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Service Literature
EL23XCV (HFC- 410A) SERIES OUTDOOR UNITS
WARNING
Improper installation, adjustment, alteration, service
or maintenance can cause property damage, personal
injury or loss of life. Installation and service must be
performed by a licensed professional HVAC installer or
equivalent, service agency, or the gas supplier.
IMPORTANT
This unit must be matched with an indoor coil as specified
with AHRI. For AHRI Certified system match-ups and
expanded ratings, visit www.LennoxPros.com. Coils
previously charged with HCFC-22 must be flushed.
CAUTION
As with any mechanical equipment, contact with sharp
sheet metal edges can result in personal injury. Take
care while handling this equipment and wear gloves and
protective clothing.
WARNING
To prevent serious injury or death:
1. Lock-out/tag-out before performing maintenance.
2. If system power is required (e.g., smoke detector
maintenance), disable power to blower, remove fan
belt where applicable, and ensure all controllers
and thermostats are set to the "OFF" position before
performing maintenance.
3. Always keep hands, hair, clothing, jewelry, tools, etc.
away from moving parts.
UNIT INFORMATION
Corp. 100040
February 14, 2023
Table of Contents
Model Number Identification ...........................................2
Typical Serial Number Identification ...............................2
Specifications ................................................................3
Electrical Data ...............................................................3
Unit Dimensions - Inches (mm) ....................................4
Typical Unit Parts Arrangement .....................................5
Operating Gauge Set and Service Valves ......................8
Installation ....................................................................10
Unit Placement ............................................................10
Removing and Installing Panels ...................................13
New or Replacement Line Set ......................................14
Brazing Connections ...................................................17
Flushing Line Set and Indoor Coil ................................20
Leak Testing the System .............................................22
Evacuating Line Set and Indoor Coil ...........................24
Servicing Units Delivered Void of Charge ...................34
Unit Start-Up ...............................................................34
System Operation and Service ...................................35
Unit Selection Code for Outdoor Control .....................43
Configuring Unit ............................................................46
stat ................................................................................47
System Overview..........................................................47
mostat ...........................................................................47
Maintenance .................................................................48
Unit Wiring Diagrams....................................................49
Unit Sequence of Operation ........................................50
Component Testing .......................................................53
6-Pin Sensor Harness (DIS, AMB, COIL) ....................68
Sensor Harness ...........................................................68
System Refrigerant .......................................................76
Charge Mode Jumper ..................................................76
Page 1
EL23XCV
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Page 1: Table Of Contents
EL23XCV UNIT INFORMATION Corp. 100040 February 14, 2023 Service Literature EL23XCV (HFC- 410A) SERIES OUTDOOR UNITS Table of Contents Model Number Identification ...........2 Typical Serial Number Identification .......2 Specifications ..............3 Electrical Data ...............3 Unit Dimensions – Inches (mm) ........4 Typical Unit Parts Arrangement ........5 Operating Gauge Set and Service Valves ......8 Installation ..............10 Unit Placement ............10... -
Page 2: Model Number Identification
This outdoor unit is designed for use in systems that use General Information the following refrigerant metering device: These instructions are intended as a general guide and do • Thermal expansion valve (TXV) not supersede national or local codes in any way. Consult IMPORTANT: Special procedures are required for clean- authorities having jurisdiction before installation. -
Page 3: Specifications
HACR type breaker or fuse. Refer to National or Canadian Electrical Code manual to determine wire, fuse and disconnect size requirements. Used with the Lennox S40 Smart Wi-Fi Thermostat for optional service diagnostics. ® Freezestat is recommended for low ambient operation. -
Page 4: Unit Dimensions - Inches (Mm)
Unit Dimensions – Inches (mm) UNIT SUPPORT FEET 16-7/8 26-7/8 (429) (683) SUCTION LINE 8-3/4 CONNECTION (222) 3-3/4 (95) LIQUID LINE CONNECTION 30-3/4 (781) TOP VIEW 4-5/8 3-1/8 (117) (79) TOP VIEW BASE SECTION (Large Base) 39-/12 (1003) 35-1/2 (902) DISCHARGE AIR LIQUID LINE CONNECTION... -
Page 5: Typical Unit Parts Arrangement
Typical Unit Parts Arrangement CONTROL PANEL EL23XCV-024, -036, -048 OUTDOOR CONTROL DC INVERTER CONTROL GROUND LUG INVERTER REACTOR CONTACTOR – SPST CONTROL PANEL EL23XCV-060 OUTDOOR CONTROL DC INVERTER INVERTER CONTROL REACTOR GROUND LUG CONTACTOR – SPST FIGURE 1. Control Panel Components Page 5... - Page 6 TYPICAL PLUMBING COMPONENTS FIGURE 2. Component Locations EL23XCV-024, -036, -048 Page 6...
- Page 7 TYPICAL PLUMBING COMPONENTS FIGURE 3. Component Locations EL23XCV-060 (Scroll Compressor Model) Page 7...
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Page 8: Operating Gauge Set And Service Valves
Gauge hoses must be rated for use at up to 800 psig recess. of pressure with a 4000 psig burst rating. See the Lennox Service and Application Notes #C-08-1 for further details and information. OPERATING SERVICE VALVES The liquid and vapor line service valves are used for re-... - Page 9 SERVICE VALVES ANGLE AND BALL Operating Angle Type Service Valve: 1. Remove stem cap with an appropriately sized wrench. 2. Use a service wrench with a hex-head extension (3/16” for liquid line valve sizes and 5/16” for vapor line valve sizes) to back the stem out counterclockwise as far as it will go.
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Page 10: Installation
Installation PLACING UNIT ON SLAB Unit Placement When installing unit at grade level, the top of the slab See Unit Dimensions on page 5 for sizing mounting slab, should be high enough above grade so that water from platforms or supports. higher ground will not collect around the unit. - Page 11 STABILIZING UNIT ON UNEVEN SURFACES ROOF MOUNTING Locate the unit above a load-bearing wall or area of the IMPORTANT roof that can adequately support the unit. Consult local codes for rooftop applications. Unit Stabilizer Bracket Use (field-provided): NOTICE Always use stabilizers when unit is raised above the factory height.
- Page 12 INSTALL UNIT LEVEL OR, IF ON A SLOPE, MAINTAIN SLOPE TOLERANCE OF 2 DEGREES (OR 2 INCHES PER 5 FEET [50 MM PER 1.5 M]) AWAY FROM BUILDING STRUCTURE. Install unit away from windows. BUILDING STRUCTURE MOUNTING SLAB TWO 90° ELBOWS INSTALLED IN LINE SET WILL REDUCE LINE SET VIBRATION.
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Page 13: Removing And Installing Panels
Removing and Installing Panels LOUVERED PANEL REMOVAL Remove the louvered panels as follows: IMPORTANT! DO NOT ALLOW PANELS TO HANG ON UNIT BY TOP TAB. TAB IS FOR ALIGNMENT AND NOT DESIGNED TO SUPPORT WEIGHT OF PANEL. 1. Remove PANEL SHOWN SLIGHTLY ROTATED TO ALLOW TOP TAB TO EXIT (OR ENTER) TOP SLOT FOR REMOVING (OR INSTALLING) PANEL. -
Page 14: New Or Replacement Line Set
13.8 kPa). empty all existing traps. Polyvinyl ether (PVE) and polyol WARNING ester (POE) oils are used in Lennox variable-capacity units charged with HFC-410A refrigerant. Residual Refrigerant can be harmful if it is inhaled. Refrigerant mineral oil can act as an insulator, preventing proper must be used and recovered responsibly. - Page 15 • Between 51 and 150 Linear Feet: Crankcase heater • Additional oil is not required for systems with line lengths and nonbleed port TXV factory installed. No additional up to 150 feet. components required. Vertical vapor riser must be sized SUCTION TRAPS to the vapor riser listed in the table 4 on systems with For systems with the outdoor unit 5 - 60 feet above the...
- Page 16 LINE SET IMPORTANT — Refrigerant lines must not contact structure. INSTALLATION REFRIGERANT LINE SET — INSTALLING Line Set Isolation — The following illustrations are VERTICAL RUNS (NEW CONSTRUCTION SHOWN) examples of proper refrigerant line set isolation: NOTE — Insulate liquid line when it is routed through areas where the surrounding ambient temperature could become higher than the REFRIGERANT LINE SET —...
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Page 17: Brazing Connections
IMPORTANT Brazing Connections Use the procedures outlined in figures 5 and 6 for brazing Allow braze joint to cool before removing the wet rag line set connections to service valves. from the service valve. Temperatures above 250ºF can damage valve seals. WARNING IMPORTANT Danger of fire. - Page 18 CAP AND CORE REMOVAL PIPING PANEL REMOVAL AND LINE SET PREPARATION Remove service cap and core from both the suction and liquid line service ports. Remove piping panel for easier access to service valves. Cut ends SERVICE PORT CAP of the refrigerant lines square (free from nicks or dents) and debur the ends.
- Page 19 WRAP SERVICE VALVES To help protect service valve seals during brazing, wrap water-saturated cloths around service valve bodies and copper tube stubs. Use additional water-saturated cloths underneath the valve body to protect the base paint. FLOW NITROGEN Flow regulated nitrogen (at 1 to 2 psig) through the refrigeration gauge set into the valve stem port connection on the liquid service valve and out of the suction / vapor valve stem port.
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Page 20: Flushing Line Set And Indoor Coil
Flushing Line Set and Indoor Coil TYPICAL EXISTING FIXED ORIFICE TYPICAL EXISTING EXPANSION VALVE REMOVAL REMOVAL PROCEDURE (UNCASED PROCEDURE (UNCASED COIL SHOWN) COIL SHOWN) STUB END TWO PIECE PATCH PLATE LIQUID LINE CHECK DISTRIBUTOR TUBES (UNCASED COIL ONLY) ORIFICE EXPANSION LIQUID LINE ORIFICE HOUSING HOUSING VALVE... - Page 21 FLUSHING LINE SET AND INDOOR COIL (2 OF 2) TYPICAL NEW CHECK EXPANSION VALVE INSTALLATION PROCEDURE THIS OUTDOOR UNIT IS DESIGNED FOR USE IN SYSTEMS THAT USE A CHECK EXPANSION VALVE METERING DEVICE. SEE THE UNIT PRODUCT SPECIFICATIONS FOR APPROVED EXPANSION VALVE KIT MATCH-UPS AND APPLICATION INFORMATION. THE EXPANSION VALVE UNIT CAN BE INSTALLED INTERNAL OR EXTERNAL TO THE INDOOR COIL.
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Page 22: Leak Testing The System
Take care to WARNING empty all existing traps. Polyvinyl ether (PVE or POE) oils are used in Lennox variable-capacity units charged Refrigerant can be harmful if it is inhaled. Refrigerant with HFC-410A refrigerant. Residual mineral oil can must be used and recovered responsibly. - Page 23 LEAK TEST NOTE - NORMALLY, THE HIGH PRESSURE HOSE IS CONNECTED TO THE LIQUID LINE PORT. HOWEVER, CONNECTING IT TO THE VAPOR PORT BETTER PROTECTS THE MANIFOLD GAUGE SET FROM HIGH PRESSURE DAMAGE. LINE SET AND INDOOR COIL HIGH MANIFOLD GAUGE SET CONNECT GAUGE SET CONNECT AN HFC-410A MANIFOLD GAUGE SET HIGH PRESSURE HOSE TO THE VAPOR VALVE SERVICE PORT.
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Page 24: Evacuating Line Set And Indoor Coil
Evacuating Line Set and Indoor Coil CONNECT GAUGE SET HIGH NOTE — Remove cores from service valves (if not already done). Connect low side of manifold gauge set with 1/4 SAE in-line tee to vapor line service valve Connect high side of manifold gauge set to liquid line service valve OUTDOOR MANIFOLD... - Page 25 The Possible equipment damage. Lennox M30, ComfortSense 7500, ComfortSense 3000 Avoid deep vacuum operation. Do not use compressors and many other commercially available electronic thermo- to evacuate a system.
- Page 26 EL23XCV Thermostat Control Options Qty. of EL23XCV Field Wiring Thermostat Type Indoor Unit Type Wires to Terminal Strip Unit Operation Diagram EL23XCV Connections S30/S40 Comunicating Gas Fully Communicating Variable Capacity Communicating R, I+, I-, C Figure 15 Furnace or Air Handler Operation Based Upon Thermostat Demand Thermostat Conventional 24VAC...
- Page 27 ROUTE CONTROL WIRES Communicating Thermostat Wiring Maximum length of wiring (18 gauge) for all connections on the RSBus is 1500 feet (457 meters). Wires should be color-coded, with º º a temperature rating of 95 F (35 C) minimum, and solid-core (Class II Rated Wiring). All low voltage wiring must enter unit through field-provided field-installed grommet installed in electrical inlet.
- Page 28 EL23XCV DATS (Optional) RAST 6-Pin Connectors OATS (Optional) Communicating Indoor Unit EL23XCV Outdoor Unit HD Display S30 Smart Hub Subbase or Mag-Mount PROVIDED RAST 6-PIN CONNECTOR INDOOR CONTROL Indoor Control Single Wire To C Terminal Single Wire To C Terminal Unused Wires Unused Wires FIGURE 15.
- Page 29 FIGURE 16. Conventional 24VAC Cooling Non-Communicating Thermostat Wiring Page 29...
- Page 30 5 – Outdoor Unitary Control - Jumpers and Terminals 7 SEGMENT DISPLAY CHARGE MODE JUMPER (CHRG MODE) CHARGE MODE AND OPERATION MODE JUMPER DETAIL OPERATION MODE JUMPER PUSH BUTTON RAST TERMINALS FOR THERMOSTAT WIRING CONNECTION EL23XCV Charge Mode Operation with a Convention- Outdoor Control 7 Segment Display and al 24VAC Non-Communicating Thermostat Push Button...
- Page 31 When the Operation Mode jumper is installed in the “Com- The unit capacity will be controlled in the variable capac- fort Mode” the suction pressure setpoint is 125 psig. ity mode throughout the range of capacity from minimum capacity to maximum capacity. If the Y2 demand remains Unit Operation after 20 minutes, the EL23XCV control will begin to ramp up the compressor capacity until maximum capacity is...
- Page 32 TABLE 6 Outdoor Control Terminal Designations and Input /Outputs (see figure 15 for terminal locations) Designator Description Input Output Common Switched 24VAC Unused on EL23XCV, for heat pump applications only nominal Unused on EL23XCV, for heat pump applications only 24VAC common Low pressure switch (not used on EL23XCV) 5ma @ 18VAC Low pressure switch sensing connection (not used on...
- Page 33 Table 6 continued Outdoor Control Terminal Designations and Inputs / Outputs WARNING - Electric Shock Hazard. Can cause injury or death. Unit must be grounded in accordance with national and local codes. The 4 pins in P6 have the potential of transferring up to 250 volts to the unit cabinet ground. Designator Description Input...
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Page 34: Servicing Units Delivered Void Of Charge
Table 6 continued Designator Description Input Output Common Pressure transducer Supply Voltage Pin 1 Suction Pressure Out 5 VDC of 3 Pressure transducer output voltage Pin 2 Suction Pressure In 0-4.5 VDC of 3 Suction Pressure GND Pressure transducer GND Pin 3 of 3 VDC Com Pressure transducer Supply Voltage Pin 1 Liquid Pressure Out... -
Page 35: System Operation And Service
System Operation and Service 7-SEGMENT ALERT AND SYSTEM STATUS CODES • Disconnecting R wire from the outdoor control R termi- nal. Alert codes are displayed using the 7-segment display lo- cated on the outdoor control. • Turning the indoor unit off and back on again NOTE - System fault and lockout codes take precedence After power up, all currently displayed codes are cleared. - Page 36 TABLE 7. Outdoor Control 7-Segment Display Alert Codes and Inverter LED Flash Codes NOTE – System fault and lockout codes take precedence over system status codes (cooling, heating operating percentages or defrost/dehumidifi- cation). Only the latest active fault or lockout codes are displayed (if present). If no fault or lockout codes are active, then system status codes are displayed.
- Page 37 TABLE 7. Outdoor Control 7-Segment Display Alert Codes and Inverter LED Flash Codes NOTE – System fault and lockout codes take precedence over system status codes (cooling, heating operating percentages or defrost/dehumidifi- cation). Only the latest active fault or lockout codes are displayed (if present). If no fault or lockout codes are active, then system status codes are displayed.
- Page 38 TABLE 7. Outdoor Control 7-Segment Display Alert Codes and Inverter LED Flash Codes NOTE – System fault and lockout codes take precedence over system status codes (cooling, heating operating percentages or defrost/dehumidifi- cation). Only the latest active fault or lockout codes are displayed (if present). If no fault or lockout codes are active, then system status codes are displayed.
- Page 39 TABLE 7. Outdoor Control 7-Segment Display Alert Codes and Inverter LED Flash Codes NOTE – System fault and lockout codes take precedence over system status codes (cooling, heating operating percentages or defrost/dehumidifi- cation). Only the latest active fault or lockout codes are displayed (if present). If no fault or lockout codes are active, then system status codes are displayed.
- Page 40 TABLE 7. Outdoor Control 7-Segment Display Alert Codes and Inverter LED Flash Codes NOTE – System fault and lockout codes take precedence over system status codes (cooling, heating operating percentages or defrost/dehumidifi- cation). Only the latest active fault or lockout codes are displayed (if present). If no fault or lockout codes are active, then system status codes are displayed.
- Page 41 POWER-UP / RESET: 7-SEGMENT POWER-UP DISPLAY STRING FIRMWARE VERSION: During initial power-up or reset, the first item displayed is the outdoor control firmware version. Example to the right shows firmware version 2.3. UNIT TYPE: The next item displayed is the self discovery unit type.
- Page 42 TABLE 8. Outdoor Control 7-Segment Unit Status Displays Description Example of Display Idle Mode: Decimal point flashes at 1 Hz (0.5 second on, 0.5 second off). Idle Mode: Decimal point flashes at 1 Hz. Display OFF. Soft Disable Mode: Top and bottom horizontal line and decimal point flash at 1 Hz. If indoor or outdoor control displays Soft Disable code: 1) Confirm proper wiring between all devices (thermostat, indoor and outdoor).
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Page 43: Unit Selection Code For Outdoor Control
PUSH − BUTTON OPERATION Outdoor control must be in IDLE mode (no heating or Allows cooling operation). call modes. NOTE - See table 7 for explanation of codes. Push and hold button until mode ment display until DASH ment display ( , , lease the button. - Page 44 Error Code Recall Mode (NOTE – control must be in idle mode) To enter error code recall mode, push and hold button until solid E appears, then release button. Control displays up to 10 error codes stored in memory. If E 0 0 0 0 is displayed, there are no stored error codes. ≡...
- Page 45 TABLE 9. Field Test, Diagnostic Recall and Program Menu Options Display Display and action (normal operation) No Change - idle (*) No Change - idle (*) Solid . Enter or exit field test and program mode. Solid A Puts unit in diagnostic mode. (Displays ambient temperatures and any active error codes.) Solid c Clears error history (**) Solid E...
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Page 46: Configuring Unit
Configuring Unit When installing a replacement outdoor control, the unit selection code may have to be manually assigned using the 7-seg- ment display and push button on the control. The unit code sets unit type, capacity and outdoor fan profile. Configuring Unit Selection Code Power-up - Unit selection code (two-digit number) displayed represents unit size code (outdoor unit capacity). -
Page 47: Reconfiguring Outdoor Control Using S30/ S40 Thermostat
• Compressor shift delay timer status Reconfiguring Outdoor Control using S30/ • High pressure switch status S40 Thermostat • Suction pressure Reconfiguring only applies to EL23XCV units installed as • Compressor top cap switch status a fully communicating system with an S30/S40 thermostat and communicating indoor unit. -
Page 48: Maintenance
1 - Clean or change filters. 4 - Check all wiring for loose connections. 2 - Lennox blower motors are factory-lubricated and permanently sealed. No more lubrication is needed. 5 - Check for correct voltage at unit (unit operating). -
Page 49: Unit Wiring Diagrams
LIQ T 1 2 3 4 NOTE- A188 IF ANY WIRE IN THIS APPLIANCE IS REPLACED,IT COOLING MUST BE REPLACED WITH WIRE OF LIKE SIZE, LENNOX RATING, INSULATION THICKNESS, AND TERMINATION. CONDENSING RT13 EL23XCV BLDC LOW PRESSURE TRANSDUCER FAN MOTOR... -
Page 50: Unit Sequence Of Operation
Unit Sequence of Operation The following figures illustrate the overall unit sequence of operation along with the operation of various pressure switches and temperature sensors. The figures also illustrate the use of the compressor anti-short-cycle function in relation to unit Status, unit Fault and lockout LED Codes and unit system operation interactions. - Page 51 SUCTION Y1 DEMAND *SUCTION PRESSURE OR COOLING PRESSURE ABOVE CUT-OUT IS CONTACTOR DEMAND CUT-OUT OF ENERGIZED IGNORED FOR 40 PSIG 90 SECONDS SUCTION PRESSURE SUCTION PRESSURE CUT-OUT IS BYPASSED IF OUTDOOR ABOVE CUT-OUT AMBIENT TEMPERATURE IS 15ºF OF 40 PSIG OR BELOW CONTACTOR DE-ENERGIZED...
- Page 52 HIGH Y1 DEMAND TOP CAP PRESSURE CONTACTOR OR COOLING CLOSED CLOSED SWITCH (S173) SWITCH (S4) ENERGIZED DEMAND HIGH PRESSURE CLOSED OPEN SWITCH (S4) CONTACTOR DE-ENERGIZED The thermostat terminates demand when the contactor is de-energized. If demand is satisfied when alarm is not active, the OPEN 5-strike counter resets.
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Page 53: Component Testing
Component Testing Component Testing Table of Contents Verifying High Pressure Switch and Low Pressure Protec- Liquid Line Filter Drier ............64 tion Operation ..............53 Top Cap Switch Operation ..........64 Verifying Suction Pressure Transducer Operation..54 Reactor Operations ............65 Compressor Operation, Checkout and Status / Error Outdoor Fan Operation...........65 Codes ................58 Outdoor Control Operation .......... -
Page 54: Verifying Suction Pressure Transducer Operation
Verifying Suction Pressure Transducer Operation Using a multimeter set to VDC with the Suction Pressure Transducer connected to the "Suct P" 3-pin connector on the control board. Pin 1 (Red wire +5VDC) to Pin 3 (Black wire - GND) should read 5 VDC continuous. Pin 2 (Blue wire output from transducer) to Pin 3 (Black - GND) should read 0.5 to 4.5 VDC and will vary depending on suction pressure mea- sured. - Page 55 Verifying Liquid Pressure Transducer Operation Using a multimeter set to VDC with the Liquid Pressure Transducer connected to the "Liq P" 3-pin connector on the control board. Pin 1 (Red wire +5VDC) to Pin 3 (Black wire - GND) should read 5 VDC continuous. Pin 2 (Blue wire output from transducer) to Pin 3 (Black - GND) should read 0.5 to 4.5 VDC and will vary depending on liquid~ pressure measured.
- Page 56 SUCTION *SUCTION Y1 DEMAND PRESSURE OR COOLING PRESSURE ABOVE CUT-OUT IS CONTACTOR DEMAND CUT-OUT OF IGNORED FOR ENERGIZED 40 PSIG 90 SECONDS SUCTION PRESSURE SUCTION PRESSURE CUT-OUT IS BYPASSED IF OUTDOOR ABOVE CUT-OUT AMBIENT TEMPERATURE IS 15ºF OF 40 PSIG OR BELOW CONTACTOR DE-ENERGIZED...
- Page 57 HIGH TOP CAP CONTACTOR PRESSURE CLOSED CLOSED Y1 DEMAND SWITCH (S173) ENERGIZED SWITCH (S4) HIGH PRESSURE CLOSED OPEN SWITCH (S4) CONTACTOR DE-ENERGIZED 1. The thermostat will terminate demand when the contactor is de-energized. If demand is satisfied when alarm is not active, the 5-strike counter will reset.
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Page 58: Compressor Operation, Checkout And Status / Error Codes
High Pressure Switch Protection Errors TABLE 12. Outdoor Control 7-Segment Display Alert Codes System fault and lockout codes take precedence over system status codes (cooling, heating operating percentages or defrost/dehu- midification). Only the latest active fault or lockout codes are displayed (if present). If no fault or lockout codes are active, then system status codes are displayed. - Page 59 IMPORTANT: If compressor replacement is required, remove the compressor through the top of the unit. Removal through the access panel is not possible. ELECTRICAL CONNECTION PLUG LOCATION TOP CAP SUCTION COMPRESSOR (NOT THERMOSTAT MOTOR SHOWN) (S173) DISCHARGE COMPRESSOR ACCUMULATOR EQUALIZATION VALVE ROTARY COMPRESSION...
- Page 60 STATUS CODES: When the compressor is running, the 7-segment display will show the compressor capacity. When the EL23XCV unit is in- stalled with a conventional 24VAC non-communicating thermostat the display will show C 1 or C 2. When the EL23XCV unit is installed with an S30/S40 communicating thermostat the display will show the demand as a precentage.
- Page 61 TABLE 13. Outdoor Control 7-Segment Display Alert Codes - Compressor System fault and lockout codes take precedence over system status codes (cooling, heating operating percentages or defrost/dehumidification). Only the latest active fault or lockout codes are displayed (if present). If no fault or lockout codes are active, then system status codes are displayed. Alert codes are also displayed on the S30/S40 thermostat on systems installed with the S30/S40 thermostat.
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Page 62: Crankcase Heater, Checkout And Status / Error Codes
Crankcase Heater, Checkout and Status / Error Codes OPERATION: CRANKCASE HEATER (HR1) Compressors in all units are equipped with a 40 watt belly-band type crankcase heater. The heater prevents liquid from accumulating in the compressor. The heater is controlled by the crankcase heater thermostat. CRANKCASE HEATER THERMOSTAT (S40) Crankcase heater thermostat S40 controls the crankcase heater in all units and is located on the liquid line (see figure 2 for location). -
Page 63: Compressor Sound Cover
FIGURE 35. Checking Crankcase Heater Thermostat STATUS CODE: None ERROR CODES: None Compressor Sound Cover All units come with a soft-sided polyethylene molded outer shell compressor sound cover. The cover helps reduce any unwanted operating sounds from the compressor. The cover features a hook/loop closure system for ease of installation on the compressor. -
Page 64: Liquid Line Filter Drier
Liquid Line Filter Drier (EL23XCV-060 Scroll compressor model only) The EL23XCV-060 has a scroll compressor and a liquid line filter drier that is factory-installed in the liquid line. The filter drier is designed to remove moisture and foreign matter, which can lead to compressor failure. FIGURE 38. -
Page 65: Reactor Operations
ERROR: TABLE 14. Outdoor Control 7-Segment Display Alert Codes - Top Cap Switch NOTE - System fault and lockout codes take precedence over system status codes (cooling, heating operating percentages or de- frost/dehumidification). Only the latest active fault or lockout codes are displayed (if present). If no fault or lockout codes are active, then system status codes are displayed. - Page 66 LIQ T 1 2 3 4 NOTE- A188 IF ANY WIRE IN THIS APPLIANCE IS REPLACED,IT COOLING MUST BE REPLACED WITH WIRE OF LIKE SIZE, LENNOX RATING, INSULATION THICKNESS, AND TERMINATION. CONDENSING RT13 EL23XCV BLDC LOW PRESSURE TRANSDUCER FAN MOTOR...
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Page 67: Outdoor Control Operation
Outdoor Control Operation, Checkout and Status / Error Codes OPERATION: The outdoor control is a microprocessor-based device for use with variable-capacity compressors up to 5-tons in capacity operating on 24VAC residential power. The outdoor control integrates the functionality of maintaining compressor speed, and outdoor fan control of PSC and ECM motors. -
Page 68: 6-Pin Sensor Harness (Dis, Amb, Coil)
ERROR CODES: TABLE 16. Outdoor Control 7-Segment Display Alert Codes - Outdoor Control Errors NOTE - System fault and lockout codes take precedence over system status codes (cooling, heating operating percentages or defrost/dehumidifi- cation). Only the latest active fault or lockout codes are displayed (if present). If no fault or lockout codes are active, then system status codes are displayed. - Page 69 PIN# / WIRE RESISTANCE VALUES TEMP RANGE ºF SENSOR SLEEVE COLOR RANGE (OHMS) (ºC) NONE 10K Ohms Nominal 6 AND 5 336,000 to 2,487 (see table -40 (-40) TO OUTDOOR 4 AND 3 16 on page 74 for exact 140 (60) AMBIENT (BLACK) temperature to ohm readings)
- Page 70 TABLE 17. Ambient and Liquid Line Sensors Temperature / Resistance Range Resistance Resistance Resistance Resistance enheit enheit enheit enheit 136.3 2680 56.8 16657 21.6 44154 -11.3 123152 133.1 2859 56.0 16973 21.0 44851 -11.9 125787 130.1 3040 55.3 17293 20.5 45560 -12.6 128508...
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Page 71: Dc Inverter Control Operation
ERROR CODES: TABLE 18. Outdoor Control 7-Segment Display Alert Codes – Outdoor Control Errors NOTE - System fault and lockout codes take precedence over system status codes (cooling, heating operating percentages or defrost/dehumidification). Only the latest active fault or lockout codes are displayed (if present). If no fault or lockout codes are active, then system status codes are displayed. Alert codes are also displayed on the S30/S40 thermostat. - Page 72 ERROR CODES: TABLE 20. Outdoor Control 7-Segment Display Alert Codes and Inverter LED Flash Codes NOTE - System fault and lockout codes take precedence over system status codes (cooling, heating operating percentages or defrost/dehumidifi- cation). Only the latest active fault or lockout codes are displayed (if present). If no fault or lockout codes are active, then system status codes are displayed.
- Page 73 TABLE 20. Outdoor Control 7-Segment Display Alert Codes and Inverter LED Flash Codes NOTE - System fault and lockout codes take precedence over system status codes (cooling, heating operating percentages or defrost/dehumidifi- cation). Only the latest active fault or lockout codes are displayed (if present). If no fault or lockout codes are active, then system status codes are displayed.
- Page 74 TABLE 20. Outdoor Control 7-Segment Display Alert Codes and Inverter LED Flash Codes NOTE - System fault and lockout codes take precedence over system status codes (cooling, heating operating percentages or defrost/dehumidifi- cation). Only the latest active fault or lockout codes are displayed (if present). If no fault or lockout codes are active, then system status codes are displayed.
- Page 75 TABLE 20. Outdoor Control 7-Segment Display Alert Codes and Inverter LED Flash Codes NOTE - System fault and lockout codes take precedence over system status codes (cooling, heating operating percentages or defrost/dehumidifi- cation). Only the latest active fault or lockout codes are displayed (if present). If no fault or lockout codes are active, then system status codes are displayed.
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Page 76: System Refrigerant
TABLE 20. Outdoor Control 7-Segment Display Alert Codes and Inverter LED Flash Codes NOTE - System fault and lockout codes take precedence over system status codes (cooling, heating operating percentages or defrost/dehumidifi- cation). Only the latest active fault or lockout codes are displayed (if present). If no fault or lockout codes are active, then system status codes are displayed. - Page 77 EL23XCV Charge Mode Operation with a S30 iComfort EL23XCV Charge Mode Operation with a Convention- Communicating Thermostat al 24VAC Non-Communicating Thermostat Installing a jumper on the Charge Mode Pins will initiate On applications with a conventional 24VAC non-commu- compressor operation and outdoor fan motor at 100% ca- nicating thermostat, the charge mode jumper must be in- pacity and will provide a signal to the indoor unit to initiate stalled on the Charge Mode Pins after providing a Y1 cool-...
- Page 78 AIRFLOW TEMPERATURE OF AIR 80 24 24 24 23 23 22 22 22 20 19 18 17 16 15 INDOOR COIL ENTERING INDOOR COIL ºF 78 23 23 23 22 22 21 21 20 19 18 17 16 15 14 76 22 22 22 21 21 20 19 19 18 17 16 15 14 13 74 21 21 21 20 19 19 18 17 16 16 15 14 13 12 72 20 20 19 18 17 17 16 15 15 14 13 12 11 10...
- Page 79 SUBCOOLING (All charging MUST be performed while system is operating CHARGING METHOD either at maximum speed or 100% demand.) 1. THE DIAGNOSTIC SCREEN ON THE THERMOSTAT OR OUTDOOR CONTROL 7-SEGMENT DISPLAY WILL SHOW INDOOR AND OUTDOOR MOTOR CFMS OR RPMS. 2.
- Page 80 FIGURE 50. EL23XCV Charging Label Charging Temperatures and Pressures – High Speed Only EL23XCV Unit -024 -036 -048 -060 Table 1 – Subcooling Values (High Capacity) Saturation Temperature minus Liquid Temperature °F (°C) ± 1°F (0.5°C) Temp. °F (°C) 12 (6.7) 6 (3.3) 10 (5.6) 10 (5.6)