Friedrich Metal Products EQ08M11A Service Manual
2010
Money
Fan
Set Hr.
Stop
Start
Temperature
Fan
Co
ol
On/
Co
oler
Warmer
On
ly Speed S
av
er
®
Power
Timer Operation
Room Air Conditioners
Service Manual
R-410A Models
Cool Only
115-Volt: XQ05M10A, XQ06M10A, XQ08M10A, XQ10M10A
Cool with Electric Heat
115-Volt: EQ08M11A
X-Star-ServMan (4-10)
Table Of Contents
Important Safety Information .......................................................................................................................................... 2-4
Unit Identication ............................................................................................................................................................... 5
Performance Data ............................................................................................................................................................. 6
Chassis Specications ...................................................................................................................................................... 6
Installation Information/Sleeve Dimensions ...................................................................................................................... 6
Electrical Data ................................................................................................................................................................... 7
Before Operating the Unit ................................................................................................................................................. 8
For Best Cooling Performance and Energy Efciency ...................................................................................................... 8
How to Operate the XQ ..................................................................................................................................................... 9
How to Use the XQ Remote Control ............................................................................................................................... 10
How to Operate the EQ ................................................................................................................................................... 10
Electronic Control Sequence of Operation ...................................................................................................................... 11
Functional Component Denition .................................................................................................................................... 12
Components Testing .................................................................................................................................................. 13-16
Refrigeration Sequence of Operation ............................................................................................................................. 17
R-410A Sealed System Repair Considerations .............................................................................................................. 18
Sealed Refrigeration System Repairs ........................................................................................................................ 19-22
Compressor Checks ................................................................................................................................................... 23-24
Compressor Replacement .......................................................................................................................................... 25-26
Routine Maintenance ................................................................................................................................................. 27-28
Performance Test Data Sheet ......................................................................................................................................... 29
Troubleshooting ......................................................................................................................................................... 30-36
Wiring Diagrams ........................................................................................................................................................ 37-38
Instructions for using Cooling Load Estimate Form ........................................................................................................ 39
Cooling Load Estimate Form ........................................................................................................................................... 40
Heat Load Form ......................................................................................................................................................... 41-42
Warranty .......................................................................................................................................................................... 43
Technical Assistance ....................................................................................................................................................... 44
1
IMPORTANT SAFETY INFORMATION
The information contained in this manual is intended for use by a qualied service technician who is familiar
with the safety procedures required for installation and repair, and who is equipped with the proper tools and
test instruments required to service this product.
Installation or repairs made by unqualied persons can result in subjecting the unqualied person making
such repairs as well as the persons being served by the equipment to hazards resulting in injury or electrical
shock which can be serious or even fatal.
Safety warnings have been placed throughout this manual to alert you to potential hazards that may be
encountered. If you install or perform service on equipment, it is your responsibility to read and obey these
warnings to guard against any bodily injury or property damage which may result to you or others.
We have provided many important safety messages in this manual and on your appliance. Always read
and obey all safety messages.
WARNING
CAUTION
All safety messages will tell you what the potential hazard is, tell you how to reduce the chance of injury,
and tell you what will happen if the instructions are not followed.
NOTICE
Your safety and the safety of others are very important.
This is a Safety Alert symbol.
This symbol alerts you to potential hazards that can kill or hurt you and others.
All safety messages will follow the safety alert symbol with the word “WARNING”
or “CAUTION”. These words mean:
You can be killed or seriously injured if you do not follow instructions.
You can receive minor or moderate injury if you do not follow instructions.
A message to alert you of potential property damage will have the
word “NOTICE”. Potential property damage can occur if instructions
are not followed.
PERSONAL INJURY OR DEATH HAZARDS
ELECTRICAL HAZARDS:
Unplug and/or disconnect all electrical power to the unit before performing inspections, •
maintenance, or service.
Make sure to follow proper lockout/tag out procedures.•
Always work in the company of a qualied assistant if possible. •
Capacitors, even when disconnected from the electrical power source, retain an electrical charge •
potential capable of causing electric shock or electrocution.
Handle, discharge, and test capacitors according to safe, established, standards, and approved •
procedures.
Extreme care, proper judgment, and safety procedures must be exercised if it becomes necessary •
to test or troubleshoot equipment with the power on to the unit.
2
Do not spray or pour water on the return air grille, discharge air grille, evaporator coil, control panel, •
and sleeve on the room side of the air conditioning unit while cleaning.
Electrical component malfunction caused by water could result in electric shock or other electrically •
unsafe conditions when the power is restored and the unit is turned on, even after the exterior is dry.
Never operate the A/C unit with wet hands.•
Use air conditioner on a single dedicated circuit within the specied amperage rating. •
Use on a properly grounded outlet only.•
Do not remove ground prong of plug.•
Do not cut or modify the power supply cord.•
Do not use extension cords with the unit.•
Follow all safety precautions and use proper and adequate protective safety aids such as: gloves, •
goggles, clothing, adequately insulated tools, and testing equipment etc.
Failure to follow proper safety procedures and/or these warnings can result in serious injury or death. •
REFRIGERATION SYSTEM HAZARDS:
Use approved standard refrigerant recovering procedures and equipment to relieve pressure before •
opening system for repair.
Do not allow liquid refrigerant to contact skin. Direct contact with liquid refrigerant can result in minor •
to moderate injury.
Be extremely careful when using an oxy-acetylene torch. Direct contact with the torch’s ame or hot •
surfaces can cause serious burns.
Make sure to protect personal and surrounding property with re proof materials.•
Have a re extinguisher at hand while using a torch.•
Provide adequate ventilation to vent off toxic fumes, and work with a qualied assistant whenever •
possible.
Always use a pressure regulator when using dry nitrogen to test the sealed refrigeration system for •
leaks, ushing etc.
Make sure to follow all safety precautions and to use proper protective safety aids such as: gloves, •
safety glasses, clothing etc.
Failure to follow proper safety procedures and/or these warnings can result in serious injury or death. •
MECHANICAL HAZARDS:
Extreme care, proper judgment and all safety procedures must be followed when testing, •
troubleshooting, handling, or working around unit with moving and/or rotating parts.
Be careful when, handling and working around exposed edges and corners of sleeve, chassis, and •
other unit components especially the sharp ns of the indoor and outdoor coils.
Use proper and adequate protective aids such as: gloves, clothing, safety glasses etc.•
Failure to follow proper safety procedures and/or these warnings can result in serious injury or death.•
3
PROPERTY DAMAGE HAZARDS
FIRE DAMAGE HAZARDS:
Read the Installation/Operation Manual for this air conditioning unit prior to operating.•
Use air conditioner on a single dedicated circuit within the specied amperage rating. •
Connect to a properly grounded outlet only.•
Do not remove ground prong of plug.•
Do not cut or modify the power supply cord.•
Do not use extension cords with the unit.•
Failure to follow these instructions can result in re and minor to serious property damage.•
WATER DAMAGE HAZARDS:
Improper installation maintenance, or servicing of the air conditioner unit, or not following the above •
Safety Warnings can result in water damage to personal items or property.
Insure that the unit has a sufcient pitch to the outside to allow water to drain from the unit. •
Do not drill holes in the bottom of the drain pan or the underside of the unit. •
Failure to follow these instructions can result in result in damage to the unit and/or minor to serious •
property damage.
INTRODUCTION
This service manual is designed to be used in conjunction with the operation and installation manual provided
with each unit.
This service manual was written to assist the professional HVAC service technician to quickly and accurately
diagnose and repair any malfunctions of this product.
This manual, therefore, will deal with all subjects in a general nature. (i.e. All text will pertain to all models).
IMPORTANT:
It will be necessary for you to accurately identify the unit you are
servicing, so you can be certain of a proper diagnosis and repair.
(See Unit Identication.)
Compressor
Liquid Filter Driers
Condenser Coil
Front Cover
System Controls
Evaporator Coil
Return Air Grille/Filter
Blower Wheel
Blower Motor
4
Basepan
Condenser Fan Blade
Discharge Air
Outdoor Grille
Sleeve
UNIT IDENTIFICATION
1st Digit – Function
E = Electric Heat
X = Straight Cool
Model Number Code
X Q 08 M 1 0 A
8th Digit – Engineering
Major change
7th Digit – Options
0 = Straight Cool
1 = 1 KW Heat Strip, Nominal
2nd Digit
Q = Q-Star Chassis Size
3rd and 4th Digit - Approximate
BTU/HR in 1000s (Cooling)
Heating BTU/Hr capacity listed in the
Specication/Performance Data Section
RAC Serial Number Identication Guide
Serial Number
Decade Manufactured
L=0 C=3 F=6 J=9
A=1 D=4 G=7
B=2 E=5 H=8
Year Manufactured
A=1 D=4 G=7 K=0
B=2 E=5 H=8
C=3 F=6 J=9
A K A R 00001
6th Digit – Voltage
1 = 115 Volts
5th Digit
Alphabetical Modier
Production Run Number
Product Line
R = RAC
Month Manufactured
A=Jan D=Apr G=Jul K=Oct
B=Feb E=May H=Aug L=Nov
C=Mar F=Jun J=Sept M=Dec
5
PERFORMANCE DATA
Installation Information / Sleeve Dimensions
* Minimum extensions when mounted in a window.
** Minimum widths achieved using one side cur tain assembly as opposed to both in a standard installation.
Circuit Rating/ Breaker
(B)
(C)
Front
SIDE VIEW
Model
Circui t Rating
Breaker or
T-D Fuse
Plug
Face
(NEMA #)
Power Cord
Length (ft.)
Wall Outlet
Appe arance
XQ05M10A, XQ06M10A,
XQ08M10A, XQ10M10A
EQ08 M11A
7
125V - 15A 5 - 15P 6
Sleeve
Height Width
Depth
with Front
Shell Depth to
Louvers
Minimum
Extension
Into Room*
Minimum
Extension
Outside*
Window Width
Thru-the-wall Installation
Finished Hole
Minimum** Maximum Height Width Max. Depth
Q 14"
19
¾
"
21
3
/8
"
8
½"
5
½"
10
¾"
22" 42" 14 ¼" 20" 8 ½”
All models use
environmentally
friendly R-410A
refrigerant.
R-410A
As an ENERGY STAR
®
partner, Friedrich Air Conditioning Co. has determined that the selected ENERGY STAR® () models
meet the ENERGY STAR
®
Estimated yearly operating cost based on a 2007 national average electricity cost of 10.65 cents per kWh.
† The estimated yearly operating cost of this model was not available at the time the range was published.
Model
Cooling
Capacity Btu
Heating
Capacity Btu
Volts
Rated
Cooling
Amps
Cooling
Watts
Heating
Amps
Heating
Watts COP
Energy
Ratio
EER
Estimated
Yearly
Operating
Cost
Moisture
Removal
Pints/HR
Room Side
Air
Circulation
CFM Sleeve
Net
Weight
Lbs
XStar ®
XQ05M10A 5500 — 115 4.5 491 — — 11.2 $39 1.0 170 Q 72
XQ06M10A 6000 — 115 4.9 500 — — 12.0 † 1.0 175 Q 72
XQ08M10A 7500 — 115 6.9 701 — — 10.7 $56 1.7 175 Q 71
XQ10M10A 9500 — 115 9.0 970 — —
9.8 $56 2.5 180 Q 71
XStar ®
Electric Heat
EQ08M11A 7500 4000 115 6.3 701 11.2 1290 2.8 10.7 $56 1.9 175 Q 72
Window Mounting Kits
Heat/Cool Model s Kit No.
EQ08M11A
WIKQ
Friedrich heat/cool models include accessories for
thru-the-wall installation only. Window mounting requires
use of optional accessory kit as listed above.
Amps
R-410A
REF.
Charge in
OZ.
Voltage
COOLING
PERFORMANCE DATA*
XQ05M10A 57 23 117 133 60 5 19 157 410 4.5 24.0 27.0 11 5 15
XQ06M10A 54 26 120 152 63 12 18 150 410 4.9 25.0 21.0 11 5 15
XQ08M10A 51 29 119 160 63 13 25 138 420 6.3 32.0 25.5 11 5 15
Q-Chassis
XQ10M10A 47 33 131 176 59 12 32 132 490 9.8 57.0 24.0 11 5 15
EQ08M11A 49 31 120 162 60 14 27 133 420 7.0 7.6 32.0 25.5 115 15
EVAP. AIR TEMP. DEG. F
Discharge Air
Temp.
Drop F.
CONDENSER
TEMPERATURE DEG. F
Discharge Temp Suction Temp Super Heat Sub-Cooling
OPERATING PRESSURES ELECTRICAL RATINGS
Suction Discharge Amps Cool Amps Heat
Locked Rotor
*Rating Conditions: 80 degrees F, room air temp. & 50% relative humidity, with 95 degree F, outside air temp & 40% relative humidity, all systems use R410A.
BREAKER FUSE
60 Hertz Amps
6
ELECTRICAL DATA
Not following the above WARNING could result in re or
electically unsafe conditions which could cause moderate
or serious property damage.
Read, understand and follow the above warning.
WARNING
ELECTRIC SHOCK HAZARD
Turn off electric power before service or
installation.
All electrical connections and wiring MUST be
installed by a qualied electrician and conform to
the National Electrical Code and all local codes
which have jurisdiction.
Failure to do so can result in personal injury or
death.
NOTICE
FIRE HAZARD
Wire Size Use ONLY wiring size recommended for single outlet branch circuit.
Fuse/Circuit Breaker Use ONLY the correct HACR type and size fuse/circuit breaker. Read electrical ratings on unit’s
rating plate. Proper circuit protection is the responsibiity of the homeowner.
Grounding Unit MUST be grounded from branch circuit through service cord to unit, or through separate
ground wire provided on permanently connected units. Be sure that branch circuit or general
purpose outlet is grounded.
Receptacle The eld supplied outlet must match plug on service cord and be within reach of service cord.
Do NOT alter the service cord or plug. Do NOT use an extension cord. Refer to the table above
for proper receptacle and fuse type.
The consumer - through the AHAM Room Air Conditioner Certication Program - can
be certain that the AHAM Certication Seal accurately states the unit’s cooling and
heating capacity rating, the amperes and the energy efciency ratio.
*HACR: Heating Air Conditioning and Refrigeration
7
Keep the filter clean
Make sure that your air conditioner is always in top performing condition
.ylralugerretlifehtgninaelcyb
Provide good air flow
Make sure the airflow to and from the unit is clear. Your air conditioner puts the
conditioned air out at the top of the unit, and takes in unconditioned air at the
bottom. Airflow is critical to good operation. It is just as important on the outside
.dekcolbtonsiroiretxetinuehtdnuorawolfri
aehttahtgnidliubehtfo
Unit placement
If your air conditioner can be placed in a window or wall that is shaded by a tree
rosepardgnisU.yltneiciffeeromneveetarepolliwtinueht,gnidliubre hto naro
blinds on the sunny side of the dwelling will also add to your unit’s efficiency.
Insulation
Good insulation will be a big help in maintaining desirable comfort levels.
Doors should have weather stripping. Be sure to caulk around doors and
windows.
Proper installation of schassis eal gasket
Make sure the seal gasket has been installed properly to minimize noise
and improve effi ciency. If the sealchassis gasket has not been installed,
please
refer to Step 14 of the installation instructions.
Also, if you switch from Cool mode to Fan Only, and switch back to
COOL mode, there is a three minute delay before the compressor comes
back on.
For the best cooling performance and highest energy efficiency
WARNING: Before operating unit
Make sure the wiring is adequate for your unit.
If you have fuses, they should be of the time delay type. Before you install
rekaerbtiucricehtfognitaregarepmaehttahteruseb,tinusihtetac olerro
or time delay fuse does not exceed the amp rating listed in Figure 1.
DO NOT use an extension cord.
The cord provided will carry the proper amount of electrical power to the
.tonlliwdrocnois netxena;tinu
Make sure that the receptacle is compatible with
the air conditioner cord plug provided.
This insures proper grounding. If you have a two prong receptacle you
will need to have it replaced with a grounded receptacle by a certifi ed
electrician. The grounded receptacle should meet all national and local
codes and ordinances. Under no circumstances should you remove the
ground prong fro
m the plug. You must use the three prong plug furnished
with the air conditioner.
Test the power cord
All Friedrich room air conditioners are shipped from the factory with a
Leakage Current Detection Interrupter (LCDI) equipped power cord. The
LCDI device meets the UL and NEC requirements for cord connected air
conditioners.
To test your power supply cord:
1. Plug power supply cord into a grounded 3 prong outlet.
2. Press RESET (See Figure 2).
3. Press TEST (listen for
click; Reset button trips and pops out).
4. Press and release RESET (listen for click; Reset button latches and
remains in). The power supply cord is ready for operation.
NOTE: LCDI device is not intended to be used as a switch.
Once plugged in the unit will operate normally without the need to reset
the LCDI device.
If the device fails to trip when tested or if the power supply cord is
damaged it must be replaced with a new supply cord from the manufacturer. We recomm
end you contact our Technical Assistance Line at
(800) 541-6645 ext. 845. To expedite service, please have your model
and serial number available.
MODEL
CIRCUIT RATING
OR TIME DELAY
FUSE
REQUIRED WALL
RECEPTACLE
AMP VOLT
NEMA
NO.
XQ06 • • XQ08 • XQ10
EQ08
XQ05
15 125 5-15R
Figure 2
Figure 1
WARNING
TEST BEFORE EACH USE
1. PRESS RESET BUTTON
2. PLUG LDCI INTO POWER
RECEPTACLE
3. PRESS TEST BUTTON,
RESET BUTTON SHOULD
POP UP
4. PRESS TEST BUTTON,
FOR USE
DO NOT USE IF ABOVE TEST
FAILS
WHEN GREEN LIGHT IS ON
IT IS WORKING PROPERLY
RESET
TEST
NOTE: Your LCDI device will resemble one of these illustrations.
WARNING
ELECTRICAL SHOCK HAZARD
Make sure your electrical receptacle has the same
configuration as your air conditioner’s plug. If
different, consult a Licensed Electrician.
Do not use plug adapters.
Do not use an extension cord.
Do not remove ground prong.
Always plug into a grounded 3 prong outlet.
Failure to follow these instructions can result in
electrical shock, serious injury or death.
8
To startunit
siti,elc at pec erreporpaotnideggulpdnadellatsnisirenoitidnocriaruoyfI
ready togo.The firsttimetheunit is started, thecompressorwilldelay forthree
minutes.See AutomaticComponentProtectiononthe followingpage.
1
Touchthe Powerbutton once.The unitwill automaticallybein Cool
mode with the temperature setat75°F (24°C) andthe fanspeed at
F1, thesleep setting.
To setmodeofoperation
When you rstturnthe uniton, it will be in the Cool mode (lighton),with
constant fan.
2
Touchthe Mode button once to activatethe MoneySaver®(lighton).
MoneySaver
®
ros serp mocehthtiwnafehtselcyctahterutaefasi
so that thefan does notrun allthe time.Thissaves energy and
eromrofnaftnats nocreferpyamuoyrO.noit ac
i dim uh edsevorpmi
ehthcuot,naftnatsnocotnruterot(tnem evomria Mode button two
more times).
In order to runthe fanbyitself, do thefollowing:
3
Continuing fromMoneySaver®mode (lighton), touchthe Modebutton
once to activate the FANONLY feature(lighton).
The FANONLY settingwillcirculate air in the roomwithout thecom-
pressorcomingon.
To adjusttemperature
4
Usethe Mode button to select eitherthe COOL or MoneySaver
®
function
5
COOLER – Touch the button to lower theroomair temperature.
6
WARMER – Touch the button to raisethe roomair temperature.
7
Pressboth the and ehthctiwsotemitemasehttasnottub
temperature readoutfrom Fahrenheit(°F)toCelsius(°C).
Repeat step 7 to switch from °C back to °F.
To adjust fan speed
8
TouchtheFanSpeedbutton to seethe currentsetting. Touchit again
to changespeed. F1isthe lowest setting(SLEEPSETTING/LOW),
F2 is MEDIUM,and F3 is HIGH.
To activate Smart Fan
9
Thereisafourth option,SF, when selectingthe fanspeed.Thisis
the SMARTFAN function.SMART FANDOESNOT OPERATEIN
CONJUCTION WITH THEFAN ONLY MODE.
SmartFan will adjustthe fanspeed automaticallyto maintain the
desiredcomfort level. Forexample,ifthe outsidedoors in your home
are opened foranextended period of time,ormorepeople entera
room,Smart Fanmay adjusttoahigherfan speedtocompensate
forthe increasedheatload. This keepsyou from havingto adjustthe
fanspeed on your own.
Howtooperate the Friedrich room airconditioner (XQmodels)
PM
Temp/Hour
Cool
Money Saver
®
Fan Only
Clock
Start Time
Stop Time
Power
Fan
Speed
Mode
Timer
Set
Hour
10 11 12
13
7
3 4
5
6
18 9 2
Figure 5
To setthe hour clock
10
Touchthe SetHour button to seethe currentsetting (clock light
comeson).The numberthatis displayed is the approximatetime
(hour only).Use the
and
buttonstochange thesettings.BE
SURETO SETA.M.AND P. M. ACCORDINGLY. (P.M.isindicated
by ared lightinthe upperleftcornerofthe display).
To setthe timer
NOTE: Setthe HOUR CLOCK before attempting to settimer functions.
Youcan setthe START and STOP timesaminimumofone hour apart,and
amaximumoftwenty-three hours apart.
11
Aftersetting thetime, press the Set Hour button once (Start light
comeson).Use the
and buttonsto selectthe time that the
unit will START.
12
After selectingthe START time,press the SetHour button once more
(Stoplight comeson).Use the
and buttonsto select thetime
that the unitwill STOP.After selecting the stoppingtime, pressthe
Set Hour button once.
13
Pressthe TimerOn/Off button (light turnson) to activate thetimer
function. To deactivate this function, press the TimerOn/Off button
once again (lightturns off).Oncethe on andoff timeshavebeen
selected,theywillremaininmemory and cycle dailyuntil changed.
NOTE: If the unitisunplugged or thepower is interrupted,the HOUR
mustbereset or the TimerOn/Off will notfunctionwhendesired.
Automatic componentprotection
Your unit is equipped with Automatic Component Protection. To protectthe
compressorofthe unit, thereisathree minutestart delayifyou turn the unit
offorifpoweris interrupted.The fanoperation will notbeaffected. Also,ifyou
switch from Cool mode to Fan Only,and switch back to Cool mode,there
is athree minute delaybeforethe compressor comesbackon.
3 4
Mode
Set
Hour
Cool
Money Saver
Fan Only
Clock
Start Time
Stop Time
PM
Fan
Speed
Timer
On/Off
13
10 11 12
®
18 9 2
X Star
Power
Temp/Hour
5
6
7
Figure 3
9
To set the timer
NOTE: You can set the START and STOP times a minimum of one hour
apart, and a maximum of 23 hours apart.
9
TIMER START - Press Start .gniloocrofemittratstnerrucehtweivot
Continue pressing the Start button until you arrive at the start time
you desire. The start time for cooling will then be set.
10
TIMER STOP - Press the Stop button. Continue pressing the Stop
button until you arrive at the stop time you desire. The stop time for
cooling will then be set.
11
TIMER ON / OFF - Press the On/Off button to activate (light on) or
deactivate (light off) the timer. Once the on and off times have been
selected, they will remain in memory and cycle daily until changed.
NOTE: If the unit is unplugged or the power is interrupted, the Set Hr.
function must be reset or the On/Off function will not work.
How to use the remote control
To start unit
1
POWER - Press the Power button once. The unit will automatically
start in the mode and fan speed it was last left on.
To set mode of operation
2
COOL - Press the Cool button to automatically switch the operating
mode to COOL.
3
FAN ONLY - Press the Fan Only button if you want to run the fan
only.
4
MoneySaver®- Press the MoneySave r®button to activate the
MoneySaver
®
feature. This feature cycles the fan with the compres-
sor so that the fan does not run all the time.
To adjust temperature setting
5
WARMER - Press the Warmer button to raise the temperature
setting.
6
COOLER - Press the Cooler button to lower the temperature
setting.
To adjust fan speed
7
FAN SPEED - Press the Fan Speed button to see the current set-
ting. Press again to change the fan speed. F1 is the lowest setting
(SLEEP / LOW), F2 is MEDIUM, F3 is HIGH, and SF is the SMART
FAN setting.
To set the hour clock
8
SET HOUR CLOCK - Press Set Hr. once to see the current clock
setting. Continue pressing the button until you arrive at the current
time (Hour only). Minutes are not shown on the display. Make sure
that the A.M. / P.M. setting is correct.
Additional RC1 wirelessremote controlscan be purchased from your Friedrich dealer.
(XQ models)
Money
Fan
Set Hr.
Stop
Start
Temperature
Fan
Cool
On/O
Cooler
Warmer
Only Speed Saver
®
Power
Timer Operation
8
10
7
11
9
43
12
56
How To Operate The EQ08
Function Control Knob
The left knob is a six position control that allows you to
select heat or cool in either low speed or high speed. Plus
you can select fan only if you wish.
The right hand knob is the thermostat - turn it clockwise for
cooler, counter-clockwise for warmer.
Thermostat Knob
10
ELECTRONIC CONTROL SEQUENCE OF OPERATION
MODE CONTROL
The mode control pad(s) allow the selection of the operating
modes of the unit.
There is a two second delay before the mode activates its
appropriate relay.
OPERATING SEQUENCE / CHARACTERISTICS
AND FEATURES
Compressor Operation
The run state of the compressor is determined by the
difference between the indoor ambient temperature and
the set temperature. See specic mode of operation for
details.
Compressor Time Delay: 180 seconds
This feature is initiated every time the compressor is deenergized, either due to:
(1) satisfying the temperature set point
(2) changing mode to fan only
(3) a power interruption or
(4) turning the unit off
The compressor is also time delayed for 3 minutes when the
control is rst plugged in or power is restored after failure.
When the compressor cycles off as a result of satisfying the
“load”, the time delay is typically timed out during the off
cycle. Compressor time delay is bypassed by “Test Mode”.
Return Air Temperature Sensor
The control range is 60°F to 90°F +/- 2.0°F.
Frost Protection Sensor
Temperature settings:
Disable the compressor when sensing 30 +/- 3°F for 2 min.
continuously.
Enable compressor @ 55 +/- 5°F.
The fan should not be affected by the Frost Protection. It
should continue to function normally if freeze protection is
called for.
COOL MODE FOR XQ MODELS
When in the COOL mode, the control will turn on the
compressor when the indoor temperature is 1.5°F above the
set point and turn off the compressor when the ambient gets
below the set point by 1.5°F. The fan will run continuously.
MONEY SAVER MODE
When in MONEY SAVER mode, the system will be turned
on when the indoor temperature gets above the set point by
0.75°F a n d t u r ns off wh e n t h e i n door temperature gets below
the set point by 0.75°F. The fan will turn on 5 seconds before
the compressor and turn off 5 seconds after the compressor
stops. If the compressor is delayed the fan will continue to
run while the compressor restarts. If the thermostat remains
satised for more than approximately 9 minutes, the fan will
turn on for a period of 90 seconds for air sampling. Operation
in MONEY SAVER mode will light both the MONEY SAVER
and COOL indicators.
FAN ONLY MODE
When in the FA N ON LY mode, the compressor will not
operate. The fan will run continuously at the user-selected
speed (see “Fan Speed Set” below). Smart Fan is not
available in FAN ONLY Mode.
FAN SPEED SET
XQ fan speed is changed by pressing FAN SPEED button
and scrolling through F1, F2, F3 and SF (Smart Fan) in the
digital display.
There will be a 2 second delay before the fan speed changes
to prevent unnecessary switching of the relays during fan
speed selection.
SMART FAN
On the XQ model, smart fan is activated by pressing the
FAN SPEED button and scrolling through speeds until
“SF” appears in the digital display. Using the remote
control, Smart Fan is selected by the fourth push of Fan
Speed button.
Smart fan changes fan speeds based on the temperature
differential between the ambient and set temperatures.
CHECKING ROOM TEMPERATURE
Check the room temperature at the electronic control
pad by pressing the “FAN SPEED” button and the
“TEMP ” button at the same time on XQ models.
The indoor temperature will display for 10 seconds. Indoor
temperature can be viewed in all modes, including the
TEST mode. The display can be changed back to SET
temperature by pressing any key, except the ON/OFF
button, or after 10 seconds has elapsed.
KEEP ALIVE
The electronic control has a memory to retain all functions
and status as set up by the user in the event of a power
failure. Once power is restored to the unit there is a two
second delay before the fan comes on and approximately
three minutes delay before the compressor is activated,
providing that the mode was set for cooling and the set
point temperature has not been met in the room.
REBOOT/RESET THE CONTROL BOARD
With unit on, press “MODE” and “TEMP/HOUR ” buttons
simultaneously for 10 seconds. If the panel will reboot, you
will hear the fan come on and the temperature window will
read 60 degrees. If this happens, turn the unit off for about
10 seconds and then turn it back on to nish the reboot
cycle. If the panel does not reboot, you possibly need to
replace it.
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MECHANICAL COMPONENTS
Plenum assembly Diffuser with directional louvers used
to direct the conditioned airfl ow.
Blower wheel Attaches to the indoor side of the fan motor
shaft and is used for distributing unconditioned, room side
air though the heat exchanger and delivering conditioned
air into the room.
Slinger fan blade Attaches to the outdoor side of the fan
motor shaft and is used to move outside air through the
condenser coil, while slinging condensate water out of the
base pan and onto the condenser coil, thus lowering the
temperature and pressu
res within the coil.
ELECTRICAL COMPONENTS
Thermostat Used to maintain the specifi ed room side
comfort level
System switch Used to regulate the operation of the fan
motor, the compressor or to turn the unit off. For troubleshooting, refer to the wiring diagrams and schematics in the back
of this service manual.
Capacitor Reduces line current and steadies the voltage
supply, while greatly improving the torque characteristics of
the fan motor and compressor motor.
MoneySaver® switch When engaged, it sends the power
supply to the fan motor through the thermostat, which allows
Smart Fan
Automatically adjusts the fan speed to main-
tain the desired room temp.
for a cycle-fan operation.
Fan Motor Dual-shafted fan motor operates the indoor
blower wheel and the condenser fan blade simultaneously.
Heating element Electric resistance heater, available in
EQ08 model.
Heat anticipator Used to provide better thermostat and
room air temperature control.
HERMETIC COMPONENTS
Compressor Motorized device used to compress refrigerant
through the sealed system.
Capillary tube A cylindrical meter device used to evenly dis-
tribute the fl ow of refrigerant to the heat exchangers (coils.)
FUNCTIONAL COMPONENT DEFINITIONS
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COMPONENTS TESTING
TESTING THE ELECTRONIC CONTROL
BOARDS FOR XQ MODELS
PM
Fan
Speed
Timer
On/Off
Mode
Set
Hour
Cool
Money Saver
Fan Only
Clock
Start Time
Stop Time
Activating Test Mode:
Activate test mode by pressing at the same time the
“MODE” button and the “TEMP ” button on XQ
models. LEDs for Hour, Start, and Stop will blink 1 bps
while Test Mode is active.
Test Mode has duration of 90 minutes. Test Mode can
be activated under any conditions, including Off. Test
Mode is cancelled by pressing the On/Off button,
unplugging the unit, or when the 90 minutes is timed
out. All settings revert to the factory default settings of
Cool, 75 degrees F, Timer and Set Hour features are
nonfunctional.
Test Mode overrides the three-minute lockout, all
delays for compressor and fan motor start / speed
change, and no delay when switching modes.
X Star
Power
®
Temp/Hour
ERROR CODE LISTINGS
E1 SHORT CYCLE SITUATION: Dened as (compressor
powered on before the three minute time delay ten times in
one hour. Investigate and correct short cycling problem.
E2 KEYBOARD STUCK ERROR: If key button(s) are
pressed continuously for twenty seconds or more. If MODE
key is stuck, unit will default to cool. Exit Error Code
Mode to see if error “E2” is no longer displayed and unit is
functioning. Replace board if “E2” still displays after exiting
Error Code Mode.
E3 FROST PROBE OPEN: Normal operation is allowed.
Ohm frost probe. Replace probe if ohm value not read. If
ohm value is present replace board.
E4 FROST PROBE SHORT: Normal operation allowed.
Replace probe.
E5 INDOOR PROBE OPEN: Control assumes indoor
ambient temperature is 90 degree F and unit will operate.
Ohm indoor probe. Replace probe if ohm value not read.
E6 INDOOR PROBE SHORT: Control assumes ambient
temperature is 90 degree F and unit will operate. Replace
probe.
NOTE: All Error Code displays for Frost & Indoor Probe
will allow unit to operate. Unit may or will ice up if faulty
components not replaced.
FROST PROBE SENSOR: disables compressor at 35
degrees F.
Test Mode default settings are ON, Money Saver, 60
degrees F, and High fan speed.
Activating Error Code Mode: (Submode of Test Mode)
Unit must be in Test Mode to enter Error Code Mode
1. Activate Error Code Mode by pressing the “TIMER ON/
OFF” button on XQ models. LED for the “TIMER ON/OFF”
will ash 1 bps while Error Code Mode is active. Pressing
the “TEMP/HR ” button will display 00. Consecutive
presses will scroll through all error codes logged. Press
the “TEMP/HR ” button to see the reverse order of all
error codes logged. When the end of logged error codes is
reached the temperature set point will appear.
IMPORTANT: Error Codes are cleared from the
log by exiting from Error Code Mode. To exit on XQ
models, press Timer On/Off button. Or unplug unit to
exit Error Code Mode. Plug unit in after 5 seconds to
resume normal operation of unit.
INDOOR PROBE SENSOR: Control range is 60 degrees F
to 90 degrees F +/- 2 degrees F.
Indoor temperature will be displayed by pressing:
(XQ units) The Fan Speed button and the “TEMP ”
button.
The indoor temperature will be displayed for 10 seconds.
The display will change back to the Set Point temperature
by pressing any key button except for the On/Off button.
The indoor temperature can be viewed in all modes,
including test mode.
13
TEST:
1. Remove leads from thermostat.
2. Turn thermostat knob cl ock wise to its c o ldes t
position.
3. Test for continuity between the two terminals. Contacts
should be closed.
4. Turn thermostat knob counterclockwise to its warmest
position.
5. Test for continuity - contacts should be open.
NOTE: The thermostat must be within the temperature
range listed to open and close.
To maintain the comfort level desired, a cross ambient type
thermostat is used. The thermostat has a range from 60°
±2°F to 92° ±3°F. The thermos
tat bulb is positioned in front
of the evaporator coil to sense the return air temperature.
Thermostat malfunction or erratic operation is covered in
the troubleshooting section of this manual.
THERMOSTAT (“EQ08” Models)
(See Figure 17)
This thermostat is single pole-double throw, cross ambient
with a range of 60° to 92°F and a differential of ±2°F. Terminal
“2” is common.
Figure 17
Thermostat
(EQ Model)
Figure 18
Thermostat
TEST:
Cooling/Heating Models: Remove wires from thermostat
and check continuity between terminal “2” (common) and
“3” for cooling. Check between terminals “2” (common)
and “1” for heating. Also check that contacts in thermostat
open after placing in either position. NOTE: Temperature
must be within range listed to check thermostat. Refer to
the troubleshooting section in this manual for additional
information on thermostat testing.
THERMOSTAT ADJUSTMENT
No attempt should be made to adjust thermostat. Due
to the sensitivity of the internal mechanism and the
sophisticated equipment required to check the calibration,
it is suggested that the thermostat be replaced rather than
calibrated. Thermostat bulb must be straight to insure
proper performance.
THERMOSTAT BULB LOCATION
The position of the bulb is important in order for the
thermostat to function properly. The bulb of the thermostat
should be located approximately 45° to a maximum of 60°
from horizontal. Also, do not allow the thermostat bulb to
touch the evaporator coil. (See Figures 17 and 18)
Thermostat sensor holder 020
to be positioned between the
4th and 5th and 6th and 7th
rows of tubes from the bottom
of the coil at dimension shown
Figure 19
Thermostat Bulb Location
(EQ Model)
COMPONENTS TESTING (Continued)
EQ08 SYSTEM CONTROL SWITCH - TEST
“EQ08” SYSTEM CONTROL SWITCH – TEST
Turn knob to phase of switch to be tested. There must be
continuity as follows:
1. “Fan Only” Position – between terminals “MS” and “H”
2. “Hi Cool” Position – between terminals “L1” and “C” and
“MS” and “H”
3. “Low Cool” Position – between terminals “L1” and “C”
and “MS” and “LO”
4. “Low Heat” Position – between terminals “L2” and “2”
and “MS” and “LO”
5. “Hi Heat” Position – between terminals “L2” and “2” and
“MS” and “H”
L1
MS
2
H
LO
C
L2
B1
System Control Switch
(EQ Models)
ELECTRIC SHOCK HAZARD
Disconnect power to the unit before
servicing. Failure to follow this warning
could result in serious injury or death.
WARNING
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