Friedrich Kuhl KCVS08B10A Service Manual

Standard chassis models using r-32 refrigerant

Hide thumbs

Table Of Contents

Quick Links

Download this manual

Kühl

Kühl +

Heat Pump and Electric Heat

Wallmaster

Wallmaster+

Heat Pump and Electric Heat

93002001_00

Room Air Conditioners

Kuhl

Wallmaster

Standard Chassis Models Using R-32 Refrigerant

115-Volt:

230-Volt:

115-Volt:

230-Volt:

115-Volt:

230-Volt:

PRECISION

KCVS08B10A, KCVS12B10A, KCVM14B10A, KCVQ08B10A

KCVS12B30A, KCVS16B30A, KCVM18B30A, KCVM24B30A, KCVL28B30A, KCVL36B30A

KHVS10B11A, KHVQ10B11A

KHVS12B33A, KHVM24B34A, KHVL28B35A

WCVT10B10A, WCVT12B10A

WCVT10B30A, WCVT12B30A, WCVT16B30A

WHVT14B33A

THE EXPERTS IN ROOM AIR CONDITIONING

Table of Contents

Troubleshooting

Need help?

Do you have a question about the Kuhl KCVS08B10A and is the answer not in the manual?

Questions and answers

Summary of Contents for Friedrich Kuhl KCVS08B10A

Page 1 Room Air Conditioners Kuhl ® PRECISION Kuhl ® Wallmaster ® Standard Chassis Models Using R-32 Refrigerant 115-Volt: KCVS08B10A, KCVS12B10A, KCVM14B10A, KCVQ08B10A Kühl 230-Volt: KCVS12B30A, KCVS16B30A, KCVM18B30A, KCVM24B30A, KCVL28B30A, KCVL36B30A Kühl + 115-Volt: KHVS10B11A, KHVQ10B11A 230-Volt: KHVS12B33A, KHVM24B34A, KHVL28B35A Heat Pump and Electric Heat 115-Volt: WCVT10B10A, WCVT12B10A Wallmaster...
Page 2: Table Of Contents
TABLE OF CONTENTS TABLE OF CONTENTS INTRODUCTION Important Safety Information Personal Injury Or Death Hazards Model Number Reference Guide Serial Number Reference Guide Model And Serial Number Location Component Identification- Wallmaster SPECIFICATIONS Dimensions Electrical Data Electrical Data -Power Cord OPERATION Airflow Selection and Adjustment -Kuhl Airflow Selection and Adjustment -Kuhl Q Airflow Selection and Adjustment -Wallmaster...
Page 3: Table Of Contents
Compressor Replacement Compressor Replacement -Special Procedure in Case of Compressor Burnout Replace The Reversing Valve WIRING DIAGRAMS APPENDIX Available Accessories-Kuhl Available Accessories-Wallmaster Interactive Parts Viewer Limited Warranty Thermistor Resistance Values (This Table Applies to All Thermistors) Friedrich authorized parts depots...
Page 4: Introduction
Installation procedures are not given in this manual. They are given in the Installation/Operation manual which can be acquired on the Friedrich website. Click the Link or scan the QR code to be directed to the Professional page where you can locate our technical literature.
Page 5 CAUTION: Do Not Operate Equipment During Active Stages Of Construction To ensure proper operation, Friedrich requires that all equipment is not operated during active construction phases. This includes active stages of completing framing, drywalling, spackling, sanding, painting, ﬂooring, and moulding in the equipment’s designated conditioning space. The use of this equipment during construction could result in premature failure of the components and/or system and is in violation of our standard warranty guidelines.
Page 6: Personal Injury Or Death Hazards
INTRODUCTION Personal Injury Or Death Hazards WARNING AVERTISSEMENT ADVERTENCIA SAFETY Do not remove, disable Ne pas supprime, désacti- No eliminar, desactivar o or bypass this unit’s ver ou contourner cette pasar por alto los dispositi- FIRST safety devices. Doing so l´unité...
Page 7: Mechanical Hazards
INTRODUCTION PERSONAL INJURY OR DEATH HAZARDS • REFRIGERATION SYSTEM REPAIR HAZARDS: Use approved standard refrigerant recovering procedures and equipment to relieve high pressure before opening system for repair. • Reference EPA regulations (40 CFR Part 82, Subpart F ) Section 608. •...
Page 8: Model Number Reference Guide
FIRST UNIT OF EACH MONTH = 00001 27 = 2027 28 = 2028 MONTH OF MANUFACTURE 01 = JANUARY FACTORY DESIGNATION 02 = FEBRUARY M = FRIEDRICH MTY 03 = MARCH 04 = APRIL 05 = MAY 06 = JUNE 07 = JULY...
Page 9: Model And Serial Number Location
MODEL NUMBER AIR CONDITIONING CO. KCVS12B30A SAN ANTONIO, TEXAS SERIAL NUMBER ASSEMBLED IN MEXICO LICY00008 Figure 103 (Kuhl Model and Serial Number Location) FRIEDRICH AIR CONDITIONING CO. SAN ANTONIO, TX Assembled in Mexico MODEL NUMBER SYSTEM WHVT12B33A MODE SERIAL NUMBER...
Page 10: Component Identification- Wallmaster
INTRODUCTION Component Identification- Wallmaster Figure 107 Intake Grill Evaporator Blower Wheel Scroll User Interface Compressor Reversing Valve Fan Shroud Exterior Grill Decorative Front Blower Wheel Blower Front Wall Sleeve Condenser Main PCB Assembly Fan Motor Fan Blade...
Page 11: Specifications
WHVT14B33A Friedrich room air conditioners are designed to operate in cooling mode with outdoor temperatures from 60˚F to 115˚F. **Rating Conditions: 80 degrees F, room air temp. & 50% relative humidity, with 95 degree F, outside air temp & 40% relative humidity, all systems use R-32.
Page 12: Dimensions
SPECIFICATIONS Dimensions Depth Shell Window Width In-wall Installation Carton Dimensions Minimum Minimum with Front Depth INCHES Finished Hole Inches Inches Extension Extension Inches to Louvers Max. Depth Width Into Room* Outside Height Inches Sleeve Inches Inches Inches * Inches Minimum** Maximum Height Width...
Page 13: Electrical Data
SPECIFICATIONS Electrical Data WARNING CIRCUIT RATING REQUIRED OR TIME DELAY WALL FUSE RECEPTACLE ELECTRIC SHOCK HAZARD MODEL Turn off electric power before service or NEMA installation. VOLT All electrical connections and wiring MUST be KCVS08B10A, KCVS12B10A, the National Electrical Code and all local codes KCVM14B10A, which have jurisdiction.
Page 14: Electrical Data -Power Cord
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.
Page 15: Operation
OPERATION Airflow Selection and Adjustment -Kuhl 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.
Page 16: Airflow Selection And Adjustment -Kuhl Q
OPERATION Airflow Selection and Adjustment -Kuhl Q 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.
Page 17: Airflow Selection And Adjustment -Wallmaster
OPERATION Airflow Selection and Adjustment -Wallmaster 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 left or right, 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.
Page 18: User Interface-Kuhl
OPERATION User Interface-Kuhl All of the control panel function buttons and mode icons can be viewed in Figures 302 and 303. Power On – Press the button to turn on the air conditioner. The power button illuminates to indicate that the power is on. The backlight on the power switch will automatically turn off after 20 seconds of inactivity.
Page 19: User Interface - Kuhl Q
OPERATION User Interface - Kuhl Q All of the control panel function buttons and mode icons can be viewed in Figure 305. Power On – Press the button to turn on the air conditioner. The power button illuminates to indicate that the power is on. The backlight on the power switch will automatically turn off after 20 seconds of inactivity.
Page 20: User Interface- Wallmaster
OPERATION User Interface- Wallmaster All of the control panel function buttons and mode icons can be viewed in Figures 307. Power On – Press the button to turn on the air conditioner. The power button illuminates to indicate that the power is on. The backlight on the power switch will automatically turn off after 20 seconds of inactivity.
Page 21: Accessing Sub-Menus
OPERATION User Interface - All Models Accessing Sub-Menus The MENU button accesses the sub-menu. Press the Menu Button to enter the Menu. See Figure 308. The arrow buttons navigate the 6 menu options. See Figure 309 – LIM – LOCK –...
Page 22: User Interface - All Models
OPERATION User Interface - All Models Navigating Inside the Sub-Menus The MENU button moves you forward through the sub-menu. See Figure 311 The return button moves you backward once inside the LIM and TM menus. See Figure 312. Figure 311 MENU RETURN Figure 312 MENU RETURN...
Page 23 OPERATION User Interface - All Models The LIM Menu (LIMIT) This is the limit menu. See Figure 313. Upon entering the menu, the first option will be to set the lower set-point limit using the arrow buttons. See Figure 314. Then you can set the higher set-point limit using the arrow buttons.
Page 24 OPERATION User Interface - All Models The TM Menu (Timer) This is the TM menu used to set a timer. See Figure 317. In the menu, you set the current time using the arrow buttons. See Figure 318. (Note: These two “set clock” steps will be skipped if the unit is already connected to Wi-Fi.) First, set the hour.
Page 25 OPERATION User Interface - All Models The TM Menu (Timer) continued Auto mode selected. See Figure 321. Set the cool set-point for your first timer period using the arrow buttons. The cooling mode timer only sets the cool set-point. See Figure 322. Next, set the heat set-point for your first timer period.
Page 26 OPERATION User Interface - All Models The TM Menu (Timer) continued Set the cool set-point for the second scheduled timer. See Figure 325. Set the heat set-point for the second timer. Set the time to start the second timer period. See Figure 326. Press the MENU button to complete the time timer setup.
Page 27 OPERATION User Interface - All Models The F-C Menu (Fahrenheit/ Celsius) This menu is used to toggle between Fahrenheit and Celsius. See Figure 328. Using the arrow buttons on the right side switches it from Fahrenheit to Celsius. See Figures 329 and 330. Figure 328 MENU RETURN Figure 329...
Page 28 OPERATION User Interface - All Models The Lock Menu This menu is used to lock the settings with a four(4) digit passcode. This is the Lock Menu. See Figure 331. The menu lock default is off. Use the arrows to toggle between off and on. See Figure 332. This is LOCK on.
Page 29 OPERATION User Interface - All Models The Lock Menu continued The ON on the right side of the display shows the lock function is active. To go back into the menu, select the menu button again. See Figure 335. Enter the password in the same manner it was created. See Figure 336. Entering the correct password will give the user access to all of the sub-menus.
Page 30 OPERATION User Interface The diAG Menu • This menu is used to access the diagnostic codes. See Figure 339. Selecting this sub-menu shows the E that represents “Error.” See Figure 340. • Toggle through the error codes using the arrow keys. See Figure 341. •...
Page 31 OPERATION User Interface The CnCT Menu (WiFi Connection) This menu is used to turn on Wi-Fi connection. This is the CnCT menu. Pressing the menu button will activate Wi-Fi. See Figure 342. To setup WiFi, refer to Wi-Fi setup instructions. The Wi-Fi symbol in the top right corner of the display shows Wi-Fi connection is on.
Page 32: Control Panel
OPERATION Control Panel SYSTEM - The MODE button allows you to sequentially select up to four modes of operation: AUTO Available on select models COOL HEAT Available on select models FAN ONLY AUTO FAN (No Cooling Demand) When in AUTO mode, the fan only operates when the system has a demand to cool or heat the room. In the ON fan mode, the fan operates all the time.
Page 33: Remote Control
OPERATION Remote Control Remote Control - Refer to Figure 344 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 345 for effectiveness).
Page 34: Unit
Noises 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 SPECIFICATIONS FIGURE 205).
Page 35: Unit Cooling Mode
OPERATION Unit Cooling Mode Once the indoor 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.
Page 36 OPERATION Unit Heat Control Operation - HeatPump With Electric Heat If the ambient indoor temperature is below 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 .25˚F above the heat set point turn off the compressor..
Page 37 OPERATION Unit Heat Control Operation - Heat Pump With Electric Heat (Continued) Automatic Emergency Heat If the sealed system fails with a bad reversing valve or anything that causes the indoor coil to get colder than the indoor ambient temperature: 1) If the indoor coil thermistor senses a 5 degree temperature drop as compared to the ambient temperature thermistor and this lasts up to 5 minutes, the control board will switch the unit to electric heat and continue heating with it.
Page 38 OPERATION 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 off for 15 seconds. Fan Speed Change Delay Relay activation is delayed by a minimum number of seconds.
Page 39: General Knowledge Sequence Of Refrigeration
OPERATION General Knowledge Sequence Of Refrigeration 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.
Page 40: Routine Maintenance
ROUTINE MAINTENANCE Remove and Install Front Cover -Kuhl 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. 1. Using a 1/4” nut driver loosen the four (4) captive screws as shown in figure 401 Figure 401 (Remove and Install the Front Cover) Install the decorative front cover.
Page 41: Remove And Install Front Cover -Kuhl Q
ROUTINE MAINTENANCE Remove and Install Front Cover -Kuhl Q Remove the decorative front cover. WARNING 1. Remove screws if installed. EntryGard™ 2. Open the decorative front cover door. ELECTRIC SHOCK HAZARD 3. Locate and disconnect electronic control power Disconnect power to the unit before cable harness.
Page 42: Remove And Install Front Cover -Wallmaster
ROUTINE MAINTENANCE Remove and Install Front Cover -Wallmaster WARNING ELECTRIC SHOCK HAZARD Disconnect power to the unit before servicing. Failure to follow this warning could result in serious injury or death. Decorative Front Assembly Filter Intake Grill Chassis removal Handel Screws (4 ea) Figure 403 (Remove and Install the Decorative Front Assembly) Install the decorative front cover.
Page 43: Cord Routing Change-Kuhl
ROUTINE MAINTENANCE Cord Routing Change-Kuhl STEP 1 Remove the 3 screws as shown from the access panel. Unplug unit. Save to reinstall later. WARNING PANEL SCREWS (3) Electrical Shock Hazard Make sure your electrical receptacle has the same configuration as your air conditioner’s plug.
Page 44 ROUTINE MAINTENANCE Cord Routing Change-Kuhl STEP 5. If running power cord to the right of the unit, install the cord into STEP 3. Push electrical cord strain relief back upward into the electrical control the cord retainer clips along the bottom front of the unit. panel.
Page 45 ROUTINE MAINTENANCE Cord Routing Change-Kuhl Q Unplug unit. Your Kühl Q unit will come with the power cord already installed and routed to the left side of the unit. WARNING For convenience and optimum appearance the direction of the power cord can be changed from left to right by following the procedure below.
Page 46: Cord Routing Change-Kuhl Q
ROUTINE MAINTENANCE Cord Routing Change-Kuhl Q CLOSE UP OF CORD UNDER LEFT MOUNTING SCREW EMBOSSMENT FACTORY SETTING WITH LEFT-SIDE CORD PLACEMENT Figure 412 Figure 414 STEP 2: NEW CORD ALIGNMENT FOR ROUTING CORD EXIT TO THE RIGHT OF UNIT Figure 413...
Page 47: Air Filter
ROUTINE MAINTENANCE Coils & Chassis NOTE: Do not use a caustic (alkaline) or acidic cleaning agent on coils or base pan. Use a biodegradable cleaning agent and de greaser. The use of harsh cleaning materials may lead to deterioration of the aluminum fins or the coil end plates. The indoor coil and outdoor coils and base pan should be inspected periodically (annually or semi-annually) and cleaned of all debris (lint, dirt, leaves, paper, etc.) as necessary.
Page 48: Standard Filter Removal / Installation Instructions - Kuhl
ROUTINE MAINTENANCE Standard Filter Removal / Installation Instructions - Kuhl 1. Swing the door open, See Figure 404, and remove the filter by grasping the filter grip and pushing the filter holder upward and outward. See Figure 416. 2. Slide the filter grip out from the filter as shown in Figure 417. NOTE: Make sure the front frame with the mesh filter is facing you.
Page 49: Premium Carbon Filter Removal / Installation Instructions -Kuhl
ROUTINE MAINTENANCE Premium Carbon Filter Removal / Installation Instructions -Kuhl 1. Remove the filter per Standard Filter Removal Installation Refer to Figure 415 and 416. 2. Hold the filter at the top and slide the grip out as shown on Figure 417. 3.
Page 50: Filter Removal / Installation Instructions - Kuhl Q
ROUTINE MAINTENANCE Filter Removal / Installation Instructions - Kuhl Q Swing the door open, See Figure 410,and remove the filter by grasping the filter grips and pulling the bottom towards you. . See Figure 411. Clean the front frame by removing the carbon filter (if installed) and washing the dirt from the filter. Use a mild soap solution if necessary. Allow filter to dry. NOTE: The carbon filter is not a reusable filter, and needs to be replaced every three months for optimum efficiency.
Page 51: Remove And Install The Chassis
REMOVE AND INSTALL THE CHASSIS Remove The Chassis - Kuhl CAUTION Do not push, pull, Use Handle or lift from Locations center of support (both sides) RETAINER SCREWS AND WASHERS ENTRYGARD RETAINER WIRE FAR RIGHT SCREW Figure 423 (Chassis Removal and Installation) WARNING ELECTRIC SHOCK HAZARD Disconnect power to the unit before...
Page 52: Install The Chassis -Kuhl
REMOVE AND INSTALL THE CHASSIS Install The Chassis -Kuhl CAUTION Do not push, pull, Use Handle or lift from Locations center of support (both sides) 1. Carefully team lift the chassis and set it into the cabinet. 2. Slide the chassis stopping approximately 3” from full insertion. 3.
Page 53: Kuhl Q
REMOVE AND INSTALL THE CHASSIS Kuhl Q 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 chassis 1. Remove the EntryGard™ Screws. (Refer to Figure 426) 2.
Page 54: Wallmaster
8. Check that filter is properly installed, and reinstall front panel. Remove the front panel on the WSE SLEEVE. Remove the rear WEATHER PANEL. Reverse grille. Place lower edge into sleeve tab (Friedrich logo facing out). Align slots with the screw holes. Secure grille with screws.
Page 55: Disassembly
DISASSEMBLY Kuhl-Open Electrical Box (To access Power Cord and Fixed Orifice) Remove the front cover. 4. Remove electrical box cover (3 screws). See figure 503. Remove the chassis from the sleeve. 3. Remove 4 screws holding PCB assy to brackets. Slide PCB assy back to ac- cess electrical box cover screws.
Page 56: Component Testing
COMPONENT TESTING Replace the Main PCB (Kuhl) 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.
Page 57: Troubleshooting
IS THE FRESH / EXHAUST AIR VENT OPEN? _____ ____ AREA TO BE APPROXIMATE IS A FRIEDRICH SLEEVE INSTALLED? _____ ____ CONDITIONED COOLING BTU IS A FRIEDRICH OUTDOOR GRILLE INSTALLED? _____ ____ IN SQ. FT. REQUIRED IS MAINTENANCE BEING PERFORMED? _____ ____ 100 - 150 5000...
Page 58: Diagnostic Codes
TROUBLESHOOTING Diagnostic Codes Figure 603 DIAG PROBLEM DESCRIPTION CORRECTIVE ACTION CODE Front Panel Button Stuck For 1. Ensure front cover does not depress buttons. More Than 20 Seconds. 2. Check wiring connections from UI to Inverter board. 3. Replace UI and Cable. 4.
Page 59 TROUBLESHOOTING Diagnostic Codes Figure 603 DIAG PROBLEM DESCRIPTION CORRECTIVE ACTION CODE Discharge Air greater than Unit Shuts down electric heater. When 185°F. discharge air temperature is less than 100°F. operation resumes. High Pressure Switch Open. Unit shuts down compressor. Operation 1.
Page 60: Diagnostic Codes-Inverter
TROUBLESHOOTING Diagnostic Codes-Inverter Figure 604 DIAG PROBLEM CONDITIONS POSSIBLE CAUSES CORRECTIVE ACTION CODE Inverter fan fault The feedback signal of outdoor fan 1. Fan blade is stuck. 1. Remove object from condenser fan or cannot be detected. 2. PCB and motor unconnected. evaporator blower wheel.
Page 61 TROUBLESHOOTING Diagnostic Codes-Inverter Figure 604 DIAG PROBLEM CONDITIONS POSSIBLE CAUSES CORRECTIVE ACTION CODE 7802 The DC voltage on the electrolytic 1. The voltage of power supply is 1. Check wiring and connections from PCB to DC Bus Over capacitor exceeds the set limit value too high.
Page 62 TROUBLESHOOTING Diagnostic Codes-Inverter Figure 604 DIAG PROBLEM CONDITIONS POSSIBLE CAUSES CORRECTIVE ACTION CODE 8212 1. Detect the fault when the 1. AC power out of range. See figure 608 compressor is running; 2. System abnormal. Compressor Module 2. The peak current of compressor 3.
Page 63: Basic Troubleshooting
TROUBLESHOOTING Figure 605 Basic Troubleshooting Problem Possible Cause Possible Solution The power button is off or the set point Push the power button on and raise or lower temperature setting (as ap- temperature is satisfied. propriate) to call for operation. Plug into a properly grounded 3 prong receptacle.
Page 64: Troubleshooting Tips
TROUBLESHOOTING Figure 606 Troubleshooting Tips Problem Possible Cause Possible Solution Unit undersized. Test cooling performance & replace with larger unit if Excessive heat load needed. See sizing chart. Compressor runs continually & does not cycle off Restriction in line Check for partially iced coil & check temperature split across coil Thermistor shorted Replace thermistor or electronic control board Compressor relay contacts stuck...
Page 65 TROUBLESHOOTING Figure 606 Troubleshooting Tips Problem Possible Cause Possible Solution Defective thermistor Replace thermistor or electronic control board Unit oversized See sizing chart. Correct as needed. Chassis seal gasket not sealing or ab- Unit short cycles Check gasket. Reposition or replace as needed sent causing unit to short cycle Clean &...
Page 66: For Loss Of Compressor Motor Control, Compressor Startup Faults, And Compressor Phase Overcurrent
TROUBLESHOOTING Figure 607 For loss of compressor motor control, compressor startup faults, and compressor phase overcurrent Fault Code 18: Inverter Immediate Fault 1 (7810, 7813, 7800) Loss of Compressor Control, Compressor Startup Fault, Compressor Phase Over Current) Are filer or coils dirty Clean Filter and coils or obstructed Is wiring to Compressor loose Repair or correct damaged, or wiring incorrect? Is there a restriction or block Repair refrigeration in refrigeration system system? Pressure too high? Has compressor See compressor Replace if it has a malfunctioned checks malfunction Replace Main PCB...
Page 67: Compressor Module Over Current
TROUBLESHOOTING Figure 608 Compressor Module Over Current Fault Code 19: Inverter Immediate Fault 2 (8212) Compressor Module Over Current Check to see if input power Address power supply is out of range supply problem Is wiring to Compressor loose Repair or correct damaged, or wiring incorrect? Is there a restriction or block Repair refrigeration in refrigeration system system? Pressure too high? Has compressor See compressor Replace if it has a malfunctioned checks malfunction Replace Main PCB...
Page 68: Component Testing
COMPONENT TESTING Reversing Valve A reversing valve is a component of a heat pump that changes the direction of refrigerant flow, allowing the system to function in both heating and cooling WARNING modes. ELECTRIC SHOCK HAZARD It consists of a pressure-operated, main valve and a pilot valve actuated by a solenoid plunger.
Page 69: Compressor Checks
COMPONENT TESTING Compressor Checks WARNING WARNING ELECTRIC SHOCK HAZARD BURN HAZARD Turn off electric power before service or installation. Proper safety procedures must be followed, All electrical connections and wiring MUST be and proper protective clothing must be worn when working with a torch. the National Electrical Code and all local codes which have jurisdiction.
Page 70: Components Testing
COMPONENTS TESTING Fan Motor The Fan Motor installed in your Kuhl or Wallmaster unit is a dual shaft bldc motor driving both the condenser fan and the indoor blower wheel. The procedure for checking a 115 vac motor is also the same as checking a 230 vac motor.
Page 71: Heating Element
COMPONENTS TESTING Heating Element WARNING Heating Element Example 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.
Page 72: Thermistors Description
COMPONENTS TESTING Thermistors Description 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.
Page 73: R-32 Sealed System Repair
R-32 SEALED SYSTEM REPAIR General Information WARNING: Electrical Shock Hazard Disconnect all power to the unit before starting maintenance. All electrical connections and wiring MUST be installed by a qualiﬁed electrician and conform to all codes which have jurisdiction. Failure to do so can result in property damage, severe electrical shock or death.
Page 74 R-32 SEALED SYSTEM REPAIR General Information Warning: No ignition sources: No person carrying out work in relation to a REFRIGERATING SYSTEM which involves exposing any pipe work shall use any sources of ignition in such a manner that it may lead to the risk of fire or explosion. All possible ignition sources, including cigarette smoking, should be kept sufficiently far away from the site of installation, repairing, removing and disposal, during which refrigerant can possibly be released to the surrounding space.
Page 75: Required Equipment
R-32 SEALED SYSTEM REPAIR Required Equipment • Ventilation fan. • Class ABC fire extinguisher. Process Tube adapter kit • Recovery access tool. • • Purge hose fittings • Pinch off and opening tools ABC Fire Extinguisher Recovery Machine Vaccum Pump Nitrogen Guage Manifold Vaccum Guage...
Page 76: Refrigerant Removal, Recovery, And Evacuation
R-32 SEALED SYSTEM REPAIR Refrigerant Removal, Recovery, and Evacuation NOTE: When accessing the refrigerant in the system to make repairs or for any other purpose, conventional procedures shall be used. However, for FLAMMABLE REFRIGERANTS (R-32 is classified in the A2L group for mildly flammable refrigerants) it is important that best practice is followed since flammability is a consideration.
Page 77: Component Replacement/Brazing
R-32 SEALED SYSTEM REPAIR Component Replacement/Brazing Warning: • Ensure sufficient ventilation at the repair place. Warning: Presence of fire extinguisher. If any hot work is to be conducted on the refrigerating equipment or any associated parts, have a ABC class fire extinguisher available to hand.
Page 78: Refrigerant Charging
R-32 SEALED SYSTEM REPAIRS Refrigerant Charging WARNING: Electrical Shock Hazard Disconnect all power to the unit before starting maintenance. All electrical connections and wiring MUST be installed by a qualiﬁed electrician and conform to all codes which have jurisdiction. Failure to do so can result in property damage, severe electrical shock or death. WARNING: This Product uses R-32 Refrigerant Do not use means to accelerate the defrosting process or to clean, other than those recommended by the manufacturer.
Page 79: Compressor Replacement
R-32 SEALED SYSTEM REPAIRS Compressor Replacement 1. Be certain to perform all necessary electrical and refrigeration tests to be sure the compressor is actually defective before replacing. WARNING 2. Recover all refrigerant from the system though the process tubes. Refer to ELECTRIC SHOCK HAZARD Refrigerant Removal, Recovery, and Evacuation Section of this manual).
Page 80: Compressor Replacement -Special Procedure In Case Of Compressor Burnout
R-32 SEALED SYSTEM REPAIRS Compressor Replacement -Special Procedure in Case of Compressor Burnout 1. Recover all refrigerant and oil from the system. Refer to Refrigerant Removal, of this manual. Recovery, and Evacuation Section WARNING 2. Cut and remove compressor and fixed orifice from the system. HIGH PRESSURE HAZARD Sealed Refrigeration System contains refrigerant and oil under high pressure.
Page 81: Replace The Reversing Valve
R-32 SEALED SYSTEM REPAIR Replace The Reversing Valve WARNING WARNING HIGH PRESSURE HAZARD EXPLOSION HAZARD Sealed Refrigeration System contains refrigerant The use of nitrogen requires a pressure and oil under high pressure. regulator. Follow all safety procedures and wear protective safety clothing etc. Proper safety procedures must be followed, and PPE must be utilized Failure to follow proper safety procedures...
Page 82: Wiring Diagrams
WIRING DIAGRAMS Figure 901 KCVS08B10A KCVS12B10A KCVM14B10A KCVS12B30A KCVS16B30A HIGH PRESSURE SWITCH WCVT12B10A WCVT10B10A WCVT10B30A OD COIL WCVT12B30A TEMP SENSOR WCVT16B30A ID COIL TEMP SENSOR AMB TEMP SENSOR DISCH TEMP SENSOR RE-400 RE-401 L1/L LCDI GREEN INDUCTOR / REACTOR...
Page 83 WIRING DIAGRAMS Figure 902 KHVS10B11A ELECTRIC HEAT KHVS12B33A REVERSING VALVE WHVT14B33A KHVQ10B11A OD COIL TEMP SENSOR ID COIL TEMP SENSOR AMB TEMP SENSOR RELAY RELAY RELAY DISCH TEMP SENSOR RE-400 RE-401 L1/L LCDI GREEN RE-400 RE-401 INDUCTOR / REACTOR...
Page 84 WIRING DIAGRAMS Figure 903 KCVM18B30A KCVM24B30A KCVL28B30A KCVL36B30A OD COIL TEMP SENSOR ID COIL TEMP SENSOR RELAY RELAY AMB TEMP SENSOR RELAY DISCH TEMP SENSOR RE-401 RE-400 L2/N L1/L INDUCTOR REACTOR GREEN LCDI POWER SUPPLY 230/208 VAC GROUND...
Page 85 WIRING DIAGRAMS Figure 904 KHVM24B34A REVERSING ELECTRICAL HEATER VALVE COMPRESSOR KHVL28B35A OD COIL TEMP SENSOR ID COIL TEMP SENSOR RELAY RELAY AMB TEMP SENSOR RELAY DISCH TEMP SENSOR RE-401 RE-400 L2/N L1/L INDUCTOR REACTOR GREEN LCDI POWER SUPPLY 230/208 VAC GROUND...
Page 86: Appendix
APPENDIX Kühl Accessories ® Available Accessories-Kuhl MERV 13 Filters/Filter Brackets Kühl air conditioners can utilize an optional FreshAire MERV 13 air filter that’s effective at capturing and removing ® ® microorganisms from the air, which according to ASHRAE , the leading authority on the science behind advanced indoor air quality, include harmful airborne viruses.
Page 87: Available Accessories-Wallmaster
WallMaster Optional Accessories ® APPENDIX Available Accessories-Wallmaster WSE Sleeve/Exterior Grilles IMPORTANT: Operating the air conditioner with incorrect rear grille or without Baffle Adapter Kit (on 19 ¾" deep sleeve) will recirculate discharge air and cause compressor overload to trip. This will cause the unit to shut down temporarily and may lead to premature compressor failure.
Page 88: Interactive Parts Viewer
APPENDIX Interactive Parts Viewer All Friedrich Service Parts can be found on our online interactive parts viewer. Please click on the link below: Interactive Parts Viewer For Further Assistance contact Friedrich customer service at (1-800-541-6645). Limited Warranty Current warranty information can be obtained by referring to...
Page 89: Thermistor Resistance Values (This Table Applies To All Thermistors)
APPENDIX Thermistor Resistance Values (This Table Applies to All Thermistors) RESISTANCE TEMP RESISTENCE (K Ohms) TOLERANCE % CENTR 210.889 225.548 240.224 6.50 6.51 178.952 190.889 202.825 6.25 6.25 151.591 161.325 171.059 6.03 6.03 128.434 136.363 144.292 5.81 5.81 108.886 115.340 121.794 5.60 5.60...
Page 90: Friedrich Authorized Parts Depots
APPENDIX Friedrich authorized parts depots United Products Distributors Inc. The Gabbert Company Reeve Air Conditioning, Inc. 4030A Benson Ave 2501 South Park Road 6868 Ardmore Hallandale, Florida 33009 Halethorpe, MD 21227 Houston, Texas 77054 888-907-9675 954-962-0252 c.businsky@updinc.com 713-747-4110 800-962-3383 800-458-4110 Shivani Refigeration &...

Friedrich Kuhl KCVS08B10A Service Manual

Quick Links

Troubleshooting

Need help?

Questions and answers

Related Manuals for Friedrich Kuhl KCVS08B10A

Summary of Contents for Friedrich Kuhl KCVS08B10A

This manual is also suitable for: