Koldfront WTC10002WCO115V, WTC12002WCO115V, WTC10012WCO230V, WTC12012WCO230V, WTC12001W Service Manual

EdgeStar, 8606 Wall St, Suite 1800, Austin, TX 78754

support.edgestar.com • [e-mail] • edgestar.com

*Warranty service should be performed by an authorized service representative only.

SERVICE MANUAL

Koldfront Through the Wall Air Conditioner

MODELS COVERED:

WTC8001W
WTC12001W
WTC8002WCO
WTC10002WCO115V
WTC10012WCO230V
WTC12002WCO115V
WTC12012WCO230V

WTC14012WCO230V

Document Type: Service Manual
Version: V1.0 04112018

CAUTION: READ ALL SAFETY PRECAUTIONS IN THIS
MANUAL BEFORE SERVICING THE UNIT

1

CONTENTS

CONTENTS ....................................................................................................................................... 1

SAFETY PRECAUTIONS ..................................................................................................................... 2

ELECTRICAL SAFETY ..................................................................................................................... 3

GENERAL SAFETY ......................................................................................................................... 4

1 EXPLODED DIAGRAMS AND PART LISTS ...................................................................................... 5

1.1 WTC8001W AND WTC12001W ............................................................................................. 5

1.2 WTC WCO MODELS ............................................................................................................... 7

1.3 DIMENSIONS ......................................................................................................................... 9

2 WIRING DIAGRAM (ALL MODELS) .............................................................................................. 10

3 MAIN COMPONENTS.................................................................................................................. 11

3.1 MAJOR PARTS ..................................................................................................................... 11

3.2 ELECTRONIC CONTROL BOX AND MAIN PCB ...................................................................... 11

4 UNIT OPERATION ....................................................................................................................... 12

4.1 DISPLAY PANEL CONTROLS ................................................................................................. 12

4.2 REMOTE CONTROL .............................................................................................................. 14

5 INSTALLATION AND CLEANING .................................................................................................. 15

5.1 PROPER INSTALLATION AND DRAINAGE............................................................................. 15

5.2 CLEANING THE FILTER ......................................................................................................... 16

6 MODES AND OPERATING CONDITIONS ..................................................................................... 17

6.1 TERMS AND DEFINITIONS ................................................................................................... 17

6.2 PROTECTION FUNCTIONS ................................................................................................... 17

6.3 AUTO MODE ........................................................................................................................ 17

6.4 FAN-ONLY MODE ................................................................................................................ 17

6.5 COOLING MODE .................................................................................................................. 18

6.6 AUTO-DEFROST FUNCTION ................................................................................................. 18

6.7 DRY MODE ........................................................................................................................... 19

6.8 SLEEP MODE ........................................................................................................................ 19

7 TROUBLESHOOTING ................................................................................................................... 20

7.1 TROUBLESHOOTING GUIDE ................................................................................................ 20

7.2 ERROR CODES AND SENSOR MALFUNCTIONS .................................................................... 21

7.3 TEMPERATURE SENSOR RESISTANCE TEST TABLE .............................................................. 22

2

SAFETY PRECAUTIONS

WARNING: This manual and the information contained herein is intended for use
by certified technicians. The manufacturer or seller is not responsible for the
interpretation or misuse of the information provided, nor does it assume any
liability in connection with its use.

The safeguards and warnings indicated in this manual do not cover all possible
conditions which may occur. Common sense, caution, and care must be
exercised.

 To prevent electric shock, always unplug an appliance from the power supply before attempting

any service.

 Disconnect the power cord by grasping the plug, not the cord.
 Do not bypass, cut, or remove the grounding plug.
 Prevent water from spilling onto electric elements or the machine parts.
 Always refer to the rating label on the appliance for rated current and voltage.
 Always check line voltage and amperage.
 Always use exact replacement parts.
 Any attempt to repair a major appliance may result in personal injury and property damage.

3

Electrical Safety

 Do not exceed the power outlet ratings.
 It is recommended that the unit be connected to its own circuit.
 A standard electrical supply that is properly grounded in accordance with the National Electrical Code

and all state and local codes and ordinances is required.

 Do not use outlets that can be turned off by a switch or pull chain.
 Always turn the unit off and unplug it from the outlet when cleaning.
 Unplug the unit if it is not going to be used for an extended period of time.
 Do not operate the unit with a power plug missing the ground plug, a damaged cord, or a loose socket.
 Be sure the appliance is properly grounded.
 Do not bypass, cut, or remove the grounding plug.
 If the power cord is damaged, it must be replaced by the manufacturer or a qualified technician.
 Do not use extension cords or power strips with this unit. You may need to contact an electrician if it is

necessary to use a longer cord or if you do not have a properly grounded outlet. Do not modify the
power cord’s length or share the outlet with other appliances.

 Do not start or stop the unit by switching the electrical circuit’s power on and off.
 Immediately unplug the unit if it makes strange sounds, emits an odor or smoke and contact customer

service.

 Do not remove any part of the casing unless instructed by an authorized technician.
 Before the appliance is removed from service or discarded, remove any doors and cut off the power

cord.

4

General Safety

 Always unplug an appliance from the power supply before attempting any service. Disconnect the

power cord by grasping the plug, not the cord.

 Do not allow children or pets to play on or in the appliance.
 This machine is not intended for use by persons (including children) with reduced physical, sensory or

mental capabilities, or lack of experience and knowledge, unless they have been given supervision or
instruction concerning use of the machine by a person responsible for their safety.

 Do not install or store this appliance where it will be exposed to the weather.
 Disconnect from the power socket before cleaning or maintenance.
 If the plug (power cord) is damaged, it must be replaced by the manufacturer or an authorized service

representative.

 This machine shall be repaired only by an authorized service representative. Only genuine

replacement parts should be used.

 If connected to a circuit protected by fuses, use time-delay fuses with this appliance.
 Do not lean items against the glass door.
 Please do not close the door with excessive force. If it is found difficult to close the door, please check

for obstruction.

 When you plan to dispose of this unit in the future, please comply with the local waste disposal

regulations. Remove any doors so that children and pets will not be trapped in the unit.

5

1 Exploded Diagrams and Part Lists

1.1 WTC8001W and WTC12001W

6

No.

Part Name

No.

Part Name

1

Display assembly

22

Electric heater

2

Front panel

23

Electronic control box assembly

3

Air outlet assembly

23.1

Capacitor for fan motor

3.1

Air outlet

23.2

Electronic control box

3.2

Horizontal louver

23.3

Transformer

3.3

Connecting rod for louver

23.4

Bracket for main control board

3.4

Horizontal louver

23.5

Main control board assembly

4

Evaporator coil assembly

23.6

Power cord

4.1

Evaporator

23.7

Defrost sensor assembly

4.3

Capillary tube assembly

23.8

Ambient temperature sensor assembly

5

Discharge pipe assembly

23.9

Heater temperature sensor assembly

6

Compressor

23.11

Capacitor for compressor

7

Remote control

24

Cover for electronic control box

9

Condenser

25

Condenser water tray

10

Axial flow fan

26

Chassis assembly

11

Rear separating housing

27

Drain valve

13

Fan motor

28

Grille

14

Front separating housing

29

Grille

15

Cabinet

30

Installation accessories

16

Rear volute shell

30.1

Upper and lower shutter frame

17

Heat insulation

30.2

Left and right shutter frame

18

Centrifugal fan

30.3

Rear grille

19

Front volute shell

30.4

Plastic net

20

Air filter

31

Filter guide

21

Box for electric heater

7

1.2 WTC WCO Models