Friedrich SS16N30, SQ10N10 User Manual

Room Air Conditioners

Service Manual

AUTO

°F°C AUTO CONTINUOUS

AUTO

SYSTEM FAN MODE

SCHEDULE FAN SPEED

Standard Chassis R-410A Models

Cool Only

115-Volt:

208-230-Volt:

208-230-Volt: ES12M33, ES15M33, EM18M34, EM24M35, EL36M35

208-230-Volt: YS12M33, YM18M34, YL24M35

115-Volt: YS10M10

Kuhl-ServMan (5-10)

SS08M10, SS10M10, SS12M10, SS14M10 SS12M30, SS15M30, SM18M30, SM21M30

SM24M30, SL28M30, SL36M30

Cool with Electric Heat

Heat Pump with Electric Heat

Heat Pump

Table Of Contents

Important Safety Information ..................................................................................................................................... 2-4

Introduction ................................................................................................................................................................... 5

Model and Serial Number Location .............................................................................................................................. 5

Unit Identiﬁ cation .......................................................................................................................................................... 6

Performance Data and Speciﬁ cations .......................................................................................................................... 7

Installation Information/Sleeve Dimensions/Circuit Rating ........................................................................................... 8

Electrical Data ............................................................................................................................................................... 9

Before Operating the Unit ............................................................................................................................................10

Control Panel Operation ..............................................................................................................................................11

Alerts ......................................................................................................................................................................12-14

Remote Control Operation ......................................................................................................................................15-16

Electronic Control System Maintenance Operation .................................................................................................17-20

Unit Operation .............................................................................................................................................................. 21

Cool-Heat Set Points .................................................................................................................................................. 22

Electronic Control Sequence of Operation ............................................................................................................ 23-29

Unit Operation with a Wall-Stat ................................................................................................................................... 29

Removing the Front Cover and Unit Chassis ................................................................................................................ 30

Replacing the ID Coil Thermistor ................................................................................................................................ 31

Replacing the Control Board ....................................................................................................................................... 31

Low Voltage Interface Connector ................................................................................................................................ 32

Replacing the ID Coil Thermistor ................................................................................................................................ 31

Remote Wall Thermostat ....................................................................................................................................... 32-33

Airﬂ ow Selection and Adjustment ............................................................................................................................... 33

Components Testing .............................................................................................................................................. 34-35

Refrigeration Sequence of Operation .................................................................................................................... 36-37

Sealed Refrigeration System Repairs ................................................................................................................... 38-41

Hermetics Components Check ................................................................................................................................... 42

Reversing Valve Description/Operation ...................................................................................................................... 43

Testing the Coil ........................................................................................................................................................... 44

Checking the Reversing Valve ............................................................................................................................... 44-45

Compressor Checks .............................................................................................................................................. 46-47

Compressor Replacement ..................................................................................................................................... 48-49

Routine Maintenance / Battery Check / Change ...................................................................................................... 50-53

Service and Assistance ............................................................................................................................................... 54

Performance Test Data Sheet and Sizing Guide .......................................................................................................... 55

Error Codes and Alarm Status .................................................................................................................................... 56

Troubleshooting ..................................................................................................................................................... 57-66

Electronic Control Board Components Identiﬁ cation ................................................................................................... 67

Wiring Diagrams .................................................................................................................................................... 68-75

Thermistors' Resistance Values .................................................................................................................................. 76

Remote Control Replacement Instructions ........................................................................................................... 77-78

User Interface Service Kit ........................................................................................................................................... 79

Instructions for Using Cooling Load Estimate Form ................................................................................................... 80

Cooling Load Estimate Form ...................................................................................................................................... 81

Heat Load Form .................................................................................................................................................... 82-83

Warranty ..................................................................................................................................................................... 84

IMPORTANT SAFETY INFORMATION

The information contained in this manual is intended for use by a qualiﬁ ed 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 unqualiﬁ ed persons can result in subjecting the unqualiﬁ ed 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.

Your safety and the safety of others are very important.

We have provided many important safety messages in this manual and on your appliance. Always read and obey all safety messages.

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:

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

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.

M• ake sure to follow proper lockout/tag out procedures.

A• lways work in the company of a qualiﬁ ed assistant if possible.

C• apacitors, even when disconnected from the electrical power source, retain an electrical charge potential capable of causing electric shock or electrocution.

H• andle, discharge, and test capacitors according to safe, established, standards, and approved procedures.

E• xtreme 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.

D• o 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.

E• lectrical 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.

N• ever operate the A/C unit with wet hands.

U• se air conditioner on a single dedicated circuit within the speciﬁ ed amperage rating.

U• se on a properly grounded outlet only.

D• o not remove ground prong of plug.

D• o not cut or modify the power supply cord.

D• o not use extension cords with the unit.

F• ollow all safety precautions and use proper and adequate protective safety aids such as: gloves, goggles, clothing, adequately insulated tools, and testing equipment etc.

F• ailure to follow proper safety procedures and/or these warnings can result in serious injury or death.

REFRIGERATION SYSTEM REPAIR HAZARDS:

U• se approved standard refrigerant recovering procedures and equipment to relieve pressure before opening system for repair.

D• o not allow liquid refrigerant to contact skin. Direct contact with liquid refrigerant can result in minor to moderate injury.

B• e extremely careful when using an oxy-acetylene torch. Direct contact with the torch’s ﬂ ame or hot surfaces can cause serious burns.

M• ake sure to protect personal and surrounding property with ﬁ re proof materials.

Have a ﬁ re extinguisher at hand while using a torch.•

Pr• ovide adequate ventilation to vent off toxic fumes, and work with a qualiﬁ ed assistant whenever possible.

A• lways use a pressure regulator when using dry nitrogen to test the sealed refrigeration system for leaks, ﬂ ushing etc.

M• ake sure to follow all safety precautions and to use proper protective safety aids such as: gloves, safety glasses, clothing etc.

F• ailure to follow proper safety procedures and/or these warnings can result in serious injury or death.

MECHANICAL HAZARDS:

E• xtreme care, proper judgment and all safety procedures must be followed when testing, troubleshooting, handling, or working around unit with moving and/or rotating parts.

B• e careful when, handling and working around exposed edges and corners of the sleeve, chassis, and other unit components especially the sharp ﬁ ns of the indoor and outdoor coils.

U• se proper and adequate protective aids such as: gloves, clothing, safety glasses etc.

F• ailure to follow proper safety procedures and/or these warnings can result in serious injury or death.

PROPERTY DAMAGE HAZARDS

FIRE DAMAGE HAZARDS:

R• ead the Installation/Operation Manual for the air conditioning unit prior to operating.

U• se air conditioner on a single dedicated circuit within the speciﬁ ed amperage rating.

Connect to a properly grounded outlet only.•

D• o not remove ground prong of plug.

D• o not cut or modify the power supply cord.

D• o not use extension cords with the unit.

Be extremely careful when using acetylene torch and protect surrounding property.•

Fa• ilure to follow these instructions can result in ﬁ re and minor to serious property damage.

WATER DAMAGE HAZARDS:

I• mproper installation, maintenance or servicing of the air conditioner unit can result in water damage to personal items or property.

In• sure that the unit has a sufﬁ cient pitch to the outside to allow water to drain from the unit.

D• o not drill holes in the bottom of the drain pan or the underside of the unit.

F• ailure to follow these instructions can 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 installation and operation manuals provided with each air conditioning system.

This service manual was written to assist the professional RAC (Room Air Conditioner) service technician to quickly and accurately diagnose and repair malfunctions.

This manual will deal with subjects in a general nature.

Accumulator

Compressor

Outdoor Grille

Discharge Air

Fresh Air Vent

Reversing Valve

Evaporator Coil

Condenser Coil

Electronic Control

Board

Control Key Pad

Support Bar

Blower Wheel

Air Intake From

Sides and Bottom

Control Key Pad

(User Interface)

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 Identiﬁ cation code on page 6).

Chassis Pull

Out Handle

Fan/Blower Motor

Base Pan

Sleeve

Air Intake Vents

Fan Blade

MODEL AND SERIAL NUMBER LOCATION

Model information can be found on the name plate behind the front cover.

For your future con ve nience, record the model information here.

AIR CONDITIONING CO. SAN ANTONIO, TEXAS ASSEMBLED IN MEXICO

COOLING

VOLTS 115

MODEL NUMBER

HEATING

REFRIGERANT

XXXXXXXXX

XXXXXXXXXX

FUSE PROTECTED

30.1 OZ R410A

600 PSIG HS

XXXXXXXXX

CIRCUITS USE 15A

300 PSIG LS

XXXXXXXXXX

TIME DELAY FUSE

XXXXXXXXXX

X XX XXXXX XXXXXXXXXX

AIR CONDITIONING CO.

SAN ANTONIO, TEXAS

ASSEMBLED IN MEXICO

MODEL NUMBER YS10M10A SERIAL NUMBER LICY00008

BTH/HR 6500

60 HZ / 1 PH

YS10M10A

BTH/HR 6500

EER 12.0

VOLTS MIN 108

SERIAL NUMBER

EER 10.4

AMPS 8.0

LICY00008

AMPS 7.0

MODEL NUMBER

SERIAL NUMBER

PURCHASE DATE

UNIT IDENTIFICATION

1st Digit – Function

S = Straight Cool, Value Series Y = Heat Pump E = Electric Heat

2nd Digit

S = Small Chassis M = Medium Chassis L = Large Chassis

Model Number Code

S S 08 M 1 0 A

8th Digit – Engineering

Major change

7th Digit – Options

0 = Straight Cool & Heat Pump Models 3 = 3 KW Heat Strip, Nominal 4 = 4 KW Heat Strip, Nominal 5 = 5 KW Heat Strip, Nominal

3rd and 4th Digit - Approximate BTU/HR in 1000s (Cooling)

Heating BTU/Hr capacity listed in the Speciﬁ cation/Performance Data Section

RAC Serial Number Identiﬁ cation 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 3 = 230-208 Volts

5th Digit

Alphabetical Modiﬁ er

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

PERFORMANCE DATA

SL36M30-A 51 29 129 188 56 12 31 122 470 19.0 96.0 77.0 230/208v 30

COOLING

PERFORMANCE

DATA*

SS08M10-A 53 27 115 157 62 12 31 151 400 6.1 32.0 24.0 115 15 SS10M10-A 52 28 119 150 65 15 28 145 455 8.0 50.0 51.0 115 15 SS12M10-A 50 30 118 163 60 12 23 137 435 10.0 57.0 35.0 115 15 SS14M10-A 49 31 121 170 56 10 22 132 425 12.0 63.0 29.0 115 15 YS10M10-A 56 24 114 150 64 12 14 152 395 7.8 7.6 34.5 33.0 115 15

SS12M30-A 49 31 116 158 62 13 21 142 405 4.8 30.0 33.0 230/208v 15 ES12M33-A 51 29 115 158 62 13 18 140 400 4.8 16.0 30.0 33.0 230/208v 15 YS12M33-A 49 31 116 167 65 16 21 140 455 5.2 5.1 26.0 34.5 230/208 SS15M30-A 53 27 121 171 62 14 28 138 430 6.4 32.0 32.5 230/208v 15 ES15M33-A 53 27 121 171 62 14 28 138 430 6.4 16.0 32.0 32.5 230/208v 15 SM18M30-A 54 26 122 160 62 9 31 145 450 7.4 42.0 55.0 230/208v 15 EM18M34-A 54 26 122 160 62 9 31 145 450 7.4 19.5 42.0 55.0 230/208v 30 YM18M34-A 50 30 118 168 60 15 24 130 410 8.5 8.5 44.0 49.5 230/208v 15 SM21M30-A 48 32 124 170 55 10 28 137 455 9.4 46.0 55.0 230/208v 15 SM24M30-A 46 34 129 179 55 12 34 123 495 11.0 47.0 40.0 230/208v 20 EM24M34-A 46 34 129 179 55 1 YL24M34-A 56 24 121 176 62 18 25 135 480 11.1 12.2 47.0 74.0 230/208V 30 SL28M30-A 47 33 126 181 58 12 26 133 430 13.5 60.0 78.5 230/208v 20

EVAP. AIR TEMP. DEG.

Discharge Air

Temp.

Dro

CONDENSER TEMP DEG. F

Discharge

Temp

Suction

Temp

Super Heat

Sub-

Cooling

2 34 123 495 11.0 47.0 40.0 230/208v 30

OPERATING

PRESSURES

Suction Discharge

ELECTRICAL RATINGS

Amps

Heat

Locked Rotor

Cool

Amps

R-410A

REF.

Charge in

OZ.

Voltage

v15

*Rating Conditions: 80 degrees F, room air temp. & 50% relative humidity, with 95 degree F, outside air temp & 40% relative humidity, all systems use R-410A.

SPECIFICATIONS

Model

Cooling

Capacity Btu

Heating

Capacity Btu

Volts

Rated

Cooling

Amps

Cooling

Watts

Heating

Amps

Heating

Watts COP

Energy

Efﬁ ciency

Ratio

EER

NERGY STAR

 E

Estimated

Yearly

Operating

Cost

qualiﬁ ed

Moisture Removal Pints/HR

Room Side

Air

Circulation

CFM Sleeve

Kühl

SS08M10 7900 — 115 6.1 677 — — — 11.7 $54 1.0 265 S 99



SS10M10 9500 — 115 7.7 848 — — — 11.2 $68 2.0 260 S 106



SS12M10 12000 — 115 10.0 1071 — — — 11.2 $86 3.0 300 S 112



SS14M10 14000 — 115 12.0 1444 — — — 9.7 $115 3.5 325 S 116

SS12M30 11700/11200 — 230/208 4.8/4.9 1026/982 — — — 11.4/11.4 $82 2.8 275 S 112



SS15M30 14500/14300 — 230/208 6.4/6.8 1405/1385 — — — 10.3/10.3 $112 3.5 360 S 116

SM18M30 17500/17200 — 230/208 7.4/8.0 1635/1617 — — — 10.7/10.7 $131 4.6 350 M 140



SM21M30 20800/20700 — 230/208 9.4/10.3 2080/2070 — — — 10.0/10.0 $166 6.0 425 M 132



SM24M30 23500/23300 — 230/208 11.2/11.9 2500/2479 — — — 9.4/9.4 $200 10.0 390 M 152



SL28M30 27800/27000 — 230/208 13.5/14.4 2865/2812 — — — 9.7/9.6 $229 8.5 600 L 193



SL36M30 36000/35700 — 230/208 19.0/20.5 4235/4200 — — — 8.5/8.5 $338 12.0 725 L 212

Kühl +

Heat Pump



YS10M10* 9500 7500 115 7.8 812 7.6 743 3.0 11.7 $65 1.9 285 S 109



YS12M33 12100/12100



YM18M34 18200/17800



YL24M35 24000/23600

Kühl +

Electric Heat

ES12M33 11700/11200 10700/8900 230/208 4.8/4.9 1026/982 16.0/14.7 3500/2900 3.3 11.4/11.4 $82 2.8 275 S 113

ES15M33 14500/14300

EM18M34 17500/17200

EM24M34 23500/23300

EL36M35 36000/35700

9400/9000 230/208 5.2/5.4 1120/1120 5.6/5.8 1132/1139 2.4 10.8/10.8 $89 3.0 265 S 115

15500/15400 230/208 8.5/8.9 1838/1798 8.5/8.7 1833/1761 2.6 9.9/9.9 $147 5.4 370 M 141

23500/23200 230/208 11.1/12.0 2474/2433 12.2/14.3 2610/2575 2.6 9.7/9.7 † 7.0 600 L 197

10700/8900 230/208 6.4/6.8 1405/1385 16.0/14.7 3500/2900 3.0 10.3/10.3 $112 3.5 360 S 117

13000/10600 230/208 7.4/8.0 1635/1617 19.5/17.0 4200/3500 3.1 10.7/10.7 $131 4.6 350 M 141

13000/10600 230/208 11.2/11.9 2500/2479 19.5/17.0 4200/3500 3.1 9.4/9.4 $200 10.0 390 M 153

17300/14300 230/208 19.0/20.5 4235/4200 24.0/22.4 5500/4650 2.5 8.5/8.5 $338 12.0 725 L 213

BREAKER

FUSE

60 Hertz

Weight

Net

Lbs

* Operates on 115 volt and is not equipped with supplemental heat. Will not provide heat at temperatures below 40°F. Friedrich room air conditioners are designed to operate in outdoor temperatures from 60°

F to 115° F.

Due to continuing research in new energy-saving technology, speciﬁ cations are subject to change without notice.

As an ENERGY STAR

guidelines for energy efﬁ ciency.

STAR

partner, Friedrich Air Conditioning Co. has determined that the selected ENERGY STAR® () models meet the ENERGY

The consumer- through the AHAM Room Air Conditioner Certiﬁ cation Program- can be certain that the AHAM Cer tiﬁ cation Seal accurately states the unit’s cooling and heating capacit y rating, the amperes and the energy efﬁ ciency ratio.

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.

R-410A

All models use

environmentally

friendly R-410A

refrigerant.

Installation Information / Sleeve Dimensions

Shell Depth to

Louvers

¾"

½"

Minimum

Extension

Into Room*

¾”

5 ¾”

”18

Minimum

Extension

Outside*

”27

/16

”27

/16

”29

Minimum** Maximum Height Width Max. Depth

Sleeve

S15

M17

L20

Height Width

"25

/16

"25

/16"

Depth

with Front

"29"

/16

"29"

28" 35 ½”

* Minimum ex tensions when mounted in a window.

** Minimum widths achieved using one side curtain assembly as opposed to both in a standard installation. NOTE: S,M and L sleeves may be installed in window with no side kits if properly installed.

Circuit Rating/ Breaker

Model

SS08M10, SS10M10, SS12M10 and SS14M10. YS10M10.

SS12M30, SS15M30, SM18M30 and SM21M30.

SM24M30, SL28M30. ES12M33, ES15M33. YS12M33

Circuit Rating

Breaker or

T-D Fuse

125V - 15A 5 - 15P 6

250V - 15A 6 - 15P 4

250V - 20A 6 - 20P 4

Plug Face

(NEMA#)

Power Cord

Length (ft.)

Wall Outlet

Appearance

Window Width

"42"16

"42"18

”42"20

(C)

Front

(B)

Thru-the-wall Installation

Finished Hole

/16”

" 28 ¼" 15

SIDE VIEW

”

SL36M30. EM18M34, EM24M34, EL36M35. YM18M34 and YL24M35

250V - 30A 6 - 30P 4

For the best cooling performance and highest energy efficiency

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

.dekcolbtonsiroiretxetinuehtdnuorawolfriaehttahtgnidliubehtfo

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 stri

pping.

Be sure to caulk around doors and

windows.

Proper installation of seal gasket

Make sure the seal gasket has been installed properly to minimize noise and improve efﬁ ciency. If the seal gasket has not been installed, please refer to the installation instructions.

ELECTRICAL DATA

Not following the above WARNING could result in ﬁ 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 qualiﬁ ed 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

Grounding Unit MUST be grounded from branch circuit through service cord to unit, or through separate

Receptacle The ﬁ eld supplied outlet must match plug on service cord and be within reach of service cord.

*HACR: Heating Air Conditioning and Refrigeration

rating plate. Proper circuit protection is the responsibiity of the homeowner.

ground wire provided on permanently connected units. Be sure that branch circuit or general purpose outlet is grounded.

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 Certiﬁ cation Program - can be certain that the AHAM Certiﬁ cation Seal accurately states the unit’s cooling and heating capacity rating, the amperes and the energy efﬁ ciency ratio.

WARNING: Before Operating Your Unit

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 oulet. Failure to follow these instructions can result in death, fire, or electrical shock.

Make sure the wiring is adequate for your unit.

If you hav e fus es, they sho uld b e of the t ime dela y ty pe. B efo re yo u in stal l or relocate this unit, be sure that the amperage rating of the circuit breaker or time delay fuse does not exceed the amp rating listed in Table 1.

DO NOT use an extension cord.

The cord provided will carry the proper amount of electrical power to the unit; an extension cord may not.

Make sure that the receptacle is compatible with the air conditioner cord plug provided.

Proper grounding must be maintained at all times. Two prong receptacles

The grounded receptacle should meet all national and local codes and ordinances. You must use the three prong plug furnished with the air conditioner. Under no circumstances should you remove the ground prong from the plug.

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 on the end of the cord 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 1).

3. Press TEST, listen for click; the RESET button trips and pops out.

4. Press and release RESET (Listen for click; RESET button latches

and remains in). The power cord is ready for use.

NOTICE

Do not use the LCDI device as an ON/OFF switch. Failure to adhere to this precaution may cause

premature equipment malfunction.

Once plugged in, the unit will operate normally without the need to reset th e LC DI d evic e. I f the LCD I de vic e fai ls t o tri p whe n te ste d or i f th e pow er su pply cord is d amag ed, it mu st b e rep lac ed wit h a n ew po wer supp ly c or d from the manufacturer. Contact our Technical Assistance Line at (800) 541-6645. To expedite service, please have your model number available.

Table 1.

MODEL

SS08M10, SS10M1 0, SS1 2M 10, SS1 4M10, YS10M10

SS1 2M30, SS 1 5M30, SM1 8M30, SM2 1M30

SL25M30, SL28M30, ES12M33, ES15M33, YS12M33

SL36M30, EM1 8M34, EL25M35, EL36M35, YM1 8M34 , YL2 4M 35

Figure 1

RESET

WARNING

TEST BEFORE EACH USE

1. PRESS RESET BUTTON

2. PLUG LCDI 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

CIRCUIT RATING

OR TIME DELA Y

AMP VOLT

15 125 5-15R

15 250 6-15R

20 250 6-20R

30 250 6-30R

TEST

FUSE

TEST BEFORE EACH USE

1. PRESS RESET BUTTON

2. PLUG LCDI 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

REQUIRED

WALL

RECEPTACLE

NEMA

NO.

TEST

RESET

WARNING

15/20A LCDI Device 30A LCDI Device

FRR001

Control Panel Operation

Let’s check out how to control your air conditioner. On the control panel, just to the left of the POWER control panel function buttons and mode icons can be viewed in Figure 1.

Power On – Press the

power button will illuminate to indicate the power is on. The backlight on the power switch will automatically dim to 20% intensity after of inactivity. The remote control can also be used to turn power ON / OFF (See Remote Control).

Display –

light. The back light has an automatic two (2) step dim function. seconds of inactivity, the display dims to 20% intensity. After an additional 120 seconds, the display switches off. Touching buttons will automatically bring the display to full brightness.

There are four control push buttons on each side of the display.

SYSTEM B utton – Allows the user to sequentially select,

, HEAT , and FAN ONLY operation. Press the button and the display advances to the next mode. A new icon appears. At the same time, the mode displays for two (2) seconds, then returns the display to th

e temperature set point for modes other than FAN. Note that on cool

only units, there are no

FAN MO DE B ut to n – Selects between automatic

operation. In the compressor operates or the heat function is enabled.

In the SYSTEM FAN ONLY Mode, mode, fans speed is determined by your

Figure 1

, is a liquid crystal display (LCD). All of the

button to turn on the air conditioner. The

120

seconds

After 120

Cool

HEAT

and modes.

mode, the fan only turns on and off when the

is not available.

selection on the

In the

button.

FAN SPEED Butto n .sdeeps naf neewteb tceles yllaitneuqes ot desU –

Depending on your model, you can select between LOW, MED, HIGH,

t available on SL and Kuhl+ models.on gnittes xaM .OTUA dna XAM dna When the button is pressed, the fan speed is temporarily displayed in the display window, plus a fan speed icon (triangle) changes to indicate the new speed level. W depending on t

he set temperature on the control panel and the actual

hen auto is selected,

fan speed automatically varies

room temperature. Let me explain. Say for example you’re working in your garage and you need to open the big door for several minutes. The air conditioner will sense a wide difference between the set temperature and the actual room temperature when this occurs the system fan speed increases to MAX. The fan speed decreases (in step) as the temperature difference decreases. When the set point temperature is reached the FAN speed returns to the original setting.

SCHEDULE Button – The

button turns the schedule function on and off. The current day of the week is indicated as a dot underneath the day symbol. Pressing the

button a second time turns the schedule function off. The schedule function comes preprogrammed with recommended energy savings values (Addendum 1). The values may be changed through the schedule program function (See Programmable Thermostat).

UP and DOWN arrows – Pressing either

(UP) or (DOWN) button changes the desired room temperature. The factory preset lower and upper limits are 63° F (16° C) and 99° F (37° C). These buttons are also used to navigate between function options when using the User Menu or Maintenance Mode.

BACK Button .detceles neeb sah meti unem a retfa desu si nottub sihT –

It takes the user back to the previous menu level and to save and exit.

DISPLAY/ENTER Button –

This button is used in conjunction with User Menu and Maintenance Mode operation to select items. This button may also be used to alternatively display the ROOM TEMPERATURE, OUTDOOR TEMPERATURE, and TIME. If the display is left inactive for 10 seconds it will reset to the TEMPERATURE SET POINT.

AWAY

FRONT PAN E L LOCK

CHECK FI LT ERONOFF

HE AT ->

R ET URN NIGHT

SCHEDULE

PERIODS

FILTER MAINTENANCE

EXIT RESET

<- COOLROOM TEMP SE T POINT

WAIT

BACK

DISPLAY

ENTER

AUTO MODE

SYSTEM

FAN

MODE

FAN

COOL

MODE

HEAT

MODE

AUTO

CONTINUOUS

AUTO

FAN ONLY MODE

MAINTENANCE

REQUIRED

OUTDOOR TEMP

% RH

SPEED

SCHEDULE

BUTTONS BUTTONS

SCHEDULE

ON/OFF

TFS

WAKE

POWER

ALERTS (The control system has five (5) customer alerts)

CHECK FILTER

appears on screen. The word “ The

alert is issued when the fan run .sruoh 005 naht retaerg si emit

This alert may be reset by the user (Refer to Special Functions, Filter Reset).

Maintenance Required – When maintenance is required, a service icon

appe ars on scre en. T his icon wi ll not be dismissed until maintenance

has been performed. If the service icon

” appears next to the .nottub

the icon

is established the service icon

goes away.

Wait – The WAIT icon

Whenever the compressor shuts off, system pressures must be allowed to equalize. At this time, an internal timer begins a count-down from up to 240 seconds. If a demand for heat or cool occurs during this count-down the WAIT icon

displays letting you know that the compressor will not operate until the count-down has completed. This timer prevents damage to the unit if it tries to start too quickly after it stops running. Normally the WAIT icon

is off. Once the timer has cleared, the air conditioner will he at o r coo l ba sed on t he t empe rat ure set ting . El ect ric h eat is n ot a ffec ted by this timer.

Protection Alert (Freeze) – If the room freeze protection is active, the

display indicates this by showing Room Freeze Protection "FRZ". Once

temperature is less than 40° F (4° C), and the air conditioner is equipped with electric heat, the room freeze protection will activate. The air conditioner will run high fan and electric heat until the room temperature reaches 46° F (8° C). Pressing the

Low Battery – When the battery is low a warning display

button delays the freeze protection function

will be

inserted before other messages such as “COOL”. If the Low Battery

alert is on, the battery in the control unit must be changed. Refer to the changing the battery procedure. Once the battery is changed, the alert message will go off. Refer to Troubleshooting Tips. Under normal conditions the battery life should be greater than 7 years.

.noitidnoc lamronba na desnes sah metsys eht ybdnats no si

.evitca si tuokcol rosserpmoc eht nehw setanimulli

The hour digits flash first. The user presses the or to change the hours. To change AM-PM, the hours must be advanced 12 hours. Press the key to change to the minutes. To exit the selection process, user presses the key which will go to the time screen.

The minutes digits flash. The user presses the or to change the minutes. Press the key to change the days. To exit the selection process, the user presses the key which will go to the time screen.

The dot underneath the days of the week begins to blink to indicate which day it is. If the user has not set the date before, the dot starts on Monday. If the user is making a correction to previously set information the dot appears under whichever day the unit thinks it is. The user can press or to move the dot left or right (respectively) along the week. The user presses to loop back to the hours setting. To exit the selection process, the user presses the key which will go to the time screen.

Tuesday has been selected. The user presses to loop back to the hours setting. To exit the selection process and accept the changes, the user presses the key which will go to the time screen.

BACK

ecial Functions

Panel Lock – The front panel push buttons can be locked to prevent

inadvertent operation. To lock the front panel, press and hold the

SCHEDULE

buttons for three (3) seconds. A double beep indicates your mode change was successful and a the display, press and hold the The

icon will no longer be visible.

Filter Reset –

and holding the

button for three (3) seconds. A beep indicates the

system timer was reset and the

icon appears on the display. To unlock

SCHEDULE

+ .sdnoces )3( eerht rof snottub

icon displays, the timer may be reset by pressing

icon and the word "

RESE T

" will

no longer be visible.

User Menu Functions – The User Menu Functions allows you to change

the following selections: Set TIME, 12/24 Hour Clock Format, BEEP ON / OFF, DIM ON / OFF, Emergency Heat (EMHT) ON / OFF, Auto BAND Adjust, F/ C Select, FRZ ON / OFF, Temp Offset (TO) and the Automatic Temperature

Sensing Feature (ATSF).

To enter the User Menu, press and hold selection appears. Use the

(UP) or (DOWN) buttons to scroll

through the User Menu. Press the

for 3 seconds, the TIME

button to enter the displayed function. If left inactive for 15 minutes the User Menu display will no longer be visible and it returns to normal operation mode display. To manually exit the User Menu, press the

button.

Time Setting – When in the User Menu, on the Control Panel, use the

(UP) and (DO WN) to se lec t TIME . Push , the hours segment

(UP) and hsup neht ,ruoh eht tes ot )NWOD(

(UP) and

to set the minutes, then push

NOTE: If the AM or PM indicator is incorrect, push

(DOWN)

until the hours

(UP) or (DOWN) to advance the hour segment 12 hours, then push displays. Use the day. Press the

Press

(UP) to go to the next menu 1224.

NOTE: Pressing the

(UP) or (DOWN ) to s elect th e curr ent

key to

save and go back to the TIME screen.

button again will exit the user menu function

. The day of the week

mode. Or simply leave the control inactive for 15 minutes and the control will return back to normal operation.

SYSTEM

FAN

MODE

FAN

SPEED

SCHEDULE

BACK

EXIT

DISPLAY

ENTER

SYSTEM

FAN

MODE

FAN

SPEED

SCHEDULE

BACK

EXIT

DISPLAY

ENTER

User presses or to toggle the format between 12HR and 24HR display. To exit the selection process and accept the change, press the key.

Clock Type – You may select between a 12 hr and 24 hr clock. When

1224 is displayed press the

key then press (UP) or (DOWN)

to toggle between 12 hr and 24 hr clock. To accept the change, press the

key to return to the 1224 screen. Press the (UP) to go to the

next menu BEEP.

BACK

SYSTEM

FAN

MODE

FAN

SPEED

SCHEDULE

EXIT

DISPLAY

ENTER

User presses or to toggle between Beep On and Beep Off. Press the key to accept the change and exit the selection process.

Audible Alerts – You can select to have the control beep when entering

menus.

When BEEP is displayed press the

(DOWN) to toggle between ON and OFF. To accept the change,

press the

key to return to the BEEP screen. Press the (UP) to go

key then press (UP)

to the next menu EMHT on Kühl+ models or F C for Kühl models.

FAN

SPEED

SCHEDULE

User presses or to select between AUTO, DM 20, OFF. Press the key to accept the change and exit the selection process.

The Dim Auto automatically dims the display to 20% and then turns it off after a period of time. The Dim 20 setting behavior is similar to AUTO, but prevents the display from turning off. Minimum brightness is 20%. The Dim Off setting forces the display to run at full brightness.

DISPLAY

ENTER

User presses or to toggle between Emergency Heat On and Emergency Heat Off. Press the key to accept the change and exit the selection process.

Emergency Heat – The Kühl+ heat pump models (YS, YM, YL) have

a special feature that is designed to keep the unit providing heat.

When EMHT is displayed press the

key then press (UP) or

.FFO dna NO neewteb elggot ot )NWOD(

To accept the change, press the Press the

(UP) to go to the next menu BAND

In the unlikely event of a compressor failure, the heat pump unit may be switched to operate in the electric heat mode only until repairs can be made.

BACK

SYSTEM

FAN

MODE

FAN

SPEED

SCHEDULE

EXIT

DISPLAY

ENTER

The menu allows the user to adjust the minimum spread between the Auto Cool set point and the Auto Heat set point. Press the or key to adjust. The adjust range is 3 to 10.

Auto Changeover ‘Dead Band’ – A buffer Zone between heating and

cooling in which no conditioning occurs. For Kühl+ models with the auto changeover feature you can select the temperature band between heating and cooling. From the factory the band is set at 3° F (-16° C). The band is adjustable from 3° F (-16° C) to 10° F (-12° C). When BAND is displayed press the key then press (UP) or (DOWN) to toggle between 3 and 10. To accept the change, press the key to return to the BAND screen. Press the (UP) to go to the next menu F C.

BACK

SYSTEM

FAN

MODE

FAN

SPEED

SCHEDULE

User presses or at the same time to toggle between Fahrenheit or Celsius as their temperature unit of choice. Press the key to accept the change and exit the selection process.

EXIT

DISPLAY

ENTER

.neercs THME eht ot nruter ot yek

Fahrenhei t / Celsius Sel ection – You may select between displaying

temperature in F or C. When F C is displayed press the press change, press the

(UP) or (DOWN) to toggle between F and C. To accept the

key to return to the F C screen. Press the

key then

(UP) to go to the next menu FRZ.

BACK

SYSTEM

FAN

MODE

FAN

SPEED

SCHEDULE

EXIT

DISPLAY

ENTER

User presses or to select between Freeze Protection On & Freeze Protection Off. Press the key to accept the change and exit the selection process.

Free ze Pro tec tion – The Kühl+ models have a special feature that is

designed to keep the interior space above freezing by energizing the electric heater anytime the indoor room temperature falls to 40° F (4° C) . With the freeze protection feature turned on, when the unit senses the indoor temperature fall to 40° F (4° C) the unit will run the heater and high fan until the space reaches 46° F (8° C) When FRZ is displayed press the

key then press (UP) or (DOWN) to toggle between ON

and OFF. To accept the change, press the key to return to the FRZ screen. Press the

(UP) to go to the next menu TO.

SYSTEM

FAN

MODE

FAN

SPEED

SCHEDULE

BACK

EXIT

DISPLAY

ENTER

Y R

User presses or to select between ATSF On or Off. Press the key to accept the change and exit the selection process.

Automatic Temperature Sampling Feature - The automatic temperature

sampling feature maintains a balanced temperature throughout the room by circulating the air for 30 seconds once every 9 minutes that the unit is not running when it is set to cooling or heating mode. By circulating the air the unit can detect hot or cold areas in the room and operate the unit to cool or warm the room as necessary. This function is only available when the fan mode is set to ‘AUTO’ or in COOL or HEAT Mode. (Heating function only available on Kuhl+ units)

User presses or to increment/decrement the temperature offset (TO) for the room temperature sensor. (Maximum offset = +/- 8 degrees F). Press the key to accept the change and exit the selection process

Temperature Offset – In some cases the built in thermostat on the unit

For display only. No user selectable options.

may not display the temperature as it is felt in the room. This can be caused by many things including the size of the unit, the heat load on the room or other factors. Friedrich allows you to select the appropriate temperature offset to make the temperature readout as accurate as possible for your application.

In many cases the factory 0° F (-18° C) offset will provide

an accurate temperature readout. To change the offset follow these instructions. When TO is displayed press the (UP) or

(DOWN) to toggle between 0° F (-18° C) and 8° F (-13° C) .

key then press

In most instances an offset from 0° F (-18° C) to 2° F (-17° C) is all that is necessary. To accept the change, press the screen. Press the

(UP) to go to the next menu ATSF.

You may cycle through the menus using the (UP) or (D OWN) keys to access any of the menus.

key to return to the TO

Firmware Version - When VER is displayed press Display /

Enter key. The firmware version is displayed as left digit (Major) and right digit (Minor). This version number should be used along with Model and Serial numbers for service.

DIGITAL CONTROL PANEL'S ACCESS CODES SUMMARY

Key Sequence

Filter Reset Press BACK key for 3 sec + play double beep ( ) Enter User Menu Press DISPLAY/ENTER key for 3 sec + play double beep ( ) Enter Maintenance Menu Press SYSTEM + SCHEDULE + BACK + DISPLAY/ ENTER for 3 sec + play double beep () Schedule ON/OFF Press SCHEDULE once each time Enter & Exit Schedule Programming Press SCHEDULE for 3 sec + play double beep () Reset Error Codes & Error History Press  +  for 3 sec + play double beep ( ) Lock Control Panel Press SCHEDULE + DISPLAY/ENTER f

Action

or 3 sec + play double beep ()

Remote Control Operation

Remote Control – Refer to Figures 11 and 12 during operation description. Getting Started – Install two (2) AAA batteries in the battery compartment

located on the back of the unit.

Operation – The remote control should be within 25 feet of the air

conditioner for operation (Refer to Figure 10 for effectiveness). Press the

button to turn the remote on. The remote will automatically power off after 15 seconds if the buttons are not being pressed. The remote must be on to control the unit.

POWER Button – Turns remote and unit on and off. SYSTEM Button – Allows the user to sequentially select,

HEAT

, and FAN ONLY operation. When the button is pressed, the

Note that when the heating function is not available, the system will automatically skip the HEAT and AUTO modes.

FAN MODE B ut ton – Selects between automatic (

operation. In the AUTO mode, the fan only turns on and off when the compressor operates or the heat function is enabled.

NOTE: AUTO is not available in the FAN ONLY Mode, the display

indicates determined by your selection on the

. In the mode, fan speed is

button.

Cool ,

) or

FAN SPEED Butto n – Used to sequentially select new fan speed, plus

AUTO operation. When the

FA N

button is pressed, the fan speed is

SPEED

temporarily displayed in the display window, plus a fan speed icon (triangle) changes to indicate the new speed level. Fan speed automatically varies depending on the set temperature on the control panel and the actual room temperature. Let me explain. Say for example you’re working in your garage and you need to open the big door for several minutes. Since there is a big diffe rence between your set temperature and the actual room temperature the system fan speed increases to MAX. It remains at this speed until the room temperature matches the set temperature.

SCHEDULE

SCHEDULE Button

off. Pressing the off. Only the schedule icon

UP and DOWN Arrows – Pressing either the

.egassem yalpsid a aiv detceles neeb sah edom hcihw setacidni yalpsid

button changes the desired room temperature. The factory preset lower

– The

SCHEDULE

button a second time turns the schedule function

button turns the schedule function on and

will be displayed.

(UP) or (DOWN)

and upper limits are 60° F (16° C) and 99° F (37° C). These buttons are also used to navigate between function options when using the User Menu or Maintenance Mode.

Remote Effectiveness

Hand Held Remote – Has an operating range of up to 25 ft. The infrared

remote control signal must have a clear path to transmit the command to the air conditioning unit. The remote signal has some ability to "bounce" off of walls and furniture similar to a television remote control. The diagram below shows the typical operating range of the control in a standard room with 8 ft high ceilings.

SIDE VIEW

7.5ft

60°

TOP VIEW

25ft

30°

45°

25ft

45°

30°

8ft

25ft

4ft

8ft

60°

45°

30°

25ft

6ft

16ft

25ft

Changing Temperature from F˚ (Fahrenheit) To C˚ (Celsius) or Reverse

Be within 25' of unit with the remote control. Press the SYSTEM and FAN MODE buttons at the same time and hold for 3 seconds. The display will show the temperature in Celcius. Do the same to reverse temperature to F

˚ (Fahrenheit).

Remote Control Operation (Continued)

Figure 1

DISPLAY

Figure 2

SYSTEM

TEMPERATURE

SCHEDULE

AUTO ICON

COOL

ICON

HEAT

ICON

FAN MODE

POWER

TEMPERATURE DOWN

FAN SPEED

FRR005

FAN ONLY

ICON

SYSTEM

MODE

FAN

MODE

FAN

SPEED

SCHEDULE

ICON

°F / °C ICONs

2 X 16 SEGMENT

DISPLAY

FRR006

ELECTRONIC CONTROL SYSTEM MAINTENANCE

Introduction

This section contains information on the maintenance alerts, temperature limiting, diagnostic test and how to access. The electronic control system has a built in maintenance sub system which works constantly behind the scenes to help identify problems with the air conditioner or control system. When maintenance is required, a service icon appeasrs on the display screen.

This icon will not be dismissed until maintenance has been performed or the problem cleared.

Note: The wrench icon may be on steady or flash, depending on severity. Maintenance should only be performed by qualified service

personell.

Display

T esting the Display

Press the FAN MODE and FAN SPEED buttons at the same time for 3 seconds. All of the display's icons and functions should light up. If any of them do not light up, the display should be replaced. When the buttons are released, the display reverts to the original display.

Electronic Control System Maintenance Operation

To Enter the Maintenance Section:

Press SYSTEM+SCHEDULE+BACK+DISPLAY/ENTER for 6 seconds.

There are 5 maintenance sub-menus M1 through M5.

Access

Maintenance Sub-Menus

– Temperature High Limit – Temperature Low Limit

– Test Mode Access

– Provision Switch Setting & State

M4 M5

– Alarms & History –

Pressing the ▼or ▲key cycles through the sub-menus. Press DISPLAY/ENTER to enter a sub-menu. The BACK key is used to exit the menu.

be taken when modifying parameters in the maintenance menus.

Service Only

Factory Use Only

Factory Use OnlyFactory Use Only

Service Only Service Only

Service Only

Extreme care must

Temperature High Limit

Maintenance function 1 is ready to be selected. Press DISPLAY/ENTER to access the function.



User presses is the maximum upper limit. The current stored high limit is displayed when the screen is selected. Press the BACK key to accept the value, and exit the sub-menu to the M1 screen.

or  to increment or decrement the upper temperature limit. 99°F

Temperature Low Limit

Maintenance funtion 2 is ready to be selected. Press DISPLAY/ENTER to access the fuction



User presses minimum lower limit. The current stored lower limit must be displayed when the screen is selected. Press the BACK key to accept the value, and exit the sub-menu to the M2 screen.

or  to increment or decrement the lower temperature limit. 60°F is the

M3 – Test Mode Access

Maintenance function 3 is ready to be selected. Press

DISPLAY/ENTER to access the function.

User presses the ▼or ▲key to toggle the Test Mode

ON/OFF. Press the BACK key to accept the change

and exit the sub-menu to the M3 screen.

This test selects the system mode of operation directly.

The Following functions Can be Tested

1. System Mode: Cool/Heat Pump Compressor, Electric Heat, Fan Only

2. Fan operation and speeds

Test mode Bypasses:

1. Compressor lock out (time delay)

2. All relay switch’s delays

3. All thermistors delay

4. Automatic heat/cool changeover delay

5. System settings

If M3 switch is left ON it will reset to OFF automatcally after 15 minutes of inactivity.

M4 – Switch Access (Unit Configuration)

FACTORY USE ONLY

M5 – Error Codes & History

Maintenance funtion 5 is ready to be selected. Press DISPLAY/ENTER to access the function.

The error code display shows the error code number on the left, and the error code history on the right. User presses the

The current state of the error code is shown with the On/Off icon. To exit the maintenance sub-menu, press the BACK key to return to the M5 screen. Shown on this display is error code 1 with 4 occurances. The current state is on.The error code display shows the error code number on the left, and the error code history

on the right. User presses the current state of the error code is shown with the On/Off icon. To exit to the maintenance sub-menu, press the BACK key to return to the M5 screen. Shown on this display is error code 6 with 3 occurances. The current state is off.



or  keys to cycle through the error codes.

or  keys to cycle through the error codes. The

Number of Errors

Error Code

Error Code On/Off

To Clear Error Codes’ History:



Hold the

or  keys simultaneously for 3 seconds. See page 56 for alarm status and error codes.

M6 – Factory Use Only

UNIT OPERATION

There are two basic ways to operate the unit - Front Panel and Wallstat. The Front Panel and Wallstat are never active at the same time. Switching between these modes is controlled via the (FP) jumper on the Wallstat connector. When the jumper is ON, the mode = Front Panel.

Front Panel

System Mode Sequence (SCHEDULE = OFF)

There are two system modes of operation. One for a cool only unit (see figure 1) and one for a heat-cool unit (see figure 2). System parameters for each system mode are saved when exiting a system mode, and retrieved when entering a new system mode.

Figure 1

System Mode: Cool Only Units

Figure 2

System Mode: Heat - Cool Units

COOL-HEAT SET POINTS

The air conditioner control system is designed to control different product configurations with a select set of features. Some models just cool, some cool and heat with electric heat, and others cool and heat with a heat pump and/or electric heat.

The system set points are mapped to the internal controls as shown below.

1.5

Deadband

Control

There are 8 stored & variable set points in the system:

System Set Point Mapping Figure

1 - ASPC: Auto Set Point Cool 2 - ASPH: Auto Set Point Heat 3 - CSP: Cool Only Set Point 4 - HSP: Heat Only Set Point 5 - SASPC: Scheduler Auto Set Point Cool 6 - SASPH: Scheduler Auto Set Point Heat 7 - SSPC: Scheduler Set Point Cool Only 8 - SSPH: Scheduler Set Point Heat Only

ELECTRONIC CONTROL SEQUENCE OF OPERATION

Compressor and Rev ersing V alve Control

Active Mode Compressor

Cooling De-Energized Heat - Heat Pump

Heat - Electric Fan Only

* The Reversing valve stays in the last state until a call for heat or cooling (see ﬁ gure below)

On Off Off

Reversing Valve State

Energized

Compressor Operation:

The reversing valve only changes when required

to provide cooling or heat pump. The RV valve

stays in it's last state until required to change.

Cooling Mode

Once the ambient temperature rises past the cool demand threshold (Cool Set Point + 1.5 ˚F) (see ﬁ gure below), and the compressor is not locked out, the cooling cycle begins. As shown in the ﬁ gure below, the fan is started 5 seconds prior to the compressor. Once the ambient temperature has been lowered to the cool set point (Cool Set Point minus .25 ˚F), the cooling cycle starts to terminate by shutting off the compressor. After a 30 seconds delay, the fan is shut off. (See ﬁ gure below for graphic details)

Heating Mode Control Operation

There are two heating methods: Heat Pump and Electric Resistance Heat. There are 3 types of units that provide heating: Heat Pump Only (Model YS10M10) Heat Pump with Electric Heat and Cool with Electric Heat.

Heat Control Operation Heat Pump Only

Once the ambient temperature falls below the Heating Demand Threshold (1.5 ˚F Below the Heat Set Point Temperature), the heating cycle begins. The fan is turned on 5 seconds later. Once the ambient temperature has been raised to the Heat Satisﬁ ed Point (Set point + .25 ˚F), the compressor is turned off. The fan is turned off 30 seconds later. The ﬁ gure below illustrates the basic heat pump operation.

Heat Control (Heat Pump Only)

Heat Pump With Electric Heat Operation

This heating is more complex due to the possibility of two heating methods. If the ambient indoor temperature is below the heat demand threshold (1.5˚F below the heat set point temperature), and the compressor is not locked out, turn on compressor. If the ambient indoor temperature is 0.25˚F above the heat set point turn off the compressor.

If the compressor is locked out & electric heat is available:

1. Turn on the electric heat until the compressor is not locked out.

2. After lockout, turn off the electric heat, wait 5 seconds, then turn on the compressor.

If Electric Heat is Available

After the Heat button is initially pressed, the unit will run the electric heater until the initial set point is satisﬁ ed (Hot Start Feature). After the initial start, the unit will switch to Heat Pump heat and decide between Heat Pump heat and Electric

heat based on the following two monitored conditions:

Condition 1

If the outdoor coil temperature sensor drops to 30 ˚F or less for 2 consecutive minutes, the unit will switch to electric heat if available. Thereafter, the unit will switch back to Heat Pump heat if the outdoor coil temperature sensor rises to 45 ˚F or greater.

If Electric Heat is not available (out of order) and the outdoor coil temperature sensor drops to 30 ˚F or less for 2 consecutive minutes, then the compressor and fan will turn off. Thereafter, the unit will switch back to Heat Pump heat if the outdoor coil temperature rises to 45 ˚F or greater.

Heat Pump With Electric Heat Operation (Continued)

Condition 2

If the Δ (delta) (set point temperature minus the ambient indoor temperature) is greater than 5 ˚F, then the unit will switch to electric heat, if available. The unit will continue to operate with electric heat until the heat demand is satisﬁ ed. Note that the electric heat switches on after the Δ temp passes 5°F and the heat pump switches off. Also note that the electric heat will run until the heat demand is satisﬁ ed. When another heat demand cycle is initiated, the heat pump will run unless the Δ temp is greater than the electric heat threshold.

Emergency Heat

If a compressor fails in the heating season, the Emergency Heat allows the user to override the Heat Pump and heat with electric heat only. This is controlled via the user interface (See the User Menu Functions page 12).

Note that if heat is the ﬁ rst demand cycle (demand cycle = call for heat or call for cooling) after power restoration, the control system will run electric heat for the entire cycle if the unit is equipped with electric heat.

Electric Heat Operation in Cool with Electric Heat Units

When in the Heat mode, with and without Fan Mode Auto (Fan cycling): If the indoor ambient temperature is below the Heat Demand Threshold (Heat Set Point minus 1.5 ˚F), turn on electric heat. If Ambient is 0.3 ˚F above the Heat Set Point turn off the electric heat.

System Mode Auto

This mode provides automatic change over between cool and heat. The auto mode runs based on the room ambient temperature vs. the Demand Thresholds. It is only available in Heat-Cool Unit.

Notes:

The Heat Demand Threshold and the Cool Demand Threshold values are derived from the Auto Set Point in the Auto Mode (refer to page 22). There is a buffer zone as shown in ﬁ gure , where no heating or cooling is allowed to occur. It is critical that the Cool Demand Threshold be greater than the Heat Demand Threshold by a minimum of 3° while in the Auto System Mode. For example, if a user enters a value for the Auto Cooling Set Point that violates the minimum Δ 3° rule, the Auto Heating Set Point will adjust accordingly. This buffer zone (BAND) can be manually adjusted from 3 to 10° (see the BAND section page 13).

When programming the schedule, the user has the ﬂ exibility to enter the schedule automatic set point cooling (SASPC) and the schedule automatic set point heating (SSPH) set points directly. These values are monitored to ensure that they do not violate the minimum 3° Δ rule. If a violation is detected, the opposite set point will adjust to compensate. The individual heating and cooling rules apply to the auto mode.

Automatic Change Over Delay (Cool with Heat Units)

The change over delay ensures that any system heating or cooling over shoot does not trigger an opposite demand cycle. The change over delay = 15 min. This timer blocks the opposite demand cycle from running until the timer expires. As an example, if the last demand was a cool cycle, and another cool cycle is requested, the timer will not block the request. However, if the last demand cycle was a cool cycle, and heat cycle is requested, the timer will block the request until the change over delay is expired.

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