Friedrich R-410A - Manual

4 PROPERTY DAMAGE HAZARDS FIRE DAMAGE HAZARDS: R • ead the Installation/Operation Manual for the air conditioning unit prior to operating. U • se air conditioner on a single dedicated circuit within the speci fi ed amperage rating. Connect to a properly grounded outlet only. • D • o not remove groun...

5 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 m...

6 Serial Number Decade Manufactured L=0 C=3 F=6 J=9 A=1 D=4 G=7 B=2 E=5 H=8 A K A R 00001 Production Run Number Year Manufactured A=1 D=4 G=7 K=0 B=2 E=5 H=8 C=3 F=6 J=9 Product Line R = RAC Month Manufactured A=Jan D=Apr G=Jul K=Oct B=Feb E=May H=Aug L=Nov C=Mar F=Jun J=Sept M=Dec 1st Digit – Funct...

7      E NERGY S TAR ® quali fi ed Model Cooling Capacity Btu Heating Capacity Btu Volts Rated Cooling Amps Cooling Watts Heating Amps Heating Watts COP Energy Ef fi ciency Ratio EER Estimated Yearly Operating Cost Moisture RemovalPints/HR Room Side Air Circulation CFM Sleeve Net Weight...

8 Installation Information / Sleeve Dimensions * Minimum extensions when mounted in a window. ** Minimum widths achieved using one side curtain assembly as opposed to both in a standard installation.NOTE: S,M and L sleeves may be installed in window with no side kits if properly installed. Circuit R...

9 ELECTRICAL DATA ELECTRIC SHOCK HAZARD WARNING Turn off electric power before service or installation.All electrical connections and wiring MUST be installed by a quali fi ed electrician and conform to the National Electrical Code and all local codes which have jurisdiction.Failure to do so can res...

10 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 ...

11 Let’s check out how to control your air conditioner. On the control panel, just to the left of the POWER , is a 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 b...

12 CHECK FILTER appears on screen. The word “ ” appears next to the . n o tt u b The alert is issued when the fan run . s r u o h 0 0 5 n a h t r e t a e r g s i e m it This alert may be reset by the user (Refer to Special Functions, Filter Reset). Maintenance Required – When maintenance is required...

13 User presses or to toggle between Beep On and BeepOff. Press the key to accept the change and exit theselection process. SYSTEM FAN MODE FAN SPEED SCHEDULE BACK DISPLAY ENTER EXIT Audible Alerts – You can select to have the control beep when entering menus. When BEEP is displayed press the key th...

14 Freeze Protection – The Kühl+ models have a special feature that is designed to keep the interior space above freezing by energizing the electric heater anytime the indoor room temperature falls to 40° F (4° C) . With the freeze protection feature turned on, when the unit senses the indoor temper...

15 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 operati...

17 ELECTRONIC CONTROL SYSTEM MAINTENANCE Display Introduction This section contains information on the maintenance alerts, temperature limiting, diagnostic test and how to access. The electronic control system has a built in maintenance sub system which works constantly behind the scenes to help ide...

18 Electronic Control System Maintenance Operation To Enter the Maintenance Section: Press SYSTEM+SCHEDULE+BACK+DISPLAY/ENTER for 6 seconds. There are 5 maintenance sub-menus M1 through M5 . Maintenance Sub-Menus Access M1 – Temperature High Limit Service Only M2 – Temperature Low Limit Service Only...

19 Temperature High Limit Temperature Low Limit M3 – Test Mode Access Maintenance function 1 is ready to be selected. Press DISPLAY/ENTER to accessthe function.User presses or to increment or decrement the upper temperature limit. 99°F is the maximum upper limit. The current stored high limit is dis...

20 M4 – Switch Access (Unit Configuration) FACTORY USE ONLY M6 – Factory Use Only M5 – Error Codes & History Error Code Number of Errors Error Code On/Off Maintenance funtion 5 is ready to be selected. Press DISPLAY/ENTER to access the function. The error code display shows the error code number...

21 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 P...

22 System Set Point Mapping Figure 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 po...

23 ELECTRONIC CONTROL SEQUENCE OF OPERATION Compressor and Reversing Valve Control Cooling De-Energized Energized OnOn Off Off Heat - Heat Pump Heat - ElectricFan Only * The Reversing valve stays in the last state until a call for heat or cooling (see fi gure below) Compressor Operation: Cooling Mod...

24 Heat Control (Heat Pump Only) 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 ...

25 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...

26 Condition 2 If the Δ (delta) (set point temperature minus the ambient indoor temperature) is greater than 5 ˚ F, then the unit will switch to electric heat, if available. The unit will continue to operate with electric heat until the heat demand is satis fi ed. Note that the electric heat switche...

28 Fan Operation (Front Panel Mode) Heat – Cool – Auto – Fan OnlyModels starting with SS, SM have 4 speeds. Models with SL, and all Kuhl+ have 3 speeds Note that in the AUTO mode, the speed of the fan will be shown by illuminating the number of bars in the speed triangle. Speed Selection 1 2 3 4 AUT...

29 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....

30 Remove the decorative front cover by using the tool provided (see fi gure below). Tighten the four (4) captive screws as indicated by the arrows in the fi gure above before closing the front panel (do not over tighten) . Ensure the fi lter is in place. Make sure curtains do not block the side air...

31 REPLACING THE INDOOR COIL THERMISTOR REPLACING THE CONTROL BOARD ELECTRIC SHOCK HAZARD WARNING 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 (...

32 ELECTRIC SHOCK HAZARD WARNING Disconnect power to the unit before servicing. Failure to follow this warning could result in serious injury or death. Low Voltage Interface Connector All Kuhl and Kuhl + units have a low voltage interface connector through which a Remote Wall Thermostat, Desk Contro...

33 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 fl oor in an area of average temperat...

34 CAPACITORS ELECTRIC SHOCK HAZARD WARNING 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...

35 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 “YM” and “EM” models are equipped with a 4.0 KW element. The “YL” and “EL” models are equipped wi...

36 Suction Line Evaporator Coil Metering Device Refrigerant Strainer Discharge Line Condenser Coil Compressor Refrigerant Drier Liquid Line A good understanding of the basic operation of the refrigeration system is essential for the service technician. Without this understanding, accurate troublesho...

37 • 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 fl ammable. • Servicing equipment and components must be speci fi cally desig...

38 Proper refrigerant charge is essential to proper unit operation. Operating a unit with an improper refrigerant charge will result in reduced performance (capacity) and/or ef fi ciency. Accordingly, the use of proper charging methods during servicing will insure that the unit is functioning as des...

39 3. Install a process tube to sealed system. 4. Make necessary repairs to 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. 8. Crimp the process tube and solder the end shut. Proper sa...

40 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 ...

41 Restricted Refrigerant System Troubleshooting a restricted refrigerant system can be dif fi cult. 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 restr...

42 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...

43 NOTE: System operating pressures must be near normal before valve can shift . REVERSING VALVE DESCRIPTION/OPERATION The Reversing Valve controls the direction of refrigerant fl ow to the indoor and outdoor coils. It consists of a pressure-operated, main valve and a pilot valve actuated by a solen...

44 Reversing Valve in Heating Mode TESTING THE REVERSING VALVE SOLENOID COIL 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. 1. Turn off high voltage electrical power to unit. 2. Unplug lin...

45 8. Pressurize sealed system with a combination of R-410A and nitrogen and check for leaks, using a suitable leakdetector. 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 amoun...

46 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 othe...

47 Single Phase Resistance Test t e s d n a s l a n i m r e t r o s s e r p m o c e h t m o r f s d a e l e h t e v o m e Rthe ohmmeter on the lowest scale (R x 1). n o m m o c s l a n i m r e t m o r f r e t e m m h o e h t f o s d a e l e h t h c u o T r e t e m m h o e h t f o s d a e l e h t h c...

48 Recommended procedure for compressor replacement 1. Be certain to perform all necessary electrical and refrigeration tests to be sure the compressor is actually defective before replacing. 2. Recover all refrigerant from the system though the process tubes. PROPER HANDLING OF RECOVERED REFRIGERAN...

49 1. 2. 3. 4. 5. ELECTRIC SHOCK HAZARD WARNING Turn off electric power before service or installation. Failure to do so may result in personal injury, or death. Sealed Refrigeration System contains refrigerant and oil under high pressure. Proper safety procedures must be followed, and proper protec...

50 ROUTINE MAINTENANCE 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 compresse...

51 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....

52 ROUTINE MAINTENANCE (Continued) Standard Filter Cleaning Installation Instructions STEP 1. FILTER FILTERGRIP STEP 3. Swing the front frame open. Clean the front frame by washing STEP 2. NOTE: HANDLE FILTERGRIP TOP TAB FRONTFRAME WITHSTANDARDMESH FILTER A Figure 1 Figure 3 Figure 4 Figure 2 STEP 4...

53 ‹ Ensure that the circuit breaker(s) or 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 ord...

54 Service and Assistance Before calling for service, please check the “Troubleshooting Tips” section on pages 40 and 41. This may help you to fi nd 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. I...

56 Error Code Maintenance ICON Problem Control Board's Action 1 Flash Front Panel Button Stuck For More Than 20 Seconds Continue to monitor for "OPEN" (Unstuck) switch. Do not process switch input. ENSURE FRONT COVER DOES NOT DEPRESS BUTTONS 2 Flash Input Voltage Out of Specification (103 - ...

57 Problem Possible Cause Possible Solution Unit does not operate. The unit is turned to the off position, Turn the unit to the on position and raise or lower temperature setting (as appropriate) to call for operation. The LCDI power cord is unplugged. Plug into a properly grounded 3 prong receptacl...

59 COOLING ONLY ROOM AIR CONDITIONERS: TROUBLESHOOTING TIPS e s u a C e l b i s s o P m e l b o r P Compressor does not run Low voltage Check voltage at compressor. 115V & 230V units will operate at 10% voltage variance Temperature not set cold enough or room air thermistor inoperative Set tempe...

63 HEAT / COOL ONLY ROOM AIR CONDITIONERS: TROUBLESHOOTING TIPS Possible Solution Possible Solution e s u a C e l b i s s o P m e l b o r P Room temperature uneven (Heating cycle) Check error codes. Replace as needed. Bad indoor ambient thermistor Set at higher fan speed. Fan speed too low Close doo...

64 n o i t c A e s u a C e l b i s s o P m e l b o r P Unit cools when heat is called for Incorrect wiring Refer to applicable wiring diagram Defective solenoid coil Check for continuity of coil Reversing valve fails to shift Block condenser coil & switch unit to cooling. Allow pressure to build...

65 HEAT PUMP ROOM AIR CONDITIONERS: TROUBLE SHOOTING TIPS ELECTRICAL TROUBLESHOOTING CHART - HEAT PUMP Reversing Valve Stuck Replace the Reversing Valve Replace the Solenoid Coil NO Is the Solenoid Coil Good? Is Line Voltage Present at the Solenoid Is the Selector Switch Set for Heat? NO SYSTEM COOL...

66 DISCHARGE TUBE SUCTION TUBE to T ube to OUTSIDE from Compressor T ube to INSIDE Capillary T u be Capillary T u be Compressor RIGHT Pilot LEFT Pilot COIL COIL 14 NORMAL FUNCTION OF VALVE VALVE OPERATING DISCHARGE TUBE from Compressor SUCTION TUBE to Compressor Tube to INSIDE COIL Tube to OUTSIDE C...

67 ELECTRONIC CONTROL BOARD COMPONENTS IDENTIFICATION Front Sample board for Kuhl+ unit Back Reversing Valve Max Speed High Speed Med Speed Low Speed T-stat Terminals Transformer voltageSelector Switch115/230 Volts Battery Compartment User Interface connector Transformer 115/230 Volts DISCHARGE

68 REMOTE WALL THERMOSTAT WIRING DIAGRAMS LEGEND FO R T-ST A T WI R ING H AR NESS C Common Terminal GH Call for High Fan GL Call for Low Fan B Reversing Valve Y Coil for Cooling W Call for Heat R 24 VAC Power From Unit RT5 - Two Speeds Fan T-Stat - Field Provided-- -- -- Field Wiring COOL WITH ELECT...

69 KUHL ELECTRONIC CONTROL COOL ONLY MODELS SS08M10A, SS10M10A, SS12M10A, SS14M10A SS12M30A, SS15M30A SM18M30A, SM21M30A, SM24M30A HIGH MAX MEDIUM R S R S C COMPRESSOR ELECTRONIC CONTROL L1 F4 F3 F1 NEUTRAL (115 V) 92170000 COMP L1 L2 OR N 4 3 1 5 BLACK LOW F2 2 OLP BL A C K COMPRESSOR BL U E RED S ...

71 KUHL+ ELECTRONIC CONTROL COOL WITH ELECTRIC HEAT MODELS ES12M33A, ES15M33A EM18M34A, EM24M34A BLACK ORANGE UI HOLDER ELECTRONICS ASY BLACK BLUE HEATER BLACK COMPRESSOR S OLP R C BL U E RED BL A C K RED BRACKET CAPACITOR BLUE TO CHASSIS GREEN O R G R E E N /Y E LL O W BRACKET TO CAPACITOR G R E E ...

72 KUHL+ ELECTRONIC CONTROL COOL WITH ELECTRIC HEAT MODEL EL36M35A L 2 H IG H F 1 F 2 1 R S L 2 ( 230 /20 8 V ) N E U T R A L C O MP E L E C T R IC H E A T C E H 1 ME D IU M L O W E L E C T R IC H E A T F 3 C O MP R E S S O R 3 2 5 6 S R L 1 L 1 ( 115 V ) W I R IN G D IA G R A M U I H O L D E R E L ...

77 Replacement Remote Control Configuration Instructions For Use with Kühl (cool only models) and Kühl + (cool & heat models) Contents: • Remote Control with Holder • (2) AAA-batteries • Instruction Sheet ATTENTION! – You May Need to Configure The Replacement Remote Control Please read instructi...

79 Kühl User Interface Service Kit Replacement Instructions For Use with Kühl (cool only models) and Kühl + (cool and heat models) ATTENTION! - Please read these instructions completely before attempting replacement. Always unplug the power supply from the power supply receptacle. Contents: • User I...

80 INSTRUCTIONS FOR USING COOLING LOAD ESTIMATE FORM FOR ROOM AIR CONDITIONERS (AHAM PUB. NO. RAC-1) A. This cooling load estimate form is suitable for estimating the cooling load for comfort air conditioning installations which do not require specifi c conditions of inside temperature and humidity....

81 COOLING LOAD ESTIMATE FORM HEAT GAIN FROM 1. WINDOWS: Heat gain from the sun. Northeast East Southeast South Southwest West Northwest North 2. WINDOWS: Heat by conduction (Total of all windows.) Single glass Double glass or glass block 3. WALLS: (Based on linear feet of wall) a. Outside walls Nor...

82 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 geogr...

83 HEATING LOAD FORM FRIEDRICH ROOM UNIT HEAT PUMPS BTU/HR PER WALLS: (Linear Feet) °F TEMP. DIFFERENCE 2” Insulation Lin. Ft. x 1.6 Average Lin. Ft. x 2.6 WINDOWS & DOORS (Area, sq. ft.) Single Glass: Sq. Ft. x 1.13 Double Glass: Sq. Ft. x 0.61 INFILTRATION - WINDOWS & DOORS: AVG. Lin. Ft. ...

84 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 purch...

FRIEDRICH AIR CONDITIONING CO. Post Of fi ce 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: [email protected] Printed in the U.S.A. TECHNICAL SUPPORT CONTACT INFORMATI...