Friedrich K?hl+ EL36M35 Service Manual Download

Page: 68 / 87

ELECTRONIC CONTROL BOARD COMPONENTS IDENTIFICATION

Front

Sample board for Kuhl+ unit

Back

Reversing Valve

Max Speed

High Speed

Med Speed

Low Speed

T-stat Terminals

Transformer voltage
Selector Switch
115/230 Volts

Battery Compartment

User Interface
connector

Transformer
115/230 Volts

DISCHARGE

Summary of Contents for K?hl+ EL36M35

Page 1: ...10 SS14M10 SS12M30 SS15M30 SM18M30 SM21M30 SM24M30 SL28M30 SL36M30 Cool with Electric Heat 208 230 Volt ES12M33 ES15M33 EM18M34 EM24M35 EL36M35 Heat Pump with Electric Heat 208 230 Volt YS12M33 YM18M3...

Page 2: ...Replacing the ID Coil Thermistor 31 Remote Wall Thermostat 32 33 Airflow Selection and Adjustment 33 Components Testing 34 35 Refrigeration Sequence of Operation 36 37 Sealed Refrigeration System Rep...

Page 3: ...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...

Page 4: ...irect 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 flame or hot surfaces can cause ser...

Page 5: ...reful when using acetylene torch and protect surrounding property Fa ilure to follow these instructions can result in fire and minor to serious property damage WATER DAMAGE HAZARDS I mproper installat...

Page 6: ...Key Pad User Interface Chassis Pull Out Handle Base Pan Fan Blade Fan Blower Motor Air Intake Vents Sleeve Condenser Coil Discharge Air Outdoor Grille Accumulator Reversing Valve Model information can...

Page 7: ...E Electric Heat 2nd Digit S Small Chassis M Medium Chassis L Large Chassis 3rd and 4th Digit Approximate BTU HR in 1000s Cooling Heating BTU Hr capacity listed in the Specification Performance Data S...

Page 8: ...m 60 F to 115 F Due to continuing research in new energy saving technology specifications are subject to change without notice As an ENERGY STAR partner Friedrich Air Conditioning Co has determined th...

Page 9: ...e filter clean Make sure that your air conditioner is always in top performing condition y l r a l u g e r r e t l i f e h t g n i n a e l c y b Provide good air flow Make sure the airflow to and from...

Page 10: ...size fuse circuit breaker Read electrical ratings on unit s rating plate Proper circuit protection is the responsibiity of the homeowner Grounding Unit MUST be grounded from branch circuit through ser...

Page 11: ...VOLT NEMA NO SS08M10 SS10M10 SS12M10 SS14M10 YS10M10 15 125 5 15R SS12M30 SS15M30 SM18M30 SM21M30 15 250 6 15R SL25M30 SL28M30 ES12M33 ES15M33 YS12M33 20 250 6 20R SL36M30 EM18M34 EL25M35 EL36M35 YM18...

Page 12: ...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 b...

Page 13: ...n will no longer be visible Filter Reset icon displays the timer may be reset by pressing and holding the button for three 3 seconds A beep indicates the system timer was reset and the icon and the wo...

Page 14: ...hange and exit the selection process SYSTEM FAN MODE FAN SPEED SCHEDULE BACK DISPLAY ENTER EXIT User presses or to select between AUTO DM 20 OFF Press the key to accept the change and exit the selecti...

Page 15: ...ssary To accept the change press the key to return to the TO screen Press the UP to go to the next menu ATSF You may cycle through the menus using the UP or DOWN keys User presses or to increment decr...

Page 16: ...g 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 t...

Page 17: ...d FRR005 SYSTEM TEMPERATURE UP SCHEDULE DISPLAY FAN MODE POWER TEMPERATURE DOWN FAN SPEED FRR006 AUTO ICON SYSTEM MODE FAN MODE FAN SPEED SCHEDULE ICON 2 X 16 SEGMENT DISPLAY COOL ICON HEAT ICON FAN O...

Page 18: ...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 dep...

Page 19: ...ature High Limit Service Only M2 Temperature Low Limit Service Only M3 Test Mode Access Service Only M4 Provision Switch Setting State Factory Use Only M5 Alarms History M6 Factory Use Only Factory Us...

Page 20: ...rent 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 The Following functions Can be Tested 1 System Mode...

Page 21: ...xit 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 n...

Page 22: ...llstat 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 he...

Page 23: ...pump and or electric heat The system set points are mapped to the internal controls as shown below There are 8 stored variable set points in the system 1 ASPC Auto Set Point Cool 2 ASPH Auto Set Point...

Page 24: ...gure below and the compressor is not locked out the cooling cycle begins As shown in the figure below the fan is started 5 seconds prior to the compressor Once the ambient temperature has been lowered...

Page 25: ...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 f...

Page 26: ...n the electric heater until the initial set point is satisfied Hot Start Feature After the initial start the unit will switch to Heat Pump heat and decide between Heat Pump heat and Electric heat base...

Page 27: ...nd 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...

Page 28: ...during Test Mode Heating Fan Delay This is only for fan Mode Auto Fan cycles with cool heat operation and not for continuous fan mode When unit cycles Heating ON starts the fan 5 seconds EARLY When u...

Page 29: ...point or heat set point vs ambient temperature When there is no demand operate at the lowest available speed Fan AUTO Turns On or Off with heat or cool demand Turns On or Off with heat or cool demand...

Page 30: ...ce ICON is displayed if a malfunction is detected Cool Heat Fan modes and Fan speed operations are controlled by the remote wall thermostat The fan speeds can be Low or Max for 4 speed units and Low o...

Page 31: ...ive front cover See figure at left Remove the chassis Entrygard Retainer Wire by removingthescrewatthefrontrightbottomcornerscrew See Figure below Save this screw for reattachment after reinstalling t...

Page 32: ...screws indicated below Pull control board and mount plate out and disconnect the following connectors from it Power capacitor thermistors fan reversing valve and heater Remove the hex screw holding th...

Page 33: ...single speed fan control The RT5 features a digital display two fan speed selection filter check light temperature limiting status indicator light room temperature offset backlight and battery backup...

Page 34: ...outputs are listed as F1 and F2 on the interface connector See page 32 To connect the relay simply wire one side of the relay to F1 and the other side to F2 Anytime that the fan runs the terminals wil...

Page 35: ...Therefore the possibility of capacitor failure is much greater when the identified terminal is connected to the S or start terminal The identified terminal should always be connected to the supply lin...

Page 36: ...ted at a predetermined temperature to bring on the heating element and turn off the compressor The room Heating Element Sample TESTING THE HEATING ELEMENT Testing of the elements can be made with an o...

Page 37: ...densed changed to a Liquid before leaving the condenser coil The refrigerant leaves the condenser Coil through the liquid line as a warm high pressure liquid It next will pass through the refrigerant...

Page 38: ...R 410A equipment To prevent moisture absorption and lubricant contamination do not leave the refrigeration system open to the atmosphere longer than 1 hour Weigh in the refrigerant charge into the hi...

Page 39: ...erload failure SealedRefrigerationSystemcontainsrefrigerant and oil under high pressure Proper safety procedures must be followed and proper protective clothing must be worn when working with refriger...

Page 40: ...FREEZE HAZARD Proper safety procedures must be followed and proper protective clothing must be worn when working with a torch Failure to follow these procedures could result in moderate or serious in...

Page 41: ...he evaporator will not be encountered because the refrigerant will boil later if at all Gauges connected to system will usually have higher head pressure depending upon amount of over charge Suction p...

Page 42: ...ith a partial restriction there may be gurgling sounds at the metering device entrance to the evaporator The evaporator in a partial restriction could be partially frosted or have an ice ball close to...

Page 43: ...opposite port liquid line to the indoor coil Refer to refrigerant flow chart This directs the refrigerant through the filter drier and cooling capillary tube to the indoor coil In the heating mode of...

Page 44: ...pressure suction side of the system The other two are connected to the indoor and outdoor coils Small capillary tubes connect each end of the main valve cylinder to the A and B portsofthepilotvalve A...

Page 45: ...ish or stuck in the mid position part of the discharge gas from the compressor is directed back to the suction side resulting in excessively high suction pressure ELECTRIC SHOCK HAZARD WARNING Unplug...

Page 46: ...all excess braze from all tubing so that they will slip into fittings on new valve 5 Remove solenoid coil from new valve The use of a torch requires extreme care and proper judgment Follow all safety...

Page 47: ...ed in the motor windings to sense the winding temperature and or current draw The overload is connected in series with the common motor terminal Should the internal temperature and or current draw bec...

Page 48: ...ng for sometime a careful examination must be made to determine why the compressor failed Many compressor failures are caused by the following conditions 1 Improper air flow over the evaporator 2 Over...

Page 49: ...ystem will need to be cleaned up following proper procedures 7 Install the replacement compressor 8 Pressurize with a combination of R 410A and nitrogen and leak test all connections with an electroni...

Page 50: ...frigerant and oil from the system Remove compressor capillary tube and filter drier from the system Flush evaporator condenser and all connecting tubing with dry nitrogen or equivalent Use approved fl...

Page 51: ...weekly and cleaned if needed by vacuuming with a dust attachment or by cleaning in the sink using warm water and a mild dishwashing detergent Dry the filter thoroughly before reinstalling Use caution...

Page 52: ...gasoline benzene etc Use a damp not wet cloth when cleaning the control area to prevent water from entering the unit and possibly damaging the electronic control CLEARANCES Inspect the surrounding ar...

Page 53: ...IP TOP TAB FRONT FRAME WITH STANDARD MESH FILTER A Figure 1 Figure 3 Figure 4 Figure 2 STEP 4 NOTE the tab in the frame stops the handle from sliding in sl 3 ide the STEP 5 the inside of the front doo...

Page 54: ...a wall is quieter than one mounted in a window It is important to ensure that the chassis seal gasket is properly installed refer to installation instructions Heat pumps operate differently If your u...

Page 55: ...ocedures Installation information Referrals to Authorized Service Providers and Parts depots Available Accessories DC 2 Drain Kit Part No 01900235 In some installations excess condensate water caused...

Page 56: ...d use back of sheet for explanation E LE C TR IC AL LINE VOLTAGE STATIC VOLTS START UP VOLTAGE VOLTS AMPERAGE DRAW AMPS COOL AMPERAGE DRAW AMPS HEAT C OMPR E S S OR LOCKED ROTOR AMPS AMPS AMPERAGE DRA...

Page 57: ...ter Run high fan speed until temp is 100 F Resume operation Third occurance in 1 hour locks unit out 13 Flash Prerssure Limit Switch Open If unit is cooling or heat pump on shut down compressor Run hi...

Page 58: ...CDI power cord can trip Reset button pops out due to disturbances on your power supply line Press and release RESET listen for click Reset button latches and remains in to resume normal operation Elec...

Page 59: ...rs are sized to meet the cooling load and heater size is then selected to meet the heating load In extreme northern climates room air conditioners may not be able to be used as a primary source of hea...

Page 60: ...es not run Inoperative system button Test button replace user interface if inoperative Broken loose or incorrect wiring Refer to applicable wiring diagram Open capacitor Test capacitor replace if inop...

Page 61: ...motor replace if inoperative Partially restricted capillary tube De ice coil Replace capillary tube e s u a C e l b i s s o P m e l b o r P Compressor runs continually does not cycle off Excessive hea...

Page 62: ...d Incorrect wiring Refer to appropriate wiring diagram Defective thermistor Replace thermistor or electronic control board e s u a C e l b i s s o P m e l b o r P Noisy operation Poorly installed Refe...

Page 63: ...rier in building structure particularly floors Advise customer e s u a C e l b i s s o P m e l b o r P Unit short cycles Defective thermistor Replace thermistor or electronic control board Unit oversi...

Page 64: ...stor refrigerant circuits etc For proper operation correct as needed Temperature below 32 F 0 C e s u a C e l b i s s o P m e l b o r P Does not heat adequately Exhaust or fresh air door open Check if...

Page 65: ...ture rise across coil Refer to specification sheet for correct temperature rise Reversing valve failing to shift completely bypassing hot gas Denergize solenoid coil raise head pressure energize solen...

Page 66: ...nsables air in System Overcharged Low Airflow Across Indoor Coil Outdoor Ambient Too High For Operation In Heating Moisture in System Defective Compressor Defective Compressor Undercharged Overcharged...

Page 67: ...sal Hot Warm Warm Hot TVB Hot Not enough pressure differential at start of stroke or not enough fl ow to maintain pressure differential Check unit for correct operating pressures and charge Raise head...

Page 68: ...ATION Front Sample board for Kuhl unit Back Reversing Valve Max Speed High Speed Med Speed Low Speed T stat Terminals Transformer voltage Selector Switch 115 230 Volts Battery Compartment User Interfa...

Page 69: ...t Field Provided Field Wiring COOL WITH ELECTRIC HEAT Jumper Wire GH GL O B Y W RC RH C C GH GL B W Y R 24 VAC Connections RT5 Thermostat Electronic Control Board COOL W O ELECTRIC HEAT Jumper Wire GH...

Page 70: ...GREEN YELLOW WHITE MOTOR BROWN WHITE WHITE BLACK GREEN TO INNERWALL MOTOR MOUNT BLUE ORANGE RED UI HOLDER ELECTRONICS ASY WIRING DIAGRAM HEATER ELEMENT INSULATOR GROUNDED LEAD SYMBOL COMBINATION TERMI...

Page 71: ...LACK RED BLUE UI HOLDER ELECTRONICS ASY WHITE BROWN MOTOR WHITE GREEN TO INNERWALL MOTOR MOUNT OR GREEN YELLOW GREEN SUPPLY CORD BRACKET TO CAPACITOR BLACK LOW F2 2 SSR 2 1 4 3 WHITE BLUE SOLID STATE...

Page 72: ...T HIGH ELECTRIC HEAT MEDIUM SCHEMATIC 1 2 3 7 L2 OR N EH2 COMP ELECTRONIC CONTROL 6 EH1 HTR TF COMPRESSOR OLP HL S R CAP COMPRESSOR HERM COM CAP LOW 230 208 V C S R 04 PART NO REV 92170002 5 L1 H E R...

Page 73: ...E E N Y E LLOW TO CAPACITOR BR ACKE T S UPP LY COR D S C R OLP S S R S CHE MATIC US E R INTE R FACE FAN MTR FAN COM CAP C OMPR E S S OR HE R M COM CAP OLP HL TF HTR CAPACITOR THE R MIS TE R T HL TF U...

Page 74: ...KET CAPACITOR RED COM CAPACITOR GREEN BLACK OLP S BLACK RED BLUE COMPRESSOR R C UI HOLDER ELECTRONICS ASY BLUE BLUE COIL SOLENOID BLACK CAP COM HERM COMPRESSOR OLP CAP COM FAN FAN MTR OLP 04 REV PART...

Page 75: ...PACITOR COM H E R M RED BLUE RED BRACKET WHITE GREEN WHITE OR GREEN YELLOW TO CAPACITOR SUPPLY CORD F A N BLACK WIRING DIAGRAM RED ORANGE HEATER 230 208 V L2 NEUTRAL 115 V CAP COM HERM COMPRESSOR OLP...

Page 76: ...COMPRESSOR BLACK SOLID STATE RELAY WHITE YELLOW BLACK CAPACITOR COM H E R M F A N RED CAPACITOR BRACKET TO CHASSIS BLUE GREEN MOTOR MOUNT TO INNERWALL GREEN BROWN WHITE WHITE WHITE BLACK GREEN OR GREE...

Page 77: ...97 14 043 2 53 2 53 66 13 004 13 335 13 666 2 48 2 48 67 12 668 12 984 13 301 2 44 2 44 68 12 341 12 644 12 947 2 39 2 39 69 12 024 12 313 12 603 2 35 2 35 70 11 716 11 993 12 269 2 31 2 31 71 11 418...

Page 78: ...ind the prefix of your AC unit s model D Note the Option Code OPT next to it and the required action The unit s display is supposed to show this OPT Code Model Prefix Option Code Required Action SS SM...

Page 79: ...ol s OPT Code see example below Fig 2 Using the Remote Control s S Increase or d Decrease Keys change the OPT Code displayed on the Remote Control to match the OPT Code shown on the Air Conditioning U...

Page 80: ...eptacle Contents User Interface UI Ribbon Cable 2 Mounting screws for UI Instruction Sheet Step 1 Disconnect ribbon cable by pulling straight out Step 2 Remove 2 mounting screws securing UI and discon...

Page 81: ...n thickness is considered Light Construction An insulated wall or masonry wall over 8 inches in thickness is considered Heavy Construction 3b Multiply the total length linear feet of all inside walls...

Page 82: ...AR FEET OF WIDTH 9 SUBTOTAL 10 TOTAL COOLING LOAD BTU per hour to be used for selection of room air conditioner s No Shades 60 80 75 75 110 150 120 0 ____sq ft ____sq ft ____sq ft ____sq ft ____sq ft...

Page 83: ...he unit capacity line intersect read down to the outdoor ambient temperature scale and find that this unit will deliver the required BTU Hr capacity to approximately 30 F The heat load form on the fol...

Page 84: ...2 insulated Sq Ft x 0 10 Built up Roof 1 2 insulated Sq Ft x 0 20 No Insulation Sq Ft x 0 33 FLOOR Area Sq Ft Above Vented Crawl space Insulated 1 Sq Ft x 0 20 Uninsulated Sq Ft x 0 50 Slab on Ground...

Page 85: ...stallation wiring electrical current characteristics or maintenance or caused by accident misuse or abuse fire flood alterations and or misapplication of the product and or units installed in a corros...

Page 86: ...Box 1540 San Antonio Texas 78295 1540 4200 N Pan Am Expressway San Antonio Texas 78218 5212 210 357 4400 877 599 5665 x 846 FAX 210 357 4490 Email tac friedrich com www friedrich com Printed in the U...

Page 87: ...an 5 10 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...

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