Koldfront WAC8002WCO User manual

EdgeStar, 8606 Wall St, Suite 1800, Austin, TX 78754
support.edgestar.com • [email protected] • edgestar.com
*Warrantyserviceshouldbeperformedbyanauthorizedservicerepresentativeonly.
SERVICE MANUAL
Koldfront Cool OnlyWindowAir Conditioner
MODELS COVERED:
WAC8002WCO
WAC10002WCO
WAC12002WCO
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 WAC8002WCO.................................................................................................................................... 5
1.2 WAC10002WCO.................................................................................................................................. 7
1.3 WAC12002WCO.................................................................................................................................. 9
1.4 DIMENSIONS.....................................................................................................................................11
2 WIRING DIAGRAM (ALL MODELS)............................................................................................................12
3 MAIN COMPONENTS................................................................................................................................ 13
3.1 MAJOR PARTS ...................................................................................................................................13
3.3 SENSOR AND DISPLAY CONNECTIONS ON MAIN PCB ......................................................................13
4 OPERATING INSTRUCTIONS .....................................................................................................................14
4.1 DISPLAY PANEL CONTROLS............................................................................................................... 14
4.2 REMOTE CONTROLS..........................................................................................................................16
5 INSTALLATION AND CLEANING ................................................................................................................17
5.1 PROPER INSTALLATION AND DRAINAGE ..........................................................................................17
5.2 CLEANING THE FILTER.......................................................................................................................18
6 MODES AND OPERATING CONDITIONS ...................................................................................................19
6.1 TERMS AND DEFINITIONS................................................................................................................. 19
6.2 PROTECTION FUNCTIONS .................................................................................................................19
6.3 AUTO MODE .....................................................................................................................................19
6.4 FAN-ONLY MODE.............................................................................................................................. 20
6.5 DRY MODE ........................................................................................................................................20
6.6 COOLING MODE................................................................................................................................20
6.7 AUTO-DEFROST FUNCTION...............................................................................................................21
6.8 SLEEP MODE .....................................................................................................................................21
7 TROUBLESHOOTING.................................................................................................................................22
7.1 TROUBLESHOOTING GUIDE ..............................................................................................................22
7.2 ERROR CODES AND SENSOR MALFUNCTIONS..................................................................................23
7.3 TEMPERATURE SENSOR RESISTANCE TEST TABLE............................................................................24

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 WAC8002WCO

6
No.
Part Name
No.
Part Name
1
Front panel assembly
14
Fan motor
1.1
Front panel
15
Fan housing
1.2
Air outlet frame
16
Left pulling rod of fan motor
1.4
Panel frame
17
Right puling rod of fan motor
1.5
Vertical vane I
18
Centrifugal fan
1.6
Louver holder
20
Volute shell assembly
1.7
Vertical vane II
20.1
Mid volute shell
1.8
Display box assembly
20.2
Top volute shell
2
Evaporator assembly
22
Electronic control box assembly
3
Compressor
22.2
Electronic control box
4
Condenser assembly
22.3
Main control board subassembly
5
Installation accessories
22.4
Room temperature sensor
7
Cabinet assembly
22.5
Capacitor
8
Upper shutter frame Assembly
22.6
Power supply cord
9
Chassis assembly
23
Cover of electronic control box
11
Parts of compressor return pipe
24
Remote control
12
Compressor exhaust pipe
25
Filter
13
Axial fan

7
1.2 WAC10002WCO

8
No.
Part Name
No.
Part Name
1
Panel assembly
17
Fan housing
1.1
Front panel
18
Axial fan
1.2
Panel frame
19
Fan motor
1.2.1
Horizontal louver
21
Parts of compressor return pipe
1.2.2
Panel frame
22
Compressor
1.2.3
Connecting rod of louver
23
Parts of compressor exhaust pipe
1.2.4
Horizontal louver
24
Evaporator assembly
1.2.5
Horizontal louver
24.1
Evaporator
2
Filter
24.2
Capillary tube assembly
3
Remote control
25
Condenser assembly
7
Subassembly of upper air-out
26
Chassis assembly
7.3
Room temperature sensor
28
Upper shutter frame
7.5
Power supply cord
29
Shell
7.6
Main control board subassembly
30
Installation accessories
7.10
Electrical control box cover
30.1
Left shutter frame
8
Electrical box subassembly
30.2
Shutter
8.1
Electrical control box
30.4
Right shutter frame
8.2
Capacitor
30.6
Shutter clamp
8.3
Capacitor clamp
30.7
Installing L plate
9
Guide bracket
30.9
Shutter
10
Fresh air door
32
Display box assembly
11
Centrifugal fan
32.1
VLED display module
12
Lower air duct foam
32.2
Control panel
13
Foam of middle air channel
37
Installation accessory
14
Wind baffle board
37.1
Sponge
15
Upper air duct foam

9
1.3 WAC12002WCO

10
No.
Part Name
No.
Part Name
1
Panel assembly
19
Fan motor
1.1
Front panel
21
Suction pipe
1.2
Panel frame
22
Compressor
1.2.1
Horizontal louver
23
Parts of compressor exhaust pipe
1.2.2
Panel frame
24
Evaporator assembly
1.2.3
Connecting rod of louver
24.1
Evaporator
1.2.4
Horizontal louver
24.2
Capillary tube assembly
1.2.5
Horizontal louver
25
Condenser assembly
2
Filter
26
Chassis assembly
3
Remote control
28
Upper shutter frame
7
Electronic control box assembly
29
Shell
7.3
Room temperature sensor
30
Installation accessories
7.5
Power supply cord
30.1
Left shutter frame
7.6
Main control board subassembly
30.2
Shutter
7.7
Electronic control box
30.4
Right shutter frame
7.8
Capacitor
30.6
Shutter clamp
10
Fresh air door
30.7
Installing L plate
11
Centrifugal fan
30.9
Shutter
12
Volute shell (below)
32
Display box assembly
15
Volute shell assembly
32.1
Display board assembly
15.1
Upper volute shell
32.2
Control panel
15.2
Wind baffle board
36
Cover of electronic control box
15.3
Mid volute shell
37
Installation accessories
15.4
Bracket of fresh air door
37.1
Sponge
17
Fan housing
38
Fixing board
18
Axial fan
39
Fixing board

11
1.4 Dimensions
Width
Height
Depth
WAC8002WCO
18-1/2” (471 mm)
13-3/8” (340 mm)
17-1/2” (444 mm)
WAC10002WCO
WAC12002WCO
19” (482 mm)
14-5/8” (372 mm)
21-1/2” (545 mm)

12
2 Wiring Diagram (All Models)

13
3 Main Components
3.1 Major Parts
3.2 Electronic Control Box and Main PCB
3.3 Sensor and Display Connections on Main PCB
All sensor connections are clearly marked on the PCB (Room, Def) and are located near the display
ribbon cable connection. Refer to this diagram when troubleshooting unit display issues or sensor error
codes.

14
4 Operating Instructions
4.1 Display Panel Controls
On-Off Button
Press to turn on or off the unit.
NOTE: The Energy Saver feature will automatically turn on in Cool, Dry, and Auto modes.
Temp Button
Press or hold either Up or Down button until desired temperature is seen on the digital display.
This temperature will be automatically maintained anywhere between 62 °F (17° C) and 86° F (30° C).
Pressing and holding both Up and Down buttons for 3 seconds, will change the display from ℉to ℃.
Mode select Button
To choose the operating mode press Mode . Each time you press the button a mode is selected in a
sequence that goes from Auto, Cool, Dry, to Fan. The indicator light beside the mode button will be
illuminated and remain on once the mode is selected.
NOTE: The unit will automatically turn on the Energy Saver function under Cool, Dry, Auto.
Fan speed Button
To select the speed of the fan press Fan Speed which cycles through four steps- Auto, Low,
Medium, or High. Each time the button is pressed the fan speed mode is shifted.
NOTE: The fan speed cannot be adjusted during “Dry” mode.

15
Timer Button
When the unit is on or off, press the Timer button and the “Timer On” indicator light
illuminates. It indicates that the Auto Start/Stop program is initiated.
To switch to off press the Timer button again and the “Timer Off” indicator light illuminates. It
indicates that the Auto Stop program is initiated.
Press or hold the Up or Down button to change the Auto Time by ½ hour increments up to
10 hours or 1 hour increments up to 24 hours. The control will count down the time remaining
until start.
The selected time will display for five (5) seconds and then will automatically revert back to
display the previous temperature setting or room temperature when the unit is on.
Turning the unit ON or OFF at any time or adjusting the timer setting to 0.0 will cancel the Auto
Start/Stop program.
The timer is not a permanent setting. The user must set the timer each they wish to use it.
Sleep Button
To initiate, press the Sleep button. In this mode the selected temperature will increase by 2°F (1°C)
30 minutes after the mode is selected. The temperature will then increase by another 2°F (1°C) after an
additional 30 minutes. This new temperature will be maintained for 6 hours before it returns to the
originally selected temperature. This ends the Sleep mode and the unit will continue to operate as
originally programmed. The Sleep Mode program can be cancelled at any time during operation by again
pressing the Sleep button.
Energy Saver Button
To start the Energy Saver feature, press the Energy Saver button. This feature is available on Cool,
Dry, and Auto. The fan continues to run for 3 minutes after the compressor shuts off. The fan then cycles
on for 2 minutes at 10 minute intervals until the room temperature is above the set temperature, at which
point the compressor turns back on and cooling starts.
Check Filter Button
This 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, simply press the Check Filter button
and the light will go off.

16
4.2 Remote Controls
The remote control has an operating range of 16 ft. from the appliance.
The remote signal receiver/sensor is located on the control panel of the air conditioner.
Reception of signal commands is confirmed by an audible beep.
Direct sunlight can interfere with the infrared signal.
To replace batteries, remove the back cover by pressing where indicated and sliding off the
battery cover.

17
5 Installation and Cleaning
5.1 Proper Installation and Drainage
Older Koldfront window air conditioners included a drain plug that could be removed to assist with water
drainage in excessively humid operating environments. Current models DO NOT use drain plugs. WAC
series air conditioners were modified to increase unit operating efficiency and as a result the drain hole
and plug have been removed.
As water builds up towards the rear / back of the unit the fan blade will begin to splash and disperse that
water over the condenser coils which significantly aids in cooling the internal components and increases
the overall efficiency of the unit. If there is an over-accumulation of water, it will simply drain out of the
lower back edge of the unit onto the exterior ground. Provided that the unit has been installed properly
with a slight rearward slope as indicated below, there will not be drainage issues with the unit.
Service Note: Check that the air conditioner is tilted about 3° to 4° downward toward the outside. After
proper installation, water from the coils should not drain from the unit during normal use. Correct the
slope if necessary.

18
5.2 Cleaning the Filter
In order to maintain energy efficiency and prolong the life of the unit the air filter should be checked at
least once a month to see if cleaning is necessary. In addition, trapped particles in the filter can quickly
build up and cause frost on the evaporator.
Open the front panel.
Take the filter by the center and pull up and out.
Wash the filter using liquid dishwashing detergent and warm water. Rinse filter thoroughly. Gently
shake excess water from the filter. Be sure the filter is thoroughly dry before replacing.
You may also gently use a vacuum to clean the filter.
Reinstall the air filter once it’s clean and dry.
Service Note:
Never use hot water over 104℉(40℃) to clean the air filter.
Never attempt to operate the unit without the air filter.
The air filter should be checked at least once a month to see if cleaning is necessary.
When the check filter light comes on clean the filter. It will be prolong the life of the unit and save
energy.
When the AC has not used for a for a prolonged period of time clean the filter before re-use.

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6 Modes and Operating Conditions
6.1 Terms and Definitions
TA: Temperature of indoor ambient.
TE: Temperature of evaporator.
TS: The set temperature.
DAHT: Heater sensor.
6.2 Protection Functions
The compressor restart protection has a delay of 3 minutes.
Sensor protection against an open or short circuit.
6.3 Auto Mode
AUTO Mode is a setting that allows the unit to automatically switch between COOL and FAN in order
to achieve and maintain the desired set temperature.
In Auto mode the unit will choose cooling or fan-only mode based on ΔT(ΔT=TA-TS)
ΔT = TA - TS
Running mode
ΔT ＞4F
Cooling
-2F ≤ ΔT ≤ 4F
Fan-only
The unit will default to running mode when in auto mode under the following circumstances:
Powering on, changing mode to auto mode or adjusting temperature in auto mode will cause the
unit to default to running mode again.
A: In auto mode, if the compressor does not run for 15 minutes check condition B.
B: If ΔT<-8℉or ΔT ＞2℉, the unit will default to running mode again according to ΔT until the
compressor stops.