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Table of Contents
Troubleshooting
Related Manuals for Friedrich QUIETMASTER 2008
Summary of Contents for Friedrich QUIETMASTER 2008
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Page 1: Service Manual
Service Manual Models 2009 Room Air Conditioners 2008 RAC-ServMan (04-09) - Page 2 TECHNICAL SUPPORT CONTACT INFORMATION FRIEDRICH AIR CONDITIONING CO. Post Office Box 1540 · San Antonio, Texas 78295-1540 4200 N. Pan Am Expressway · San Antonio, Texas 78218-5212 (210) 357-4400 · FAX (210) 357-4490 www.friedrich.com Printed in the U.S.A.
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Page 3: Table Of Contents
Table Of Contents Important Safety Information ............................2-4 Introduction ..................................5 Unit Identification ................................6 Chassis Specifications for 2009, 2008 Models ....................... 7 Installation Information/Sleeve Dimensions ........................8 Performance Data ................................9 Electrical Data ................................10 Before Operating the Unit .............................. 11 How to Operate the QM Programmable ........................ -
Page 4: Important Safety Information
IMPORTANT SAFETY INFORMATION The information contained in this manual is intended for use by a qualified 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 unqualified persons can result in subjecting the unqualified 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. - Page 5 • 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.
- Page 6 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 specified amperage rating. • Connect to a properly grounded outlet only. Do not remove ground prong of plug.
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Page 7: Introduction
INTrOdUCTION This service manual is designed to be used in conjunction with the installation manuals provided with each air conditioning system component. This service manual was written to assist the professional RAC service technician to quickly and accurately diagnose and repair malfunctions. This manual will deal with subjects in a general nature. -
Page 8: Unit Identification
UNIT IdENTIfICATION Model Number Code S S 08 L 1 0 E 8th Digit – Engineering Major change 1st Digit – Function S = Straight Cool, Value Series Y = Heat Pump 7th Digit – Options E = Electric Heat K = Straight Cool 0 = Straight Cool &... -
Page 9: Chassis Specifications For 2009, 2008 Models
** 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 50° F to 115° F. TwinTemp Heat Pump heating information indicates heat pump heating performance. -
Page 10: Installation Information/Sleeve Dimensions
INSTALLATION INfOrMATION / SLEEvE dIMENSIONS Thru-the-wall Installation Depth Shell Depth to Window Width Finished Hole Minimum Minimum with Front Louvers Extension Extension Sleeve Height Width Into Room* Outside* Minimum** Maximum Height Width Max. Depth 14" 19 ¾" ∕ " 8 ½" 5 ½"... -
Page 11: Performance Data
PErfOrMANCE dATA fOr 2009, 2008 MOdELS EVAP. AIR TEMP. DEG. F OPERATING PRESSURES ELECTRICAL RATINGS R-22 REF. BREAKER FUSE COOLING CONDENSER Discharge Temp Suction Temp Super Heat Sub-Cooling Voltage PERFORMANCE DATA* TEMPERATURE DEG. F Temp. Locked Rotor Charge in Discharge Air Suction Discharge Amps Cool Amps Heat... -
Page 12: Electrical Data
ELECTrICAL dATA WARNING ELECTRIC SHOCK HAZARD Turn off electric power before service or installation. All electrical connections and wiring MUST be installed by a qualified 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. -
Page 13: Before Operating The Unit
XQ06 • XQ08 • XQ10 • XQ12 EQ08 Test the power cord SS12 • SS16 • SM18 All Friedrich room air conditioners are shipped from the factory with a 6-15R SM21 • KM18 Leakage Current Detection Interrupter (LCDI) equipped power cord. The LCDI device meets the UL and NEC requirements for cord connected air SM24 •... -
Page 14: How To Operate The Qm Programmable
How to operate the Friedrich room air conditioner (QuietMaster Programmable) To start unit If your air conditioner is installed and plugged into a proper re- Figure 3 Power button once. The unit will , e l i t i automatically be in Cool mode with the temperature set at 75°F (24°C) and the fan speed at F1, the sleep setting. -
Page 15: How To Use The Qm Programmable Remote Control
MINUTES ARE NOT SHOWN ON THE DISPLAY.) A light will appear in the upper left corner of the display when the hour is P.M. * A Friedrich RC1 wireless remote control can be used to operate all QuietMaster Programmable models. -
Page 16: How To Operate The Xq
How to operate the Friedrich room air conditioner (XQ models) To start unit Figure 5 i t i d s n i l l a t s i t ready to go. The first time the unit is started, the compressor will delay for three minutes. -
Page 17: How To Use The Xq Remote Control
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 wireless remote controls can be purchased from your Friedrich dealer. -
Page 18: How To Operate The Qm And Twintemp
How to operate the Friedrich room air con di tion er (QuietMaster / Twintemp models) To start unit If your air conditioner is installed and plugged into a properly grounded , e l i t i . e t Mode control (QuietMaster) -
Page 19: Function Control
EQ08 models Function Control The left knob is a six position control that allows you to select heat or cool in either low speed or high speed. Plus HEAT you can select fan only if you wish. High Heat Only Function Control High Heat... -
Page 20: Testing The Electronic Control And Error Code Listings
Activating Error Code Mode: (Submode of Test Mode) E6 INDOOR PROBE SHORT: Control assumes Unit must be in Test Mode to enter Error Code Mode ambient temperature is 90 degree F and unit will operate. Replace probe. 1. Activate Error Code Mode by pressing the “TIMER ON/ OFF”... -
Page 21: Testing The Rotary Control Switches
TESTING ThE rOTArY CONTrOL SWITChES (Heat Pump & Electric Heat Models) (See Figure 12) 3. “ Med Cool” Position - between terminals “C” and “3”, An e ight position control switch i s used t o regulate the “C2” and “2”, “M” and “M/S”, “AR” and “5”. operation of the fan motor and compressor. -
Page 22: Functional Component Definition
SYSTEM CONTROL SWITCH - TEST (See Figure 15) Vent door Allows introduction of fresh air into the room Disconnect leads from control switch. There must be and/or exhausts stale room air outside (on select models.) continuity as follows: “Off” Position - no continuity between terminals. Plenum assembly Diffuser with directional louvers used to direct the conditioned airfl... -
Page 23: Components Testing
COMPONENTS TESTING THERMOSTAT (“EQ08” Models) (See Figure 17) This thermostat is single pole-double throw, cross ambient In the heating cycle, the heat anticipator is energized to with a range of 60° to 92°F and a differential of ±2°F. Terminal supply a small amount of heat during the “on” cycle. This “2”... - Page 24 COMPONENTS TESTING (Continued) RESISTOR: Heat Anticipator (See Figure 20) Failure of the resistor will cause prolonged “off” and “on” cycles of the unit. When replacing a resistor, be sure and use Figure 21 the exact replacement. Resistor ratings are as follows: Defrost Thermostat (Heat Pump Models) 115 Volt - 5,000 ohms 3 watt...
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Page 25: Capacitor Check With Capacitor Analyzer
COMPONENTS TESTING (Continued) FAN MOTOR A single phase permanent split capacitor motor is used to drive Many motor capacitors are internally fused. Shorting the the evaporator blower and condenser fan. A self-resetting terminals will blow the fuse, ruining the capacitor. A 20,000 overload is located inside the motor to protect against high ohm 2 watt resistor can be used to discharge capacitors temperature and high amperage conditions. -
Page 26: Defrost Thermostat Operation
COMPONENTS TESTING (Continued) HEATING ELEMENT (See Figure 25) DRAIN PAN VALVE All heat pumps and electric heat models are equipped with (See Figure 26) a heating element with the exception of models starting During the cooling mode of operation, condensate which with YS09. -
Page 27: Electronic Control Sequence Of Operation
ELECTrONIC CONTrOL SEQUENCE Of OPErATION ANd XQ MOdELS PrOGrAMMABLE Mode Control The mode control pad(s) allow the selection of the operating thermostat remains satisfied for more than approximately 9 modes of the unit. minutes, the fan will turn on for a period of 90 seconds for air sampling. -
Page 28: Refrigeration Sequence Of Operation
rEfrIGErATION SEQUENCE Of OPErATION A good understanding of the basic operation of the The refrigerant leaves the condenser Coil through the liquid refrigeration system is essential for the service technician. line as a warm high pressure liquid. It next will pass through Without this understanding, accurate troubleshooting of the refrigerant drier (if so equipped). -
Page 29: Sealed Refrigeration System Repairs
SEALEd rEfrIGErATION SYSTEM rEPAIrS IMPORTANT ANY SEALED SYSTEM REPAIRS TO COOL-ONLY MODELS REQUIRE THE INSTALLATION OF A LIQUID LINE DRIER. ALSO, ANY SEALED SYSTEM REPAIRS TO HEAT PUMP MODELS REQUIRE THE INSTALLATION OF A SUCTION LINE DRIER. EQUIPMENT REQUIRED: High Pressure Gauge - (0 - 400 lbs.) 1. -
Page 30: Method Of Charging/Repairs
Method Of Charging / repairs The acceptable method for charging the RAC system is the Weighed in Charge Method. The weighed in charge method is applicable to all units. It is the preferred method to use, as it is the most accurate. The weighed in method should always be used whenever a charge is removed from a unit such as for a leak repair, compressor replacement, or when there is no refrigerant... -
Page 31: Undercharged Refrigerant Systems
WARNING WARNING HIGH PRESSURE HAZARD ELECTRIC SHOCK HAZARD Turn off electric power before service or Sealed Refrigeration System contains refrigerant installation. and oil under high pressure. Extreme care must be used, if it becomes Proper safety procedures must be followed, necessary to work on equipment with power and proper protective clothing must be worn applied. -
Page 32: Restricted Refrigerant System
restricted refrigerant System Troubleshooting a restricted refrigerant system can be at the metering device entrance to the evaporator. The difficult. The following procedures are the more common evaporator in a partial restriction could be partially frosted problems and solutions to these problems. There are two or have an ice ball close to the entrance of the metering types of refrigerant restrictions: Partial restrictions and device. -
Page 33: Hermetics Components Check
hErMETIC COMPONENTS ChECK WARNING WARNING BURN HAZARD Proper safety procedures must be followed, CUT/SEVER HAZARD and proper protective clothing must be worn Be careful with the sharp edges and corners. when working with a torch. Wear protective clothing and gloves, etc. Failure to follow these procedures could Failure to do so could result in serious injury. -
Page 34: Reversing Valve Description/Operation
rEvErSING vALvE dESCrIPTION/OPErATION WARNING ELECTRIC SHOCK HAZARD Disconnect power to the unit before servicing. Failure to follow this warning could result in serious injury or death. The Reversing Valve controls the direction of refrigerant “A” and “B” ports of the pilot valve. A third capillary is a common flow to the indoor and outdoor coils. -
Page 35: Testing The Coil
TESTING ThE COIL pressure to build in the system. Then switch the system WARNING from heating to cooling. ELECTRIC SHOCK HAZARD If the valve is stuck in the heating position, block the air Unplug and/or disconnect all electrical power flow through the indoor coil and allow discharge pressure to the unit before performing inspections, to build in the system. -
Page 36: Procedure For Changing Reversing Valve
Touch Test in heating/Cooling Cycle 6. Protect new valve body from heat while brazing with plastic WARNING heat sink (Thermo Trap) or wrap valve body with wet rag. BURN HAZARD Certain unit components operate at Fit all lines into new valve and braze lines into new temperatures hot enough to cause burns. -
Page 37: Compressor Checks
COMPrESSOr ChECKS External Overload WARNING The compressor is equipped with an external overload which senses both motor amperage and winding tem- ELECTRIC SHOCK HAZARD perature. High motor temperature or amperage heats the Turn off electric power before service or installation. Extreme care must be used, if it overload causing it to open, breaking the common circuit becomes necessary to work on equipment with within the compressor. -
Page 38: Compressor Checks
Single Phase resistance Test Many compressor failures are caused by the following WARNING conditions: Improper air flow over the evaporator. ELECTRIC SHOCK HAZARD Turn off electric power before service or Overcharged refrigerant system causing liquid to be installation. Extreme care must be used, if it returned to the compressor. -
Page 39: Compressor Replacement
COMPrESSOr rEPLACEMENT recommended procedure for compressor After all refrigerant has been recovered, disconnect suction and discharge lines from the compressor and replacement remove compressor. Be certain to have both suction WARNING and discharge process tubes open to atmosphere. Carefully pour a small amount of oil from the suction RISK OF ELECTRIC SHOCK Unplug and/or disconnect all electrical power stub of the defective compressor into a clean... - Page 40 SPECIAL PROCEDURE IN THE CASE OF MOTOR COMPRESSOR BURNOUT WARNING ELECTRIC SHOCK HAZARD Turn off electric power before service or installation. Failure to do so may result in personal injury, or death. WARNING HIGH PRESSURE HAZARD Sealed Refrigeration System contains refrigerant and oil under high pressure.
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Page 41: Routine Maintenance
rOUTINE MAINTENANCE NOTICE WARNING Units are to be inspected and serviced by qualified service ELECTRIC SHOCK HAZARD personnel only. Use proper protection on surrounding Turn off electric power before inspections, property. Failure to follow this notice could result in maintenances, or service. moderate or serious property damage. -
Page 42: Routine Maintenance
rOUTINE MAINTENANCE (Continued) NOTICE Do not drill holes in the bottom of the drain pan or the underside of the unit. Not following this notice could result in damage to the unit or condensate water leaking inappropriately which could cause water damage to surrounding property. -
Page 43: Troubleshooting
COOLING ONLY rOOM AIr CONdITIONErS: TrOUBLEShOOTING TIPS Check voltage at compressor. 115V & 230V Low voltage units will operate at 10% voltage variance T-stat not set cold enough or Set t-stat to coldest position. Test t-stat & re- inoperative place if inoperative Compressor hums but cuts off on Hard start compressor. -
Page 44: Wiring Diagrams
COOLING ONLY rOOM AIr CONdITIONErS: TrOUBLEShOOTING TIPS Replace fuse, reset breaker. If repeats, check Fuse blown or circuit tripped fuse or breaker size. Check for shorts in unit wiring & components Power cord not plugged in Plug it in System switch in “OFF” position Set switch correctly Unit does not run Inoperative system switch or open... - Page 45 COOLING ONLY rOOM AIr CONdITIONErS: TrOUBLEShOOTING TIPS Overload inoperative. Opens too Check operation of unit. Replace overload if soon system operation is satisfactory Allow a minimum of 2 minutes to allow Compressor restarted before pressures to equalize before attempting to system pressures equalized restart.
- Page 46 COOLING ONLY rOOM AIr CONdITIONErS: TrOUBLEShOOTING TIPS Sublimation: Ensure that foam gaskets are installed in When unconditioned saturated, between window panes & in between the outside air mixes with conditioned unit & the sleeve. Also, ensure that fresh air, condensation forms on the air/exhaust vents (on applicable models) are in cooler surfaces the closed position &...
- Page 47 hEAT / COOL ONLY rOOM AIr CONdITIONErS: TrOUBLEShOOTING TIPS Disconnect power to unit. Remove resistor from Heat anticipator (resistor) shorted (on applicable t-stat bulb block. Plus in unit & allow to operate. models) Feel resistor for heat. If not heat, replace resistor Room temperature uneven Wide differential - partial loss of t-stat bulb charge Replace t-stat &...
- Page 48 HEAT / COOL ROOM AIR CONDITIONERS: TROUBLE SHOOTING TIPS Incorrect wiring Refer to applicable wiring diagram Defective solenoid coil Check for continuity of coil Block condenser coil & switch unit to cooling. Unit cools when Allow pressure to build up in system, then heat is called for Reversing valve fails to shift switch to heating.
- Page 49 TROUBLESHOOTING CHART — HEATPUMP REFRIGERANT SYSTEM DIAGNOSIS - HEATING CYCLE LOW SUCTION PRESSURE HIGH SUCTION PRESSURE LOW HEAD PRESSURE HIGH HEAD PRESSURE Low Airfl ow Outdoor Ambient Too High Refrigerant System Outdoor Ambient Too High Across Outdoor Coil for Operation in Heating Restriction For Operation In Heating Refrigerant System...
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Page 50: Troubleshooting
TrOUBLEShOOTING TOUCh TEST ChArT: TO SErvICE rEvErSING vALvES NORMAL FUNCTION OF VALVE NOTES: VALVE OPERATING * TEMPERATURE OF VALVE BODY CONDITION ** WARMER THAN VALVE BODY POSSIBLE CAUSES CORRECTIONS Cool Normal Cooling Cool *TVB as (2) as (1) Cool Normal Heating Cool *TVB as (1) - Page 51 ELECTrONIC CONTrOL COOL ONLY MOdELS: XQ05L10A-C XQ06L10A-C XQ08L10A-B,A-E XQ10L10A-C XQ12L10A-B,A-C...
- Page 52 ELECTrONIC CONTrOL COOL ONLY MOdELS: SS08L10-E,-f,-G SS10L10-d,-E SS12L10-E,-f SS14L10-d,-E SS12L30-E,-f SS16L30-d,-E SM18L30A-d,A-E SM21L30-E,-f SM24L30-C,-d...
- Page 53 ELECTrOMEChANICAL CONTrOL COOL ONLY MOdELS: KS12L10-E,-f KS15L10-C,-d KM18L30-C,-d KM24L30-C,-d...
- Page 54 ELECTrOMEChANICAL CONTrOL COOL ONLY MOdELS: SL28L30-d,-E SL36L30A-d,A-E...
- Page 55 ELECTrOMEChANICAL CONTrOL COOL WITh ELECTrIC hEAT MOdEL: EQ08L11A-B,A-E...
- Page 56 ELECTrOMEChANICAL CONTrOL COOL WITh ELECTrIC hEAT MOdELS: ES12L33-d,-E ES16L33-C,-d EM18L34-C EM24L34-B...
- Page 57 ELECTrOMEChANICAL CONTrOL COOL WITh ELECTrIC hEAT MOdELS: EL36L35A-d,A-E...
- Page 58 ELECTrOMEChANICAL CONTrOL hEAT PUMP ONLY MOdELS: YS09L10-f,-G...
- Page 59 ELECTrOMEChANICAL CONTrOL hEAT PUMP WITh ELECTrIC hEAT MOdELS: YS13L33-d,-E YM18L34-d,-E...
- Page 60 ELECTrOMEChANICAL CONTrOL hEAT PUMP WITh ELECTrIC hEAT MOdELS: YL24L35-E,-f...
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Page 61: Instructions For Using Cooling Load Estimate Form
INSTRUCTIONS FOR USING COOLING LOAD ESTIMATE FORM FOR ROOM AIR CONDITIONERS (AHAM PUB. NO. RAC-1) This cooling load estimate form is suitable for estimating the cooling load for comfort air conditioning installations which do not require specifi c conditions of inside temperature and humidity. The form is based on an outside design temperature of 95°F dry bulb and 75°F wet bulb. -
Page 62: Cooling Load Estimate Form
COOLING LOAD ESTIMATE FORM FACTORS BTU/Hr. HEAT GAIN FROM QUANTITY (Quantity x Factor) Outside (Area nside WINDOWS: Heat gain from the sun. Shades* Awnings* X Factor) Shades* Northeast ___ _sq. ft. 20 ____ ____ These factors are for single glass East ___ _sq. -
Page 63: Heat Load Form
HEAT LOAD FORM The heat load form on the following page may be used by Following is an example using the heat load form: servicing personnel to determine the heat loss of a conditioned A space to be conditioned is part of a house geographically space and the ambient winter design temperatures in which located in an area where the lowest outdoor ambient winter the unit will heat the calculated space. - Page 64 HEATING LOAD FORM FRIEDRICH ROOM UNIT HEAT PUMPS BTU/HR PER WALLS: (Linear Feet) °F TEMP. DIFFERENCE 2” Insulation Lin. Ft. x 1.6 Average Lin. Ft. x 2.6 WINDOWS & DOORS (Area, sq. ft.) Single Glass: Sq. Ft. x 1.13 Double Glass: Sq.
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Page 65: Warranty
FIRST YEAR ANY PART: If any part supplied by FRIEDRICH fails because of a defect in workmanship or material within twelve months from date of original purchase, FRIEDRICH will repair the product at no charge, provided room air conditioner is reasonably accessible for service. - Page 67 TECHNICAL SUPPORT CONTACT INFORMATION FRIEDRICH AIR CONDITIONING CO. Post Office Box 1540 · San Antonio, Texas 78295-1540 4200 N. Pan Am Expressway · San Antonio, Texas 78218-5212 (210) 357-4400 · FAX (210) 357-4490 www.friedrich.com Printed in the U.S.A.
- Page 68 FRIEDRICH AIR CONDITIONING CO. Post Office Box 1540 · San Antonio, Texas 78295-1540 4200 N. Pan Am Expressway · San Antonio, Texas 78218-5212 (210) 357-4400 · FAX (210) 357-4490 www.friedrich.com RAC-ServMan (04-09) Printed in the U.S.A.
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