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Friedrich KUHL R-410A User's Manual

1. Bussa 21 OO Hear Sa POMS MIR 22 Electronic Control Sequence of Operation iccccicccaccvocncscessnceewesingssunescodeeceadendgeceepsaceteesandsaveeseecaddverseveanesiciondddysscestieees 23 29 Unit Operation with a Wall Stat 29 Removing the Front Cover and Unit 30 Replacing the ID Coll ir quo MR u u Laatu __ 31 Replacing the Control Board P tcc ws Send ee 31 Low Voltage Interface 92 Replacing the ID Coil Thermistor 31 micas m Wall uu uu uuu uuu u ua qaq qaku 32 33 Airflow Selection and Adjustment 33 SOI ORIG TIS TOSUN can cs T UE 34 35 Refrigeration Sequence of Operation TE 36 37 Sealed Refrigeration System Repairs 38 41 Hermetics Components u UU 42 Reversing Valve Description Operation 43 Testing he Gollu uu _ __ gt 44 Checking the Reversing Valve 44 45 ROMP SS SOF u
2. o 46 47 Compressor Replace 48 49 Routine Maintenance Battery Check 50 53 SOIMCE alid FSS SANG G uuu uu unu uuu 54 Performance Test Data Sheet and SIZING Guide 55 Eor Codes and Alarm Status UU US LIL n asss m 56 Toupee TERES 57 66 Electronic Control Board Components Identification 67 Piae D NNN NETTE EE 68 75 Thermistors Resistance Values NE Tm c 76 Remote Control Replacement Instructions 4 nennen nenne nnne nent nns 77 78 User Interface Service Kit dened 79 instructions Ter Using Cooling Load Estimate Form a den p 80 COOMO Load TE SUAS Foi Tm 81 acie zem 82 83 liq e 84 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 tes
3. Figure 1 npo EEUU rt LIT TILL v e A FP 2 FI D c B Y W R sees THERMOSTAT WIRE ROUTING USE 18 AWG COLORED THERMOSTAT WIRE TO REMOTE THERMOSTAT Table 1 Interface Connector Definitions Front Panel Wire jumper between FP and F2 enables front panel operation Jumper off enables remote wall t stat operation Used with F1 to provide 24 VAC to external fan relay See above for use with FP Used with F2 to provide 24 VAC to external fan relay Used with D1 for desk control on or off D2 operation Used with D2 for desk control on or off D1 operation can for neat pump reversing vane ___ 24V Power from Electronic Control to Wall Adding a Remote Wall Thermostat An external thermostat may be added to the air conditioner to provide remote temperature sensing and control Thermostat Selection Friedrich recommends the use of either the Friedrich RT4 or RT5 These thermostats are single stage heat cool manual changeover The RT4 is a digital display thermostat with 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 Other thermostats may be used as long as they are single stage heat cool and are configured correctly for the unit Thermostat terminals requirements For cooling on
4. il Fu iy H Remove the screws indicated at the side and back plate 6 total see figure below Partially lift the top cover and at the same time carefully swing out from the top the back and side plate Replace the indoor coil sensor Ensure to properly clip and insulate it at the same location see figure below A WARNING ELECTRIC SHOCK HAZARD Disconnect power to the unit before servicing Failure to follow this warning could result in serious injury or death Remove the decorative front cover see page 30 Disconnect discharge sensor plug red Disconnect the User Interface plug white Remove the 3 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 the control board to its mount plate Pull out the control board see figure below 31 32 Low Voltage Interface Connector WARNING ELECTRIC SHOCK HAZARD Disconnect power to the unit before servicing Failure to follow this warning could result in serious injury or death All Kuhl and Kuhl units have a low voltage interface connector through which a Remote Wall Thermostat Desk Control and Auxiliary Fan s Relay can be connected The interface connector is located on the left side behind the decorative front cover Interface Connector Location
5. Cool Threshold 1 a x Set Point Cool Demand Cycle Trigger icc ted Compressor On Delay 5 Sec Off Fan Delay 30 Cooling Control 23 24 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 Satisfied Point Set point 25 F the compressor is turned off The fan is turned off 30 seconds later The figure below illustrates the basic heat pump operation Set Point Heat Demand Threshold 2 A Temp Below Set Point Heat Demand Cycle Reversing Valve Heat Pump Fan Off Delag30 14 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 be low 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 compres
6. Q 0 COMPRESSOR z c COMPRESSOR L1 3 COMP HERM COM FLECTRONIC CONTROL _ 7 LEGEND CAPACITOR THERMISTER COMPRESSOR FAN MOTOR COMBINATION TERMINAL OVERLOAD PROTECTOR GROUNDED LEAD SYMBOL USER INTERFACE INSULATOR THERMAL FUSE HEATER ELEMENT HEATER LIMIT FUSE PART NO REV 92170000 04 69 KUHL ELECTRONIC CONTROL COOL ONLY MODELS SL28M30A SL36M30A COMPRESSOR WIRI NG DIAG RAM UI HOLDER ELECTRONICS ASY OD AIR SENSOR OD COIL SENSOR ID COIL SENSOR SOLID STATE RELAY WHITE AMBIENT AIR SENSOR TO INNERWALL WF MOTOR MOUNT SCHEMATIC NEUTRAL 115 V 12 230 208 V HIGH MEDIUM LOW D D YR OLP we COMPRESSOR Z gt COMPRESSOR 5 COMP 70 0 HERM ELECTRONIC CONTROL 1 L1 COM AP LEGEND CAP CAPACITOR THERMISTER COMPR COMPRESSOR MTR FAN MOTOR e COMBINATION TERMINAL OLP OVERLOAD PROTECTOR GROUNDED LEAD SYMBOL Ul USER INTERFACE O INSULATOR TF THERMAL FUSE HTR HEATER ELEMENT HL HEATER LIMIT FUSE PART NO REV 92170001 04 KUHL ELECTRONIC CONTROL COOL WITH ELECTRIC HEAT MODELS ES12M33A ES15M33A EM18M34A EM24M34A COMPRESSOR HEATER I ORANGE CAPACITOR CAPACITOR BRACKET TO CHASSIS BLUE TO INNERWALL MOTOR MOUNT SCHEMATIC 9 ELECTRIC HEAT ml HL ELECTRIC HEAT COMPRESSOR COMP
7. TO CAPACITOR TO CHASSIS BRACKET BLUE TO INNERWALL SCHEMATIC 0 NEUTRAL 115 V USER INTERFACE L2 230 208 V 9 MEDIUM N 0000 rm LOW 2 2 e FAN COM gt ELECTRIC HEAT CAP HL ELECTRIC HEAT HTR REVERSING CYCLE RV OLP 00000 RV BUT COMPRESSOR 9 COMPRESSOR ELECTRONIC CONTROL gt gt s HERM CAP LEGEND CAP CAPACITOR 10000 REVERSING VALVE COMPR COMPRESSOR THERMISTER MTR MOTOR OLP OVERLOAD PROTECTOR COMBINATION TERMINAL Ul USER INTERFACE Ji GROUNDED LEAD SYMBOL TF THERMAL FUSE O INSULATOR PART NO REV 92170004 04 HL HEATER LIMIT FUSE HTR HEATER ELEMENT KUHL ELECTRONIC CONTROL HEAT PUMP WITH ELECTRIC HEAT MODEL COMPRESSOR YL24M35A WIRING DIAGRAM UI HOLDER ELECTRONICS ASY OUTDOOR AIR SENSOR OUTDOOR COIL SENSOR SOLID STATE RELAY INDOOR COIL SENSOR Or HEATER BLACK 556 3 THO 2 E SOLID STATE RELAY DSCHRG AIR SENSOR RED L2 or ACN lE _____ id Ee has Tun I L WHITE WHITE f BROWN GREEN BRACKET TO CHASSIS BLUE SCHEMATIC L2 RV L1 5 COMP ELECTRONIC CONTROL _ X CLOSED SWITCH LOGIC o open 5 Je ______
8. 2 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 Failure to adhere to this precaution may cause premature equipment malfunction Once plugged in the unit will operate normally without the need to reset the LCDI device Ifthe LCDI device fails to trip when tested or if the power supply cord is damaged it must be replaced with a new power supply cord from the manufacturer Contact our Technical Assistance Line at 800 541 6645 To expedite service please have your model number available Table 1 CIRCUIT RATING REQUIRED OR TIME DELAY WALL FUSE RECEPTACLE 5508 10 5510 10 5512 10 5514 10 15 125 5 15R YS10M10 5512 30 5515 30 6 15R SM18M30 SM21M30 SL25M30 SL28M30 ES12M33 ES15M33 6 20R YS12M33 SL36M30 18 34 30 250 6 30R EL25M35 EL36M35 YM18M34 YL24M35 Figure 1 OO WARNING TEST BEFORE EACH USE 1 PRESS RESET BUTTON 2 PLUG INTO POWER RECEPTACLE WARNING TEST BEFORE EACH USE E PRESS RESET BUTTON 2 PLUG LEDI INTO POWER 3 PRESS TEST BUTTON RESET BUTTON SHOULD 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 4 PRESS TEST BUTTON FOR U DO NOT USE IF ABOVE TEST FAILS WHEN GREEN LIGHT IS ON IT IS
9. A WARNING HIGH PRESSURE HAZARD Sealed Refrigeration System contains refrigerant and oil under high pressure Proper safety procedures must be followed and proper protective clothing must be worn when working with refrigerants Failure to follow these procedures could result in serious injury or death 2 Recover all refrigerant from the system though the process tubes PROPER HANDLING OF RECOVERED REFRIGERANT ACCORDING TO EPA REGULATIONS IS REQUIRED Do not use gauge manifold for this purpose if there has been a burnout You will contaminate your manifold and hoses Use a Schrader valve adapter and copper tubing for burnout failures WARNING HIGH TEMPERATURES Extreme care proper judgment and all safety procedures must be followed when testing troubleshooting handling or working around unit while in operation with high temperature components Wear protective safety aids mmm such as gloves clothing etc Failure to do so could result in serious burn injury NOTICE FIRE HAZARD The use of a torch requires extreme care and proper judgment Follow all safety recommended precautions and protect surrounding areas with fire proof materials Have a fire extinguisher readily available Failure to follow this notice could result in moderate to serious property damage 3 After all refrigerant has been recovered disconnect suction and discharge lines from the compressor and remove compressor Be c
10. BZ appears next to the button The alert is issued when the fan run time is greater than 500 hours This alert may be reset by the user Refer to Special Functions Filter Reset Maintenance Required When maintenance is required a service icon appears on screen This icon will not be dismissed until maintenance has been performed If the service icon flashes maintenance is required and must only be performed by qualified service personnel When the icon is on standby the system has sensed an abnormal condition For example The air in out louvers may be blocked Once proper air flow is established the service icon goes away Wait The WAIT icon illuminates when the compressor lockout is active 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 Z 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 Ed is off Once the timer has cleared the air conditioner will heat or cool based on the temperature setting Electric heat is not affected by this timer Protection Alert Freeze If the room freeze protection is active the display indicates this by showing Room Freeze Protection FRZ Once
11. FAN 4 Max Speed RELAY H RELAY Qu E FAN 1 DISCHARGE Transformer AIR TO 115 230 Volts L2 or ACN Transformer voltage Selector Switch 115 230 Volts 1 Sample board for Kuhl unit REMOTE WALL THERMOSTAT WIRING DIAGRAMS LEGEND FORT STAT WIRING HARNESS Common Terminal CMfoHghRn et GaWeowhm B ReversingValve CY Call for Heat R 24 VAC Power From Unit RT5 Two Speeds Fan T Stat Field Provided Field Wiring COOL W O ELECTRIC HEAT COOL WITH ELECTRIC HEAT Electronic Control Board 24 VAC Connections lenlet ely w R Electronic Control Board 24 VAC Connections HEAT PUMP ONLY AND HEAT PUMP WITH ELECTRIC HEAT Electronic Control Board 24 VAC Connections Jumper ooa Wire cH et o B Y 68 KUHL ELECTRONIC CONTROL COOL ONLY MODELS SSO8M10A SS10M10A SS12M10A SS14M10A SS12M30A 5515 SM18M30A SM21M30A SM24M30A WIRING DIAGRAM COMPRESSOR UI HOLDER ELECTRONICS ASY OD AIR SENSOR OD COIL SENSOR ID COIL SENSOR DCHRG AIR TO SENSOR DISPLAY t NI AMBIENT AIR SENSOR SUPPLY CORD CAPACITOR OR GREEN YELLOW TO CAPACITOR TO INNERWALL MOTOR MOUNT SCHEMATIC NEUTRAL 115 V T USER INTERFACE L2 230 208 V LOC 5 Q N 9 F3 OLP FAN MTR MEDIUM 72 YC CAP OLP
12. Accurate refrigerant charge measuring device such as a Balance Scales 1 2 oz accuracy b Charging Board 1 2 oz accuracy WARNING RISK OF ELECTRIC SHOCK Unplug and or disconnect all electrical power to the unit before performing inspections maintenances or service Failure to do so could result in electric shock serious injury or death Proper safety procedures must be followed and proper protective clothing must be worn when working with refrigerants Failure to follow these procedures could result in serious injury or death Refrigerant Charging NOTE Because the RAC system is a sealed system service process tubes will have to be installed First install a line tap and remove refrigerant from system Make necessary sealed system repairs and vacuum system Crimp process tube line and solder end shut Do not leave a service valve in the sealed system 38 9 High Pressure Gauge 0 to 750 Ibs 10 Low Pressure Gauge 30 to 200 Ibs 11 Vacuum Gauge 0 1000 microns 12 Facilities for flowing nitrogen through refrigeration tubing during all brazing processes EQUIPMENT MUST BE CAPABLE OF 1 Recovering refrigerant to EPA required levels 2 Evacuation from both the high side and low side of the system simultaneously 3 Introducing refrigerant charge into high side of the system 4 Accurately weighing the refrigerant charge introduced into the system Proper refri
13. Do not start unit with solenoid coil removed from valve or do not remove coil after unit is in operation This will cause the coil to burn out CHECKING THE REVERSING VALVE NOTE You must have normal operating pressures before A WARNING HIGH PRESSURE HAZARD Sealed Refrigeration System contains refrigerant and oil under high pressure Proper safety procedures must be followed and proper protective clothing must be worn when working with refrigerants Failure to follow these procedures could result in serious injury or death Check the operation of the valve by starting the system and switching the operation from Cooling to Heating and then back to Cooling Do not hammer on valve Occasionally the reversing valve may stick in the heating or cooling position or in the mid position When sluggish 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 Should the valve fail to shift from coooling to heating block the air flow through the outdoor coil and allow the discharge pressure to build in the system Then switch the system from heating to cooling If the valve is stuck in the heating position block the air flow through the indoor coil and allow discharge pressure to build in the system Then switch the system from heating to cooling Should the valve fail to shift in either position after increasi
14. HERMETIC COMPONENTS CHECK A WARNING BURN HAZARD Proper safety procedures must be followed 2a and proper protective clothing must be worn when working with a torch AOH aT Failure to follow these procedures could result in moderate or serious injury METERING DEVICE Capillary Tube Systems All units are equipped with capillary tube metering devices Checking for restricted capillary tubes 1 Connect pressure gauges to unit 2 Start the unit in the cooling mode If after a few minutes of operation the pressures are normal the check valve and the cooling capillary are not restricted CHECK VALVE A unique two way check valve is used on the reverse cycle heat pumps It is pressure operated and used to direct the flow of refrigerant through a single filter drier and to the proper capillary tube during either the heating or cooling cycle One way Check Valve Heat Pump Models X WARNING CUT SEVER HAZARD Be careful with the sharp edges and corners Wear protective clothing and gloves etc Failure to do so could result in serious injury 3 Switch the unit to the heating mode and observe the gauge readings after a few minutes running time If the system pressure is lower than normal the heating capillary is restricted 4 Ifthe operating pressures are lower than normal in both the heating and cooling mode the cooling capillary is restricted In the heating mode of operation hig
15. and oil under high pressure Proper safety procedures must be followed and proper protective clothing must be worn when working with refrigerants Failure to follow these procedures could result in serious injury or death NOTICE FIRE HAZARD The use of a torch requires extreme care and proper judgment Follow all safety recommended precautions and protect surrounding areas with fire proof materials Have a fire extinguisher readily available Failure to follow this notice could result in moderate to serious property damage 1 Install Process Tubes Recover refrigerant from sealed system PROPER HANDLING OF RECOVERED REFRIGERANT ACCORDING TO EPA REGULATIONS IS REQUIRED 2 Remove solenoid coil from reversing valve If coil is to be reused protect from heat while changing valve 3 Unbraze all lines from reversing valve 4 Clean all excess braze from all tubing so that they will slip into fittings on new valve 5 Remove solenoid coil from new valve 6 Protectnew valve body from heat while brazing with plastic heat sink Thermo Trap or wrap valve body with wet rag 7 Fit all lines into new valve and braze lines into new valve WARNING EXPLOSION HAZARD The use of nitrogen requires a pressure regulator Follow all safety procedures and wear protective safety clothing etc Failure to follow proper safety procedures could result in serious injury or death 8 Pressurize sealed system
16. of your unit s model C Look at the chart below and in it find 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 OPT 1 None Remote Control configured for use with air conditioner 2 Perform Steps 2 5 YS YM YL ES EM EL OPT 3 Perform Steps 2 5 Step 2 Point the Remote Control at Air Conditioning Unit and then press the Remote Control s 01114 1 Key once to illuminate the Air Conditioning Units display Step 3 Once the display on the Air Conditioning Unit is illuminated check the Option Code number OPT shown in the display and ensure it matches the OPT code for your unit as per the chart above Air Conditioner Unit s Display see example below Fig 1 OPT1 OPT2 OPT3 Displayed example mu 1 4 mi aM na Figure 1 ff 4 FRIEDRICH K hl Remote Control Step 4 Checking the Remote Control s OPT Code With the Remote Control s display illuminated press and hold the Remote Control s and the Keys simultaneously for approximately 6 seconds until the Remote Control displays its current OPT Code If the OPT Code is different than the AC Unit s OPT Code see instructions below Remote Control Remote Control s OPT Code see example below Fig 2 Figure 2 9 FRIEDRICH Using the Remote Control s Increase or De
17. use valve with smaller ports Raise head pressure operate solenoid Hot Hot Hot Hot Hot Hot Both ports of pilot open If no shift replace valve in heat as 1 as 2 If excessive leak replace valve eap In Hot Cool zs Operate valve several times then recheck ing Hot Cool WVB WVB Pilot needle and piston needle leaking I as 1 as 2 If excessive leak replace valve Hot Hot Cool TVB TVB Pressure differential too high Stop unit Will reverse during equalization as 1 as 2 period Recheck system Raise head pressure operate solenoid to Raise head pressure operate solenoid Hot Cool Remove valve and wash out Check on air Hot Cool H 1 2 Hot Dirt in bleeder hole before reinstalling if no movement replace Will not shift valve Add strainer to discharge tube Mount valve horizontally from heat to Stop unit After pressures equalize restart cool Hot Cool with solenoid deenergized If valve shifts Hot Cool as 1 as 2 Hot TVB Piston cup leak reattempt with compressor running If it still will not reverse while running replace the valve Hot Cool Cool as 1 as 2 Defective pilot Replace valve Warm Cool Warmi o Warm TVB Defective compressor Replace compressor as 1 as 2 Piston cup leak 66 ELECTRONIC CONTROL BOARD COMPONENTS IDENTIFICATION Front Back OD AIR SENSOR OD COIL SENSOR I 4 10 COIL SENSOR
18. Discharge Suction Sub PRESSURES FUSE Discharge TEMP DEG F Temp Temp Super Heat Cooling Suction Discharge AMPS Amps Locked Rotor Charge in Voltage G0 Hertz Drop F Cool Heat Amps OZ Amps SS08M10 A 53 115 157 62 12 31 151 400 6 1 32 0 24 0 115 15 S10M10 A 2 _ 449 150 6 45 28 145 455 ao 50 50 15 1 M10 A ___50 118 163 60 12 23 137 435 100 570 350 115 415 S14M10 A 49 421 170 56 10 22 132 425 120 60 290 115 15 1166 158 62 13 21 142 40 48 300 330 230208v 15 121 4 28 18 40 64 320 325 230208 v 15 27 30 4 S10M10 A 56 24 4 26 122 16 6 9 31 14 450 74 S12M30 A 49 S12M33 A 51 S12M33 A S15M30 A 53 S15M33 A 53 52 9 56 9 51 9 53 53 54 54 0 8 6 6 56 7 51 18 30 54 O M18M34 A 54 122 160 62 15 450 74 195 420 550 230 208 30 M18M34 A 118 168 6 M21M30 A 28 137 455 94 460 550 230 208 15 M24M30 A 128 495 110 470 400 230207 20 M24M34 A 128 495 110 470 400 23020 30 L24M34 A 56 L28M30 A 133 430 135 600 785 230 208v L36M30 A ____51 122 470 190 90 770 230208 Rating Conditions 80 degrees F room air temp amp 50 relative humidity with
19. 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 for 3 seconds the TIME selection appears Use the UP or DOWN buttons to scroll through the User Menu Press the 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 EXIT TTM DISPLAY ENTER The hour digits flash first The user presses the F hd 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 s The minutes digits flash The user presses the P 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 u
20. WORKING PROPERLY 15 20A LCDI Device 30A LCDI Device FRROO1 Control Panel Operation Let s check out how to control your air conditioner On the control panel just to the left of the POWER 0 is liquid crystal display LCD All of the control panel function buttons and mode icons can be viewed in Figure 1 Power On Press the button to turn on the air conditioner The power button will illuminate to indicate the power is on The backlight on the power switch will automatically dim to 20 intensity after 120 seconds of inactivity The remote control can also be used to turn power ON OFF See Remote Control Display The display is a high efficiency LCD with a built in white back light The back light has an automatic two 2 step dim function After 120 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 Button Allows the user to sequentially select Cool Ed HEAT and FAN ONLY Bi operation Press the button and the display advances to the next mode A new icon appears Atthe same time the mode displays for two 2 seconds then returns the display to the temperature set point for modes other than FAN Note that on cool only units there are no HEAT modes FAN MODE Button Selects between au
21. amp does Refrigerant leak Find leak and repair not cycle off Check operation of t stat Replace if contacts Compressor relay contacts stuck remain closed Remote wall T stat incorrectly wired Refer to appropriate wiring diagram Thermistor shorted Replace thermistor or electronic control board Possible Cause Possible Solution Compressor relay contacts stuck Replace electronic control board Turn to higher temp setting to see if unit Electronic control Temperature set at coldest point 9 P 9 board does not cycles off If not replace control board turn unit off w Incorrect wiring Refer to appropriate wiring diagrams Unit undersized for area to be Refer to industry standard sizing chart Defective thermistor Replace thermistor or electronic control board COOLING ONLY ROOM AIR CONDITIONERS TROUBLESHOOTING TIPS Overload inoperative Opens too Check operation of unit Replace overload if soon system operation is satisfactory Compressor restarted before system pressures equalized Control s default of 3 minutes wait delay timer inoperative Replace board Compressor runs for short periods only Cycles on Low or fluctuating voltage Check voltage with unit operating Check for other appliances on circuit Air conditioner should be in a dedicated circuit for proper voltage amp fused separately overload Incorrect wiring Shorted or incorrect capacitor Refer to appropriate wiring diagram Te
22. doors windows etc ATSF room air sampling feature disabled Enable ATSF Problem Possible Cause Possible Solution Bad outdoor coil thermistor Replace thermistor Unit will not defrost heat pumps with electric heat no action needed Heat pump model 5 10 do not operate below 32 F 0 C only models Temperature below 32 F 0 C If outdoor air temp is higher than freezing check reversing valve electric coil outdoor thermistor refrigerant circuits etc For proper operation correct as needed Problem Possible Cause Possible Solution Check if operating properly Instruct customer on proper use of control Dirty filter Clean as recommended in Owner s Manual Check heat rise across coil If unit operates efficiently check if insulation can be added to attic or walls If insulation is adequate Does not heat recommend additional unit or larger one adequately Exhaust or fresh air door open Unit undersized Outdoor coil thermistor or electronic control Check alarms error codes Replace thermistor board defective or electronic control board Check for adequate fan air across heater Check Heater hi limit control cycling on amp off for open hi limit control Shorted or open supplementary heater Do ohmmeter check 63 HEAT PUMP ROOM AIR CONDITIONERS TROUBLE SHOOTING TIPS Possible Cause O 002 Refer to applicable wiring diagram Defective solenoid coil Check for continuit
23. fails because of a defect in workmanship or material within sixty months from date of purchase FRIEDRICH will pay a labor allowance and parts necessary to repair the Sealed Refrigeration System PROVIDED FRIEDRICH will not pay the cost of diagnosis of the problem removal freight charges and transportation of the air conditioner to and from the Service Agency and the reinstallation charges associated with repair of the Sealed Refrigeration System All such cost will be the sole responsibility of the owner This remedy is expressly agreed to be the exclusive remedy within sixty months from the date of the original purchase APPLICABILITY AND LIMITATIONS This warranty is applicable only to units retained within the Fifty States of the U S A District of Columbia and Canada This warranty is not applicable to 1 Air filters or fuses 2 Products on which the model and serial numbers have been removed 3 Products which have defects or damage which results from improper installation 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 corrosive atmosphere default or delay in performance caused by war government restrictions or restraints strikes material shortages beyond the control of FRIEDRICH or acts of God OBTAINING WARRANTY PERFORMANCE Service will be provided by the FRIEDRICH Authorized Dealer or Serv
24. for future reference if necessary NOTE This is a warm weather appliance The air conditioner is designed to cool in warm weather when the outside temperature is above 60 F 15 6 C and below 115 F 46 1 C so it won t cool a room if it is already cool outside If you want to cool a room in the spring or fall select the FAN ONLY mode and set the Fresh Air Exhaust air control to Fresh Air This will bring in a supply of cooler outside air Condensation is normal Air conditioners actually pump the heat and humidity from your room to the outside Humidity becomes water and your air conditioner will use most of the water to keep the outside coil cool If there is excessive humidity there may be excess water that will drip outside This is normal operation Frosting This usually occurs because of insufficient airflow across the coils a dirty filter cool damp weather or all of these Set the SYSTEM mode to FAN ONLY the frost will disappear Setting the thermostat a little warmer will probably prevent the frosting from recurring Noises All air conditioners make some noise Friedrich units are designed to operate as quietly as possible An air conditioner mounted in 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 unit is a Y or heat pump model there are some t
25. nameplate If Compressor not pumping properly not conclusive make pressure test 59 60 COOLING ONLY ROOM AIR CONDITIONERS TROUBLESHOOTING TIPS Possible Cause Possible Solution Replace fuse reset breaker If repeats check Fuse blown or circuit tripped fuse or breaker size Check for shorts in unit wiring amp components Power cord not plugged in Plug it in System button in OFF position Set correctly Inoperative system button or open Test for continuity Check alarms Correct electronic control board as needed Loose or disconnected wiring Check wiring amp connections Reconnect per control board or other components wiring diagram Possible Cause Possible Solution Dirty filter Clean as recommended in Owner s Manual Check for dirty or obstructed coil Use Restricted airflow pressure wash or biodegradable cleaning agent to clean Evaporator coil Inoperative thermistor Check alarms Replace as necessary freezes up Short of refrigerant De ice coil amp check for leak Inoperative fan motor Test fan motor amp replace if inoperative Partially restricted capillary tube De ice coil Replace capillary tube Possible Cause Possible Solution Unit undersized Test cooling performance amp Excessive heat load i replace with larger unit if needed See sizing chart NP Check for partially iced coil amp check Restriction in line Compressor runs temperature split across coil continually
26. requirements Must be single stage heat cool For cooling only units C R G Y For cooling with electric heat units C R G Y W For heat pump units C R G Y W B See page 68 for RT5 T Stat wiring diagrams During Heat Mode The B terminal must be continuously energized The W terminal from the T Stat must have 24 V AC output to call for heat The control board decides on whether to turn on the Heat Pump Heat compressor or Electric Resistance Heat The Y terminal should not have 24 VAC output during Heat Mode 29 30 REMOVING THE FRONT COVER WARNING ELECTRIC SHOCK HAZARD Disconnect power to the unit before servicing Failure to follow this warning could result in serious injury or death Remove the decorative front cover by using the tool provided see figure below HAND TOOLE e DO OVER TIGHTER LOCATION OF GRILLE REMOVAL TOOL 4 Tighten the four 4 captive screws as indicated by the arrows in the figure above before closing the front panel do not over tighten Ensure the filter is in place Make sure curtains do not block the side air intake Notes on reattaching the decorative front cover Align the cord notch over the cord and center the fresh air lever Align the cover over the User Interface Ul to ensure it is clear around it and it does not depress any buttons If not installed correctly the wrench alert symbol could flash REMOVING THE CHASSIS A WARNING EL
27. system 5 Evacuate system to 200 microns or less 6 Weigh in refrigerant with the property quantity of R 410A refrigerant 7 Start unit and verify performance WARNING BURN HAZARD Proper safety procedures must be followed and proper protective clothing must be worn when working with a torch ae Failure to follow these procedures could result in moderate or serious injury 8 Crimp the process tube and solder the end shut 39 40 WARNING ELECTRIC SHOCK HAZARD Turn off electric power before service or installation Extreme care must be used if it becomes necessary to work on equipment with power applied Failure to do so could result in serious injury or death Undercharged Refrigerant Systems An undercharged system will result in poor performance low pressures etc in both the heating and cooling cycle Whenever you service a unit with an undercharge of refrigerant always suspect a leak The leak must be repaired before charging the unit To check for an undercharged system turn the unit on allow the compressor to run long enough to establish working pressures in the system 15 to 20 minutes During the cooling cycle you can listen carefully at the exit of the metering device into the evaporator an intermittent hissing and gurgling sound indicates a low refrigerant charge Intermittent frosting and thawing of the evaporator is another indication of a low charge how
28. to the common connections S to The lowest resistance is from the run to common C to R Before replacing a compressor check to be sure it is defective GROUND TEST Use an ohmmeter set on its highest scale Touch one lead to the compressor body clean point of contact as a good connection is a must and the other probe in turn to each compressor terminal If a reading is obtained the compressor is grounded and must be replaced Check the complete electrical system to the compressor and compressor internal electrical system check to be certain that compressor is not out on internal overload Complete evaluation of the system must be made whenever you suspect the compressor is defective If the compressor has been operating for sometime a careful examination must be made to determine why the compressor failed NOTE OHM Figures are for examples only not actual values for the compressor 3 65 OHMS RESISTANCE RESISTANCE EQUALS RESISTANCE Many compressor failures are caused by the following conditions 1 Improper air flow over the evaporator 2 Overcharged refrigerant system causing liquid to be returned to the compressor 3 Restricted refrigerant system 4 Lack of lubrication 5 Liquid refrigerant returning to compressor causing oil to be washed out of bearings 6 Noncondensables such as air and moisture in the system Moisture is extremely destructive to a refrigerant system
29. unplugged Press and release RESET listen for click Reset button latches and remains in to resume operation Unit does not operate The LCDI power cord has tripped Reset button has popped out Reset the circuit breaker or replace the fuse as applicable If the problem continues contact a licensed electrician There has been a local power The unit will resume normal operation once failure power has been restored Other appliances are being used on The unit requires a dedicated outlet circuit not the same circuit shared with other appliances Do NOT use an extension cord with this or any An extension cord is being used e 5 Ue other air conditioner Unit Trips Circuit Breaker or Blows Fuses Replace with a circuit breaker or time delay The circuit breaker or time delay fuse of the proper rating See Electrical fuse is not of the proper rating Rating Tables on pg 6 for the proper circuit breaker fuse rating for your unit If the problem continues contact a licensed electrician The circuit breaker has tripped or the supply circuit fuse has blown The LCDI 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 LCDI Power Cord Trips Reset Button Pops Out Once the problem has been determined and corrected press and release RESET listen for click Re
30. 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 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 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 curtem Key curtem Hey Pressed IF Preszed IF Com ma id rom maid COOL Storage FAM Only Storage System CoL System Fan Only Made Fan AUTO Fan Continuous Modes Continuous Modes Speed Speed 1 2 3 4 Triangle 1 2 3 4 Triangle Set Point ta 99 F Set Point 161037 Schedule Schedule TH OFF Figure 2 System Mode Heat Cool Units m COOL HEAT Stem Satem Satem kew Pressed or IR Pressed or IR
31. word NOTICE Potential property damage can occur if instructions are not followed PERSONAL INJURY OR DEATH HAZARDS ELECTRICAL HAZARDS Unplug and or disconnect all electrical power to the unit before performing inspections maintenance or service Make sure to follow proper lockout tag out procedures e Always work in the company of a qualified assistant if possible Capacitors even when disconnected from the electrical power source retain an electrical charge potential capable of causing electric shock or electrocution e 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 or pour water on the return air grille discharge air grille evaporator coil control panel and sleeve on the room side of the air conditioning unit while cleaning Electrical component malfunction caused by water could result in electric shock or other electrically unsafe conditions when the power is restored and the unit is turned on even after the exterior is dry Never operate the A C unit with wet hands Use air conditioner on a single dedicated circuit within the specified amperage rating Use on a properly grounded outlet only Do not remove ground prong of plug Do not cut or modify the power supply
32. 0 32 385 3 80 37 30 281 31 418 3 75 38 29 425 30 534 3 77 39 28 532 29 579 40 27 701 28 704 45 23 931 24 745 3 40 50 20 731 21 391 3 18 55 18 008 18 542 2 96 15 684 16 115 2 75 14 043 2 53 13 666 2 48 13 30 12 947 12 603 2 35 12 269 2 31 11 946 2 26 11 633 2 22 11 329 2 18 65 13 697 13 335 67 12 984 12 644 12 313 70 11 993 71 11 682 72 11 380 73 11 088 74 10 804 11 034 2 13 75 10 528 10 748 2 09 80 900 925 949 210 210 8 809 2 17 8 591 2 20 8 379 2 23 8 172 2 27 7 972 2 30 7 778 7 589 7 405 2 40 7 226 2 43 7 052 2 47 883 2 50 6 718 2 53 6 558 2 57 403 2 60 6 252 2 63 6 105 2 67 5 961 2 70 82 83 84 85 87 88 91 92 93 94 95 97 5 822 100 5 686 2 7 105 5 060 2 93 116 4 5n 3 10 115 4 090 137 120 3 606 3 43 4 FRIEDRICH K hl Remote Control Replacement Remote Control Configuration Instructions For Use with K hl cool only models and Kuhl cool amp heat models Contents e Remote Control with Holder e 2 AAA batteries e Instruction Sheet ATTENTION You May Need to Configure The Replacement Remote Control Please read instructions completely before attempting configuration of the Remote Control Failure to do so could result in the Remote Control not being able to operate the Air Conditioning Unit properly Step 1 A Locate the Model of your Air Conditioner B Identify the prefix First 2 Letters
33. 45 F or greater 25 26 Heat Pump With Electric Heat Operation Continued Condition 2 If the A 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 satisfied Note that the electric heat switches on after the A temp passes 5 F and the heat pump switches off Also note that the electric heat will run until the heat demand is satisfied When another heat demand cycle is initiated the heat pump will run unless the A temp is greater than the electric heat threshold Emergency Heat If a compressor fails 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 first 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 pr
34. 7 Capacitor see page 34 CHECKING COMPRESSOR EFFICIENCY The reason for compressor inefficiency is normally due to broken or damaged suction and or discharge valves reducing the ability of the compressor to pump refrigerant gas WARNING HIGH PRESSURE HAZARD Sealed Refrigeration System contains refrigerant and oil under high pressure Proper safety procedures must be followed and proper protective clothing must be worn when working with refrigerants Failure to follow these procedures could result in serious injury or death This condition can be checked as follows 1 Install a piercing valve on the suction and discharge or liquid process tube 2 Attach gauges to the high and low sides of the system 3 Start the system and run a cooling or heating perfor mance test If test shows A Below normal high side pressure B Above normal low side pressure C Low temperature difference across coil The compressor valves are faulty replace the compressor 47 COMPRESSOR REPLACEMENT Recommended procedure for compressor replacement WARNING RISK OF ELECTRIC SHOCK Unplug and or disconnect all electrical power to the unit before performing inspections maintenances or service Failure to do so could result in electric shock serious injury or death 1 Be certain to perform all necessary electrical and refrigeration tests to be sure the compressor is actually defective before replacing
35. 7 9 7 1 Kuhl 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 ES15M33 14500 14300 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 EM18M34 17500 17200 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 EM24M34 23500 23300 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 EL36M35 36000 35700 17300 14300 230 208 19 0 20 5 4235 4200 24 0 22 4 5500 4650 25 8 5 8 5 338 12 0 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 specifications are subject to change without notice As an ENERGY STAR partner Friedrich Air Conditioning Co has determined that the selected ENERGY STAR models meet the ENERGY STAR guidelines for energy efficiency All models use environmentally The consumer through the AHAM Room Air Conditioner Certification Program can be certain that the AHAM Certification Seal accurately states friendly R 410A the unit s cooling and heating capacity rating the amperes and the energy efficiency ratio Estimated yearly operating cost based a 2007 national average electricity cost of 10 65 cents per kWh T The estimated yearly
36. 95 degree F outside air temp amp 40 relative humidity all systems use R 410A S P E C FI CAT S ENERGY STAR qualified Energy Estimated Room Side Efficiency Yearly Moisture Air Net Cooling Heating Volts Cooling Heating Heating Ratio Operating Removal Circulation Weight Model Capacity Btu Capacity Btu Rated Amps Watts Amps Watts COP EER Cost Pints HR CFM Sleeve Lbs K hl SS08M10 7900 115 6 1 677 54 1 0 SS10M10 9500 115 7 7 848 TAE 68 2 0 SS12M10 12000 115 10 0 1071 ike 86 3 0 SS14M10 14000 115 12 0 1444 S 115 3 5 5512 30 11700 11200 230 208 4 8 4 9 1026 982 11 4 11 4 82 2 8 5515 30 14500 14300 230 208 6 4 6 8 1405 1385 10 3 10 3 112 3 5 SM18M30 17500 17200 230 208 7 4 8 0 1635 1617 10 7 10 7 131 4 6 SM21M30 20800 20700 230 208 9 4 10 3 2080 2070 10 0 10 0 166 6 0 SM24M30 23500 23300 230 208 11 2 11 9 2500 2479 9 4 9 4 200 10 0 SL28M30 27800 27000 230 208 13 5 14 4 2865 2812 9 7 9 6 229 8 5 SL36M30 36000 35700 230 208 19 0 20 5 4235 4200 8 5 8 5 338 12 0 ririzizizioiolioljoj jo o K hl Heat Pump YS10M10 9500 7500 115 7 8 812 7 6 743 3 0 65 YS12M33 12100 12100 9400 9000 230 208 5 254 1120 1120 5 6 5 8 1132 1139 2 4 10 8 10 8 89 YM18M34 18200 17800 15500 15400 230 208 8 5 8 9 1838 1798 8 5 8 7 1833 1761 26 9 9 9 9 147 YL24M35 24000 23600 23500 23200 230 208 11 1 12 0 2474 2433 12 2 14 3 2610 2575 26 9
37. After the unit has run 10 to 15 minutes check the gauge pressures Gauges connected to system with an undercharge will have low head pressures and substantially low suction pressures Valve Accumulator Suction E m Head Pressure Indoor Coil Much Lower jene Compressor Running Quieter than Normal Amps Lower Undercharged System of the 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 pressure should be slightly higher Accumulator Suction Pressure Noticeably High Compressor Slugged with Refrigerant Overcharged System Restricted Refrigerant System Troubleshooting a restricted refrigerant system can be difficult The following procedures are the more common problems and solutions to these problems There are two types of refrigerant restrictions Partial restrictions and complete restrictions A partial restriction allows some of the refrigerant to circulate through the system With a complete restriction there is no circulation of refrigerant in the system Restricted refrigerant systems display the same symptoms as a low charge condition When the unit is shut off the gauges may equalize very slowly Gauges connected to a completely restricted system will run in a deep vacuum When the unit is shut off the gauges will not equaliz
38. BACK key to accept the change FAM and exit the sub menu to the M3 screen sean 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 19 M4 Switch Access Unit Configuration FACTORY USE ONLY SYSTEM FAN MODE 5 SCHEDULE M5 Error Codes amp History Number of Errors em n Error Code 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 or w keys to cycle through the error codes 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 or keys to cycle through the error codes The current state of the error code is shown
39. BLE SHOOTING TIPS REFRIGERANT SYSTEM DIAGNOSIS HEATING CYCLE LOW SUCTION PRESSURE HIGH SUCTION PRESSURE LOW HEAD PRESSURE HIGH HEAD PRESSURE Low Airflow Outdoor Ambient Too High Refrigerant System Outdoor Ambient Too High Across Outdoor Coil for Operation in Heating Restriction For Operation In Heating Refrigerant System Reversing Valve not Reversing Valve not Low Airflow Across Restriction Fully Seated Fully Seated Indoor Coil Undercharged Overcharged Undercharged Overcharged Noncondensables air Moisture in System Defective Compressor Defective Compressor in System air ELECTRICAL TROUBLESHOOTING CHART HEAT PUMP HEAT PUMP SYSTEM COOLS WHEN HEATING IS DESIRED Is the Selector Switch Is Line Voltage Set for Heat Present at the Solenoid YES Is the Solenoid Coil Good Replace the Solenoid Coil YES Reversing Valve Stuck Replace the Reversing Valve 65 TROUBLESHOOTING TOUCH TEST CHART TO SERVICE REVERSING VALVES NORMAL FUNCTION OF VALVE NOTES VALVE OPERATING CONDITION LEFT Pilot Capillary Tube COIL TEMPERATURE OF VALVE BODY WARMER THAN VALVE BODY to Compressor Tube to INSIDE RIGHT Pilot Capillary Tube 25 cg lt lt o SUCTION TUBE Tube to OUTSIDE MALFUNCTION OF VALVE No voltage to coil Repair electrical circuit Check Electrical circuit and coil Defective coil Replace coil Check refrigeration c
40. ECTRIC SHOCK HAZARD Disconnect power to the unit before servicing Failure to follow this warning could result in serious injury or death Remove the decorative front cover See figure at left Remove the chassis Entrygard Retainer Wire by removing the screw atthe front right bottom corner screw See Figure below Save this screw for reattachment after reinstalling the chassis ENTRY GARD RETAINER FAR RIGHT SCREW Handle Use Use handle on both sides to pull unit from sleeve Do not push pull or lift from center of support Hold the cabinet stationary then use the hand grips on both ends of the control unit support bracket to pull the chassis out of the cabinet see below CONTROL UNIT SUPPORT BRACKET Before reinserting the chassis into the sleeve ensure to properly reinstall the chassis seal gasket REPLACING THE INDOOR COIL THERMISTOR WARNING ELECTRIC SHOCK HAZARD Disconnect power to the unit before servicing Failure to follow this warning could result in serious injury or death Remove the decorative front cover see page 30 Remove all indicated screws below 8 total see figure below Remove the Discharge Sensor and the User Interface plugs from the control board FH ACAUTION AATTENTIC NN Uia kareha hat 1 1 De Usa Handle 4 a ure I ines
41. ELECTRONIC CONTROL CAPACITOR COMPRESSOR FAN MOTOR OVERLOAD PROTECTOR USER INTERFACE THERMAL FUSE HEATER LIMIT FUSE WIRING DIAGRAM UI HOLDER ELECTRONICS ASY OD AIR SENSOR OD COIL SENSOR ID COIL SENSOR DCHRG AIR SENSOR DISPLAY L2 or ACN AMBIENT AIR SENSOR BLACK WHITE SUPPLY CORD GREEN OR GREEN YELLOW TO CAPACITOR BRACKET L2 230 208 V COMPRESSOR 7 HERM f COM 7 THERMISTER COMBINATION TERMINAL GROUNDED LEAD SYMBOL INSULATOR HEATER ELEMENT PART NO REV 92170002 04 71 72 KUHL ELECTRONIC CONTROL COOL WITH ELECTRIC HEAT MODEL EL36M35A WIRING DIAGRAM COMPRESSOR UI HOLDER ELECTRONICS ASY OUTDOOR AIR SENSOR OUTDOOR COIL SENSOR INDOOR COIL SENSOR SOLID STATE RELAY HEATER DSCHRG AIR TO SENSOR L2 or ACN AMBIENT AIR SENSOR SUPPLY CORD OR GREEN YELLOW TO CAPACITOR BRACKET TO INNERWALL MOTOR MOUNT S CHEMATIC NEUTRAL 115 V USER INTERFACE L2 230 208 V F3 MEDIUM SS F2 FAN MTR 1 e FAN 7 gt ELECTRIC HEAT CAP s O HL ELECTRIC HEAT L2 we COMPRESSOR COMPRESSOR KAXAN KAX X NK K AX KAA 72 e HERM COM 2 CAPACITOR D THER MISTER COMPR COMPRESSOR MTR BERS e COMBINATION TERMINAL OLP OVERLOAD PROTECTOR
42. GROUNDED LEAD SYMBOL UI USER INTERFACE INSULATOR TF THERMAL FUSE HTR HEATER ELEMENT HL HEATER LIMIT FUSE PART NO REV 92170007 00 KUHL ELECTRONIC CONTROL HEAT PUMP ONLY MODEL YS10M10A WIRING DIAGRAM COMPRESSOR UI HOLDER ELECTRONICS ASY COIL SOLENOID OD AIR SENSOR OD COIL SENSO ID COIL SENSOR DCHRG AIR TO SENSOR DISPLAY L2 or ACN SUPPLY CORD CAPACITOR OR GREEN YELLOW TO CAPACITOR BRACKET TO INNERWALL MOTOR MOUNT SCHEMATIC 9 NEUTRAL 115 V USER INTERFACE L2 230 208 V SH MEDIUM Low sl 7 FAN MTR 0 2 2 5 FAN COM CAP REVERSE CYCLE PE OLP SS Q COMPRESSOR COMPRESSOR 2 f HERM COM ELECTRONIC CONTROL e r c AP U gt LEGEND CAP CAPACITOR 7009 REVERSING VALVE COMPR COMPRESSOR _THERMISTER MTR FAN MOTOR OLP OVERLOAD PROTECTOR e COMBINATION TERMINAL UI USER INTERFACE GROUNDED LEAD SYMBOL TF THERMAL FUSE O INSULATOR PART NO REV 92170003 04 HL HEATER LIMIT FUSE HTR HEATER ELEMENT KUHL ELECTRONIC CONTROL HEAT PUMP WITH ELECTRIC HEAT MODELS YS12M33A YM18M34A WIRING DIAGRAM COMPRESSOR UI HOLDER ELECTRONICS ASY COIL SOLENOID OD AIR SENSOR OD COIL SENSOR ID COIL SENSOR HEATER L2 or ACN AMBIENT AIR SENSOR PEPER L1 BLACK o T SUPPLY CORD WHITE CAPACITOR OR GREEN YELLOW
43. HEN FRONT PANEL IS REMOVED Figure 2 qua BACKUP BATTERY Battery type Lithium 3 Volts CR2450 53 54 Service antl Assistance Before calling for service please check the Troubleshooting Tips section on pages 40 and 41 This may help you to find the answer to your problem avoid unnecessary service calls and save you the cost of a service call if the problem is not due to the product itself If you have checked the Basic Troubleshooting section and still need help it is available as follows You can find the name of your local Authorized Service Provider by visiting our web site at www friedrich com If you require further assistance You can call the Customer Support Call Center at 1 800 541 6645 Before calling please make sure that you have the complete model and serial number and date of purchase of your equipment available By providing us with this information we will be better able to assist you Our specialists are able to assist you with Specifications and Features of our equipment Referrals to dealers and distributors Use and Care Information Recommended maintenance procedures Installation information Referrals to Authorized Service Providers and Parts depots Available Accessories DC 2 Drain Kit Part No 01900235 In some installat
44. INE MAINTENANCE Continued After Maintenance Repair Start up Checklist and Notes Inspect and ensure that all components and accessories have been installed properly and that they have not been damaged during the installation progress Check the condensate water drain s to ensure that they are adequate for the removal of condensate water and that they meet the approval of the end user Ensure that all installation instructions concerning clearances around the unit have been adhered to Check to ensure that the unit air filter indoor coil and outdoor coil are free from any obstructions Ensure that the circuit breaker s fuse s and supply circuit wire size have been sized correctly If the unit was supplied with a power supply cord insure that it is stored properly Ensure that the entire installation is in compliance with all applicable national and local codes and ordinances having jurisdiction Secure components and accessories such as a decorative front cover Start the unit and check for proper operation of all components each mode of operation Instruct the owner or operator of the units operation and the manufacturer s Routine Maintenance NOTE A log for recording the dates of maintenance and or service is recommended Present the owner or operator of the equipment with the name address and telephone number of the Authorized Friedrich Warranty Service Company in the area
45. Multiply the total length linear feet of all walls exposed to the outside by the applicable factor Doors should be considered as being part of the wall Outside walls facing due north should be calculated separately from outside walls facing other directions Walls which are permanently shaded by adjacent structures should be considered North Exposure Do not consider trees and shrubbery as providing permanent shading An uninsulated frame wall or a masonry wall 8 inches or less in 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 between the space to be conditioned and any uncondi tioned spaces by the given factor Do not include inside walls which separate other air conditioned rooms 4 Multiply the total square feet of roof or ceiling area by the factor given for the type of construction most nearly describing the particular application use one line only 5 Multiply the total square feet of floor area by the factor given Disregard this item if the floor is directly on the ground or over a basement 6 Multiply the number of people who normally occupy the space to be air conditioned by the factor given Use a minimum of 2 people 7 Determine the total number of watts for light and electrical equipment except the air conditioner itself that will be in use when the ro
46. Preszed or IR Preszed or IR Comma id Com ma id Comma id Comma id AUTO Storage COOL Storage HEAT Storage FAN Only Storage System ALTO System COOL System Heat System Fan Only Fan AUTO Fan AUTO Fan AUTO Fan Continuous Modes Continuous Modez Continuous Modes Continuous Modes Fan AUTO Fan AUTO Fan AUTO Fan Speed Speed Speed Speed 1 2 3 4 Triangle 1 2 3 4 Triangle 1 2 3 4 Triangle 1 2 3 4 Triangle Set Point to 99 F Set Point to 99 F Set Point ta 99 F Set Point 16ta 37 16ta 37 C 15 to 37 C Schedule Schedule Schedule ON Schedule OFF OFF 21 22 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 Scheduler Front Panel Control Remote Minimum Auto Set Point 41 5 gt 4 3F Minimum Deadband 1 s wm m w m Cool Offset 1 5 F 1 5 F Heat Cool Demand Demand Threshold Threshold Sensors m Internal Thermostat c R Heat Y Cool gt Heat Cool Fan GL Control GH Fan System Set Point Mapping Figure Ther
47. R YS10M10A SERIAL NUMBER LICY00008 FRIEDRICH AIR CONDITIONING CO SAN ANTONIO TEXAS ASSEMBLED IN MEXICO Register the air conditioner Model information can be found on the name plate behind the front cover For your future convenience record the model information here MODEL NUMBER SERIAL NUMBER PURCHASE DATE UNIT IDENTIFICATION Model Number Code SS08M10 A eth Digit Engineering Major change 1st Digit Function S Straight Cool Value Series Y Heat Pump E Electric Heat 7th Digit Options 0 Straight Cool amp Heat Pump Models 3 3 KW Heat Strip Nominal 4 4 KW Heat Strip Nominal 2nd Digit 5 5 KW Heat Strip Nominal S Small Chassis M Medium Chassis L Large Chassis 6th Digit Voltage 1 115 Volts 3 230 208 Volts 3rd and 4th Digit Approximate BTU HR in 1000s Cooling Heating BTU Hr capacity listed in the Specification Performance Data Section 5th Digit Alphabetical Modifier RAC Serial Number Identification Guide Serial Number 00001 Decade Manufactured L 0 C 3 F 6 Production Run Number A 1 D 4 G 7 B 2 E 5 H 8 Year Manufactured Product Line A 1 D 4 G 7 R B 2 E 5 H 8 C 3 F 6 J 9 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 EVAP AIR TEMP DEG OPERATING R 410A BREAKER CONDENSER
48. Service Manual V4 FRIEDRICH IN 4 4 4 6 Standard Chassis R 410A Models Cool Only 115 Volt SSO8M10 5510 10 5512 10 SS14M10 K U h 208 230 Volt 5512 30 5515 30 5 18 30 5 21 30 SM24M30 5128 30 SL36M30 Cool with Electric Heat K u h 208 230 Volt ES12M33 ES15M33 EM18M34 EM24M35 EL36M35 Electric Heat Heat Pump with Electric Heat K u h 208 230 Volt YS12M33 YM18M34 YL24M35 Heat Pump Heat Pump 115 Volt YS10M10 Kuhl ServMan 5 10 Table Of Contents Important Satety uuu eE NERENS 2 4 u _ ___ ______ 5 Model and Serial Number Location 9 ACV i 6 Performance Data and Specifications a 7 Installation Information Sleeve Dimensions Circuit 8 reb 9 Before Operating Me UNIT u u uuu uuu 10 ConiolPanel uuu uuu ___ _____ _____ _____________ __ 11 PIO 12 14 Remote Control 15 16 Electronic Control System Maintenance Operation nnns 17 20 DIOS AON
49. 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 PW UP or KA 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 This button is used after a menu item has been selected 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 FRONT PANEL LOCK MAINTENANCE WAIT FILTER FILTER OFF ERESET HEAT gt SET POINT lt COOL INA NA NA NA C DISPLAY ENTER BUTTONS 11 12 ALERTS the control system has five 5 customer alerts CHECK FILTER When the filter needs to be checked an icon appears on screen The word
50. This damage usually can be avoided by proper connection of the running capacitor terminals From the supply line on a typical 230 volt circuit a 115 volt potential exists from the R terminal to ground through a possible short in the capacitor However from the S or start terminal a much higher potential possibly as high as 400 volts exists because of the counter EMF generated in the start winding 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 line or R terminal never to the S terminal When connected properly a shorted or grounded running capacitor will result in a direct short to ground from the terminal and will blow the line fuse The motor protector will protect the main winding from excessive temperature Dual Rated Run Capacitor Hook up EN FAN MOTOR COM 4 9 C e RED DOT RUN CAPACITOR COMPONENTS TESTING HEATING ELEMENT All heat pumps and electric heat models are equipped with a heating element with the exception of model YS10M10 The other YS and ES models are equipped with a 3 3 KW element The and models are equipped with a 4 0 KW element The YL and EL models are equipped with a 5 2 KW element Heating Element The heating element contains a fuse link and a heat
51. Wire Length for Desk Control Switch Wire Size Maximum Length Auxiliary Fan Control The electronic control also has the ability to control a 24 VAC relay to activate an auxiliary or transfer fan The 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 will send a 24 VAC signal to the relay The relay must be 24 VAC 50mA or less Note The Desk Control Auxiliary Fan relay and wires must be field supplied Airflow Selection and Adjustment Air flow direction adjustment The airflow path may be adjusted to distribute air independently from the left or right side of the discharge opening Each of the banks of louvers can be directed left right up or down in order to achieve the most optimum airflow positioning To adjust airflow direction grab the lever in the center of the louver bank and move it in the direction that you would like the air to be directed Please note that it is normal that airflow may be stronger out of one side of the louvers than the other Fresh air and exhaust control Your air conditioner has the ability to bring fresh air into the room or exhaust stale air out of the room The control slide is found on the upper part of the unit See Figure TO BRING IN FRESH AIR Move the lever to the Fresh Air position which allows outside air to enter the r
52. ch 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 Auto Cool Heat Fan Maintenance Front Filter Mode Mode Mode Only Required Panel Maintenance Wait Mode Lock A 41 d CHECK ON EXIT AUTO C2 WU FILTER OFF RESET N CHUTDCOHUOR n A AUTO RH HEAT gt SET POINT COOL MODE CONTINUOUS FAN AUTO _ SPEED AWAY RETURN NIGHT DISPLAY 4 h 4 ENTER schedule schedule Periods Testing 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 17 18 Electronic Control System Maintenance Operation 5 To Enter the Maintenance Section Press SYSTEM SCHEDULE BACK DISPLAY ENTER for 6 seconds There are 5 maintenance sub menus M1 through M5 Maintenance Sub Menus Access 1 Temperature High Limit Service Only M2 Temperature Low Lim
53. components must be specifically designed for use with R 410A and dedicated to prevent contamination Manifold sets must be equipped with gauges capable of reading 750 psig high side and 200 psig low side with a 500 psig low side retard Gauge hoses must have a minimum 750 psig service pressure rating Recovery cylinders must have a minimum service pressure rating of 400 psig DOT 4BA400 and DOT BW400 approved cylinders POE Polyol Ester lubricants must be used with 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 high side of the system Introduce liquid refrigerant charge into the high side of the system For low side pressure charging of R 410A use a charging adaptor Use Friedrich approved R 410A filter dryers only 37 R 410A SEALED REFRIGERATION SYSTEM REPAIRS IMPORTANT SEALED SYSTEM REPAIRS TO COOL ONLY MODELS REQUIRE THE INSTALLATION OF ALIQUID LINE DRIER EQUIPMENT REQUIRED o WARNING HIGH PRESSURE HAZARD Sealed Refrigeration System contains refrigerant and oil under high pressure 25520 40 Voltmeter Ammeter Ohmmeter E P A Approved Refrigerant Recovery System Vacuum Pump capable of 200 microns or less vacuum Acetylene Welder Electronic Halogen Leak Detector capable of detecting HFC Hydrofluorocarbon refrigerants
54. cord Do not use extension cords with the unit Follow all safety precautions and use proper and adequate protective safety aids such as gloves goggles clothing adequately insulated tools and testing equipment etc Failure to follow proper safety procedures and or these warnings can result in serious injury or death REFRIGERATION SYSTEM REPAIR HAZARDS Use approved standard refrigerant recovering procedures and equipment to relieve pressure before opening system for repair Do not allow liquid refrigerant to contact skin Direct contact with liquid refrigerant can result in minor to moderate injury Be extremely careful when using an oxy acetylene torch Direct contact with the torch s flame or hot surfaces can cause serious burns Make sure to protect personal and surrounding property with fire proof materials Have a fire extinguisher at hand while using a torch Provide adequate ventilation to vent off toxic fumes and work with a qualified assistant whenever possible Always use a pressure regulator when using dry nitrogen to test the sealed refrigeration system for leaks flushing etc Make sure to follow all safety precautions and to use proper protective safety aids such as gloves safety glasses clothing etc Failure to follow proper safety procedures and or these warnings can result in serious injury or death MECHANICAL HAZARDS Extreme care proper judgment and all safety procedures must be followed when te
55. crease Keys change the OPT Code displayed on the Remote Control to match the OPT Code shown on the Air Conditioning Unit s display see examples below Air Conditioning Unit Display Remote Control Display Step 5 save the setting in the Remote Control press and hold the Remote Control and 9939 Key simultaneously for approximately 6 seconds until the displayed configuration number on the Remote Control flashes The Remote Control is now configured to work with the air conditioner 78 3 FRIEDRICH Kuhl User Interface Service Kit Replacement Instructions For Use with K hl cool only models and K hl cool and heat models ATTENTION Please read these instructions completely before attempting replacement Always unplug the power supply from the power supply receptacle Contents e User Interface UI e Ribbon Cable 2 Mounting screws for UI e Instruction Sheet Step 1 Disconnect ribbon cable by pulling straight out Step 2 Remove 2 mounting screws securing UI and disconnect ribbon cable Step 3 Remove UI and ribbon cable from handle assembly Step 4 Install new UI using the 2 screws route new ribbon cable and reattach ribbon cable to UI and Main control board Step 5 Verify control operation Hibbon cable connection Mounting screws 79 80 INSTRUCTIONS FOR USING COOLING LOAD ESTIMATE FORM FOR ROOM AIR CONDITIONERS AHAM PUB NO RAC 1 This cooling load estimate form is suitable
56. d be registered DRAIN PAN VALVE During the cooling mode of operation condensate which collects in the drain pan is picked up by the con denser fan blade and sprayed onto the condenser coil This assists in cooling the refrigerant plus evaporating the water During the heating mode of operation it is necessary that water be removed to prevent it from freezing during cold outside temperatures This could cause the con denser fan blade to freeze in the accumulated water and prevent it from turning To provide a means of draining this water a bellows type drain valve is installed over a drain opening in the base pan This valve is temperature sensitive and will open when the outside temperature reaches 40 F The valve will close gradually as the temperature rises above 40 F to fully close at 60 F Bellows Assembly Drain Pan Valve 35 36 REFRIGERATION SEQUENCE OF OPERATION A good understanding of the basic operation of the refrigeration system is essential for the service technician Without this understanding accurate troubleshooting of refrigeration system problems will be more difficult and time consuming if not in some cases entirely impossible The refrigeration system uses four basic principles laws in its operation they are as follows 1 Heat always flows from a warmer body to a cooler body 2 Heat must be added to or removed from a substance before a change in state can occur 3 F
57. e are 8 stored amp variable set points in the system 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 Reversing Valve Control Active Mode Compressor Reversing Valve State 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 figure below Compressor Operation d Ll L 0 Pump On Cool On LL Valve State 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 Reversing Valve Operation Cooling Mode Once the ambient temperature rises past the cool demand threshold Cool Set Point 1 5 F see figure 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 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 figure below for graphic details A Temp Above Set Point 2 3
58. e at all A quick check for either condition begins at the evaporator With 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 the entrance of the metering device Frost may continue on the suction line back to the compressor Often a partial restriction of any type can be found by feel as there is a temperature difference from one side of the restriction to the other With a complete restriction there will be no sound at the metering device entrance An amperage check of the compressor with a partial restriction may show normal current when compared to the unit specifi cation With a complete restriction the current drawn may be considerably less than normal as the compressor is running in a deep vacuum no load Much of the area of the condenser will be relatively cool since most or all of the liquid refrigerant will be stored there The following conditions are based primarily on a system in the cooling mode Accumulator Suction Pressure Deep Vacuum Compressor Reversing Valve Head Pressure Lower Outdoor Call Gauges will not equalize with unit shut off Completely Restricted System Accumulator Indoor Coil Suction Pressure E Lower Outdoor Coil Gauges may equalize very slowly Partially Restricted System 41
59. e of operation liquid refrigerant from the indoor coil enters the heating check valve forcing the cooling check valve shut The liquid refrigerant is directed into the liquid dryer after which the refrigerant is metered through the heating capillary tubes to outdoor coils Note liquid refrigerant will also be directed through the cooling capillary tubes in a continuous loop during the heating mode 42 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 flow to the indoor and outdoor coils It consists of a pressure operated main valve and a pilot valve actuated by a solenoid plunger The solenoid is energized during the heating cycle only The reversing valves used in the RAC system is a 2 position 4 way valve The single tube on one side of the main valve body is the high pressure inlet to the valve from the compressor The center tube on the opposite side is connected to the low 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 PILOT SOLENOID VALVE A and B ports ofthe pilot valve Athird capillary isa common return line from these ports to the suction tube on the main valve body Four way reversing va
60. ective clothing must be worn when working with liquid refrigerant Failure to follow these procedures could result in minor to moderate injury 10 Recharge the system with the correct amount of refrigerant The proper refrigerant charge will be found on the unit rating plate The use of an accurate measuring device such as a charging cylinder electronic scales or similar device is necessary 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 Proper safety procedures must be followed and proper protective clothing must be worn when working with refrigerants Failure to follow these procedures could result in serious injury or death WARNING EXPLOSION HAZARD The use of nitrogen requires a pressure regulator Follow all safety procedures and wear protective safety clothing etc Failure to follow proper safety procedures result in serious injury or death 1 Recover all refrigerant and oil from the system 2 Remove compressor capillary tube and filter drier from the system 3 Flush evaporator condenser and all connecting tubing with dry nitrogen or equivalent Use approved flushing agent to remove all contamination from system Ins
61. ed 5 Apply live test cord probes on each of the remaining wires from the speed switch or system switch to test intermediate speeds If the control is in the MoneySaver mode and the thermostat calls for cooling the fan will start then stop after approximately 2 minutes then the fan and compressor will start together approximately 2 minutes later Blower Fan Motor 34 CAPACITORS 4 amp WARNING ELECTRIC SHOCK HAZARD Turn off electric power before servicing Discharge capacitor with a 20 000 Ohm 2 Watt resistor before handling Failure to do so may result in personal injury or death Many motor capacitors are internally fused Shorting the terminals will blow the fuse ruining the capacitor A 20 000 ohm 2 watt resistor can be used to discharge capacitors safely Remove wires from capacitor and place resistor across terminals When checking a dual capacitor with a capacitor analyzer or ohmmeter both sides must be tested Capacitor Check with Capacitor Analyzer The capacitor analyzer will show whether the capacitor is open or shorted It will tell whether the capacitor is within its micro farads rating and it will show whether the capacitor is operating at the proper power factor percentage The instrument will automatically discharge the capacitor when the test switch is released Capacitor Connections The starting winding of a motor can be damaged by a shorted and grounded running capacitor
62. ed changed to a gas it is heated even further by the air that continues to flow across the evaporator coil The particular system design determines at exactly what point in the evaporator the change of state i e liquid to a gas takes place In all cases however the refrigerant must be totally evaporated changed to a gas before leaving the evaporator coil The low pressure suction created by the compressor causes the refrigerant to leave the evaporator through the suction line as a cool low pressure vapor The refrigerant then returns to the compressor where the cycle is repeated Disch IX ischarge Line Evaporator a r Liquid Line m M R 410A SEALED SYSTEM REPAIR CONSIDERATIONS WARNING Refrigeration system under high pressure Do not puncture heat expose to flame or incinerate Only certified refrigeration technicians should service this equipment R410A systems operate at higher pressures than R22 equipment Appropriate safe service and handling practicces must be used Only use gauge sets designed for use with R410A Do not use standard R22 gauge sets The following is a list of important considerations when working with R 410A equipment R 410A pressure is approximately 60 higher than R 22 pressure R 410A cylinders must not be allowed to exceed 125 F they may leak or rupture R 410A must never be pressurized with a mixture of air it may become flammable Servicing equipment and
63. er limit switch The fuse link is in series with the power supply and will open and interrupt the power when the temperature reaches 199 F or a short circuit occurs in the heating element Once the fuse link separates a new fuse link must be installed NOTE Always replacement The heater element has a high limit control This control is a bimetal thermostat mounted in the top of the heating element replace with the exact Should the fan motor fail or filter become clogged the high limit control will open and interrupt power to the heater before reaching an unsafe temperature condition The control is designed to open at 110 F 6 F Test continuity below 110 F and for open above 110 F HEATING ELEMENT Heat Pump Models The heating element for the Y model is energized by an outdoor thermistor via the electronic control board The outdoor defrost thermistor is adjusted at a predetermined temperature to bring on the heating element and turn off the compressor The room TESTING THE HEATING ELEMENT WARNING ELECTRIC SHOCK HAZARD Disconnect power to the unit before servicing Failure to follow this warning could result in serious injury or death Testing of the elements can be made with an ohmmeter across the terminals after the connecting wires have been removed A cold resistance reading of approximately 14 5 ohms for the 3 3 KW heater 11 9 ohms for the 4 0 KW heater and 9 15 ohms for the 5 2 KW heater shoul
64. ertain to have both suction and discharge process tubes open to atmosphere 4 Carefully pour a small amount of oil from the suction stub of the defective compressor into a clean container 5 Using an acid test kit one shot or conventional kit test the oil for acid content according to the instructions with the kit 6 If any evidence of a burnout is found no matter how slight the system will need to be cleaned up following proper procedures 7 Install the replacement compressor WARNING EXPLOSION HAZARD The use of nitrogen requires a pressure regulator Follow all safety procedures and wear protective safety clothing etc Failure to follow proper safety procedures result in serious injury or death 8 Pressurize with a combination of R 410A and nitrogen and leak test all connections with an electronic or Halide leak detector Recover refrigerant and repair any leaks found Repeat Step 8 to insure no more leaks are present 9 Evacuate the system with a good vacuum pump capable of a final vacuum of 200 microns or less The system should be evacuated through both liquid line and suction line gauge ports While the unit is being evacuated seal all openings on the defective compressor Compressor manufacturers will void warranties on units received not properly sealed Do not distort the manufacturers tube connections CAUTION FREEZE HAZARD Proper safety procedures must be followed and proper prot
65. ever frosting and thawing can also be caused by insufficient air over the evaporator Checks for an undercharged system can be made at the compressor If the compressor seems quieter than normal it is an indication of a low refrigerant charge Overcharged Refrigerant Systems Compressor amps will be near normal or higher Noncondensables can also cause these symptoms To confirm remove some of the charge if conditions improve system may be overcharged If conditions don t improve Noncondensables are indicated Whenever an overcharged system is indicated always make sure that the problem is not caused by air flow problems Improper air flow over the evaporator coil may indicate some of the same symptoms as an over charged system An overcharge can cause the compressor to fail since it would be slugged with liquid refrigerant The charge for any systemis critical When the compressor is noisy suspect an overcharge when you are sure that the air quantity over the evaporator coil is correct Icing WARNING HIGH PRESSURE HAZARD Sealed Refrigeration System contains refrigerant and oil under high pressure Proper safety procedures must be followed and proper protective clothing must be worn when working with refrigerants Failure to follow these procedures could result in serious injury or death A check of the amperage drawn by the compressor motor should show a lower reading Check the Unit opecification
66. flow 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 of the building that the airflow around the unit exterior is not blocked Unit placement If your air conditioner can be placed a window or wall that is shaded by a tree or another building the unit will operate even more efficiently Using drapes or blinds on the sunny side of the dwelling will also add to your unit s efficiency Insulation Good insulation will be a big help in maintaining desirable comfort levels Doors should have weather stripping Be sure to caulk around doors and windows Proper installation of seal gasket Make sure the seal gasket has been installed properly to minimize noise and improve efficiency If the seal gasket has not been installed please refer to the installation instructions ELECTRICAL DATA A 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 NOTICE FIRE HAZARD Not following the above WARNING could result in fire or electically unsafe conditions which could cause moderate or serio
67. for estimating the cooling load for comfort air conditioning installations which do not require specific 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 It can be used for areas in the continental United States having other outside design temperatures by applying a correction factor for the particular locality as determined from the map The form includes day factors for calculating cooling loads in rooms where daytime comfort is desired Such as living rooms offices etc The numbers of the following paragraphs refer to the corresponding numbered item on the form 1 Multiply the square feet of window area for each exposure by the applicable factor The window area is the area of the wall opening in which the window is installed For windows shaded by inside shades or venetian blinds use the factor for Inside Shades For windows shaded by outside awnings or by both outside aw nings and inside shades or venetian blinds use the factor for Outside Awnings Single Glass includes all types of single thickness windows and Double Glass includes sealed airspace types storm windows and glass block Only one number should be entered in the right hand column for Item 1 and this number should represent only the exposure with the largest load 2 Multiply the total square feet of all windows in the room by the applicable factor 3a
68. gerant charge is essential to proper unit operation Operating a unit with an improper refrigerant charge will result in reduced performance capacity and or efficiency Accordingly the use of proper charging methods during servicing will insure that the unit is functioning as designed and that its compressor will not be damaged Too much refrigerant overcharge in the system is just as bad if not worse than not enough refrigerant undercharge They both can be the source of certain compressor failures if they remain uncorrected for any period of time Quite often other problems such as low air flow across evaporator etc are misdiagnosed as refrigerant charge problems The refrigerant circuit diagnosis chart will assist you in properly diagnosing these systems An overcharged unit will at times return liquid refrigerant slugging back to the suction side of the compressor eventually causing a mechanical failure within the compressor This mechanical failure can manifest itself as valve failure bearing failure and or other mechanical failure The specific type of failure will be influenced by the amount of liquid being returned and the length of time the slugging continues Not enough refrigerant undercharge on the other hand will cause the temperature of the suction gas to increase to the point where it does not provide sufficient cooling for the compressor motor When this occurs the motor winding temperature will increase ca
69. h pressure refrigerant enters the check valve from the opposite direction closing the port liquid line to the outdoor coil The flow path of the refrigerant is then through the filter drier and heating capillary to the outdoor coil Failure of the slide in the check valve to seat properly in either mode of operation will cause flooding of the cooling coil This is due to the refrigerant bypassing the heating or cooling capillary tube and entering the liquid line COOLING MODE In the cooling mode of operation liquid refrigerant from condenser liquid line enters the cooling check valve forcing the heating check valve shut The liquid refrigerant is directed into the liquid dryer after which the refrigerant NOTE The slide check inside the valve is made of teflon Should it become necessary to replace the check valve place a wet cloth around the valve to prevent overheating during the brazing operation is metered through cooling capillary tubes to evaporator Note liquid refrigerant will also be directed through the heating capillary tubes in a continuous loop during the cooling mode CHECK VALVE OPERATION In the cooling mode of operation high pressure liquid enters the check valve forcing the slide to close the 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 HEATING MODE In the heating mod
70. harge Pressure differential too high Recheck system Valve will not Deenergize solenoid raise head pressure hift from cool reenergize solenoid to break dirt loose Pilot valve okay Dirt in bleeder hole valve wash to heat out Check on air before installing If no movement replace valve add strainer to discharge tube mount valve horizontally Stop unit After pressures equalize restart with solenoid energized If valve shifts reattempt with compressor running If still no shift replace valve Cool Hot Raise head pressure operate solenoid to Val ill t Raise head pressure operate solenoid Cool Hot Both ports of pilot open Back seat port ee shift from cool Cool x 2 Rh 1 Hot Hot ya does en partially clogged port If still no shift to heat 4 valve 2 2 Defective Compressor Replace compressor Not enough pressure differential at start Check unit for correct operating pressures Hot Warm Warm Hot TVB Hot of stroke or not enough fl ow to maintain and charge Raise head pressure If no pressure differential shift use valve with smaller port Starts to shift Hot Warm Warm Hot Eos Hor Beihponso platonem Raise head pressure operate solenoid If but does not no shift use valve with smaller ports Valve hung up at mid stroke Pumpin reversal 11 not suffi 2 Raise head pressure operate solenoid If shift
71. he optimal cooling solution 55 56 ERROR CODES AND ALARM STATUS Problem Control Board s Action Front Panel Button Stuck For More Continue to monitor for OPEN Unstuck switch Do not process switch Than 20 Seconds input ENSURE FRONT COVER DOES NOT DEPRESS BUTTONS Maintenance ICON Error Code Flash Input Voltage Out of Specification 103 127 1 487 253 Stop Open all relays until voltage is back within specs Resume operation Shorted operate Open or Shorted operate Sets temp to 20 F Override sensor Continue operation Use Elec Heat if available for HEATING If not available use HEAT PUMP if outdoor temp allows Flash Outdoor Coil Temperature Sensor is Open or Shorted Shut down for 5 min Resume operation for 3 min Continues to monitor If test fails 3 times the severity is increased and the unit operation is locked out Indoor Coil lt less than 30 F for 2 Turn compressor off Run High Fan speed When coil temp reachs 45 F consecutive minutes resume operation after lockout time Em Log Only Continue operation Continue to monitor Take action Log Log Only Continue operation Continue to monitor Take no action Log Only used if Electric Heat is available Run High Speed and Electric heat 10 Log Only Room Freeze Protection until room temp reaches 46 F Display FRZ during operation Logged Onl Sever
72. heet for explanation ELECTRICAL LINE VOLTAGE STATIC VOLTS START UP VOLTAGE VOLTS AMPERAGE DRAW l AMPS COOL AMPERAGE DRAW l AMPS HEAT COMPRESSOR LOCKED ROTOR AMPS AMPS AMPERAGE DRAW AMPS INDOOR TEMPERATURES INDOOR AMBIENT TEMPERATURE F RELATIVE HUMIDITY RH INDOOR COOL HEAT DISCHARGE AIR TEMPERATURE INDOOR E uds F RETURN AIR TEMPERATURE INDOOR p ee F OUTDOOR TEMPERATURE OUTDOOR AMBIENT TEMPERATURE F RH OUTDOOR l l ar DISCHARGE AIR TEMPERATURE OUTDOOR F F INTAKE AIR TEMPERATURE OUTDOOR p F APPLICATION USE ROOM RESIDENTIAL OR COMMERCIAL COOLING OR HEATING AREA W X Las SQ CU FT This is a general guide please consult manual J or M Sizing your air conditioner correctly Is vital Sizing Guide The following guide is based on normal room insulation average number of sun exposed windows and two person occupancy Btu h 000 350 400 9 000 550 700 14 000 700 1 000 18 000 1 400 450 10 000 450 550 12 000 1 000 1 200 21 000 1 200 1 400 23 000 1 600 1 90 28 000 1 200 2 700 36 000 1 400 1 600 25 000 T 900 This is general guide Please consult manual J or M for exact load calculations Due to variations in room design climate zone and occupancy larger areas may require the use of multiple units to provide t
73. her lead to the common C terminal of the com pressor Restore power to unit Determine L R V Start the compressor with the volt meter attached then stop the unit Attempt to restart the compressor within a couple of seconds and immediately read the voltage on the meter The compressor under these conditions will not start and will usually kick out on overload within a few seconds since the pressures in the system will not have had time to equalize Voltage should be at or above minimum voltage of 197 VAC as specified on the rating plate If less than minimum check for cause of inadequate power supply i e incorrect wire size loose electrical connections etc Amperage L R A Test The running amperage of the compressor is the most important of these readings A running amperage higher than that indicated in the performance data indicates that a problem exists mechanically or electrically Single Phase Running and L R A Test NOTE Consult the specification and performance section for running amperage The L R A can also be found on the rating plate Select the proper amperage scale and clamp the meter probe around the wire to the C terminal of the compressor Turn on the unit and read the running amperage on the meter If the compressor does not start the reading will indicate the locked rotor amperage L R A Overloads The compressor is equipped with either an external or internal overload which senses both m
74. hings that you will want to be aware of Some functions of a heat pump differ from your unit when it is used for heating 1 Iltis normal for ice to form on the outdoor coil of the heat pump Moisture in the outside air passing over the coil when very cold will form ice 2 outdoor temperature drops below 37 F 3 C your heat pump will automatically turn on the electric resistance heat When the temperature rises to 40 F 4 C the compressor will resume the heat pump operation If your unit is a 115 volt model YS10 it is designed for use in warmer climates and does not have an electrical heat feature and will not provide adequate heat below 37 F 2 8 C CONTROL PANEL BATTERY CHANGE PROCEDURE Remove the grille by loosening four 4 captive screws See Figure 1 Remove one 1 screw on the battery retaining door See Figure 2 Remove and replace the battery CR2450 Reinstall the battery retaining door Align the grille guide pins then tighten the four 4 captive screws Before closing the grille panel door check the filter Clean or replace it as necessary Figure 1 USE HAND TOOLS DO NOT OVER TIGHTEN USE HAND TOOLS WHEN INSTALLING AND REMOVING FRONT PANEL DO NOT OVERTIGHTEN SCREWS DISCONNECT POWER AND FOLLOW ALL LABELED WARNINGS W
75. ice Organization in your area They are listed in the Yellow Pages If assistance is required in obtaining warranty performance write to Room Air Conditioner Service Manager Friedrich Air Conditioning Co P O Box 1540 San Antonio TX 78295 1540 LIMITATIONS THIS WARRANTY IS GIVEN IN LIEU OF ALL OTHER WARRANTIES Anything in the warranty notwithstanding ANY IMPLIED WARRANTIES OF FITNESS FOR PARTICULAR PURPOSE AND OR MERCHANTABILITY SHALL BE LIMITED TO THE DURATION OF THIS EXPRESS WARRANTY MANUFACTURER EXPRESSLY DISCLAIMS AND EXCLUDES ANY LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGE FOR BREACH OF ANY EXPRESSED OR IMPLIED WARRANTY Performance of Friedrich s Warranty obligation is limited to one of the following methods 1 Repair of the unit 2 Arefund to the customer for the prorated value of the unit based upon the remaining warranty period of the unit 3 Providing a replacement unit of equal value The method of fulfillment of the warranty obligation is at the sole discretion of Friedrich Air Conditioning NOTE Some states do not allow limitations on how long an implied warranty lasts or do not allow the limitation or exclusion of consequential or incidental damages so the foregoing exclusions and limitations may not apply to you OTHER This warranty gives you specific legal rights and you may also have other rights which vary from state to state PROOF OF PURCHASE Owner must provide proof of purchase in order to receive any
76. ier The refrigerant leaves the condenser Coil through the liquid line as a warm high pressure liquid It next will pass through the refrigerant drier if so equipped It is the function of the drier to trap any moisture presentin the system contaminants and large particulate matter The liquid refrigerant next enters the metering device The metering device is a capillary tube The purpose of the metering device is to meter i e control or measure the quantity of refrigerant entering the evaporator coil In the case of the capillary tube this is accomplished by design through size and length of device and the pressure difference present across the device Since the evaporator coil is under a lower pressure due to the suction created by the compressor than the liquid line the liquid refrigerant leaves the metering device entering the evaporator coil As it enters the evaporator coil the larger area and lower pressure allows the refrigerant to expand and lower its temperature heat intensity This expansion is often referred to as boiling Since the unit s blower is moving indoor air across the finned surface of the evaporator coil the expanding refrigerant absorbs some of that heat This results in a lowering of the indoor air temperature hence the cooling effect The expansion and absorbing of heat cause the liquid refrigerant to evaporate i e change to a gas Once the refrigerant has been evaporat
77. imeter insulation Lin Ft x 1 00 Based on Linear Feet of outside wall TOTAL HEAT LOSS PER F BTU HR F Multiply total BTU HR F X 30 and plot on the graph below at 40 F Draw a straight line from the 70 base point thru the point plotted at 40 F The intersection of this heat loss line with the unit capacity line represents the winter design heating load AMBIENT TEMPERATURE F BASE POINT 83 84 2 FRIEDRICH Friedrich Air Conditioning Company P O Box 1540 San Antonio TX 78295 210 357 4400 www friedrich com ROOM AIR CONDITIONERS LIMITED 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 Any additional labor cost for removing inaccessible units and or charges for mileage related to travel by a Service Agency that exceeds 25 miles one way will be the responsibility of the owner This remedy is expressly agreed to be the exclusive remedy within twelve months from the date of the original purchase SECOND THROUGH FIFTH YEAR SEALED REFRIGERANT SYSTEM If the Sealed Refrigeration System defined for this purpose as the compressor condenser coil evaporator coil reversing valve check valve capillary filter drier and all interconnecting tubing supplied by FRIEDRICH in your Room Air Conditioner
78. ions excess condensate water caused by extremely humid conditions may result in an undesirable water drip such as on a patio or over an entryway MODEL DC 2 DRAIN KIT Part No 01900 235 can be installed to drain excess condensation to an alternate location Carbon Filter Kits The kits vary depending on the chassis size small medium large Each kit contains three 3 filters WCFS Carbon filter kit for small chassis models WCFM Carbon filter kit for medium chassis models WCFL Carbon filter kit for large chassis models Remote Wall Thermostats RT4 Digital wall thermostat hard wired with single speed fan RT5 Digital wall thermostat hard wired with a digital display two fan speed selection filter check light temperature limiting status indicator light room temperature offset backlight and battery backup Window Installation Kits Standard in Kuhl Models without Heat KWIKS For all ES and YS models KWIKM For all EM and YM models KWIKL For all EL and YL models See www friedrich com for additional accessories for your unit V4 FRIEDRICH ROOM AIR CONDITIONER UNIT PERFORMANCE TEST DATA SHEET JOB NAME TECHS NAME DATE MODEL SERIAL HOW IS ALL OF THE INSTALLATION GOOD BAD YES NO IS ACHASSIS SEAL GASKET INTALLED IS THE FRESH EXAUST AIR VENT OPEN IS AFRIEDRICH SLEEVE INSTALLED IS AFRIEDRICH OUTDOOR GRILLE INSTALLED IS MAINTENANCE BEING PERFORMED If NO is checked use back of s
79. isplay the temperature as it is felt in the room This 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 key then press PY UP or 4 DOWN to toggle between 0 18 C and 8 F 13 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 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 PW UP or d DOWN keys to access any of the menus 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
80. it Service Only M3 Test Mode Access Service Only M4 Provision Switch Setting amp State Factory Use Only 5 Alarms amp History Service Only 6 Factory Use Only Factory Use Only Pressing the Y or A key cycles through the sub menus Press DISPLAY ENTER to enter a sub menu The BACK key is used to exit the menu Extreme care must be taken when modifying parameters in the maintenance menus Temperature High Limit ENTER ENTER Maintenance function 1 is ready to be selected Press DISPLAY ENTER to access the function User presses 4 or v to increment or decrement the upper temperature limit 99 F 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 Temperature Low Limit SCHEDULE Maintenance funtion 2 is ready to be selected Press DISPLAY ENTER to access the fuction User presses or w to increment or decrement the lower temperature limit 60 F is the 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 ENTER M3 Test Mode Access SYSTEM Maintenance function 3 is ready to be selected Press DISPLAY ENTER to access the function User presses the Wor Akey to toggle the Test Mode ON OFF Press the
81. ity 4 error is Unit operates based on standard input mapping Severity 2 error opens all relays Unit will not operate Shutdown heat pump and electric heater Run high fan speed until temp is 100 F Resume operation Third occurance 1 hour locks unit out 13 Flash Prerssure Limit Switch Open If unit is cooling or heat pump on shut down compressor Run high fan until switch closes Resume operation Third occurance in 1 hour locks unit out Discharge Air Temperature Sensor is Sensor Set temp to 75 F Continue to monitor Set error code 14 14 Flash Open or Shorted ON Solid On Heat Pump Error If indoor coil temp x Lesser than ambient temp for 3 minutes Unit uses electric heat to satisfy heating demand I 4 IAmbient temp lt less than and ambient temp gt greater than 130 F a DEINE Set error code 16 ON When cleared return unit to normal 7 Must have compressor enabled and least 2 fan speeds Configuration Unit shuts down Inputs via front panel or t stat are ignored Qualified Technical Service required URGENT Special Test 2 Severity Level 2 Unit operates Qualified Technical Service required Flash I i i Special Test 3 Severity Level 3 Error Is Logged Only Unit operates Severity 3 keeps unit running Attention is needed Solid On OFF Log Only Special Test 4 Severity Level 4 Error is Logged Only Unit operates Severity 4 keeps unit runni
82. ized 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 heat If there are heat producing appliances in use in the room or if the room is heavily occupied the unit will need to run longer to remove the additional heat Be sure to use exhaust vent fans while cooking or bathing and if possible try not to use heat producing appliances during the hottest part of the day The use of higher efficiency components in your new air conditioner may result in the unit running longer than you feel it should This may be more apparent if it replaced an older less efficient model The actual energy usage however will be significantly less when compared to older models The energy efficiency ratio EER and cooling capacity rating Btu h listed on the unit s rating plate are both agency certified COOLING ONLY ROOM AIR CONDITIONERS TROUBLESHOOTING TIPS Problem Possible Cause Possible Solution Check voltage at compressor 115V amp 230V Low voltage EP units will operate at 10 voltage variance Temperature not set cold enough or Set temperature to lower than ambient position room air thermistor inoperative Test thermistor and replace if inoperative Compressor overload If compressor starts add starting components does not run Open or shorted compressor windings Open overload Test overl
83. k Type You may select between a 12 hr and 24 hr clock When 1224 is displayed press the key then press F UP or KA 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 PW UP to go to the next menu BEEP SYSTEM BACK SCHEDULE DISPEAY ENTER User presses or to toggle between Beep 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 key then press PN UP or 4 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 to the next menu EMHT on K hl models or F C for K hl models 4 SCHEDULE DISPLAY ENTER 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 SYSTEM SCHEDULE DISPEAY 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 Hea
84. ket Check installation instructions Reseal as required Dirty evaporator coil Use pressure wash or biodegradable cleaning agent to clean Environmental phenomena point supply louvers upward Put on high fan Chassis gasket not installed Install gasket per Installation manual Downward slope of unit is too Refer to installation manual for proper steep inward installation 61 COOLING ONLY ROOM AIR CONDITIONERS TROUBLESHOOTING TIPS Possible Cause Possible Solution Sublimation Ensure that foam gaskets are installed in When unconditioned saturated between window panes amp in between the outside air mixes with conditioned unit amp the sleeve Also ensure that fresh air condensation forms on the air exhaust vents on applicable models are in Water spitting cooler surfaces the closed position amp are in tact into room Follow installation instructions to ensure that Downward pitch of installation is 4 downward pitch of installed unit is no less than too steep towards back of unit 1 4 4 more than 3 8 Clean amp advise customer of periodic cleanin Restricted coil or dirty filter p 9 amp maintenance needs of entire unit Possible Cause Possible Solution Insufficient air circulation thru area Adjust louvers for best possible air circulation to be air conditioned Excessive moisture Operate MoneySaver position Inadequate vapor barrier in buildi
85. low is always from a higher pressure area to a lower pressure area 4 The temperature at which a liquid or gas changes state is dependent upon the pressure The refrigeration cycle begins at the compressor Starting the compressor creates a low pressure in the suction line which draws refrigerant gas vapor into the compressor The compressor then compresses this refrigerant raising its pressure and its heat intensity temperature The refrigerant leaves the compressor through the discharge Line as a hot High pressure gas vapor The refrigerant enters the condenser coil where it gives up some of its heat The condenser fan moving air across the coil s finned surface facilitates the transfer of heat from the refrigerant to the relatively cooler outdoor air When a sufficient quantity of heat has been removed from the refrigerant gas vapor the refrigerant will condense i e change to a liquid Once the refrigerant has been condensed changed to a liquid it is cooled even further by the air that continues to flow across the condenser coil The RAC design determines at exactly what point in the condenser the change of state i e gas to a liquid takes place In all cases however the refrigerant must be totally condensed changed to a Liquid before leaving the condenser goi i Suction c Line Coil Metering Device e Refrigerant __ Strainer uaaal Refrigerant Dr
86. lves also have a capillary tube from the compressor discharge tube to the pilot valve The piston assembly in the main valve can only be shifted by the pressure differential between the high and low sides of the system The pilot section of the valve opens and closes ports for the small capillary tubes to the main valve to cause it to shift NOTE System operating pressures must be near normal before valve can shift FROM VALVE DISCHARGE 4 WAY REVERSING VALVE 43 AA TESTING THE REVERSING VALVE SOLENOID COIL A WARNING ELECTRIC SHOCK HAZARD Unplug and or disconnect all electrical power to the unit before performing inspections maintenances or service Failure to do so could result in electric shock serious injury or death The solenoid coil is an electromagnetic type coil mounted on the reversing valve and is energized during the operation of the compressor in the heating cycle Turn off high voltage electrical power to unit Unplug line voltage lead from reversing valve coil Check for electrical continuity through the coil If you do not have continuity replace the coil 4 Check from each lead of coil to the copper liquid line as it leaves the unit or the ground lug There should be no continuity between either of the coil leads and ground if there is coil is grounded and must be replaced 5 If coil tests okay reconnect the electrical leads 6 Make sure coil has been assembled correctly NOTE
87. ly units C R G Y For cooling with electric heat units C R G Y W For heat pump units C R G Y W B For two fan speeds thermostat must have 2 fan speed selection During Heat Pump Mode The B terminal must be continuously energized The W terminal must have 24 VAC output to call for heat The control board decides on whether to turn on the Heat Pump Heat compressor or Electric Heat The Y terminal should not have 24 VAC output during heat mode Connecting a Remote Wall Thermostat N CAUTION It is the installer s responsibility to ensure that all control wiring connections are made in accordance with the installation instructions Improper connection of the thermostat control wiring and or tampering with the unit s internal wiring can void the equipment warranty Failure to follow these instructions can result in personal injury and damage to product or other property To enable the remote thermostat operation remove the jumper between terminals FP amp F2 on the interface connector Connect the thermostat using Figure 1 and Table 1 as a guide Procedure 1 Unplug the unit 2 Unscrew and remove the decorative front cover Page 30 3 Locate the Interface Connector 24 VAC terminal strip See figure 1 at left and remove the jumper wire at FP and F2 4 Make the wire connections according to the configuration needed for your unit see above or page 68 for wiring diagrams 5 Once each wire is ma
88. materials may lead to deterioration of the aluminum fins or the coil end plates NOTE It is extremely important to insure that none of the electrical and or electronic parts of the unit get wet Be sure to cover all electrical components to protect them from water or spray BLOWER WHEEL HOUSING CONDENSER FAN SHROUD Inspect the indoor blower and its housing evaporator blade condenser fan blade and condenser shroud periodically yearly or bi yearly and clean of all debris lint dirt mold fungus etc Clean the blower housing area and blower wheel with an antibacterial antifungal cleaner Use a biodegradable cleaning agent and degreaser on condenser fan and condenser shroud Use warm or cold water when rinsing these items Allow all items to dry thoroughly before reinstalling them ELECTRONIC ELECTRICAL MECHANICAL Periodically at least yearly or bi yearly inspect all control components electronic electrical and mechanical as well as the power supply Use proper testing instruments voltmeter ohmmeter ammeter wattmeter etc to perform electrical tests Use an air conditioning or refrigeration thermometer to check room outdoor and coil operating temperatures BLOWER FAN MOTOR The motor is permanently lubricated 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 condensa
89. meor ______ Lowcoo 140400101010 mhear ee MED HEAT HE OW HEAT HP Polop Tol x mHeat EH JOO MED Heat E ____ o LLowneAT En mean ______ x olelolololo SUPPLY CORD OR GREEN YELLOW TO CAPACITOR BRACKET TO INNERWALL MOTOR MOUNT NEUTRAL 115 V USER INTERFACE L2 230 208 V MEDIUM ELECTRIC HEAT U LZ HL ELECTRIC HEAT HTR REVERSING CYCLE RV v P0000 QS Q COMPRESSOR COMPRESSOR 05 5 HERM CAP CAPACITOR THERMISTER ae COMBINATION TERMINAL OLP OVERLOAD PROTECTOR GROUNDED LEAD SYMBOL UI USER INTERFACE INSULATOR TF THERMAL FUSE HTR HEATER ELEMENT HL HEATER LIMIT FUSE PART NO REV 92170008 00 9 76 THERMISTORS RESISTANCE VALUES This Table Applies to All Thermistors TEMP INDOOR AIR SENSOR RES I STANCE RESISTENCE K Ohms TOLERANCE F wn wn M 25 225 548 6 5 ET 190 889 6 25 15 161 325 03 10 x O 9241 97 662 10 92 5 38 5 38 10 70 339 73 812 4 94 15 59 864 62 688 4 72 20 51 060 53 357 4 50 25 43 654 45 523 4 28 30 37 415 38 934 4 06 I 36290 37 747 32 35 202 36 601 33 34 150 35 492 3 93 34 33 133 34 421 3 89 35 32 151 33 386 3 84 36 31 20
90. n Flash Outdoor Coil gt grater than 175 F Flash Flash Special Test 1 Severity Level 1 0 2 22 23 g Outdoor Coil Temperature lt 30 F for 2 Unit will use electric heat to satisfy heating demands until temp gt 45 F OFF Log Only consecutive Minutes Unit must be a Heat Pump OFF Loa Frost Protection for Heat Pump Only Unit will run active defrost a minimum of 6 minutes when Heat Pump YS10M10 run time is greater than 60 minutes and outdoor coil temp is 26 F or less Flash Continue with normal operation Continue to monitor sensor Open or Shorted 24 N Key Sequence Action Enter Maintenance Menu Press SYSTEM SCHEDULE BACK DISPLAY ENTER for 6 secs or until double beep sounds amp Reset Error Codes amp Error History Press for secs or until double beep sounds TROUBLESHOOTING TIPS NOTE To more accurately identify the problem first check for current maintenance alerts and their history Possible Cause Possible Solution Turn the unit to the on position and raise or lower temperature setting as appropriate to call for operation The unit is turned to the off position or the thermostat is satisfied Plug into a properly grounded 3 prong receptacle See Electrical Rating Tables on 6 for the proper receptacle type for your unit The LCDI power cord is
91. n Unit Does Not Cool Heat Room Sufficiently Or Cycles On And Off Too Frequently continued Unit Runs Too Much The outside temperature is below 60 F 16 C The digital control is set to fan cycling mode The air conditioner has insufficient cooling capacity to match the heat gain of the room The air conditioner has insufficient heating capacity to match the heat loss of the room This may be due to an excessive heat load in the room It may also be due to an improperly sized unit This may be normal for higher efficiency EER air conditioners You may notice that the discharge air temperature of your new air conditioner may not seem as cold as you may be accustomed to from older units This does not however indicate a reduction in the cooling capacity of the unit Do not try to operate your air conditioner in the cooling mode when the outside temperature is below 60 F 16 C The unit will not cool properly and the unit may be damaged Since the fan does not circulate the room air continuously at this setting the room air does not mix as well and hot or cold spots may result Using the continuous fan setting is recommended to obtain optimum comfort levels Check the cooling capacity of your unit to ensure it is properly sized for the room in which itis installed Room air conditioners are not designed to cool multiple rooms Check the heating capacity of your unit Air conditioners are s
92. n Shades Shades Awnings X Factor Northeast sq ft 20 Use East These factors are for single glass sq ft 25 only only For glass block multiply the Sq 20 the above factors by 0 5 for double glass or storm windows multiply the largest Southeast South Southwest above factors by 0 8 Sq ft load West _ Sq ft Use Northwest ft _ only North sqft one WINDOWS Heat by conduction Total of all windows Single glass Double glass or glass block WALLS Based on linear feet of wall Light Construction Heavy Construction a Outside walls North Exposure 30 20 Other than North exposure 60 30 b Inside Walls between conditioned and unconditioned spaces only 4 ROOF OR CEILING Use one only Roof uninsulated Roof 1 inch or more insulation Ceiling occupied space above Ceiling insulated with attic space above Ceiling uninsulated with attic space above Floor Disregard if floor is directly on ground or over a basement 6 NUMBER OF PEOPLE 600 7 LIGHTS AND ELECTRICAL EQUIPMENT IN USE watts 3 DOORS AND ARCHES CONTINUOUSLY OPENED TO UNCONDITIONED SPACE TOTAL LINEAR FEET OF WIDTH 9 SUBTOTAL joke 10 TOTAL COOLING LOAD BTU per hour to be used for selection of room air conditioner s Total in Item 9 X Factor from Map 81 82 HEAT LOAD FORM The heat load form on the following page may be used by servicing pers
93. ng structure particularly floors Possible Cause Possible Solution Defective thermistor Replace thermistor or electronic control board See sizing chart Correct as needed Chassis seal gasket not sealing or Check gasket Reposition or replace as absent causting unit to short cycle needed Clean amp advise customer of periodic cleanin Restricted coil or dirty filter 9 amp maintenance needs of entire unit Possible Cause Possible Solution Defective indoor ambient thermistor Check alarms Replace thermistor or electronic or electronic control board control board Unit short cycles Prolonged off cycles Defective remote wall t stat Replace t stat Possible Cause Possible Solution Evaporator drain pan cracked or Repair clean or replace as required obstructed Wala Detach shroud from pan amp coil Clean amp Outside water P remove old sealer Reseal reinstall amp check leaks Use pressure wash or biodegradable cleanin Obstructed condenser coil ng agent to clean Fan blade slinger ring improperly Adjust fan blade to 1 2 of condenser coil fin positioned pack 62 HEAT COOL ONLY ROOM AIR CONDITIONERS TROUBLESHOOTING TIPS Problem Possible Cause Possible Solution Bad indoor ambient thermistor Check error codes Replace as needed Room temperature Fan speed too low Set at higher fan speed uneven Heating cycle Opened door windows etc Close
94. ng the discharge pressure replace the valve Dented or damaged valve body or capillary tubes can prevent the main slide in the valve body from shifting If you determing this is the problem replace the reversing valve After all of the previous inspections and checks have been made and determined correct then perform the Touch Test on the reversing valve FROM OUTDOOR COIL IO COMPRESSOR SUCTION TO INDOOR COIL _ 4 HOT BOTH THE SAME TEMPERATURE COOL BOTH THE SAME TEMPERATURE FROM COMPRESSOR DISCHARGE Reversing Valve in Heating Mode TO OUTDOOR COIL BOTH THE SAME TEMPERATURE Touch Test in Heating Cooling Cycle A WARNING BURN HAZARD Certain unit components operate at temperatures hot enough to cause burns E Proper safety procedures must be followed and proper protective clothing must be worn Failure to follow these procedures could result in minor to moderate injury The only definite indications that the slide is in the mid position is if all three tubes on the suction side of the valve are hot after a few minutes of running time NOTE A condition other than those illustrated above and on Page 44 indicate that the reversing valve is not shifting properly Both tubes shown as hot or cool must be the same corresponding temperature Procedure For Changing Reversing Valve WARNING HIGH PRESSURE HAZARD Sealed Refrigeration System contains refrigerant
95. nnected in series with the common motor terminal Should the internal temperature and or current draw become excessive the contacts in the overload will open turning off the compressor The overload will automatically reset but may require several hours before the heat is dissipated Checking the Internal Overload 1 With no power to unit remove the leads from the compressor terminals 2 Using an ohmmeter test continuity between terminals C S and C R If no continuity the compressor overload is open and the compressor must be replaced Single Phase Resistance Test WARNING ELECTRIC SHOCK HAZARD Turn off electric power before service or installation Extreme care must be used if it becomes necessary to work on equipment with power applied Failure to do so could result in serious injury or death Remove the leads from the compressor terminals and set the ohmmeter on the lowest scale R x 1 Touch the leads of the ohmmeter from terminals common to start to S Next touch the leads of the ohmmeter from terminals common to run C to Add values C to S and C to R together and check resistance from start to run terminals S to R Resistance S to R should equal the total of C to S and C to In a single phase PSC compressor motor the highest value will be from the start to the run connections 5 to The next highest resistance is from the start
96. oad protector amp replace if inoperative Open capacitor Test capacitor amp replace if inoperative Test for continuity in all positions Replace if Inoperative system button U Inoperative switch or electronic board Refer to appropriate wiring diagrams to check Broken loose or incorrect wiring S die iin wiring Correct as needed Possible Cause Possible Solution Inoperative system button Test button amp replace user interface if inoperative Check for continuity amp resistance Broken loose or incorrect wiring Refer to applicable wiring diagram Fan motor Open capacitor Test capacitor amp replace if inoperative does not run Fan speed button defective Heplace user interface if inoperative Test fan motor amp replace if inoperative be sure Inoperative fan motor Internal overload has had time to reset Possible Cause Possible Solution Undersized unit Refer to industry standard sizing chart Indoor ambient thermistor open See alarms and replace thermistor if needed or shorted Dirty filter Clean as recommended in Owner s Manual Dirty or restricted condenser or Use pressure wash or biodegradable cleaning Does not cool or evaporator coil agent to clean only cools slightly Adjust discharge louvers Use high fan speed Close doors Instruct customer on use of this Fresh air or exhaust air door open Low capacity undercharge Check for leak amp make repair Check amperage draw against
97. ocess Fahrenheit Celsius Selection You may select between displaying temperature in F or C When F C is displayed press the key then press PW UP or R4 DOWN to toggle between F and C To accept the change press the key to return to the F C screen Press the F 8 UP to go to the next menu FRZ 13 SYSTEM DISPLAY SCHEDULE ENTER User presses or to select between Freeze Protection On amp Freeze Protection Off Press the key to accept the change and exit the selection process Freeze Protection The Kuhl 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 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 PW UP or R4 DOWN to toggle between ON and OFF To accept the change press the key to return to the FRZ screen Press the F UP to go to the next menu TO SYSTEM BACK DISPLAY ENTER User presses PN 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 may not d
98. off for 15 seconds Note the fan delay is disabled during Test Mode Fan Speed Change Delay Relay activation is delayed by a minimum number of seconds The default for this value is 2 seconds and is used to eliminate relay chatter Fan Only System Mode The fan is turned on and runs at the specified manually set speed Only the Fan is turned on Cool or Heat operation are off This is different than FAN MODE CONTINUOUS where the fan is on with the cool or heat operation Fan Only Rules 1 If the SYSTEM FAN ONLY is selected the Auto fan mode is disabled and the fan mode is forced to continuous In addition the auto fan speed is disabled If the user presses the fan speed key the menu will skip over the auto selection The set point temperature display is off 2 Any fan speed may be manually selected during Fan Only Mode 27 28 Fan Operation Front Panel Mode Heat Cool Auto Fan Only Models starting with SS SM have 4 speeds Models with SL and all Kuhl have speeds need Selection AUTO Operation but never turns Off Uses cool set point or heat set point vs ambient Continuous temperature When there 15 no demand operate at the lowest available speed Turns Turns Turns Turns On or On or On or On or AUTO operation turns On or Off with Off with Off with Off with Off with heat or cool demand heat or heat or heat or heat or Uses cool set point or heat cool cool cool cool set p
99. oint vs ambient demand demand demand demand temperature Mode 1278 Fan ICON Detail The system may have a 3 or 4 speed fan The Fan Speed ICON will Display as per the table below Medium High AUTO peu prz pecu P gt PET E Note that in the AUTO mode the speed of the fan will be shown by illuminating the number of bars in the speed triangle 4 Speed 3 Speed Fan Mapping Relay 2 Display Text Fan Map WallStat Front Panel 4 2 Speed Fan 3 Speed Fan 4 Speed Fan UNIT OPERATION WITH A WALL STAT Front Panel Display Operation in Wall Stat Mode The indoor ambient temperature sensor is disabled All buttons are disabled with the following exception A Maintenance commands B The user menu for Freeze protection Display Enter button for Kuhl only units C First Button push to illuminate the back light display will dim Maintenance features are operational This includes the Check Filter Lock Panel M3 M4 M5 and the Service wrench icon Under T stat operation as a default the selected operating Mode Cool Heat or Fan will not show on the front panel The Service ICON X 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 or High for 3 speed units T stat selected must have 2 speed capabilities Thermostat terminals
100. om air conditioning is operating Multiply the total wattage by the factor given 8 Multiply the total width linear feet of any doors or arches which are continually open to an unconditioned space by the applicable factor NOTE Where the width of the doors or arches is more than 5 feet the actual load may exceed the calculated value In such cases both adjoining rooms should be considered as a single large room and the room air conditioner unit or units should be selected according to a calculation made on this new basis Total the loads estimated for the foregoing 8 items 10 Multiply the subtotal obtained in item 9 by the proper correction factor selected from the map for the particular locality The result is the total estimated design cooling load in BTU per hour For best results a room air conditioner unit or units having a cooling capacity rating determined in accordance with the NEMA Standards Publication for Room Air Conditioners CN 1 1960 as close as possible to the estimated load should be selected In general a greatly oversized unit which would operate intermittently will be much less satisfactory than one which is slightly undersized and which would operate more nearly continuously Intermittent loads such as kitchen and laundry equipment are not included in this form COOLING LOAD ESTIMATE FORM HEAT GAIN FROM OUANTITY FACTORS BTU Hr DAY Quantity x Factor No Inside Outside Area WINDOWS Heat gain from the su
101. om 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 Compressor Lock Out Time The lockout feature ensures that the compressor is de energized for a period of time The timer varies randomly from 180 to 240 seconds The compressor lockout is initiated every time the compressor is off due to 1 Satisfying the temperature set point 2 Changing mode to fan only or heat 3 Turning the unit off 4 Control is first plugged in or power is restored after failure 5 Line power is restored from a brown out condition Wait ICON Hour Glass The wait icon will be turned on when the compressor is locked out and during demand for cooling or heat pump compressor operation The Wait ICON will be turned off when the condition clears Cooling Fan Delay Fan cycle Auto mode only When unit cycles cooling ON starts the fan 5 seconds EARLY When unit cycles cooling OFF DELAYS the fan off for 30 seconds Note this fan delay is disabled 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 unit cycles Heating OFF DELAYS the fan
102. onnel to determine the heat loss of a conditioned space and the ambient winter design temperatures in which the unit will heat the calculated space The upper half of the form is for computing the heat loss of the space to be conditioned It is necessary only to insert the proper measurements on the lines provided and multiply by the given factors then add this result for the total heat loss in BTU Hr F The BTU Hr per F temperature difference is the 70 F inside winter designed temperature minus the lowest outdoor ambient winter temperature of the area where the unit is installed This temperature difference is used as the multiplier when calculating the heat loss The graph shows the following Left Hand Scale Unit capacity BTU Hr or heat loss BTU Hr Bottom Scale Outdoor ambient temperature base point Heat Pump Model BTU Hr capacity heat pump will deliver at outdoor temperatures Maximum BTU Hr heat pump will deliver at indicated ambient temperature Balance Point Following is an example using the heat load form A space to be conditioned is part of a house geographically located in an area where the lowest outdoor ambient winter temperature is 40 F The calculated heat loss is 184 BTU Hr F Subtract 40 F lowest outdoor ambient temperature for the geographical location from 70 F inside design temperature of the unit for a difference of 30 F Multiply 184 by 30 for a 5500 BTU Hr total heat lo
103. oom This is useful in fall and spring as a means of bringing in fresh outside air when using FAN ONLY It can also be used in the summer with the compressor in the Cooling Mode if you wish TO EXHAUST INDOOR AIR Move the lever to the Exhaust S position This will allow stale air to be expelled to the outside of the dwelling This is especially handy in the spring or fall when indoor air tends to get stale or after a social gathering involving smokers or to remove cooking odors BEST PERFORMANCE Move the lever to the Re Circulate Position Q This is the most efficient mode for cooling and heating E E in 33 COMPONENTS TESTING FAN MOTOR A single phase permanent split capacitor motor is used to drive the evaporator blower and condenser fan A self resetting overload is located inside the motor to protect against high temperature and high amperage conditions See Figure 23 A WARNING ELECTRIC SHOCK HAZARD Disconnect power to the unit before servicing Failure to follow this warning could result in serious injury or death BLOWER FAN MOTOR TEST 1 Determine that capacitor is serviceable 2 Disconnect fan motor wires from fan speed switch or system switch 3 Apply live test cord probes on black wire and common terminal of capacitor Motor should run at high speed 4 Apply live test cord probes on red wire and common terminal of capacitor Motor should run at low spe
104. operating cost of this model was not available the time the range was published OW Ad ENERGY STAR Installation Information Sleeve Dimensions Depth Shell Depth pain with Front Louvers Width A B 25 15 16 25 15 46 Extension Sleeve 550 Into Room 15 15 16 17 1546 20 3 16 16 72 Minimum extensions when mounted in a window Thru the wall Installation Minimum Window Width Extension Finished Outside Max Depth C Minimum Maximum Height Width 16 15 16 16 15 16 18 15 16 26 3 16 Minimum widths achieved using one side curtain assembly as opposed to both in standard installation NOTE S M and L sleeves may be installed in window with no side kits if properly installed Circuit Rating Breaker Circuit Rating Breaker or T D Fuse NEMA SS08M10 SS10M10 SS12M10 and SS14M10 YS10M10 5 15 125V 15 5512 30 SS15M30 SM18M30 SM21M30 pre for 250V 15A SM24M30 SL28M30 ES12M33 ES15M33 YS12M33 250V 20A 6 20P SL36M30 EM18M34 EM24M34 250V 30A 6 30P EL36M35 YM18M34 and YL24M35 Plug Face Power Cord Length ft Wall Outlet Appearance SIDE VIEW 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 by cleaning the filter regularly Provide good air flow Make sure the air
105. ot use a caustic coil cleaning agent on coils or base pan Use a biodegradable cleaning agent and degreaser to prevent damage to the coil and or base pan AIR FILTER The air filter should be inspected 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 as the coil surface can be sharp TO REMOVE WASH AND REPLACE FILTER Lower front panel Use handle on filter to flex filter up and out of retainer Remove filter from unit Clean filter monthly or more frequently if needed Refer to accessories section for filter options 50 COILS AND BASE PAN The indoor coil evaporator coil the outdoor coil condenser coil and base pan should be inspected periodically yearly or bi yearly and cleaned of all debris lint dirt leaves paper etc Clean the coils and base pan with a soft brush and compressed air or vacuum If using a pressure washer be careful not to bend the aluminium fin pack Use a sweeping up and down motion in the direction of the vertical aluminum fin pack when pressure cleaning coils Cover all electrical components to protect them from water or spray Allow the unit to dry thoroughly before reinstalling it in the sleeve NOTE Do not use a caustic coil cleaning agent on coils or base pan Use a biodegradable cleaning agent and degreaser The use of harsh cleaning
106. otor amperage and winding temperature High motor temperature or amperage heats the overload causing it to open breaking the common circuit within the compressor 46 Heat generated within the compressor shell usually due to recycling of the motor is slow to dissipate It may take anywhere from a few minutes to several hours for the overload to reset Checking the Overloads A WARNING ELECTRIC SHOCK HAZARD Turn off electric power before service or installation Extreme care must be used if it becomes necessary to work on equipment with power applied Failure to do so could result in serious injury or death WARNING BURN HAZARD Certain unit components operate at temperatures hot enough to cause burns Proper safety procedures must be followed and proper protective clothing must be worn aaa Failure to follow this warning could result in moderate to serious injury External Overloads With power off remove the leads from compressor terminals If the compressor is hot allow the overload to cool before starting check Using an ohmmeter test continuity across the terminals of the external overload If you do not have continuity this indicates that the overload is open and must be replaced Interrnal Overloads Some model compressors are equipped with an internal overload The overload is embedded in the motor windings to sense the winding temperature and or current draw The overload is co
107. ovides 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 figure 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 A 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 flexibility 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 A rule If a violation is detected the opposite set point will adjust to compensate 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 fr
108. pect suction and discharge line for carbon deposits Remove and clean if necessary Ensure all acid is neutralized 4 Reassemble the system including new drier strainer and capillary tube 5 Proceed with step 8 10 on previous page ROTARY AND SCROLL COMPRESSOR SPECIAL TROUBLESHOOTING AND SERVICE Basically troubleshooting and servicing rotary compres sors is the same as on the reciprocating compressor with only one main exception NEVER under any circumstances liquid charge a rotary compressor through the LOW side Doing so would cause permanent damage to the new compressor 49 ROUTINE MAINTENANCE WARNING ELECTRIC SHOCK HAZARD Turn off electric power before inspections maintenances or service Extreme care must be used if it becomes necessary to work on equipment with power applied Failure to do so could result in serious injury or death WARNING EXCESSIVE WEIGHT HAZARD Use two people to lift or carry the unit and wear proper protective clothing Failure to do so may result in personal injury WARNING CUT SEVER HAZARD Be careful with the sharp edges and corners Wear protective clothing and gloves etc Failure to do so could result in serious injury NOTICE Units are to be inspected and serviced by qualified service personnel only Use proper protection on surrounding property Failure to follow this notice could result in moderate or serious property damage NOTICE Do n
109. r h Ec Ls Blower Wheel Ay Nal F Fan Blade Air Intake From b ql Fan Blower Motor Sides and Bottom Basa Pan Control Key Pad E User Interface Oooo 51 52 ROUTINE MAINTENANCE Continued Standard Filter Cleaning Installation Instructions STEP 1 filter grip and pushing the filter holder upward and outward Figure 1 Remove the filter by grabbing it from its handle lifting it up and swinging it out Figure 2 AN FILTER HANDLE Swing the door open and remove the filter by grasping the STEP 2 Slide the filter grip out from the filter as shown in Figure NOTE Make sure the front frame with the mesh filter is facing you Figure 3 FILTER Swing the front frame open Clean the front frame by washing the dirt from the filter Use a mild soap solution if necessary Allow filter to dry Figure 4 TOP TAB FRONT FRAME WITH STANDARD MESH FILTER STEP 4 Install the filter grip back into the filter by sliding it into the filter STEP 5 Install the filter back into the unit Follow the Instructions on the inside of the front door NOTE The filter handle slides into the frame in only one direction If the tab in the frame stops the handle from sliding in slide the filter halfway up tilt it towards the front of you then gently slide it up fully Do not force the handle into the frame ROUT
110. rature The factory preset lower 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 TOP VIEW 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 TEMPERATURE DOWN SCHEDULE SCHEDULE JH na FAN SPEED COOL HEAT FAN ONLY ICON ICON ICON SYSTEM MODE AUTO AUTO CONTINUOUS wae NANA VIN IN SCHEDULE ICON 2 X 16 SEGMENT DISPLAY 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 whi
111. s 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 Fresh Air Vent Reversing Valve Evaporator Coil Electronic Control Board Control Key Pad pi Support Bar 4 Blower Wheel Air Intake From Sides and Bottom Control Key Pad User Interface ER i r z a oe io A W iw i I CIR D i k 79 Q i ma _ lt 23 w k lt gt i 2 k 9 k 3 L t Q 2 k k ilU E e 1 i 1 _ Outdoor Grille Discharge Air VA 4 Condenser Coil Sleeve Ful Air Intake Vents Fan Blade Fan Blower Motor Base Pan Chassis Pull Out Handle 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 Identification code on page 6 MODEL AND SERIAL NUMBER LOCATION HORI s HHH MODEL NUMBE
112. ser can press F or kd 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 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 Time Setting When in the User Menu on the Control Panel use the UP and DOWN to select TIME Push the hours segment flashes Use the UP and DOWN to set the hour then push Ea The minutes segment flashes Use the F UP and KA DOWN to set the minutes then push NOTE Ifthe AM or PM indicator is incorrect push until the hours segment flashes use the PW UP or DOWN to advance the hour segment 12 hours then push The day of the week displays Use the UP or d DOWN to select the current day Press the key to save and go back to the TIME screen Press IN UP to go to the next menu 1224 NOTE Pressing the button again will exit the user menu function mode Or simply leave the control inactive for 15 minutes and the control will return back to normal operation SYSTEM DISPLAY ENTER User presses or to toggle the format between 12 and 24HR display To exit the selection process and accept the change press the key Cloc
113. set button latches and remains in to resume normal operation Electrical overload overheating or cord pinching can trip Reset button pops out the LCDI power cord NOTE Adamaged power supply cord must be replaced with a new power supply cord obtained from the product manufacturer and must not be repaired Ensure that the return and or discharge air The return discharge air grille is blocked x paths are not blocked by curtains blinds furniture etc a Ensure that all windows and doors are closed The temperature is not set at a cool Adjust the Temperature control to a cooler or enough warm enough setting warmer setting as necessary Unit Does Not Cool Heat C Clean the filter See Routine Maintenance or The filter is dirty or obstructed Room Sufficiently Or Cycles remove obstruction On And Off Too Frequently The indoor coil or outdoor coil is Clean the coils See Routine Maintenance or dirty or obstructed remove obstruction sure to use exhaust vent fans while cooking There is excessive heat or moisture or bathing and if possible try not to use heat cooking showers etc in the room producing appliances during the hottest part of the day The temperature of the room you Allow additional time for the air conditioner to are trying to cool is extremely hot cool off a very hot room 57 58 TROUBLESHOOTING TIPS Continued Possible Cause Possible Solutio
114. sor Set Point amp Heat Demand Threshold 2 Electric Heat Start Threshold A Temp Below Set Point Electric Heat Reversing Valve Trigger Compressor Lock 0 Heat Pump On Delay 5 Sec Fan Off Delay 30 Ser Delay 30 Sec til Heat Control Heat Pump amp Electric Heat Delay 15 Sec Off If the compressor is locked out amp 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 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 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
115. ss for the calculated space On the graph plot the base point 70 and a point on the 40 F line where it intersects with the 5500 BTU Hr line on the left scale Draw a straight line from the base point 70 through the point plotted at 40 F This is the total heat loss line Knowing that we have a 5500 BTU Hr heat loss and we expect that our heat pump will maintain a 70 F inside temperature at 40 F outdoor ambient we plot the selected unit capacity BTU Hr ofthe unit between 35 and 60 on the graph and draw a straight line between these points Where the total heat loss line and the 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 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 amp DOORS Area sq ft Single Glass Sq Ft x 1 13 Double Glass Sq Ft x 0 61 INFILTRATION WINDOWS amp DOORS AVG Lin Ft x 1 0 Loose Lin Ft x 2 0 CEILING Area Sq Ft Insulated 6 Sq Ft x 0 07 Insulated 2 Sq Ft x 0 10 Built up Roof 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 Lin Ft x 1 70 1 Per
116. st capacitor and replace if needed Restricted or low air flow through Check for proper fan speed or blocked condenser coil or evaporator coil coils Correct as needed Compressor running abnormally hot Check for kinked discharge line or restricted condenser Refrigerant overcharge Check amperage connections Possible Cause Possible Solution Unit does not Incorrect wiring Check power supply Check LCDI plug Check wire connections Check if panel is locked Refer to appropriate wiring diagram Defective thermistor Replace thermistor or electronic control Possible Cause Possible Solution Poorly installed Fan blade striking chassis Noisy operation Compressor vibrating Refer to Installation Manual for proper installation Reposition adjust motor mount Check that compressor grommets have not deteriorated Check that compressor mounting parts are not missing Improperly mounted or loose Check assembly amp parts for looseness cabinet parts refrigerant tubes rubbing amp rattling pipes etc Possible Cause Possible Solution Evaporator drain pan overflowing Clean obstructed drain trough Condensation forming underneath base pan Poor installation resulting in rain ing th Water leaks into entering the room the room Condensation on discharge grille louvers Evaporator drain pan broken or cracked Reseal or replace No chassis gasket installed Install chassis gas
117. sting troubleshooting handling 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 fins 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 specified 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 fire 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 sufficient 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 seriou
118. t The K hl 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 PW UP or 4 DOWN to toggle between ON and OFF To accept the change press the key to return to the EMHT screen Press the WW 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 SYSTEM SCHEDULE The menu allows the user to adjust the minimum spread between the Auto Cool set point and the Auto Heat set point Press the PN or kd key to adjust The adjust range is to 10 Auto Changeover Dead Band A buffer Zone between heating and cooling in which no conditioning occurs For Kuhl 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 F W UP K A DOWN to toggle between and 10 To accept the change press the to return to the BAND screen Press the UP to go to the next menu F C SYSTEM 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 pr
119. t 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 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 A WARN NG You can be killed or seriously injured if you do not follow instructions A CA UTION You can receive minor or moderate injury if you do not follow instructions 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 A message to alert you of potential property damage will have the NO TIC
120. tched and connected the unit is now ready to be controlled by the thermostat 6 Reattach the decorative front cover see page 30 Note Under T Stat operation the front panel is disabled except the Maintenance functions see page 29 for details Remote Wall Thermostat Location The thermostat should not be mounted where it may be affected by drafts discharge air from registers hot or cold or heat radiated from the sun appliances windows etc The thermostat should be located about 5 Ft above the floor in an area of average temperature with good air circulation Mercury bulb type thermostats MUST be level to control temperature accurately to the desired set point Electronic digital type thermostats should be level for aesthetics Thermostat Location THERMOSTAT SHIELD Note An improperly operating or poorly located remote wall thermostat can be the source of perceived equipment problems A careful check of the thermostat s location and wiring must be made then to ensure that it is not the source of problems Desk Control The unit s electronic control has built in provisions for connection to an external switch to control power to the unit The switch can be a central desk control system or even a normally open door switch For desk control operation connect one side of the switch to the D1 terminal and the other to the D2 terminal See page 32 Whenever the switch closes the unit operation will stop Maximum
121. te water leaking inappropriately which could cause water damage to surrounding property SLEEVE DRAIN Inspect the sleeve and drain system periodically at least yearly or bi yearly and clean of all obstructions and debris Clean both areas with an antibacterial and antifungal cleaner Rinse both items thoroughly with water and ensure that the drain outlets are operating correctly Check the sealant around the sleeve and reseal areas as needed DECORATIVE FRONT COVER Clean the front cover when needed Use a mild detergent Wash and rinse with warm water Allow it to dry thoroughly before reinstalling it in the chassis The decorative front and the cabinet can be cleaned with warm water and a mild liquid detergent Do NOT use solvents or hydrocarbon based cleaners such as acetone naphtha 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 area inside and outside to ensure that the unit s clearances have not been compromised or altered Accumulator A _ Outdoor Grille Compressor Fresh Air Vent Reversing Valve E x b Discharge Air _ N 7 iin es LES Y CH Evaporator Coil Condenser Coil Electronic Control AS zh V Sd DIO BN Sleeve Control Key Pad Y QT Air Intake Vents Support a
122. ters 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 have fuses they should be of the time delay type Before you install 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 must be replaced with a grounded receptacle by a certified electrician 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 Press RESET See Figure 1
123. the condition is satisfied the FRZ display is removed If the room 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 button delays the freeze protection function for five 5 minutes Low Battery When the battery is low a warning display 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 Special Functions Panel Lock The front panel push buttons can be locked to prevent inadvertent operation To lock the front panel press and hold the buttons for three 3 seconds A double beep indicates your mode change was successful and E icon appears on the display To unlock the display press and hold the PER buttons for three 3 seconds The fI icon will no longer be visible Filter Reset If the 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 word 331 will no longer be visible User Menu Functions The User Menu
124. to AUTO or in COOL or HEAT Mode Heating function only available on Kuhl units SCHEDULE For display only No user selectable options 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 Action Press BACK key for 3 sec play double beep 2 PressDISPLAY ENTER key for 3 sec play double beep 22 Press SYSTEM SCHEDULE BACK DISPLAY ENTER for 3 sec play double beep 2 Press SCHEDULE once each time Press SCHEDULE for 3 sec play double beep 4 Press 4 v for 3 5 play double beep 2 Press SCHEDULE DISPLAY ENTER for 3 sec play double beep 2 14 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 sequentiall
125. tomatic operation In the mode the fan only turns on and off when the compressor operates or the heat function is enabled In the SYSTEM FAN ONLY Mode is not available In the mode fans speed is determined by your selection on the button SPEED Figure 1 FAN AUTO COOL HEAT ONLY MODE MODE MODE MODE REQUIRED SYSTEM OUTDOOR TEMP ROOM TEMP MODE CONTINUOUS W AW AWAY SCHEDULE BUTTONS SCHEDULE ON OFF MAINTENANCE RETURN NIGHT SCHEDULE PERIODS FAN SPEED Button Used to sequentially select between fan speeds Depending on your model you can select between LOW MED HIGH and MAX and AUTO Max setting not available on SL and Kuhl models 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 When auto is selected 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 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
126. us property damage Read understand and follow the above warning Wire Size Use ONLY wiring size recommended for single outlet branch circuit Fuse Circuit Breaker Use ONLY the correct HACR type and size fuse circuit breaker Read electrical ratings on unit s rating plate Proper circuit protection is the responsibiity of the homeowner Grounding Unit MUST be grounded from branch circuit through service cord to unit or through separate ground wire provided on permanently connected units Be sure that branch circuit or general purpose outlet is grounded Receptacle The field supplied outlet must match plug on service cord and be within reach of service cord Do NOT alter the service cord or plug Do NOT use an extension cord Refer to the table above for proper receptacle and fuse type The consumer through the AHAM Room Air Conditioner Certification Program can be certain that the AHAM Certification Seal accurately states the unit s cooling and G 7 heating capacity rating the amperes and the energy efficiency ratio HACR Heating Air Conditioning and Refrigeration CERTIFI RATING CAPACITY EER 4 AMPERES AHAM WARNING Before Operating Your Unit NOTICE Do not use the LCDI device as an ON OFF switch 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 adap
127. using the motor to overheat and possibly cycle open the compressor overload protector Continued overheating of the motor windings and or cycling of the overload will eventually lead to compressor motor or overload failure Method Of Charging Repairs The acceptable method for charging the WallMaster 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 itis 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 charge left in the unit To charge by this method requires the following steps 1 Install a piercing valve to remove refrigerant from the sealedsystem Piercing valve must be removed from the system before recharging 2 Recover Refrigerant in accordance with EPA regulations WARNING BURN HAZARD Proper safety procedures must be followed 2 and proper protective clothing must be worn when working with a torch Failure to follow these procedures could result in moderate or serious injury 3 Install a process tube to sealed system CAUTION FREEZE HAZARD Proper safety procedures must be followed and proper protective clothing must be worn when working with liquid refrigerant Failure to follow these procedures could result in minor to moderate injury 4 Make necessary repairs to
128. warranty related services All service calls for explaining the operation of this product will be the sole responsibility of the consumer All warranty service must be provided by an Authorized FRIEDRICH Service Agency unless authorized by FRIEDRICH prior to repairs being made 10 08 TECHNICAL SUPPORT CONTACT INFORMATION 4 FRIEDRICH 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 877 599 5665 x 846 FAX 210 357 4490 Email tac friedrich com www friedrich com Printed in the U S A g FRIEDRICH 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 Kuhl ServMan 5 10
129. with a combination of R 410A and nitrogen and check for leaks using a suitable leak detector Recover refrigerant per EPA guidelines 9 Once the sealed system is leak free install solenoid coil on new valve and charge the sealed system by weighing in the proper amount and type of refrigerant as shown on rating plate Crimp the process tubes and solder the ends shut Do not leave Schrader or piercing valves in the sealed system NOTE When brazing a reversing valve into the system it is of extreme importance that the temperature of the valve does not exceed 250 F at any time Wrap the reversing valve with a large rag saturated with water Re wet the rag and thoroughly cool the valve after each brazing operation of the four joints involved The wet rag around the reversing valve will eliminate conduction of heat to the valve body when brazing the line connection 45 COMPRESSOR CHECKS WARNING ELECTRIC SHOCK HAZARD Turn off electric power before service or installation Extreme care must be used if it becomes necessary to work on equipment with power applied Failure to do so could result in serious injury or death Locked Rotor Voltage L R V Test Locked rotor voltage L R V is the actual voltage available at the compressor under a stalled condition Single Phase Connections Disconnect power from unit Using a voltmeter attach one lead of the meter to the run R terminal on the compressor and the ot
130. y of coil Block condenser coil amp switch unit to cooling Allow pressure to build up in system then switch to heating If valve fails to shift replace valve Inoperative system switch Check for continuity of system switch Problem Possible Cause Action Heating capillary tube partially Check for partially starved outer coil Replace restricted heating capillary tube Switch unit several times from heating to Cooling adequate cooling Check temperature rise across but heating coil Refer to specification sheet for correct insufficient temperature rise Denergize solenoid coil raise head pressure energize solenoid to break loose If valve fails to make complete shift replace valve Unit cools when heat is called for Reversing valve fails to shift Check valve leaking internally Reversing valve failing to shift completely bypassing hot gas TROUBLESHOOTING CHART HEAT PUMP REFRIGERANT SYSTEM DIAGNOSIS COOLING CYCLE Low Load Conditions High Load Conditions Low Load Conditions High Load Conditions Low Air Flow Across High Air Flow Across Refrigerant System Low Air Flow Across Indoor Coil Indoor Coil Restriction Outdoor Coil Refrigerant System Reversing Valve not Reversing Valve not Overcharged Restriction Fully Seated Fully Seated Undercharged Overcharged Undercharged Noncondensables air in System Moisture in System Defective Compressor Defective Compressor 64 HEAT PUMP ROOM AIR CONDITIONERS TROU
131. y select Cool Ed HEAT and FAN ONLY operation When the button is pressed the display indicates which mode has been selected via a display message Note that when the heating function is not available the system will automatically skip the HEAT and AUTO modes FAN MODE Button Selects between automatic or 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 017919 In the mode fan speed is determined by your selection on the button SIDE VIEW FAN SPEED Button Used to sequentially select new fan speed plus AUTO operation 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 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 difference 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 off Only the schedule icon will be displayed UP and DOWN Arrows Pressing either the PX UP or DOWN button changes the desired room tempe

Friedrich KUHL R-410A User's Manual

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