Heat Controller BHD-301-D, BHD-651-D, BHD-501-D User Manual

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HEAT CONTROLLER, INC.

Dehumidifier

MODELS: BHD-301-D

BHD-501-D

BHD-651-D

Service Manual

CAUTION

-Before servicing the unit, read the "safety precautions" in this manual. -Only for authorized service personnel.

CONTENTS

 

1. PREFACE

 

1.1 SAFETY PRECAUTIONS...........................................................................................................................

3

1.2 FEATURES AND DIMENSIONS ................................................................................................................

3

1.2.1 FEATURES........................................................................................................................................

3

1.2.2 DIMENSIONS ....................................................................................................................................

3

1.3 SPECIFICATIONS......................................................................................................................................

4

1.4 CONTROL TYPE........................................................................................................................................

5

1.4.1 MECHANICAL TYPE.........................................................................................................................

5

1.4.2 ELECTRONIC TYPE .........................................................................................................................

5

1.5 HOW TO OPERATE DEHUMIDIFIER........................................................................................................

6

1.5.1 HOW DOES THE DEHUMIDIFIER WORK? .....................................................................................

6

1.5.2 LOCATION FOR THE DEHUMIDIFIER.............................................................................................

6

1.5.3 MICRO SWITCH................................................................................................................................

6

1.5.4 AUTO DEFROST...............................................................................................................................

6

1.5.5 HUMIDITY CONTROLLER................................................................................................................

7

2. CIRCUIT DIAGRAM............................................................................................................................

8

3. DISASSEMBLY INSTRUCTIONS

 

3.1 MECHANICAL PARTS .............................................................................................................................

10

3.1.1 BUCKET AND AIR FILTER .............................................................................................................

10

3.1.2 FRONT CASE AND TOP COVER...................................................................................................

10

3.1.3 CABINET AND CONTROL BOX .....................................................................................................

10

3.2 CONTROL PARTS ..................................................................................................................................

11

3.2.1 POWER CORD ASSEMBLY ...........................................................................................................

11

3.2.2 SENSOR ASSEMBLY .....................................................................................................................

11

3.2.3 PWB(PCB) ASSEMBLY, MAIN .......................................................................................................

11

3.2.4 CAPACITOR....................................................................................................................................

11

3.2.5 MICRO SWITCH ASSEMBLY .........................................................................................................

11

3.2.6 CONTROL PANEL ..........................................................................................................................

12

3.2.7 FAN AND MOTOR...........................................................................................................................

13

3.2.8 DRAIN PAN .....................................................................................................................................

13

3.3 REFRIGERATING CYCLE .......................................................................................................................

14

3.3.1 CONDENSER, EVAPORATOR AND CAPILLARY TUBE...............................................................

14

3.3.2 ROTARY COMPRESSOR ..............................................................................................................

14

3.4 HOW TO REPLACE REFRIGERATION SYSTEM...................................................................................

15

4. TROUBLESHOOTING GUIDE...................................................................................................

17

5. EXPLODED VIEWS..........................................................................................................................

19

6. REPLACEMENT PARTS LIST...................................................................................................

22

—2—

1. PREFACE

This Service Manual provides various service information, including the mechanical and electrical parts. This dehumidifier was manufactured and assembled under the strict quality control procedures.

The refrigerant is charged at the factory. Be sure to read the safety precaution prior to servicing the unit.

1.1 SAFETY PRECAUTIONS

Disconnect the power supply before servicing or replacing any component.

Do not cut off the grounding prong or alter the plug in any manner.

1.2 FEATURES AND DIMENSIONS

1.2.1 FEATURES

Quiet operation

High efficiency

Adjustable humidistat

Automatic defrost

Automatic shut-off

Bucket-full indicator light

Easy roll casters

Removable & large capacity bucket.

Washable air filter

Two-speed fan

Drain hose connection.

Low temperature operation (BHD-501-D/BHD-651-D)

1.2.2 DIMENSIONS (mm/in)

385 (15 5/32)

340 (13 3/8)

)

4

/

540 (21 1

Figure 1

—3—

1.3 SPECIFICATIONS

MODELS

BHD-301-D

BHD-501-D

BHD-651-D

ITEMS

 

 

 

 

 

CAPACITY(Pints/24hrs)

 

30

50

65

POWER SUPPLY(Phase,V,Hz)

 

 

1Ø, 115V,60Hz

 

INPUT(W)

 

490

615

710

RUNNING CURRENT(A)

 

4.8

5.9

7.0

ENERGY FACTOR(L/kw.h)

 

1.2

1.6

1.80

REFRIGERANT

 

 

R22

 

REFRIGERANT CHARGE, oz(g)

 

5.29(150)

7.23(205)

8.82(250)

THERMISTOR

OPEN

 

33.8˚F(1±0.5°C)

 

 

CLOSE

 

50˚F(10±0.5°C)

 

SOLENOID VALVE

 

 

Using Temp/Humid.:-4~122˚F(-20~50°C)/95%RH

 

 

 

Rating:7W/90mA

COMPRESSOR MODEL No.

 

SD063SW

YZG-A17D2T2

QA114CBG

PROTECTOR

 

OVERLOAD PROTECTOR FOR COMPRESSOR

 

 

INTERNAL PROTECTOR(FUSE)FOR MOTOR

CAPACITOR

 

35µF,270VAC

40µF,270VAC

35µF,270VAC

MOTOR ASSEMBLY,SINGLE

 

Shadedpolemotor,72W/1.4A,Thermalcutoff:266°FV/130°C

Inductive motor,Thermal protect

Inductive motor,Thermal protect

SWITCH ASSEMBLY,MICRO

 

 

15A/250VAC

 

OUTSIDED MENSIONS WxHxD,mm(in)

385X540X340(15 5/32 x 21 1/4 x 13 3/8)

NET WEIGHT,kg(lbs)

 

20.1(44.3)

20.4(44.9)

22.2(48.9)

*NOTE: Specifications are subject to minor change without notice for further improvement.

—4—

1.4 CONTROL TYPE

1.4.1 Mechanical type

 

4

5

 

 

6

 

 

3

7

High

 

 

 

 

2

 

8

Auto

1

9

Low

Shut-Off

 

 

 

 

 

Off

Max

Fan Speed

Humidity Control

Figure 2

Auto Shut-Off

This light glows when the bucket is full, or when the bucket is removed or not placed in the proper position. In these cases the Water Level Control Switch shuts off the dehumidifier.

When the light glows, check the bucket condition.

Humidity Control

When you first use the dehumidifier, turn the humidity control to 5 or 6. If you still have moisture, turn the humidity control to a higher setting.

MAX is the highest setting.

When excess moisture and dampness odors are gone, adjust the control to a lower setting. Use the dehumidifier as long as excess moisture is present.

Fan Speed

The fan control adjusts the fan speed.

Set the fan control to HIGH for maximum moisture removal. When the humidity has been reduced and quiet operation is preferred, set the fan control to

LOW.

1.4.2 Electronic type

Figure 3

Fan Speed

This controls the speed of the airflow.

High: Fan speed is set to high.

Low: Fan speed is set to low.

When Fan Speed button is pressed, the fan speed mode is changed.

Timer

Press this button to select type of operation.

Select continuous On for uninterrupted operation.

Select either 2 or 4 hr. On/Off for cycled operation: The unit will operate for 2 or 4 hours, and then shut off completely for 2 or 4 hours.

The cycle repeats until you change the setting.

When Timer button is pressed, the Timer indicator lights shift as follow from 2hr.On/Off to 4hr.On/Off.

Bucket Full Indicator

This light glows when the water bucket is full and needs to be emptied.

Auto Restart

Once power is restored after a power outage, the unit returns to its previous operation setting after a 2 minute delay.

The fan runs immediately when the power is restored.

Power

Operation starts when this button is pressed and stops when the button is pressed again.

Humidity Control

• This button controls the humidity in the room.

• Press

button to raise the humidity setting.

• Press

button to lower the humidity setting.

The humidity setting can be set to a permanent "On" setting or to a specific humidity setting between 35% and 70% in 5% increments.

"On" setting: Dehumidifier runs continuously regardless of humidity condition.

35% - 70% setting: Dehumidifier runs on and off according to surrounding humidity conditions.

— 5—

1.5HOW TO OPERATE DEHUMIDIFIER

1.5.1HOW DOES THE DEHUMIDIFIER WORK?

Moist, humid air is drawn over a cold refrigerated dehumidifying coil. Moisture in the air condenses on this coil and drains into a bucket (or through the bucket into a hose and drain).

Dry, clean air is drawn over the condenser where it is actually heated several degrees and discharged out the rear grill into the room. (See Figure 4)

It is normal for the surrounding air to become slightly warmer as the dehumidifier operates.

This warming effect further reduces the relative humidity of the surrounding air.

1.5.2 LOCATION FOR THE DEHUMIDIFIER

Allow at least 12 inches of space on all sides of the unit for good air circulation. (See Figure 5)

The dehumidifier must be operated in an enclosed area to be most effective.

Close all doors, windows and other outside openings to the room.

Place the dehumidifier in a location that does not restrict air flow into the front grille or out the rear grille.

The operation of dehumidifier in a basement will have little or no effect in drying an adjacent enclosed storage area, such as a closet, unless there is adequate circulation of air in and out of the area.

Motor

Condenser

Fan

 

Evaporator

 

 

 

Humid

 

Dry

 

Air Out

Air In

 

 

 

 

 

Rear Grille

Bucket

 

 

 

 

Compressor

Side View

Figure 4

12" 12"

Figure 5

1.5.3 MICRO SWITCH

The micro switch assembly, which is located on the drain pan of inside unit, automatically shuts off the dehumidifier when the bucket is full (note, the Auto Shut Off lights, to indicate bucket must be emptied). The bucket replaces in its place, the unit again turns itself on.

1.5.4 AUTO DEFROST

When frost builds up on the cooling coils, the unit will automatically cycle off until the frost disappears. The fan continues to run.

NOTE: The unit will not operate satisfactorily if the room temperature is below 65˚F(18˚C). If the dehumidifier is operated in low temperature conditions frost can form in the evaporator coil and the unit will cycle ON/OFF repeatedly. In this case, please check your room temperature conditions and stop the unit.

NOTE: The low temperature operation feature in the BHD-501-D and BHD-651-D models will continuously cycle up to a temperature of 42°F(6°C).

—6—

1.5.5 HUMIDITY CONTROLLER

1.5.5.1 Mechanical Type

The humidity control can be set anywhere between Off and Max for normal operation.

If you need more dehumidification, turn the Humidity Control toward Max. If you need less dehumidification, turn the Humidity Control toward Off.

The relative humidity range is from 20% to 80%. (See Figure 6)

Turn the Humidity Control to Off to stop the unit manually.

1.5.5.2 Electronic Type

The humidity control can be set 'on' or 35%-70% RH(Relative Humidity) for normal operation. (See Figure 7)

If you need drier air, press the Humidity Control button.

If you need moister air, press the Humidity Control button.

Press the Power button to stop the unit manually.

42% R.H

5(42%)

 

4(50%)

40%

6(35%)

3(60%)

 

7(30%)

2(70%)

 

8(25%)

1(80%)

 

9(20%)

Off

DEAD DIAL

Max.

 

 

Figure 6

Figure 7

—7—

2. CIRCUIT DIAGRAM

• MODEL : BHD-301-D

NO. DESCRIPTION

1 POWER CORD ASSEMBLY

2 SWITCH, ROCKER

3MOTOR ASSEMBLY

4CAPACITOR

5COMPRESSOR, SET

6OLP

7 PWB(PCB) ASSEMBLY, DISPLAY

8SENSOR ASSEMBLY

9 SWITCH ASSEMBLY, ROTARY

10SWITCH ASSEMBLY, MICRO

11PWB(PCB) ASSEMBLY, MAIN

PART NO.

Q'TY

RE-

BHD-301-D

PER SET MARKS

6411A20001Z

1

S

6600FX5001G

1

S

4681A20040Q

1

S

0CZZA20005J

1

S

TBZ31986001

1

S

EAF35787201

1

S

6871A20289B

1

S

6877A30013R

1

S

6601A30006A

1

S

6600A30003C

1

S

EBR39204301

1

S

S: SERVICE PARTS

A: ALTERNATE PARTS

N: NOT SERVICE PARTS

—8—

• MODEL : BHD-501-D/BHD-651-D

WIRING DIAGRAM

 

 

 

 

CN-FAN

 

MAIN PCB

 

 

 

 

BK(HI)

 

 

 

 

P.C.B

 

 

 

 

 

 

 

 

MOTOR

RD(LOW)

 

 

 

 

 

 

GN/YL

 

OR(COM)

 

 

 

 

CN-DISP

 

DISPLAY

 

 

 

 

 

 

 

 

 

YL

F

CAPACITOR

 

 

RY- O L

 

 

 

 

 

 

RY-HI

 

 

WH

 

 

 

 

 

 

C

 

 

 

 

 

BR CN-AC1

 

 

 

 

 

WH(BL) (N)

 

 

 

 

 

 

 

 

 

C

CAPACITOR

CN-AC2

 

 

CN-SEN

BUCKET

GN/YL

 

 

 

 

S/W

HUMIDITY

 

 

 

 

 

 

 

 

SENSOR

 

BK

 

 

 

 

 

 

 

R

H

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

COMP. S

RD

 

RY-COMP

 

POWER

 

 

 

 

BL

 

SMPS

 

 

 

 

 

4

3

 

 

THERMISTOR

C

 

 

 

 

 

FUSE 250V T3.15A

O.L.P

 

 

 

 

 

 

 

 

 

 

 

 

 

 

BK(BR) (L)

 

 

 

 

 

3854A20247Z

 

 

 

 

 

 

 

 

NO.

DESCRIPTION

PART NO.

Q'TY

RE-

BHD-501-D

BHD-651-D

PER SET

MARKS

 

 

 

 

 

 

 

 

 

 

 

 

1

POWER CORD ASSEMBLY

6411A20001Z

1

S

 

 

 

 

 

 

2

MOTOR ASSEMBLY

EAU32357501

EAU32357504

1

S

 

 

 

 

 

 

3

CAPACITOR

0CZZA20005N

0CZZA20005J

1

S

4

CAPACITOR

3H00660V

1

S

5

COMPRESSOR, SET

TBZ32067202

TBZ30951701

1

S

6

OLP.

EAF43158802

6750U-L048A

1

S

7

PWB(PCB) ASSEMBLY, DISPLAY

6871A20600B

1

S

8

SENSOR ASSEMBLY

6877A30013R

1

S

9

SWITCH ASSEMBLY, MICRO

6600A30003C

1

S

10

PWB(PCB) ASSEMBLY, MAIN

EBR36909301

EBR36909303

1

S

S: SERVICE PARTS

A: ALTERNATE PARTS

N: NOT SERVICE PARTS

—9—

3. DISASSEMBLY INSTRUCTIONS

3.1 MECHANICAL PARTS

3.1.1 BUCKET AND AIR FILTER

1. Turn the Humidity Control off(Mechanical type) or press the power button off. (Electronic type)

2. Disconnect the power supply.

3. Remove the bucket. (See Figure 9)

4. Pull out the air filter. (See Figure 10)

Figure 9

Figure 10

3.1.2 FRONT CASE AND REAR GRILLE

1. Remove 2 screws which fasten the front grille.

2. Pull the front grille forward and upward. (See Figure 11)

3. Remove 6 screws that secure the rear grille.

4. Remove the rear grille. (See Figure 12)

Figure 11

Figure 12

3.1.3. CABINET AND CONTROL BOX

1. Remove the Bucket, the Air filter and Front grille according to the procedure above.

2. Remove 1 screws that fasten Control box. (See Figure 13)

3. Remove 9 screws on all sides of the cabinet. 4. Lift the Cabinet from the base.(See Figure 13)

5. Remove a screw fasten the earth wire on the inside of control box.

6. Remove 1 screw that fasten control box and unhook control box from hook on the shroud. (See Figure 14)

Figure 13

Figure 14

—10—

3.2 CONTROL PARTS

3.2.1 POWER CORD ASSEMBLY

1.After opening the control box, remove the screw that holds the ground wire. (See Figure 15)

2.Disconnect the remaining leads of the power cord from the PWB(PCB) ASSEMBLY, MAIN, then remove it from the control box.

3.2.2 SENSOR ASSEMBLY

1.Disconnect the sensor assembly from the PWB(PCB) ASSEMBLY, MAIN.

2.Remove the screw which fastens the humidity sensor. (See Figure 16)

3.Remove the thermistor from the holder. (See Figure 16)

4.Disconnect the switch wires from the micro switch assembly. (See Figure 16)

3.2.3 PWB(PCB) ASSEMBLY, MAIN

1.Disconnect all leads of the motor and the compressor from PWB(PCB) ASSEMBLY, MAIN.

2.Remove the screw which fastens the PWB(PCB) ASSEMBLY, MAIN and pull it out after unhooking from 2 rectangular holes of the control box (lower). (See Figure 17)

3.2.4 CAPACITOR

1.Remove the screw that fastens the capacitor. (See Figure 17)

2.Disconnect all leads from the capacitor and then remove it from control box.

3.2.5 MICRO SWITCH ASSEMBLY

1.Turn the nut counterclockwise and pull out the micro switch from the drain pan. (See Figure 18)

—11—

Figure 15

Figure 16

Figure 17

Figure 18

3.2.6 CONTROL PANEL

3.2.6.1 CONTROL PANEL - Mechanical Type (BHD-301-D)

1. Disconnect housing and all leads of the rocker switch, SWITCH ASSEMBLY, ROTARY and PWB(PCB) ASSEMBLY, DISPLAY from PWB(PCB) ASSEMBLY, MAIN (3.1.3)

2. Pull out the knob assembly.

3. Remove the nut which fastens the SWITCH ASSEMBLY, ROTARY.

4. Remove the knob of the rotary switch by pulling it upward.

5. Pull out the rocker switch by pushing the hooks on the both sides of rocker switch.

6. Pull out the PWB(PCB) ASSEMBLY, DISPLAY after

turning over both hooks of the display cover.

Figure 19

3.2.6.2 CONTROL PANEL - Electronic Type (BHD-501-D, BHD-651-D)

1. Disconnect the housing of the PWB(PCB) ASSEMBLY, DISPLAY from PWB(PCB) ASSEMBLY, MAIN (3.1.3).

2. Remove 6 screws that secure the PWB(PCB) ASSEMBLY, DISPLAY to the display cover.

Figure 20

—12—

3.2.7 FAN AND MOTOR

1.Turn the nut left and full out the Fan by hands carefully.

2.Remove 2 screws that fasten Heat Exchange.

3.Lift the H/E and open the H/E around 45 degree clockwise carefully. (See Figure 21)

4.Unfasten 3 screws that secure the Motor and earth wire. (See Figure 22)

5.Remove the Motor.

3.2.8 SHROUD AND DRAIN PAN

1.Discharge the refrigerant by using a refrigerant Recovery System.

2.After purging the unit completely, unbrace the Discharge and the Suction tube connected compressor carefully.

3.Remove 2 screws that fasten the H/E.

4.Unfasten 2 screws that secure the shroud on the sides and then lift shroud from the drain pan. (See Figure 23)

5.Unfasten 2 screws that secure the drain pan to base pan. (See Figure 24)

6.Pull the drain pan backward then take it up from the base. (See Figure 24)

—13—

Figure 21

Figure 22

Figure 23

Figure 24

3.3 REFRIGERATING CYCLE

3.3.1 CONDENSER, EVAPORATOR AND CAPILLARY TUBE

1.

Remove the insulation on the Heater/Evaporator

 

 

 

(H/E) assembly

 

 

2.

Pierce the pinch-off tube to discharge the

 

 

 

refrigerant, using a refrigerant recovery system.

 

 

3.

After discharging the refrigerant completely,

 

 

 

remove 2 screws between the housing assembly

 

 

 

and the H/E. (See Figure 25)

 

 

4.

Lift the H/E and open the H/E around 45 degree

 

 

 

counterclockwise carefully.

Figure 25

Figure 26

5.

Unbraze each of interconnecting tubes of the

 

evaporator and condenser carefully.

 

 

6.

Remove the H/E assembly from the orifice.

 

 

 

(See Figure 26)

 

 

7.

Unbraze the capillary tube at the connections of the

 

 

 

condenser and evaporator. (See Figure 27)

 

 

8.

Remove 4 screws between the condenser and

 

 

 

evaporator. (See Figure 27)

 

 

3.3.2 COMPRESSOR

1.Discharge the refrigerant by using a refrigerant Recovery System.

2.After purging the unit completely, unbraze the suction and discharge tubes at the compressor connections.

3.Remove the nuts and washers which fasten the compressor. (See Figure 28)

4.Remove the compressor. (See Figure 28)

Figure 27

Using Rotary

Compressor models

Figure 28

—14—

3.4 HOW TO REPLACE THE REFRIGERATION SYSTEM

1.When replacing a refrigeration component, be sure to discharge the refrigerant system by using a refrigerant recovery system.

2.After discharging the unit completely, remove the desired component, and unbraze the pinch-off tubes.

3.Solder service valves into the pinch-off tube ports, leaving the valves open.

4.Solder the pinch-off tubes with service valves.

5.After doing the above procedures, the valve must be closed and left in place on the system for any subsequent procedures.

6.Evacuate as follows.

1)Connect the vacuum pump, as illustrated in Figure 30A.

2)Start the vacuum pump, slowly open manifold valves A and B two full turns counterclockwise and leave the valves open.

The vacuum pump is now pulling through valves A and B to valve C by means of the manifold and entire system.

CAUTION

If high vacuum equipment is used, just crack valves A and B for a few minutes, then open slowly with the two full turns counterclockwise. This will keep oil from foaming and being drawn into the vacuum pump.

3)Operate the vacuum pump for 20 to 30 minutes, until 600 microns of vacuum are obtained. Close valves A and B, and observe vacuum gauge for a few minutes. A rise in pressure would

indicate a possible leak or moisture remaining in the system. With valves A and B closed, stop the vacuum pump.

4)Remove the hose from the vacuum pump and place it on the charging cylinder. See Figure 30B. Open valve C.

Discharge the line at the manifold connection.

5)The system is now ready for final charging.

7.Recharge as follows :

1)Refrigeration cycle systems are charged from the High-side. If the total charge cannot be put

in the High-side, the balance will be put in the suction line through the access valve which you installed as the system was opened.

2)Connect the charging cylinder as shown in Figure 30B.

With valve C open, discharge the hose at the manifold connection.

3)Open valve A and allow the proper charge to enter the system. Valve B is still closed.

4)If more charge is required, the high-side will not take it. Close valve A.

5)With the unit running, open valve B and add the balance of the charge.

a.Do not add the liquid refrigerant to the Lowside.

b.Watch the Low-side gauge; allow pressure to rise to 30 lbs.

c.Turn off valve B and allow pressure to drop.

d.Repeat steps B and C until the balance of the charge is in the system.

6)When satisfied the unit is operating correctly, use the pinch-off tool with the unit still running and clamp on to the pinch-off tube. Using a tube cutter, cut the pinch-off tube about 2 inches from the pinch-off tool. Use sil-fos solder and solder pinch-off tube closed. Turn off the unit, allow it to set for a while, and then test the leakage of the pinch-off connection.

—15—

Equipment needed: Vacuum pump, charging cylinder, manifold gauge, brazing equipment. pinch-off tool capable of making a vapor-proof seal, leak detector, tubing cutter, hand tools to remove components, service valve.

EVAPORATOR ASSEMBLY (LOW PRESSURE SIDE)

CONDENSER ASSEMBLY (HIGH PRESSURE SIDE)

COMPOUND GAUGE

MANIFOLD

GAUGE

B

COMPRESSOR

Figure 29

LOW HI

 

A

 

B

B

A

 

 

EXTERNAL

 

 

VACUUM PUMP

 

CHARGING

CYLINDER

C

Figure 30A-Pulling Vacuum

Figure 30B-Charging

—16—

4. TROUBLESHOOTING GUIDE

CONDITION

CAUSE

REMEDY

1. Dehumidifier does not start. (Both

No power

Check power supply at outlet.

compressor and fan motor do not

 

Correct if none.

operate.)

 

 

Poor plug contact at outlet.

Install plug properly or replace it.

 

 

 

 

 

Bucket is full.

If Auto Shut Off lights, empty the bucket

 

 

and replace properly.

 

 

 

 

Humidity control is at Off position

Turn the humidity control switch toward

 

 

Max.

 

 

 

 

Wire disconnected or loose

Connect wire. Refer to wiring diagram for

 

 

terminal identification. Repair or replace

 

 

loose terminal.

 

 

 

 

Capacitor.

Test capacitor.

 

(Discharge capacitor before testing.)

Replace if not within ±10% of

 

 

manufacturer's rating. Replace if shorted,

 

 

open, or damaged.

 

 

 

2. Motor runs but compressor does not

Voltage (115V ± 10%)

It must be between 103.5V and 126.5V. If

run.

 

not within limits, call an electrician

 

 

 

 

Wiring

Check the wire connections; If loose,

 

 

repair or replace the terminal. If the wires

 

 

are disconnected, refer to wiring diagram

 

 

for identification, and replace the wires.

 

 

Check the wire connections; If not

 

 

according to the wiring diagram, correct

 

 

the connections.

 

 

 

 

Rotary switch

Check for continuity, refer to the wiring

 

 

diagram for terminal identification. Replace

 

 

the switch if the circuit is open.

 

 

 

 

Defrost control

The Defrost Control senses frost build-up

 

 

on the evaporator coil and automatically

 

 

shuts off the compressor. The fan

 

 

continues to run, drawing air across the

 

 

coil, and melting the frost. When the coil is

 

 

defrosted, the compressor automatically

 

 

restarts, and dehumidifying resumes.

 

 

 

 

Capacitor

Check the capacitor.

 

(Discharge capacitor before servicing.)

Replace if not within ±10% of

 

 

manufacturer's rating. Replace if shorted,

 

 

open, or damaged.

 

 

 

 

Compressor

Check the compressor for open circuit or

 

 

ground. If open or grounded, replace the

 

 

compressor.

 

 

 

 

Overload protector (OLP)

Check the compressor OLP if externally

 

 

mounted. Replace if open. (If the

 

 

compressor temperature is high, remove

 

 

OLP, cool, and retest.)

 

 

 

3. Does not defrost control.

Defrost control is defective.

Check defrost control, replace it.

 

 

 

4. Insufficient dehumidification

Low relative humidity

Turn dehumidifier off.

 

Poor air circulation

Move dehumidifier to obtain free and

 

 

unobstructed air circulation.

 

 

 

 

H/E clogged with dust and dirt

Clean evaporator and/or condenser assembly

 

 

 

 

Air filter is dirty.

Clean it.

 

 

 

 

Motor is not operating.

Check Motor, repair or replace it.

 

 

 

— 17—

CONDITION

CAUSE

REMEDY

5. Noisy operating

Fan

If cracked, out of balance, or partially

 

 

missing, replace it

Loose foreign material inside the housing. Tube hits frame.

Fan blade hits frame Internal compressor noise. Loose set screws

Worn bearings of Motor Assembly

Remove it.

Adjust tubing routine carefully.

Check Motor Mount. If loose, tighten it. Replace compressor.

Tighten them.

If knocking sounds continue when running or loose, replace the motor. If the motor hums or noise appears to be internal while running, replace motor assembly.

6. Water drips

The bucket is not installed properly.

The bucket should be properly positioned on the hangers of the drain pan.

 

Connection may be loose.

Check connection and repair.

 

Leak in bucket

Replace bucket.

 

Water drips when bucket removed for

Before removing bucket, the unit should

 

emptying.

be turned off.

 

Bucket overflows.

Check micro switch and float.

7. Compressor cycles on overload

High or low line voltage. (115V ± 10%)

Check line voltage. It must be between

protector. (OLP)

 

103.5V and 126.5V volts.

 

 

If intermittent, provide new supply.

 

Poor air circulation.

Move dehumidifier for free and

 

 

unobstructed air flow.

Heat Exchange clogged with dust or dirt. Motor

Short circuit or ground in electrical circuit Unit pressures not equalized

Capacitor

Wiring

Refrigeration system

Stuck compressor

Overload protector (OLP)

Clean dust or dirt on the Heat Exchange.

If not running, determine the cause. Replace if required.

Check electrical circuit. Repair.

Allow 2 or 3 minutes for pressure to equalize before starting compressor.

Test the capacitor.

Check the terminals. If loose, repair or replace.

Check the system for a restriction. Check compressor, replace compressor

Check OLP, if externally mounted. Replace if open. (If the compressor temperature is high, remove the OLP, cool, and retest.)

—18—

5.ExplodedView

• MODEL:BHD-301-D

554030

354210

266002

149410

268711-1

266003

235512

148391

W0CZZ-2

149980

349600

359012

268711-2

 

264110

346811

249950

 

435300

 

131400

165010

135312

238310

436500

352113

35211A

152302

266010

552111

752140

330870 567502

 

130410

 

554160

144410

550140

 

— —

—19—

• MODEL:BHD-501-D

 

149980

 

W0CZZ-2

 

349600

 

 

 

554030

 

 

354210

 

359012

W0CZZ

 

 

268711-2

 

 

 

 

346811

 

249950

 

 

435300

 

 

131400

 

264110

 

 

 

 

135312

 

165010

 

 

 

 

238310

 

 

235512

 

 

 

268711-1

 

 

 

 

 

436500

 

 

 

 

352113

 

 

 

35211A

 

152302

 

 

 

266010

 

 

 

 

 

552111

 

 

752140

 

 

 

330870

 

 

 

 

567502

 

 

130410

 

 

 

 

554160

148391

144410

 

550140

 

 

— —

—20—

• MODEL:BHD-651-D

 

149980

W0CZZ-2

 

349600

 

 

554030

 

354210

359012

W0CZZ

 

268711-2

 

 

 

346811

249950

 

435300

 

 

131400

264110

 

 

 

135312

165010

 

 

 

238310

 

235512

 

 

268711-1

 

 

 

436500

552111

 

 

 

 

35211A

 

152302

 

 

 

266010

 

 

352113

 

 

752140

 

 

330870

 

 

567502

 

 

130410

 

 

554160

148391

144410

550140

 

— —

—21—

6. REPLACEMENT PARTS LIST

• MODEL: BHD-301-D

LOCATION

DESCRIPTION

PARTNO

REMARK

No.

 

BHD-301-D

 

 

 

 

 

 

 

 

130410

Base Assembly,Single

3041A10042E

R

144410

Roller

4441A30001B

R

149980

Shroud

4998A10034B

R

266010

Switch Assembly

6600A30003C

R

330870

Pan Assembly,Drain

3087A10019C

R

349600

Bracket,Motor

4960A20009B

R

550140

Washer,Customized

1WZZA31003A

R

554160

Compressor Set,China

TBZ31986001

R

567502

Overload Protect

EAF35787201

R

131400

Cabinet

3090A10042G

R

135312

Grille Assembly,Front

3531A18012R

R

148391

Tank Assembly,Bucket

4839A10002F

R

149410

Knob Assembly

4941A30019B

R

152302

Filter,Air

5230A20040A

R

165010

Sensor Assembly

6877A30013R

R

235512

Cover Assembly,Display

3551A20122A

R

238310

Escutcheon

MDD30271507

R

249950

Case Assembly,Control

4995A20359U

R

264110

Power Cord Assembly

6411A20001Z

R

266002

Switch,Rocker

6600FX5001G

R

266003

Switch Assembly

6601A30006A

R

268711-1

PCB Assembly,Display

6871A20289B

R

268711-2

PCB Assembly,Main

EBR39204301

R

346811

AC Motor

4681A20040Q

R

352113

Tube Assembly,Discharge

AJR35684801

R

35211A

Tube Assembly,Suction

AJR36226101

R

354210

Evaporator Assembly,First

5421A10009X

R

359012

Fan,Turbo

5900A20007B

R

435300

Grille,Rear

3530A10193E

R

436500

Handle

3650A20004D

R

552111

Tube Assembly,Capillary

AJR35685801

R

554030

Condenser Assembly,First

5403A10008W

R

752140

Connector,Hose

5214A20027B

R

W0CZZ-2

Capacitor,Film,Box

0CZZA20005J

R

—22—

• MODEL: BHD-501-D

LOCATION

DESCRIPTION

PART NO

REMARK

NO

BHD-501-D

 

 

130410

Base Assembly,Single

3041A10042A

R

131400

Cabinet

3090A10042G

R

135312

Grille Assembly,Front

AEB36976502

R

144410

Roller

4441A30001B

R

148391

Tank Assembly,Bucket

4839A10002F

R

149980

Shroud

4998A10034B

R

152302

Filter,Air

5230A20040A

R

165010

Sensor Assembly

6877A30013R

R

235512

Cover Assembly,Display

3551A20109C

R

238310

Escutcheon

MDD30271508

R

249950

Case Assembly,Control

ABQ36532606

R

264110

Power Cord Assembly

6411A20001Z

R

266010

Switch Assembly

6600A30003C

R

330870

Pan Assembly,Drain

3087A10019C

R

346811

Motor Assembly,AC

EAU32357501

R

349600

Bracket,Motor

4960A20009D

R

352113

Tube Assembly,Discharge

AJR36701401

R

354210

Evaporator Assembly,First

5421A10009Q

R

359012

Fan,Turbo

5900A20007B

R

435300

Grille,Rear

3530A10193E

R

436500

Handle

3650A20004D

R

550140

Damper,Compressor

4830A30005A

R

552111

Tube Assembly,Capillary

AJR32779301

R

554030

Condenser Assembly,First

5403A10008N

R

554160

Compressor Set,China

TBZ32067202

R

567502

Overload Protect

EAF43158802

R

752140

Connector,Hose

5214A20027B

R

268711-1

PCB Assembly,Display

6871A20600B

R

268711-2

PCB Assembly,Main

EBR36909301

R

35211A

Tube Assembly,Suction

5211A38801C

R

W0CZZ

Capacitor,Film,Box

0CZZA20005N

R

W0CZZ-2

Capacitor,Film,Box

3H00660V

R

—23—

• MODEL: BHD-651-D

LOCATION

DESCRIPTION

PART NO

REMARK

No.

BHD-651-D

 

 

130410

Base Assembly,Single

3041A10042A

R

131400

Cabinet

3090A10042G

R

135312

Grille Assembly,Front

AEB36976502

R

144410

Roller

4441A30001B

R

148391

Tank Assembly,Bucket

4839A10002F

R

149980

Shroud

4998A10034C

R

152302

Filter,Air

5230A20040A

R

165010

Sensor Assembly

6877A30013R

R

235512

Cover Assembly,Display

3551A20109C

R

238310

Escutcheon

MDD30271508

R

249950

Case Assembly,Control

ABQ36532603

R

264110

Power Cord Assembly

6411A20001Z

R

266010

Switch Assembly

6600A30003C

R

330870

Pan Assembly,Drain

3087A10019E

R

346811

Motor Assembly,AC

EAU32357504

R

349600

Bracket,Motor

4960A20009D

R

352113

Tube Assembly,Discharge

AJR36966901

R

354210

Evaporator Assembly,First

ADL36964801

R

359012

Fan,Turbo

MDG41709701

R

435300

Grille,Rear

3530A10193E

R

436500

Handle

3650A20004D

R

550140

Damper,Compressor

4830A30005A

R

552111

Tube Assembly,Capillary

AJR36953601

R

554030

Condenser Assembly,First

5403A20114H

R

554160

Compressor Set,China

TBZ31951701

R

567502

Overload Protect

6750U-L048A

R

268711-1

PCB Assembly,Display

6871A20600B

R

268711-2

PCB Assembly,Main

EBR36909303

R

35211A

Tube Assembly,Suction

5211A10454B

R

W0CZZ

Capacitor,Film,Box

0CZZA20005J

R

W0CZZ-2

Capacitor,Film,Box

3H00660V

R

—24—

MEMO

— 25—

MEMO

— 26—

Specifications and performance data subject to change without notice.

HEAT CONTROLLER, INC.

1900 WELLWORTH AVENUE • JACKSON, MICHIGAN 49203

THE QUALITY LEADER IN CONDITIONING AIR

P/No.: MFL38891301