo indicator will be on with the LED displaying P1 The time will also be cleared 4 6 2 3 After the compressor has remained off and the fan has stayed on high fan speed for 6 minutes then the unit will stop anti icing protection function 4 6 2 4 If the temperature sensor has failed the time will be cleared from the display If the water full error has occurred the time will just stop but not be cleared from the display 4 6 2 5 After the Anti ic
7. HEAT CONTROLLER INC SERVICE MANUAL AS ANS a aN aN N oh aN e as Portable Dehumidifer Series with R 410A BHD 301 G BHD 501 G BHD 651 G Heat Controller Inc e 1900 Wellworth Ave Jackson MI 49203 517 797 2100 www heatcontroller com BHD G Service Manual Portable Dehumidifier with R 410A TABLE OF CONTENTS PREFACE aci i iu UED cs atr AGO I CA 1 1 SAFETY PRECAUTIONS sian 1 ii RY FU RR YN Na 1 2 INSULATION RESISTANCE TEST LG UNIT FEATURES ioen 1 4 CONTROL LOCATION DY WN NN 1 5 OUTSIDE DIMENSIONS occ cece Ye FLY eeneeeees 2 Product Installation Instructions 3 Product OperatiOf i eiii es uii Nu ina dnn Ganu YR dn Una dan duu ad 3 Operating CondlIonSs Gn 3 2 Turning the unit ON or OFF e e eiu uuuiuuu 3 3 Operation with Water Tank ccccecceeeseeeeeeneeeeees 3 4 Operation with Continuous drainage 3 0 MAINTENANG ueb GR Al RL FAB GO 4 Electronic function e Yny Yy YY yL nnLnynnnnnu 4 1 Powering on the unit ccccccceeceeeceeceeeceeseeeeeeees 4 2 Setting the relative humidity ee iiu iieuuuu 4 3 Continuous Dehumidification mod eee 4 4 Powering off the unit 9eeeui eer i ui suuenu 4 5 Compressor protection cccceccseeceeeeeeceeeeseeeeeeeeees 4 6 Protection and failure MOE 9 eee iu
8. agnosis 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 2 SETTING THE RELATIVE HUMIDITY When the ON OFF button is pressed for the first time after the unit has been off or has experienced a power fail ure the unit will operate according to the original factory setting humidity of 60 RH The humidity setting can be changed by pressing the or buttons Under normal operation when the indoor humidity is 5 higher than the set humidity the compressor will turn on the fan speed with be low with the NORMAL light on When the indoor humidity becomes lower than the set humidity the compressor will turn off but the fan will remain on in order to continuously sample the air s humidity remove air debris pollutants through the air filter and to provide better air circulation When the humidistat senses that the room s actual humidity is 5 higher that the set humidity the com pressor will restart and begin to dehumidify the air until the set humidity level is achieved This cycle will continue in order to maintain the humidity level of the air as desired by the set humidity level The only exception to this opera tion cycle is outlined below when the unit is placed into continuous mode by the user 4 3 CONTINUOUS DEHUMIDIFICATION MODE When the set humidity level is at 35 and the
9. arm When the line temperature sensor is defective the motors of the compressor and the fan will shut down and the power indicator will flash at 5 Hz 11 Heat Controller Inc Portable Dehumidifier with R 410A BHD G Service Manual Power indicator flashes at5 Hz Connection between temp sensor and PUB is loose Place it properly Replace pipe temperature sensor H Fipe temperature sensor failure 6 3 3 Humidity sensor check Humidity display failed Water on the Humidity sensor hoard H Allow it to dry H um idity sensor hoard failure or main PCB detective Replace humidity sensor hoard or main PEB 6 3 4 Fail to start or fail to start motor Failto start Failto start motor Press the POWER button then yes When turning the poweron No the fan button on the Control Is there a beep sound from panel Do the lamps light the unit Yes No Check wiring Replace the display board Check the power cord t Check the transformer i Replace the fuse on main PCB Check circuit breaker and fuse Check the voltage between motor termi nates on main PCB and N on power cord If any one of them has no voltage t 12 BHD G Service Manual Portable Dehumidifier with R 410A Heat Controller Inc 6 3 5 Abnormal noise Abnormal noise ICheck whether the lines Check whether the air out are vibrating or coming frame i
10. ccurate refrigerant charge measuring device such as a Balance Scales 1 2 oz accuracy b Charging Board 1 2 oz accuracy 9 High Pressure Gauge 0 400 Ibs 10 Low Pressure Gauge 30 150 Ibs 11 Vacuum Gauge 0 1000 microns EQUIPMENT MUST BE CAPABLE OF 1 Recovery CFC s as low as 5 2 Evacuation from both the high side and low side of the system simultaneously 3 Introducing refrigerant charge into high side of the system 4 Accurately weighing the refrigerant charge actually introduced into the system 5 Facilities for flowing nitrogen through refrigeration tubing during all brazing processes HERMETIC COMPONENT REPLACEMENT The following procedure applies when replacing components in the sealed refrigeration circuit or repairing refrigerant leaks Compressor condenser evaporator capillary tube refrigerant leaks etc 1 Recover the refrigerant from the system on the high side of the system by installing a line tap on the line Apply gauge from line to EPA approved gauges from line to EPA approved recovery system Recover CFCs in system to at least 5 2 Cut the line below pinch off the suction side of the compressor 3 Connect the line from the nitrogen tank to the suction line 4 Add dry nitrogen through the system and unsolder the more distant connection first Filter drier high side process tube etc 5 Replace inoperative component and always install a new filter drier Add dry nitrogen through the sy
11. citor before testing rating Replace if shorted open or damaged No display or any button failure 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 rating Replace if shorted open or damaged Fan motor runs intermittently Revolves on over load 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 l l Remove the cabinet and carefully rearrange tubing not to Excessive noise Copper tubing 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 13 Heat Controller Inc Portable Dehumidifier with R 410A BHD G Service Manual Ean Replace the fan if cracked out of balance or partially missing Replace the blower if cracked out of balance or partially Blower ae missing Loose screws Tighten them Replace the motor if knocking sounds continues when Fan motor noise Worn bearings running or if the motor hums or
12. e 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 gt Drain hose Remove the rubber plug os Push the hose into the drain hole Connector 3 5 MAINTENANCE 3 9 1 Precaution Be sure to unplug the unit before cleaning Do not use harsh detergents thinners or other chemical agents to clean the unit as this may damage the unit Do not wash the unit directly under a tap or hose The electrical components inside may be damaged and the unit become unsafe as a result 3 5 2 Air filter Clean the air filter at least once every two weeks to prevent impaired performance of the unit Pull the air filter out and Wash the air filter with clean water and then carefully dry see figure below 3 5 3 Unit enclosure Use a soft clean cloth to wipe the surface Do not use water as this may cause an electrical fault or shock hazard 3 5 4 Water tank Wash the tank using warm water 104 F about 40 C with neutral detergent Rinse and allow to air dry Replace tank when dry 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 self di
13. equent cycling 4 Dirty condenser TERMINAL OVERLOAD TEST Compressor External Type 1 Remove overload 2 Allow time for overload to reset before attempting to test 3 Apply ohmmeter probes to terminals on overload wires There should be continuity through the overload 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 The overload will automatically reset but may require several hours before the heat is dissipated LINE BREAK INTERNAL OVERLOAD CHECKING THE INTERNAL OVERLOAD 1 With no power to unit remove the leads from the compressor terminals 2 Using an ohmmeter test continuity between terminals C S and C R If not continuous the compressor overload is open and the compressor must be replaced OHMMETER 5 2 SEALED REFRIGERATION SYSTEM REPAIRS EQUIPMENT REQUIRED 1 Voltmeter 2 Ammeter 3 Ohmmeter 4 E P A Approved Refrigerant Recovery System 5 Vacuum Pump capable of 200 microns or less vacuum 6 Acetylene Welder 7 Electronic Halogen Leak Detector G E Type H 6 or equivalent 8 A
14. i uu nuund 5 Basic Test PrOcediur6 S iii NW aan GN ng 5 1 Defective Compressor eei iu YY YL YL FF Li Fuuiu 5 2 SEALED REFRIGERATION SYSTEM REPAIRS Sed SN O LLON n FF Y O WN oe y 2 oy EURO 5 eee IYv Y 6 TROUBLESHOOTING GUIDE ccc csecessesseceseseeseseeeaees 6 1 TROUBLESHOOTING GUIDE 62 Faut Codes tata FSA totes 6 3 TROUBLE SHOO ING cu i RD Gau AG te WIRING DIAGRAM ce ieu CU a OG iyn DE Gn NL NG RR Heat Controller Inc 4 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 When servicing the unit set the POWER SWITCH to OFF and UNPLUG the POWER CORD 2 Inspect the service cord for damage or wear If a short circuit is found replace all parts which have been overheated or damaged by the short circuit 3 After servicing the unit conduct an insulation resistance test to protect the user from being exposed to electrical shock hazards 1 2 INSULATION RESISTANCE TEST 1 Unplug the power cord and connect a jumper lead between the two 2 live test pins 2 The g
15. 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 TIMER Set Control Use the or buttons to set the Auto start and Auto stop time from 0 0 to 24 hours 4 Fan speed Control the fan speed By pressing either High or Normal fan speed Set the fan control to High for maximum mois ture removal When the humidity has been reduced and quieter operation is preferred set the fan control to Normal 5 TIMER Press to initiate the Auto start and Auto stop feature in conjuction with the and amp keys 6 Display Shows the set humidity level from 35 to 85 or auto start stop time 0 24 hours while setting then shows the actual 5 accuracy room humidity level in a range of 30 RH Relative Humidity to 9O RH Relative humidity Error Codes AS Humidity sensor error Unplug the unit and plug it back in If error repeats call for service ES Temperature sensor error Unplug the unit and plug it back in If error repeats call for service P1 Unit is defrosting Allow the unit time to automatically defrost The error will clear after the unit self defrosts P2 Bucket is full Empty the bucket and replace in the right position CO Continuous dehumidifying mode is selected 1 5 OUTSIDE DIMENSIONS Width Height Depth in
16. ing function is complete the unit will restore operation from the previous mode 4 6 3 Sensor failure check When the output voltage of sensor is lower than 0 5V or higher than 4 95V the unit will alarm and the LED displays E1 for humidity sensor failure and E2 for temperature sensor failure Under this situation the compressor and the fan motor will shut down and the Power indicator will flash at 5Hz After the defect is cleared the unit will not work until the power to the unit is re stored 4 6 4 When the water full and sensor failure occur together the water full alarm has the priority on display 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 Using an ohmmeter check continuity across the following 1 Terminal C and S no continuity open winding replace compressor 2 Terminal C and R no continuity open winding replace compressor 3 Terminal R and S no continuity open winding replace compressor Figure 1 Compressor winding test GROUND TEST Use an oh
17. mmeter set on its highest scale Touch one lead to the compressor body clean point of contact as a good connection is a must and the other probe in turn to each compressor terminal see Figure 2 If a reading is obtained the compressor is grounded and must be replaced CHECKING COMPRESSOR EFFICIENCY The reason for compressor inefficiency is normally due to broken or damaged suction and or discharge valves reducing the ability of the compressor to pump refrigerant gas This condition can be checked as follows 1 Install a piercing valve on the suction and discharge or liquid line 2 Attach gauges to the high and low sides of the system 3 Start the system and run a cooling or heating performance test If test shows A Below normal high side pressure B Above normal low side pressure Figure 2 Typical ground test C Low temperature difference across coil The compressor valves are faulty replace the compressor THERMAL OVERLOAD External Some compressors are equipped with an external overload which is located in the compressor terminal box adjacent to the compressor body The overload is wired in series with the common motor terminal The overload senses both amperage and compressor temperature High motor temperature or amperage heats the disc causing it to open and break the circuit to the common motor terminal Heat generated within the compressor shell is usually due to 1 High amperage 2 Low refrigerant charge 3 Fr
18. 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 the terminal If wires are off refer to wiring diagram for identification and replace Check wire locations If not per wiring diagram correct 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 Check the compressor for open circuit or ground If open or Compressor grounded replace the compressor Air filter Clean if restricted Condenser and Clean if restricted Evaporator Check the fan capacitor and replace if not within 10 of manufacturer s rating Ensure that the room the unit is operating in is sealed well Room structure Close any open doors or windows Wiring Compressor fan motor runs only Fan motor Insufficient capacity Clean or remove any barrier that blocks the inlet outlet air Air flow l flow of the unit Check the lines for leakage Recycle the refrigerant correct Less refrigerant 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
19. rounding conductor yellow green should be open 3 Measure the resistance value with an ohm meter between the jumped lead and each exposed metallic part on the unit at all the positions except OFF on the ROTARY SWITCH or POWER SWITCH 4 The value should be over 1MQ 1 3 UNIT FEATURES e Auto defrosting e Suitable for low temperature and high humidity weather e Water full alarm and auto shutdown functions e Powerful dehumidification in wide temperature range between 41 F 90 F 5 C 32 C e LED display e Humidity display and setting e Self diagnose and defect display 1 4 CONTROL LOCATIONS Continuous High fan rower an Check fiter Bucket fu P Fndicakt Timer orot imdkeater ight indicator hight ncicalor lige ighi t incicake Fghl ndicater light CONTINUE TURBO TINER o Ao O OFF Control pads When you push the button to change operation modes the unit will make a beep sound to indicate that it is chang ing modes 1 POWER Press to turn the dehumidifier on and off 2 CHECK FILTER The check filter feature is a reminder to clean the Air Filter for more efficient operation The LED light will illuminate after 250 hours of operation To reset after cleaning the filter press CHECK FILTER and the light will go off 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
20. s vibrating into contact with other lines or compressor Check whether the fan is l blocked Rechar uir py 1Yes Check whether the noise Recharge refrigerant 2 2 is from inside the line No Check the rubber isolator under the compressor L EE Replace the compressor Replace the motor Replace the capillary tube 6 3 6 Complaint and remedy 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 Display board or main Replace the display board if it is 5V or else replace the PCB failure main PCB Check voltage at electrical outlet Correct if none Check voltage at the power cord terminal on Main PCB Power supply cord 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 l Select fan speed and check the voltage of P1 P2 on main MR FETIO PCB Replace the main PCB if no voltage Capacitor Discharge Test capacitor Replace if not within 10 of manufacturer s capa
21. single phase permanent split capacitor motor is used to drive the evaporator blower and condenser fan A self resetting overload is located inside the motor to protect against high temperature and high amperage conditions FAN MOTOR TEST 1 Determine that capacitor is serviceable 2 Disconnect fan motor wires from fan speed switch or system switch 3 Apply live test cord probes on black wire and common terminal of capacitor Motor should run at high speed 4 Apply live test cord probes on red wire and common terminal of capacitor Motor should run at low speed 5 Apply live test cord probes on each of the remaining wires from the speed switch or system switch to test intermediate speeds 5 4 CAPACITOR A run capacitor is wired across the auxiliary and main winding of a single phase permanent split capacitor motor such as the compressor and fan motor A single capacitor can be used for each motor or a dual rated capacitor can be used for both The capacitor s primary function is to reduce the line current while greatly improving the torgue characteristics of a motor The capacitor also reduces the line current to the motor by improving the power factor of the load Run capacitor hook up line side of the capacitor is marked with a red dot and is wired to the line side of the circuit FAN MOTOR Heat Controller Inc Portable Dehumidifier with R 410A BHD G Service Manual CAPACITOR TEST 1 Remove capacitor from unit
22. stem when making these connections 6 Pressurize system to 30 PSIG with proper refrigerant and boost refrigerant pressure to 150 PSIG with dry nitrogen 7 Leak test complete system with electric halogen leak detector correcting any leaks found 8 Reduce the system to zero gauge pressure 9 Connect vacuum pump to high side and low side of system with deep vacuum hoses or copper tubing Do not use regular hoses 10 Evacuate system to maximum absolute holding pressure of 200 microns or less NOTE This process can be sped up by use of heat lamps or by breaking the vacuum with refrigerant or dry nitrogen at 5 000 microns Pressure system to 5 PSIG and leave in system a minimum of 10 minutes Recover refrigerant and proceed with evacuation of a pressure of 200 microns or a minimum of 10 8 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 Remove pinch off tool and leak check the line ends COMPRESSOR MOTOR BURNOUT 1 Recover all refrigerant and oil from the system 2 Remove compressor capillary
23. tor is on with high speed and the Turbo indicator will be on with the LED displaying P1 After the Anti icing function is completed the unit will restore operation in the previous mode P2 Water full protection When the water tank is full the compressor and fan motor will shut down and the water full indicator will flash with LED displaying P2 Under this situation all buttons are deactivated After the water is removed the unit will restore operating at the previous setting E1 Humidity sensor failure When the output voltage of sensor is lower than 0 5V or higher than 4 95V the unit will alarm and the LED displays E1 After the defect is cleared the unit will not work until the power to the unit is re stored E2 Temperature sensor failure When the output voltage of sensor is lower than 0 5V or higher than 4 95V the unit will alarm and the LED displays E2 After the defect is cleared the unit will not work until the power to the unit is re stored 6 3 TROUBLE SHOOTING 6 3 1 Water level protection function abnormal Abnormal water level protection function includes the following 1 There is an alarm when the water level is normal and 2 There is no alarm for full water Check whether the water i Check whetherthe water tank is placed properly I F a ia SENnSor No Check the wiring of the water depth sensor sensor I T T Replace the main PCE Replace the main PCE 6 3 2 Automatic trouble al
24. tube and filter drier from the system 3 Flush evaporator condenser and all connecting tubing with dry nitrogen or equivalent to remove all contamination from system Inspect suction and discharge line for carbon deposits Remove and clean if necessary 4 Reassemble the system including new drier strainer and capillary tube 9 Proceed with processing as outlined under hermetic component replacement ROTARY COMPRESSOR TROUBLESHOOTING AND SERVICE Basically troubleshooting and servicing rotary compressors is the same as a reciprocating compressor with a few exceptions 1 Because of the spinning motion of the rotary compressor the mounts are critical If vibration is present check the mounts carefully 2 The electrical terminals on the rotary compressor are in a different order than the reciprocating compressors The terminal markings are on the cover gasket Use the wiring diagram to insure correct connections REFRIGERANT CHARGE 1 The refrigerant charge is extremely critical Measure charge carefully as exact as possible to the nameplate charge 2 The correct method for charging the rotary compressor is to introduce liguid refrigerant into the high side of the system with the unit off Then start compressor and add the balance of the charge gas only into the low side The introduction of liguid into the low side without the use of a capillary tube will cause damage to the discharge valve of the rotary compressor 5 3 FAN MOTOR A
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