GE AJEH 12 DCB Technical Service Manual

1

Models/Tech Data Sheet Location

Grille/Filter Removal

Vent Control - PC Board Service

Blower and Fan Service

Capacitors

2

3

5

6,7

8

Table of Contents

9

10

Cool Only (non-electronic) Wiring Diagram/Schematic

Heat / Cool Wiring Diagram/Schematic

11

115V Cool Only Fast Moving Parts

12

Fan Operation Adjustment

Temperature Limiting Switches

Power Supply

4

115V Current/Differential Temperature Check

Heat Pump Wiring Diagram/Schematic

230/208V Current/Differential Temperature Check

13

230/208V Current/Differential Temperature Check

14

15

16

Cool Only Non-Electronic Fast Moving Parts

17

Cool Only Electronic Fast Moving Parts

18

19

20

21

22

115V Heat / Cool Fast Moving Parts

230/208 Heat / Cool Fast Moving Parts

115V/230V/208V Heat Pump Fast Moving Parts

Warranty

Notes

Cool Only (electronic) Wiring Diagram/Schematic

2

2004 ROOM AIR CONDITIONER

CAUTION! Before servicing any air conditioner, it is important to use hand and arm

protection, such as Kevlar

®

gloves and Kevlar

®

arm guards, to protect against sharp

edges and potential cuts and lacerations.

WARNING! To avoid personal injury, disconnect power before servicing this product.

If electrical power is required for diagnosis or test purposes, disconnect the power imme-

diately after performing the necessary checks.

RECONNECT ALL GROUNDING DEVICES

If grounding wires, screws, straps, clips, nuts, or washers used to complete a path to

ground are removed for service, they must be returned to their original position and

properly fastened.

!

Three New Model Series (Cool Only, Heat/Cool, Heat Pump)

New 26” ROOM AIR Conditioners are being introduced. The line-up includes COOL ONLY, HEAT

PUMP, AND HEAT/COOL models. This bulletin will introduce those models with examples from

electro-mechanical and electronic remote units. Basic disassembly for grille, blower, outdoor fan, and

dryer are the same. Model specific temperature charts, wiring diagrams, and other important product

information is located in the Tech Data sheet shipped with each air conditioner. Depending on model

and size, the air conditioner may have a power supply of 110, 208, or 230 Volts.

COOL ONLY

AJCH 08, 10 ACB

AJCH 10, 12 DCB

AJCQ 08, 10 ACB

AJCQ 10, 12 DCB

AJCS 06 LCB

AJCS 08,10 ACB

AJCS 09,10,12 DCB

HEAT/COOL

AJEH 12 DCB

AJES 06 LSB

AJES 08 ASB

AJES 09,10,12 DCB

AJES 10 DCB

HEAT PUMP

AJHS 08 ASB

AJHS 08,10 DCB

Models:

TECHNICAL DATA SHEET is

located in a plastic bag taped to the

front right side of the case, and is

accessed by removing the front grille.

See page 2 of this bulletin for

instructions on removing front grille.

3

GRILLE REMOVAL

Component Access:

Control components can be accessed by remov-

ing the Front Cover. The unit must be removed

from the case to access fans and refrigerant

components.

To Remove Grille:

1. Remove Filter and two screws.

2. Grasp cover at bottom and

pull forward and lift up.

3. Pull the grille out from the bottom

and lift up from the tabs at the

top of the case.

To Replace Grille:

1. Hook the tabs on the front grille even with

the tabs on the case and snap into place.

2. Replace the screws and filter.

YLPPUSREWOP

EGATLOVDETARSTIMILEGATLOV

511721-301

802/032352-781

MAXIMUM CURRENT LEAKAGE:

0.5 MILLIAMP

MAXIMUM GROUND PATH RESISTANCE:

0.1 OHM

ALL MODELS

POWER SUPPLY AND CURRENT

LEAKAGE:

4

The Fan operation can be set either for continous operation or cycle. The unit comes preset from the

factory for continous operation.

To change the setting:

Insert small screwdriver through the hole in the control cover and slide

the switch down for the fan to cycle, or up for continuous operation.

Fan Adjustment

Hole

Temperature Limiting Setting

Touch Pad Models:

The maximum and minimum cool setting can be

adjusted by resetting a dip switch located on the

top of the control.

Models with Thermostat Knob:

To adjust the maximum and minimum setting,

remove the thermostat knob and reposition

screws to obtain the desired range. The range of

the temperature control is approximately 60

0

F to

85

0

F. Changing the screw locations limits the

rotation of the knob. Each hole location represents

approximately 3

0

F.

FAN OPERATION ADJUSTMENT

CONT

CYCLE

When set at CYCLE (down) the fan

cycles on and off when heating and

cooling. When set at CONT (continous,

up) the fan runs all the time. Air condi-

tioner is shipped in the CONT setting.

(EDOMLOOCGNIRUDGNITIMILERUTAREPMET

0

)F

PUNWODMUMINIMMUMIXAM

ENON3,2,106

0

58

0

13,246

0

58

0

2,13 66

0

58

0

23,186

0

58

0

3,.21 07

0

58

0

3,2,1ENON27

0

58

0

3,12 47

0

58

0

32,167

0

58

0

5

VENT CONTROL

Vent control is located behind the front grille on the right side of the air discharge area. When set to

CLOSE, only the air inside the room will be circulated and conditioned. When set to OPEN, some

inside air is exhausted to the outside. The air conditioner is shipped with the vent CLOSED.

To Open or Close the Vent:

1. Remove the front Grille.

2. Remove the vent card screw.

3. Remove vent card, turn it over and replace

it by locating rear hole in card over locat-

ing pin inside air discharge and reattaching

screw at front.

NOTE:

Without removing unit from window and with the

Grille removed, you can service the control as-

sembly, thermostats, circuit board, run capacitor,

and temperature sensor.

To Service PC Board (electronic):

1. Remove PC Board Cover with 2 Phillips head

screws.

2. Remove 1 Phillips head shoulder bolt mounting

control panel to control enclosure.

SHOULDER BOLT

2 SCREWS

To Remove PC Board (electronic):

1. Remove 2 Phillips screws mounting control

transformer to plastic housing.

2. Unplug wiring harness from PC board connec

tors (note harness to connector location),

CN2, CN1, CN4.

3. Unplug terminal connectors:

T1 White

T2 Orange

T3 Red

T5 Blue

T4 Black- Indoor fan motor

NOTE: Teminal ends are locking tabs. To remove,

use needle nose pliers, depress tab in center and

pull off wiring in the same motion.

6

BLOWER AND FAN SERVICE

The air conditioner will have to be removed from the window to service the indoor blower/motor and the

outdoor fan/motor.

To Service Blower Fan:

In order to access the fan and motor, you must

diasassemble the spacer plastic fan housing.

1. With front grille removed, cut foam gasket

on both sides of louver assembly. Remove

two screws and lift out assembly.

2. Remove two screws and two ground

wires. Lift out metal blower fan housing.

3. Remove spacer bracket to remove plastic

housing for motor access.

REMOVE SPACER BRACKET

LIFT OUT METAL BLOWER HOUSING

REMOVE HOUSING SIDE

BLOWER FAN

5/16” NUT

LOUVER ASSEMBLY

REMOVE LOUVER ASSEMBLY

7

4. Remove 4 Phillips head screws that

mount plastic housing sides to coil hous-

ing.

BLOWER AND FAN SERVICE (Cont’d.)

5. Remove 4 Phillips head screws that

mount coil housing to bracket.

4. Remove 4 Phillips head screws that

mount motor to fan bracket.

REMOVE SIDES

REMOVE COIL HOUSING

REMOVE OUTSIDE FAN BLADE

OUTSIDE FAN

MOTOR

5/16” NUT

NOTE: In order to service inside blower/outside

fan and motors, you will have to disassemble to

this point. Both blower/fan are mounted with a

5/16” nut.

INSIDE FAN MOTOR

8

CAPACITORS

The electronic air conditioner has 3 start/run

capacitors - one for each fan (blower/fan) and

compressor. They are accessed by removing the

grille, front pc board cover as previously de-

scribed. Technicians will have full access to the

capacitors with the pc board cover removed.

OUTDOOR FAN START/RUN CAPACITOR

BLOWER FAN START/RUN CAPACITOR

COMPRESSOR START/RUN CAPACITOR

NOTE: Compressor capacitor has a snap-in

bracket to hold it in place.

NOTE:

Refer to the Technical Data Sheet for the most current information available regarding

individual models. Adhere to all safety warnings and cautions cited in the Technical Data

Sheet.

9

10

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12

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GE AJEH 12 DCB Technical Service Manual

GE AJEH 12 DCB Technical Service Manual

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