Friedrich KCS08A10A User manual

1PB

Service Manual

Room Air Conditioners

Standard Chassis Models

Kühl KCS08A10A, KCS10A10A, KCS12A10A, KCS14A10A, KCM14A10A

KCS12A30A, KCS16A30A, KCM18A30A, KCM21A30A KCL24A30A,

KCL24A30B, KCL28A30A, KCL36A30A

KHS10A10A

KHM12A33A, KHM18A34A, KHL24A35A

115-Volt:

230-Volt:

Kühl +

Electric Heat

Kühl +

Heat Pump

230-Volt:

93001403_04

KES12A33A, KES16A33A, KEM18A34A, KEL24A35A,

KEL24A35B, KEL36A35A

115-Volt:

230-Volt:

2PB

Table of Contents

INTRODUCTION 3

Important Safety Information 3

Personal Injury Or Death Hazards 4

New Kühl Control Options 6

Component Identication 7

Model and Serial Number Location 7

Model Number Reference Guide 8

Serial Number Reference Guide 9

SPECIFICATIONS 10

Refrigeration Systems Performance Data 10

Installation 12

Electrical Data 13

OPERATION 15

Airow Selection and Adjustment 15

User Interface 16

Control Panel 28

Remote Control 29

Unit 30

General Knowledge Sequence Of Refrigeration 36

ROUTINE MAINTENANCE 37

Remove And Install The Front Cover 37

Standard Filter Removal / Installation Instructions 39

REMOVE AND INSTALL THE CHASSIS 41

TROUBLESHOOTING 43

Cooling Sizing Guide 43

Diagnostic Codes 44

Troubleshooting Tips 45

COMPONENT TESTING 53

Capillary Tube and Check Valve Assy (Heat Pump Units) 53

Capillary Tube Assy (Cool Only Units) 54

Reversing Valve Description And Operation 55

Testing The Reversing Valve Solenoid Coil 56

Checking The Reversing Valve 57

Touch Test Chart : To Service Reversing Valves 58

Compressor Checks 59

Fan Motor 61

Capacitors 61

Heating Element 62

Drain Pan Valve 62

Testing the User Interface and Electronic Control Board 63

Thermistors Description 63

Electronic Control Board Identication 64

Replace the Electronic Control Board 65

Replace the User Interface 65

R-410A SEALED SYSTEM REPAIR 66

Refrigerant Charging 67

Undercharged Refrigerant Systems 68

Overcharged Refrigerant Systems 69

Restricted Refrigerant System 70

Sealed System Method of Charging/ Repairs 71

Compressor Replacement 72

Replace The Reversing Valve 74

WIRING DIAGRAMS 75

INTERACTIVE PARTS VIEWER 86

Available Accessories 87

APPENDIX 88

Appendix 1 Thermistor Resistence Values (This Table Applies to All Thermistors) 88

3PB

Your safety and the safety of others is 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:

Indicates a hazard which, if not avoided, can result in severe personal

injury or death and damage to product or other property.

Indicates a hazard which, if not avoided, can result in personal injury and

damage to product or other property.

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.

Indicates property damage can occur if instructions are not followed.

WARNING

Refrigeration system

under high pressure

Do not puncture, heat, expose to ame or

incinerate.

Only certied refrigeration technicians

should service this equipment.

R410A systems operate at higher pressures

than R22 equipment. Appropriate safe ser-

vice and handling practices must be used.

Only use gauge sets designed for use with

R410A.

Do not use standard R22 gauge sets.

NOTICE

CAUTION

WARNING

The information in this manual is intended for use by a qualied 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 unqualied persons can result in subjecting the unquali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.

Important Safety Information

INTRODUCTION

4PB

SAFETY

FIRST

WARNING AVERTISSEMENT ADVERTENCIA

Do not remove, disable

or bypass this unit’s

safety devices. Doing so

may cause re, Doing so

may cause re, injuries,

or death.

Ne pas supprime, désacti-

ver ou contourner cette

l´unité des dispositifs de

sécurité, faire vous risque-

riez de provoquer le feu, les

blessures ou la mort.

No eliminar, desactivar o

pasar por alto los dispositi-

vos de seguridad de la

unidad. Si lo hace podría

producirse fuego, lesiones

o muerte.

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 qualied 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.

• Do not spray water on the air conditioning unit while the power is on.

• 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.

• Use air conditioner on a single dedicated circuit within the specied amperage rating.

• Use on a properly grounded outlet only.

• Do not cut or modify the power supply cord or remove the ground prong of the plug.

• Never operate the unit on an extension cord.

• Follow all safety precautions and use proper and adequate protective safety aids such as: gloves, goggles,

clothing, properly insulated tools, and testing equipment etc.

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

INTRODUCTION

Personal Injury Or Death Hazards

WARNING

ALWAYS USE INDUSTRY STANDARD PERSONAL

PROTECTIVE EQUIPMENT (PPE)

5PB

• REFRIGERATION SYSTEM REPAIR HAZARDS:

• Use approved standard refrigerant recovering procedures and equipment to relieve high pressure before open-

ing system for repair. Reference EPA regulations (40 CFR Part 82, Subpart F ) Section 608.

• Do not allow liquid refrigerant to contact skin. Direct contact with liquid refrigerant can result in minor to moder-

ate 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 certain to protect personal and surrounding property with re proof materials and have a re extinguisher

at hand while using a torch.

• Provide adequate ventilation to vent off toxic fumes, and work with a qualied assistant whenever possible.

• Always use a pressure regulator when using dry nitrogen to test the sealed refrigeration system for leaks, ush-

ing etc.

• MECHANICAL HAZARDS:

• Extreme care, proper judgment and all safety procedures must be followed when testing, troubleshooting, han-

dling, or working around unit with moving and/or rotating parts.

• Be careful when, handling and working around exposed edges and corners of the 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.

• PROPERTY DAMAGE HAZARDS

• FIRE DAMAGE HAZARDS:

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

• Use air conditioner on a single dedicated circuit within the specied 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.

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

• 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 can result in water damage to personal

items or property.

• Insure that the unit has a sufcient 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 damage to the unit and/or minor to serious property damage.

INTRODUCTION

PERSONAL INJURY OR DEATH HAZARDS

6PB

INTRODUCTION

New Kühl Control Options

The new Kühl gives you a variety of options for control, programming, and scheduling including wireless capabilities.

Wireless Programming and Control:

Friedrich Connect allows you to conveniently control, program, and monitor your air conditioning unit remotely from a smartphone

or computer.

Programmable Timer Options:

Your unit’s digital control comes equipped with a 24-hour timer.

24-Hour Timer

The 24-hour timer allows you to set 2 temperature changes at pre-set times on the unit control panel.

Customizable Programming Options:

Customizable timers, with up to four temperature adjustments per day, can be set using Friedrich Connect for one or multiple units.

See www.friedrich.com for complete details on Friedrich Connect.

Figure 101 (New Kuhl Options)

7PB

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 service technician to quickly and accurately diagnose

and repair malfunctions.

Installation procedures are not given in this manual. They are given in the Installation/Operation manual which can

be aquired on the Friedrich website.

Model and Serial Number Location

MODELNUMBER

YS10M10A

SERIALNUMBER

LICY00008

VOLTS 115

60HZ / 1 PH

VOLTS MIN 108

COOLING

BTH/HR6500

EER12.0

AMPS8.0

HEATING

BTH/HR6500

EER10.4

AMPS7.0

REFRIGERANT

30.1OZ R410A

XXXXXXXXX

600PSIG HS

300PSIG LS

XXXXXXXXXX

XXXXXXXXX

XXXXXXXXXX

FUSEPROTECTED

CIRCUITSUSE 15A

TIMEDELAY FUSE

X XX

XXXXX

XXXXXXXXXX

AIRCONDITIONING CO.

SANANTONIO, TEXAS

ASSEMBLEDIN MEXICO

MODEL NUMBER

YS10M10A

SERIAL NUMBER

LICY00008

AIR CONDITIONING CO.

SAN ANTONIO, TEXAS

ASSEMBLED IN MEXICO

Accumulator

Compressor

Reversing Valve

Evaporator Coil

Blower Wheel

Electronic Control

Board

Control Key Pad

(User Interface)

Fan/Blower Motor

Fan Blade

Condenser Coil

Component Identication

Figure 102 (Component Identication)

Figure 103 (Model and Serial Number Location)

8PB

INTRODUCTION

Model Number Reference Guide

MODEL TYPE

K - KUHL

W - WALLMASTER

FUNCTION

C - COOL ONLY

E - ELECTRIC HEAT

H - HEAT PUMP

APPLICATION

S - SMALL

M - MEDIUM

L - LARGE

APPROXIMATE COOLING

BTU / HR

ENGINEERING REVSION

LETTER INDICATES AN

ENGINEERING MODIFI-

CATION TO AN EXISTING

MODEL

MARKETING SUFFIX LETTER

INDICATES MODIFICATION TO

AN EXISTING MODEL

HEAT STRIP

0 - STRAIGHT COOL & HEAT

PUMP

3 -3.3 KW HEAT STRIP, NOMINAL

4 - 4.0 KW HEAT STRIP, NOMINAL

5 - 5.2 KW HEAT STRIP, NOMINAL

VOLTAGE

1 - 115 VOLTS

3 - 230 VOLTS

MODEL INTRODUCTORY

CHARACTER

A - 2019

B -

C -

D -

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.

Figure 104 (Model Number Reference Guide)

K C M 21 A 3 0 A - A

9PB

INTRODUCTION

Serial Number Reference Guide

YEAR OF MANUFACTURE

17 = 2017 18 = 2018

19 = 2019 20 = 2020

21 = 2021 22 = 2022

MONTH OF MANUFACTURE

01 = JANUARY

02 = FEBRUARY

03 = MARCH

04 = APRIL

05 = MAY

06 = JUNE

07 = JULY

08 = AUGUST

09 = SEPTEMBER

10 = OCTOBER

11 = NOVEMBER

12 = DECEMBER

FACTORY DESIGNATION

M = FRIEDRICH MTY

NUMERIC SEQUENCE

FIRST UNIT OF EACH MONTH = 00001

Figure 105 (Serial Number Reference Guide)

17 12 M 00001

10 PB

SPECIFICATIONS

Refrigeration Systems Performance Data

Model

Condensor

Temp

Deg F.

Discharge

Temp

Deg. F

Suction

Temp

Deg F

Electrical Ratings R-410A

REF. Breaker

AMPS

COOL AMPS

HEAT

LOCKED

ROTOR

AMPS CHARGE

IN OZ Voltage

HERTZ

AMPS

Kühl® (Cool Only)

KCS08A10A 111 154 59 6.5 30.5 24.5 115 15

KCS10A10A 114 155 56 8.5 49 32 115 15

KCS12A10A 118 159 54 9.5 52 33 115 15

KCS12A30A-A 117 170 69 4.8 29 35.9 230 15

KCS12A30A-B 117 170 69 4.8 29 35.5 230 15

KCS12A30A-C 117 170 69 4.8 29 35.9 230 15

KCS12A30A-D 117 170 69 4.8 29 27.7 230 15

KCS14A10A-C 120 169 57 11.8 54.5 26 115 15

KCS14A10A-D 120 169 57 11.8 54.5 25 115 15

KCS16A30A-(A THRU D) 121 163 45 6.6 33 38.3 230 15

KCS16A30A-E 121 163 45 6.6 33 31 230 15

KCM14A10A 113 147 49 10.9 54.5 38 115 15

KCM18A30A 119 180 61 9.6 46 46 230 15

KCM21A30A 123 171 53 9.6 46 46 230 15

KCL24A30A

KCL24A30B 122 168 55 11.1 52 46 230 20

KCL28A30A-A, -C, -D 126 167 45 13.4 60 58.5 230 20

KCL28A30A-A, -C, -D 126 167 45 13.4 60 51.2 230 20

KCL36A30A 130 179 44 18.2 76 68 230 30

Kühl® + (Heat Pump)

KHS10A10A-A 116 153 54 8.8 9.1 50 28.5 115 15

KHS10A10A-B, -C 25.6 115

KHS12A33A 120 163 53 54.7 29 28 230 20

KHM18A34A 117 160 52 7.4 7.4 37 43.1 230 30

KHL24A35A 122 175 64 11.1 10.3 52 48 230 30

Kühl® + (Electric Heat)

KES12A33A 117 170 69 4.9 29 33 230 20

KES16A33A-(A THRU D) 121 163 45 6.6 33 38.3 230 20

KES16A33A-E 121 163 45 6.6 33 31 230 20

KEM18A34A 119 180 61 9.6 46 230 30

KEL24A35A

KEL24A35B 122 168 55 11.1 52 46 230 30

KEL36A35A 130 179 44 18.2 76 68 230 30

*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. Test done at highest unit fan speed.

Figure 201 (Refrigeration Systems Performance Data)

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