Friedrich D30A, D40A, D50A, D65A Service And Parts Manual

Dehumidifier

Service and Parts

Manual

D30A / D40A / D50A / D65A (03/03)

D30A D40A D50A D65A

—2—

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 ..................................................................................................................................................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

1.5.6 DRIER ...............................................................................................................................................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 HOUSING ASSEMBLY, FAN AND MOTOR ...................................................................................12

3.2.8 DRAIN PAN.....................................................................................................................................13

3.3 REFRIGERATING CYCLE .......................................................................................................................13

3.3.1 CONDENSER, EVAPORATOR AND CAPILLARY TUBE...............................................................13

3.3.2 P.T.C. OR OVERLOAD PROTECTOR (O.L.P.) FOR RECIPROCATING COMPRESSOR ...........13

3.3.3 ROTARY COMPRESSOR ..............................................................................................................13

3.4 HOW TO REPLACE REFRIGERATION SYSTEM...................................................................................14

4. TROUBLESHOOTING GUIDE...................................................................................................16

5. EXPLODED VIEW - INTRODUCTION..................................................................................19

6. REPLACEMENT PARTS LIST...................................................................................................23

CONTENTS

—3—

1. PREFACE

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

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

1.1 SAFETY PRECAUTIONS

• Disconnect power supply before servicing or replacing any electrical or non-electrical component.

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

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.

1.2.2 DIMENSIONS (mm/in)

385 (15

3

/

16

) 340 (13

6

/

16

)

530 (20

14

/

16

)

385 (15

3

/

16

) 340 (13

6

/

16

)

600 (23

10

/

16

)

D30A/D40A Model D50A/D65A Model

Figure 1

HUMIDITY
CONTROL

FAN

SPEED

TIMER

BUCKET
FULL

High
Low

Continuous On.
4Hr. On/Off
2Hr. On/Off

POWER

HUMIDITY
CONTROL

FAN

SPEED

TIMER

BUCKET

FULL

High
Low

Continuous On.
4Hr. On/Off
2Hr. On/Off

POWER

—4—

1.3 SPECIFICATIONS

CAPACITY (Pints/24hrs) 30 40 50 65
POWER SUPPLY (Phase, V, Hz) 1ø, 115V, 60Hz
REFRIGERANT R134a R22
REFRIGERANT CHARGE, oz(g) 5.47(155) 5.64(160) 7.23(205) 7.76(220)

THERMISTOR

OPEN

30.2°F(-1 ±0.5°C) 32.9°F(0.5 ±0.5°C) 30.2°F(-1 ±0.5°C)

CLOSE

50.0°F(10 ±0.5°C) 53.6°F(12 ±0.5°C) 50.0°F(10 ±0.5°C)

COMPRESSOR MODEL NO. LX86HAQG 2S7B126A QA084CBB QA114CBF

TYPE P6R8MC

TIME

AMPERE

10A

VOLTAGE 200V

PROTECTOR

• OVERLOAD PROTECTOR FOR COMPRESSOR

• INTERNAL PROTECTOR(FUSE) FOR MOTOR

CAPACITOR -

40µF, 200VAC 30µF, 270VAC 35µF, 270VAC

MOTOR ASSEMBLY, SINGLE

Shaded pole motor, 65W/1A , Thermal cutoff : 266°F/130°C

SWITCH ASSEMBLY, MICRO 15A/250VAC

30, 40 PINTS 385 x 530 x 340 (15

3

/

16

x 20

14

/

16

x 13

6

/

16

)

50, 60 PINTS 385 x 600 x 340 (15

3

/

16

x 23

10

/

16

x 16

6

/

16

)

NET WEIGHT, kg(lbs) 22.7(50.0) 17.2(37.8) 21.2(46.8) 21.6(47.6)

MODELS

ITEMS

P.T.C.
ASSEMBLY

MAXIMUM

-

WORKING TIME: 0.3 ~ 1.3 sec.

RETURN TIME: 65 sec.

–

OUTSIDE

DIMENSIONS

W x H x D, mm(in)

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

D30A D40A D50A D65A

—5—

Bucket Full Indicator

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

Power

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

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 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 follows: Continuous ➔
2 Hr. On/Off ➔ 4 Hr. On/Off ➔ Continuous .

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.

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.

Figure 2

HUMIDITY
CONTROL

FAN

SPEED

TIMER

BUCKET

FULL

High
Low

Continuous
4Hr. On/Off
2Hr. On/Off

POWER

1.4 CONTROL

—6—

1.5.1 HOW 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
front grille into the room. (See Figure 3)

■ 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 4)

■ 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 rear coil or out the front 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.

Dry

Air Out

Humid

Air In

Fan

Condenser

Evaporator

Motor

Drain
Connection

Compressor

Bucket

12"

12"

Figure 3

Figure 4

1.5 HOW TO OPERATE DEHUMIDIFIER

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 is designed to be operated at temperature above 65°F(18°C) in normal condition. If the dehumidifier is

operated in low temperature conditions, the temperature and humidity conditions of room are low, some frost
can be formed in its evaporator coil and the unit will be operated ON/OFF repeatedly. In this case, please check
on your room temperature condition and stop the unit.

1.5.5 HUMIDITY CONTROLLER

The humidity control can be set 'On' or 35%-70%
RH(Relative Humidity) for normal operation. (See Figure 5)

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.

1.5.6 DRIER (D30A)

Dryer is used to prevent capillary blockage from moisture in
the refrigerant system and H/E, condenser and evaporator.
Also, dryer is used to remove corrosion of the components.

NOTE: When dryer is replaced, proper injection to

capillary is needed. On opening the dryer, it
should be welded instantly. The oxidization of
dryer inside and all tubes inside after welding
can be prevented.

—7—

Dryer

Figure 5

Figure 6

—8—

2. CIRCUIT DIAGRAM

• MODEL : D30A

WIRING DIAGRAM

3854A20247E

MAIN PCB

CN-FAN

CN-AC1

RY-COMP

RY-LO

RY-HI

FUSE 250V T3.15A

POWER
TRANS

CN-AC2

CN-SEN

CN-DISP1

HUMIDITY
SENSOR

THERMISTOR

DISPLAY P.C.B

BUCKET
S/W

43

BK

BR

WH(BL) (N)

BK(BR) (L)

BK(HI)
RD(LOW)
OR(COM)

MOTOR

GN/YL

GN/YL

36

5

4

BL

M

C

S

O.L.P

COMP.

Q'TY

PER SET

1
1
1
1
1
1
1
1
1

RE-

MARKS

S
S
S
S
S
S
S
S
S

LOCATION

NO.

1
2
3
4
5
6
7
8
9

DESCRIPTION

POWER CORD ASSEMBLY
MOTOR ASSEMBLY, SINGLE
P.T.C. ASSEMBLY
RE-COMPRESSOR, SET
O.L.P.
PWB(PCB) ASSEMBLY, DISPLAY
SENSOR ASSEMBLY
SWITCH ASSEMBLY, MICRO
PWB(PCB) ASSEMBLY, MAIN

D30A

6411A20001Y
4681A20040E
6748C-0003D
2521C-A8626
6750C-0009E
6871A20279B
6877A30013H
6600A30003C
6871A20162K

PART NO.

S: SERVICE PARTS A: ALTERNATE PARTS N: NOT SERVICE PARTS

—9—

• MODEL : D40A/D50A/D65A

WIRING DIAGRAM

3854A20247F

MAIN PCB

CN-FAN

CN-AC1

RY-COMP

RY-LO

RY-HI

FUSE 250V T3.15A

POWER
TRANS

CN-AC2

CN-SEN

CN-DISP1

HUMIDITY
SENSOR

THERMISTOR

DISPLAY P.C.B

BUCKET
S/W

43

BL

BR

RD

WH(BL) (N)

BK(BR) (L)

BK

BK(HI)
RD(LOW)
OR(COM)

MOTOR

R

C

S

O.L.P

COMP.

GN/YL

GN/YL

CAPACITOR

C

H

Q'TY

PER SET

1
1
1
1
1
1
1
1
1

RE-

MARKS

S
S
S
S
S
S
S
S
S

LOCATION

NO.

1
2
3
4
5
6
7
8
9

DESCRIPTION

POWER CORD ASSEMBLY
MOTOR ASSEMBLY SINGLE
CAPACITOR
COMPRESSOR (ROTARY), SET
O.L.P. (ASSEMBLY)
PWB(PCB) ASSEMBLY, DISPLAY
SENSOR ASSEMBLY
SWITCH ASSEMBLY, MICRO
PWB(PCB) ASSEMBLY, MAIN

D40A D50A D65A

6411A20001Y 6411A20001Z

4681A20040E

0CZZA20003D 0CZZA20001R 6120AR2359V

5416A90009A 2520UCDA003 2520UCDA004
6751A20001F 6750U-L058A 6750U-L048A

6871A20279A
6877A30013H
6600A30003C

6871A20162L 6871A20162K

PART NO.

S: SERVICE PARTS A: ALTERNATE PARTS N: NOT SERVICE PARTS

3.1 MECHANICAL PARTS

3.1.1 BUCKET AND AIR FILTER

1. Disconnect the power supply.

2. Press the power button off.

3. Remove the bucket. (See Figure 7)

4. Pressing the hooks, pull out the air filter.
(See Figure 8)

3.1.2 FRONT CASE AND TOP COVER

1. Remove 4 screws which fasten the front case.

2. Pull the front case at the lower side to the front and
push front case upward. (See Figure 9)

3. Remove 2 screws that secure the top cover and
cabinet.

4. Separate the top cover. (See Figure 10)

3.1.3.

CABINET AND CONTROL BOX (Upper)

1. Remove the bucket, air filter and top cover
according to the procedure above.

2. Remove a screws which fasten the control box
(upper), and pull out the control box (upper). (See
Figure 11)

3. Disconnect housing PWB(PCB) ASSEMBLY,
DISPLAY from control box(lower) and remove front
case completely.

4. Remove 7 screws on all sides of the cabinet.

5. Lift up the cabinet a little from the base pan and
separate it by pulling out backward.

(See Figure 12)

—10—

3. DISASSEMBLY INSTRUCTIONS

Figure 7 Figure 8

Figure 9 Figure 10

Figure 11 Figure 12

3.2 CONTROL PARTS

3.2.1 POWER CORD ASSEMBLY

1. After opening the control box, remove all screws
that fasten the earth wires. (See Figure 13)

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

3.2.2 SENSOR ASSEMBLY

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

2. Remove a screw which fasten the humidity sensor.
(See Figure 14)

3. Remove the thermistor from holder sensor. (See
Figure 14)

4. Disconnect housing from micro switch assembly.
(See Figure 14)

3.2.3 PWB(PCB) ASSEMBLY , MAIN

1.

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

2. Remove a screw which fastens the PWB(PCB)
ASSEMBLY, MAIN and pull it out after unhooking
from 2 rectangular holes of control box (lower).
(See Figure 15)

3.2.4 CAPACITOR

(Except D30A)

1. Remove a screw that fastens capacitor.
(See Figure 15)

2. Disconnect all leads of capacitor 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 16)

—11—

Figure 15

Figure 14

Figure 16

Figure 13

—12—

3.2.6 CONTROL PANEL

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

2. Remove 5 screws that secure the PWB(PCB)
ASSEMBLY, DISPLAY to cover display.

3.2.7 HOUSING ASSEMBLY , FAN AND

MOTOR

1. Remove 4 screws that fasten the housing assembly
to heat exchanger and drain pan, and lift housing
assembly upward after unhooking 2 hooks on the
housing. (See Figure 18)

2. Remove a screw that secures housing and orifice,
and separate the orifice from housing after
unhooking 3 hooks on the housing. (See Figure 19)

3. Turn the nut clockwise and full out the fan by hands
carefully. (See Figure 19)

4. Unfasten 2 screws that secure the motor.
(See Figure 20)

5. Separate the motor.

Figure 17

Figure 18

Figure 19

Figure 20

3.2.8 DRAIN PAN

1. Remove the housing assembly according to the
procedure above.

2. Unfasten 2 screws that secure the drain pan to base
pan.

3. Pull the drain pan backward then take it up from the
base pan. (See Figure 21)

3.3 REFRIGERATING CYCLE

3.3.1 CONDENSER, EVAPORATOR AND

CAPILLARY TUBE

1. Remove the insulation on the H/E assembly

2. Pierce the pinch-off tube to discharge the refrigerant,
using a FREONTMrecovery system.

3. After discharging the refrigerant completely, remove 2
screws between the housing assembly and H/E. (See
Figure 22)

4. Lift the H/E and open the H/E around 45 degree
counterclockwise carefully.

5. Unbrace each of interconnecting tubes of the
evaporator and condenser carefully.

6. Remove the H/E assembly from the orifice.
(See Figure 23)

7. Unbrace the capillary tube at the connections of each
condenser and evaporator. (See Figure 24)

8. Remove 4 screws between condenser and evaporator.
(See Figure 24)

3.3.2 P.T.C. OR OVERLOAD PROTECTOR

(O.L.P.) FOR RECIPROCATING COMPRESSOR
(D30A)

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

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

3. Remove a screw or a nut which fastens the terminal
cover

4. Disconnect the lead wire from the overload protector or
P.T.C. assembly.

5. Remove the overload protector(O.L.P) or P.T.C.
assembly. (See Figure 25)

3.3.3 ROTARY COMPRESSOR

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

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

3. Remove the nuts and washers which fasten the
compressor. (See Figure 26)

4. Remove the compressor. (See Figure 26)

—13—

Figure 21

Figure 22 Figure 23

Figure 24

Figure 25

Using Recipro Compressor model

Using Rotary

Compressor models

Figure 26

—14—

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

2. After discharging the unit completely, remove the
desired component, and unbrace 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 27A.

2) Start the vacuum pump, slowly open manifold
valves A and B with two full turns
counterclockwise and leave the valves closed.
The vacuum pump is now pulling through valves
A and B up to valve C by means of the manifold
and entire system.

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 27B.
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
27B.
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 Low-

side.

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.

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.

CAUTION

3.4 HOW TO REPLACE THE REFRIGERATION SYSTEM

NOTE:

THE REFRIGERANT R134a IS
USED SOME MODELS.
CHECK THE SPECIFICATION
LABEL ON THE CABINET.

When discharging refrigerant R134a, purging instrument
should be used only for R134a, without mixing that of
refrigerant R22.

When checking the leakage of refrigerant R134a,
leakage test tool should be used only for R134a.

The pump for discharging should be high efficiency.
Final discharging value must be managed below 0.5 Torr.

Maximum water should be less than quantity 150mg in
the cycle-all tubes and H/E assembly-system.
If water quantity is over 150mg, it causes acid or
corrosion in the cycle system and the capillary tube to be
clogged by water and harmful materials.

The model charged the refrigerant R134a should be
used dryer to prevent water from overflowing.

—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.

B

A

COMPRESSOR

COMPOUND GAUGE

MANIFOLD
GAUGE

SEE INSETS

BELOW

B

A

COMPRESSOR

EXTERNAL
VACUUM PUMP

CHARGING
CYLINDER

HILOW

CAPILLARY

TUBE

COMPOUND GAUGE

MANIFOLD
GAUGE

SEE INSETS

BELOW

A

B

A

B

C

CONDENSER ASSEMBLY

(HIGH PRESSURE SIDE)

EVAPORATOR ASSEMBLY

(LOW PRESSURE SIDE)

CONDENSER ASSEMBLY

(HIGH PRESSURE SIDE)

EVAPORATOR ASSEMBLY

(LOW PRESSURE SIDE)

CAPILLARY

TUBE

Figure 27A-Pulling Vacuum

Figure 27B-Charging

—16—

Dehumidifier does not dry
the air as it should.

The fuse is blown/circuit
breaker is tripped.

Make sure the dehumidifier's plug is
pushed completely into the outlet.

Dehumidifier does not start.

Ineffective dehumidifying

Noise

Repair gas leak.

Bucket is not in the proper
position and light is on.

Check if wiring loose or fails.

The dehumidifier is unplugged.

Water has reached its preset level.

Replace wiring.

Empty the bucket and replace properly.

The control may not be set high
enough.

Check if the unit is securely
positioned.

Check for gas leakage at heat
exchange and connecting tube.

Check the house fuse/circuit breaker
box and replace the fuse or reset
the breaker.

Make sure the slots on both sides of
the bucket are positioned correctly.

Doors and windows may
not be closed tightly.

Check that all doors, windows and
other openings are securely closed.

Make sure there are no curtains,
blinds or furniture blocking the front
or back of the dehumidifier.

Clothes dryer may be blowing
moisture-laden air into the room.

Install the dehumidifier away from
the dryer.
The dryer should be vented to the
outside.

Set and use the dehumidifier at a
sturdy, flat, and level place.

Clean the air filter.Check if the air filter is clogged

with dust.

Turn the Humidity Control knob to a
higher number.

Room temperature is too low. Moisture removal is best at higher

room temperatures.
Lower room temperatures will reduce
the moisture removal rate.
This unit is designed to be operated
at temperatures above 65°F(18°C)

Airflow is restricted.

Problem Possible Causes Remedy

4. TROUBLESHOOTING GUIDE

CONDITION

1. Dehumidifier does not start. (Both
compressor and fan motor do not
operate.)

2. Motor runs but compressor does not
run.

3. Does not defrost control.

4. Insufficient dehumidification

CAUSE

No power

Poor plug contact at outlet.
Bucket is full.

Humidity control is at Off position

Wire disconnect or loose

Capacitor.
(Discharge capacitor before testing.)

Voltage (115V ± 10%)

Wiring

Rotary switch

Defrost control

Capacitor
(Discharge capacitor before servicing.)

Compressor

Overload protector (O.L.P.)

Defrost control is defective.
Low relative humidity
Poor air circulation

H/E clogged with dust and dirt
Air filter is dirty.
Motor is not operating.

REMEDY

C

heck power supply at outlet.

Correct if none.
Install plug properly or replace it.
If Auto Shut Off lights, empty the bucket

and replace properly.
Turn the humidity control switch toward

Max.
Connect wire. Refer to wiring diagram for

terminal identification. Repair or replace
loose terminal.

Test capacitor.
Replace if not within ±10% of
manufacturer's rating. Replace if shorted,
open, or damaged.

It must be between 103.5V and 126.5V. If
not within limits, call an electrician

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.

Check for continuity, refer to the wiring
diagram for terminal identification. Replace
the switch if the circuit is open.

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.

Check the capacitor.
Replace if not within ±10% of
manufacturer's rating. Replace if shorted,
open, or damaged.

Check the compressor for open circuit or
ground. If open or grounded, replace the
compressor.

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

Check defrost control, replace it.
Turn dehumidifier off.
Move dehumidifier to obtain free and

unobstructed air circulation.
Clean evaporator and/or condenser assembly
Clean it.
Check Motor, repair or replace it.

—17—

—18—

CONDITION

5. Noisy operating

6. Water drips

7. Compressor cycles on overload
protector. (O.L.P.)

CAUSE

Fan

Some material plunged and rattle.
Tube hits frame.
Fan blade hits frame
Internal compressor noise.
Loose set screws
Worn bearings of Motor Assembly

The bucket is not installed properly.

Connection may be loose.
Leak in bucket
Water drips when bucket removed for

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

Poor air circulation.

Heat Exchange clogged with dust or dirt.
Motor

Bad P.T.C. assembly (if assembled)
Short circuit or ground in electrical circuit
Unit pressures not equalized

Capacitor
Wiring

Refrigeration system
Stuck compressor
Overload protector (O.L.P.)

REMEDY

If cracked, out of balance, or partially
missing, replace it

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.

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

Check connection and repair.
Replace bucket.
Before removing bucket, the unit should

be turned off.
Check micro switch and float.
Check line voltage. It must be between

103.5V and 126.5V volts.
If intermittent, provide new supply.

Move dehumidifier for free and
unobstructed air flow.

Clean dust or dirt on the Heat Exchange.
If not running, determine the cause.

Replace if required.
Check P.T.C., Repair.
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 O.L.P., if externally mounted.

Replace if open. (If the compressor
temperature is high, remove the O.L.P.,
cool, and retest.)

5. EXPLODED VIEW - INTRODUCTION

• MODEL: D30A

—19—

268714

336610

336600

359012

349480 346811

354210

667482

558511

35211A 352113

552111

349600

554030

550140 554160 567502

148380

135500

436500

330870

266011

130411 152302

130910

144410

264110

249950

162615

131110

235512

268712

238310

—20—

• MODEL: D40A

W0CZZ

268714

336610

336600

359012

349480 346811

354210

35211A 352113

349600

554030

148380

235512 135500

436500

330870

266011

130411 152302

130910

144410

264110

249950

162615

131110

550140

567502

554160

552111

238310

268712

—21—

• MODEL: D50A

336610

336600

359012

349480 346811

354210

35211A

349600

554030

148380

235512 135500

436500

330870

266011

130411 152302

130910

144410

249950

162615

131110

W0CZZ

268714

264110

352111

552113

567502

554160

550140

238310

268712

—22—

• MODEL: D65A

336610

336600

359012

349480 346811

354210

35211A

349600

554030

148380

235512 135500

436500

330870

266011

130411 152302

130910

144410

249950

162615

131110

W0CZZ

268714

264110

567502

552111

352113

554160

550140

238310

268712

—23—

6. REPLACEMENT PARTS LIST

• MODEL: D30A

130411 BASE ASSEMBLY, SELD(SINGLE) 3041A10028C
130910 CABINET ASSEMBLY, SINGLE 3091A20015D
131110 CASE ASSEMBLY, SINGLE 3111A10016F
330870 DRAIN PAN ASSEMBLY 3087A10011B
148380 TANK, ASSEMBLY, BUCKET 4839A10001D
152302 FILTER(MECH), AIR 5230A20026A
162615 SENSOR ASSEMBLY 6877A30013H
249950 CONTROL BOX ASSEMBLY 4995A10074F
264110 POWER CORD ASSEMBLY 6411A20001Y
266011 SWITCH ASSEMBLY, MICRO 6600A30003C
268712 PWB(PCB) ASSEMBLY, DISPLAY 6871A20279A
268714 PWB(PCB) ASSEMBLY, MAIN 6871A20162K
346811 MOTOR ASSEMBLY, SINGLE 4681A20040E
35211A TUBE ASSEMBLY, SUCTION SINGLE 5211A20812A
352113 TUBE, DISCHARGE 5210A21843A
354210 EVAPORATOR ASSEMBLY 5421A20131A
336600 HOUSING ASSEMBLY 3660A10003A
550140 ISOLATOR, COMP 5040AR4195A
552111 TUBE ASSEMBLY, CAPILLARY 5211A20814A
554030 CONDENSER ASSEMBLY 5403A20110A
554160 RE-COMPRESSOR, SET 2521C-A8626
359012 FAN, TURBO 5900A20032A
567502 O.L.P 6750C-0009E
349600 MOUNT, MOTOR 4960A20009A
667482 P.T.C, ASSEMBLY 6748C-0003D
135500 COVER(TOP) 3550A20162A
436500 HANDLE 3650A20003A
144410 CASTER ASSEMBLY, ROLLER 4441A30001B
238310 ESCUTCHEON 3831A20051C
235512 COVER, ASSEMBLY, DISPLAY 3551A10024A
349480 ORIFICE 4948A10023A
336610 HOUSING ASSEMBLY, SINGLE 3661A10019A
558511 DRIER ASSEMBLY 5851A30001A

REMARK

LOCATION

NO.

DESCRIPTION

PART NO.

D30A

—24—

• MODEL: D40A

130411 BASE ASSEMBLY, WELD(SINGLE) 3041A10028A
130910 CABINET ASSEMBLY, SINGLE 3091A20015B
131100 CASE ASSEMBLY, SINGLE 3111A10016B
330870 DRAIN PAN ASSEMBLY 3087A10011A
148380 TANK ASSEMBLY, BUCKET 4839A10001D
152302 FILTER(MECH), AIR 5230A20026A
162615 SENSOR ASSEMBLY 6877A30013H
W0CZZ CAPACITOR 0CZZA20003D
249950 CONTROL BOX ASSEMBLY 4995A10074G
264110 POWER CORD ASSEMBLY 6411A20001Y
266011 SWITCH ASSEMBLY, MICRO 6600A30003C
268712 PWB(PCB) ASSEMBLY, DISPLAY 6871A20279A
268714 PWB(PCB) ASSEMBLY, MAIN 6871A20162L
346811 MOTOR ASSEMBLY, SINGLE 4681A20040E
35211A TUBE ASSEMBLY, SUCTION SINGLE 5211A20781A
352113 TUBE ASSEMBLY, DISCHARGE SINGLE 5211A20780A
354210 EVAPORATOR ASSEMBLY 5421A20131A
336600 HOUSING ASSEMBLY 3660A10003A
550140 BUSHING 4830A30005A
552111 TUBE ASSEMBLY, CAPILLARY 5211A20789A
554030 CONDENSER ASSEMBLY 5403A20114A
554160 COMPRESSOR, SET 5416A90009A
359012 FAN, TURBO 5900A20032A
567502 O.L.P, ASSEMBLY 6751A20001F
349600 MOUNT, MOTOR 4960A20009A
135500 COVER (TOP) 3550A20162A
436500 HANDLE 3650A20003A
144410 CASTER ASSEMBLY, ROLLER 4441A30001B
238310 ESCUTCHEON 3831A20051C
235512 COVER ASSEMBLY, DISPLAY 3551A10024A
349480 ORIFICE 4948A10023A
336610 HOUSING ASSEMBLY, SINGLE 3661A10019A

REMARK

LOCATION

NO.

DESCRIPTION

PART NO.

D40A

—25—

• MODEL: D50A

130411 BASE ASSEMBLY, WELD(SINGLE) 3041A10028B
130910 CABINET ASSEMBLY, SINGLE 3091A20015F
131110 CASE ASSEMBLY, SINGLE 3111A10016C
330870 DRAIN PAN ASSEMBLY 3087A10011C
148380 TANK ASSEMBLY, BUCKET 4839A10001E
152302 FILTER(MECH), AIR 5230A20026A
162615 SENSOR ASSEMBLY 6877A30013H
W0CZZ CAPACITOR 0CZZA20001R
249950 CONTROL BOX ASSEMBLY 4995A10074H
264110 POWER CORD ASSEMBLY 6411A20001Z
266011 SWITCH ASSEMBLY, MICRO 6600A30003C
268712 PWB(PCB) ASSEMBLY, DISPLAY 6871A20279A
268714 PWB(PCB) ASSEMBLY, MAIN 6871A20162K
346811 MOTOR ASSEMBLY, SINGLE 4681A20040E
35211A TUBE ASSEMBLY, SUCTION SINGLE 5211A20875A
352113 TUBE ASSEMBLY, DISCHARGE SINGLE 5211A20934A
354210 EVAPORATOR ASSEMBLY 5421A20133A
336600 HOUSING ASSEMBLY 3660A10003A
550140 BUSHING 4830A30005A
552111 TUBE ASSEMBLY, CAPILLARY 5211A20933A
554030 CONDENSER ASSEMBLY 5403A20114B
554160 COMPRESSOR, SET 2520UCDA003
359012 FAN, TURBO 5900A20032A
567502 O.L.P 6750U-L058A
349600 MOUNT, MOTOR 4960A20009A
135500 COVER(TOP) ASSEMBLY 3551A20096A
436500 HANDLE 3650A20003A
144410 CASTER ASSEMBLY, ROLLER 4441A30001B
238310 ESCUTCHEON 3831A20051C
235512 COVER ASSEMBLY, DISPLAY 3551A10024A
349480 ORIFICE 4948A10023A
336610 HOUSING ASSEMBLY, SINGLE 3661A10019A

REMARK

LOCATION

NO.

DESCRIPTION

PART NO.

D50A

—26—

• MODEL: D65A

130411 BASE ASSEMBLY, WELD(SINGLE) 3041A10028B
130910 CABINET ASSEMBLY, SINGLE 3091A20015F
131110 CASE ASSEMBLY, SINGLE 3111A10016C
330870 DRAIN PAN ASSEMBLY 3087A10011C
148380 TANK ASSEMBLY, BUCKET 4839A10001E
152302 FILTER(MECH), AIR 5230A20026A
162615 SENSOR ASSEMBLY 6877A30013H
W0CZZ CAPACITOR 6120AR2359V
249950 CONTROL BOX ASSEMBLY 4995A10074D
264110 POWER CORD ASSEMBLY 6411A20001Z
266011 SWITCH ASSEMBLY, MICRO 6600A30003C
268712 PWB(PCB) ASSEMBLY, DISPLAY 6871A20279A
268714 PWB(PCB) ASSEMBLY, MAIN 6871A20162E
346811 MOTOR ASSEMBLY, SINGLE 4681A20040E
35211A TUBE ASSEMBLY, SUCTION SINGLE 5211A20869A
352113 TUBE ASSEMBLY, DISCHARGE SINGLE 5211A20931A
354210 EVAPORATOR ASSEMBLY 5421A10033A
336600 HOUSING ASSEMBLY 3660A10003A
550140 BUSHING 4830A30005A
552111 TUBE ASSEMBLY, CAPILLARY 5211A20930A
554030 CONDENSER ASSEMBLY 5403A20114B
554160 COMPRESSOR, SET 2520UCDA004
359012 FAN, TURBO 5900A20032A
567502 O.L.P 6750U-L048A
349600 MOUNT, MOTOR 4960A20009A
135500 COVER (TOP) ASSEMBLY 3551A20096A
436500 HANDLE 3650A20003A
144410 CASTER ASSEMBLY, ROLLER 4441A30001B
238310 ESCUTCHEON 3831A20051C
235512 COVER ASSEMBLY, DISPLAY 3551A10024A
349480 ORIFICE 4948A10023A
336610 HOUSING ASSEMBLY, SINGLE 3661A10019A

REMARK

LOCATION

NO.

DESCRIPTION

PART NO.

D65A

D30A / D40A / D50 / 65A (03/03)Printed in the U.S.A

Post Office Box 1540 • 4200 N. Pan Am Expressway • San Antonio, Texas 78295-1540

• [phone] • FAX [phone]

FRIEDRICH AIR CONDITIONING CO.

Visit our web site at www.friedrich.com

P/NO.:3828A20090N

Use Factory Certified Parts...