Lennox XC25-024-230-01 Installation And Service Procedure
  1. Manuals
  2. Brands
  3. Lennox Manuals
  4. Air Conditioner
  5. XC25-024-230-01
  6. Installation and service procedure

Lennox XC25-024-230-01 Installation And Service Procedure

Xc25 series
Hide thumbs
Table of Contents

Advertisement

Quick Links

Service Literature
Dave Lennox Signature
IMPORTANT
XC25 units have refrigerant piping requirements that are unique to
this unit. Size and install the refrigerant piping per table 2 (page 14)
to ensure proper unit operation.
IMPORTANT:
Before applying any power (main, solar or low voltage) to the
outdoor unit, confirm the iComfort Wi-Fi ® thermostat has
software Version 2.1 or higher installed. (Reference the iComfort
Wi-Fi ® thermostat manual.)
This unit is an integral component of a system that requires an
®
iComfort Wi-Fi
thermostat and iComfort
or furnace.
XC25
WARNING
Improper
installation,
adjustment,
maintenance can cause personal injury, loss of life, or damage to
property. Installation and service must be performed by a licensed
professional installer (or equivalent) or a service agency.
WARNING
Electrical components may hold charge. Do
not remove this panel or service this area for
5 minutes after the power has been removed.
INSTALLATION AND SERVICE
PROCEDURE
™
-enabled air handler
®
iComfort Wi-Fi
™
iComfort
-enabled
air handler or
furnace
alteration,
service
Electrical Hazard
High Voltage
Wait 5 Minutes
Corp. 1253-L11
July 24, 2013
®
Collection XC25 Series Units

TABLE OF CONTENTS

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Outdoor Control Push-Button Operation
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
®
SunSource
Home Energy System
or
The Clean Air Act of 1990 bans the intentional venting of
refrigerant (CFCs, HCFCs AND HFCs) as of July 1, 1992.
Approved methods of recovery, recycling or reclaiming
must be followed. Fines and/or incarceration may be
levied for noncompliance.
1
. . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
IMPORTANT
2013 Lennox Industries Inc.
XC25
2
2
2
3
4
5
7
7
9
12
13
16
19
21
21
24
. . . . . . . . . .
29
29
. . . . . . .
30
. . . . . . . . . .
35
39
®
40
40
41
41
42
45
47
50
69

Advertisement

Table of Contents
loading

Related Manuals for Lennox XC25-024-230-01

Summary of Contents for Lennox XC25-024-230-01

  • Page 1: Table Of Contents

    Approved methods of recovery, recycling or reclaiming Electrical components may hold charge. Do must be followed. Fines and/or incarceration may be not remove this panel or service this area for levied for noncompliance. 5 minutes after the power has been removed. 2013 Lennox Industries Inc.

  • Page 2: Overview

    Outdoor Fan Model Number Sound Rating Number (dB) Factory Refrigerant Number of Blades Diameter - inches. Charge Maximum Minimum XC25-024-230-01 13 lbs, 10 oz Unit Outdoor Fan Model Number Sound Rating Number (dB) Factory Refrigerant Number of Blades Diameter - inches.

  • Page 3: Electrical Data

    Model Number Load Rotor Motor Load Circuity current Amps Amps Amps Ampacity Protection (RLA) (LRA) (FLA) (amps) XC25-024-230-01 14.9 10.30 18.0 3020 1950 208/230V-60 Hz-1 Ph Unit Compressor Outdoor Fan (RPM varies with compressor RPM) Maximum Rated Locked Full WATTS Over-...

  • Page 4: Unit Dimensions

    Electric Shock Hazard. Can cause injury or death. Unit This unit must be matched with an indoor coil as must be grounded in accordance with national and local specified in Lennox Product Specification bulletin. codes. Coils previously charged with HCFC-22 must be Line voltage is present at all components when unit is not flushed.

  • Page 5: Typical Unit Parts Arrangement

    Typical Unit Parts Arrangement CONTROL PANEL FOR XC25-024 AND -036 CONTACTOR-SPST (25FLA/35RES) GROUND LUGS INVERTER REACTOR, 230V, 4KW DC INVERTER CONTROL OUTDOOR CONTROL CONTROL PANEL FOR XC25-048 AND -060 INVERTER NOISE FILTER FOR 6KW INVERTER (208/240V, 60HZ, CURRENT RANGE 30A MAXIMUM, INDUCTANCE 4.3MH) GROUND LUGS...
  • Page 6 This unit must be matched with an indoor coil as applying excessive force or rapid motion can result in specified in Lennox Product Specification bulletin. personal injury. Be aware of, and use caution when Coils previously charged with HCFC-22 must be working nearby these areas during installation or while flushed.

  • Page 7: Operating Service Valves

    When checking the system charge, only use a manifold gauge set that features low loss anti-blow back fittings. See the Lennox Service and Application Notes #C-08-1 for further details and information. Manifold gauge set used with HFC-410A refrigerant sys­...

  • Page 8: Service Valves

    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.

  • Page 9: Ii. Installation

    II. INSTALLATION PLACING UNIT ON SLAB Unit Placement When installing unit at grade level, the top of the slab should be high enough above grade so that water from higher ground will not collect around the unit. The slab CAUTION should have a slope tolerance as described in figure 5, de­...
  • Page 10 STABILIZING UNIT ON UNEVEN SURFACES ROOF MOUNTING IMPORTANT Locate the unit above a load-bearing wall or area of the roof that can adequately support the unit. Consult local codes for rooftop applications. Unit Stabilizer Bracket Use (field-provided): Always use stabilizers when unit is raised above the factory height.
  • Page 11 DETAIL A DETAIL B INSTALL UNIT AWAY FROM WINDOWS 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. BUILDING STRUCTURE MOUNTING SLAB TWO 90°...

  • Page 12: Removing And Installing Panels

    Removing and Installing Panels ACCESS PANEL REMOVAL PANELS REMOVE AND INSTALL THE ACCESS PANEL AS ILLUSTRATED. ACCESS AND LOUVERED REMOVE 4 SCREWS TO WARNING REMOVE PANEL FOR ACCESSING COMPRESSOR To prevent personal injury, or damage to panels, unit or structure, be AND CONTROLS.

  • Page 13: New Or Replacement Line Set

    Take care to empty all existing traps. Polyol ester not being installed then proceed to Brazing Connections on (POE) oils are used in Lennox units charged with page 16. HFC-410A refrigerant. Residual mineral oil can act as an insulator, preventing proper heat transfer.
  • Page 14 COOLING SYSTEM (HFC­410A) stalled. No additional components required. Vertical vapor riser must be sized to the vapor riser listed in Total equivalent length equals 180 feet (all piping and table 3 on systems with line sets longer than 51 feet. fittings included).
  • Page 15 LINE SET IMPORTANT - Refrigerant lines must not contact structure. REFRIGERANT LINE SET — INSTALLING INSTALLATION VERTICAL RUNS (NEW CONSTRUCTION SHOWN) LINE SET ISOLATION — THE FOLLOWING ILLUSTRATIONS ARE EXAM­ NOTE - INSULATE LIQUID LINE WHEN IT IS ROUTED THROUGH AREAS PLES OF PROPER REFRIGERANT LINE SET ISOLATION: WHERE THE SURROUNDING AMBIENT TEMPERATURE COULD BECOME HIGHER THAN THE TEMPERATURE OF THE LIQUID LINE OR WHEN...

  • Page 16: Brazing Connections

    Brazing Connections IMPORTANT Use the procedures outlined in figures 8 and 9 for brazing line set connections to service valves. Allow braze joint to cool before removing the wet rag from the service valve. Temperatures above 250ºF can WARNING damage valve seals. WARNING Danger of fire.
  • Page 17 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 18 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 WARNING Flow regulated nitrogen (at 1 to 2 psig) through the refrigeration gauge set into the valve stem port connection 1.

  • Page 19: Flushing The System

    Flushing the System LINE SET AND INDOOR COIL (1 OF 2) TYPICAL EXISTING EXPANSION VALVE REMOVAL PROCEDURE (UNCASED COIL SHOWN) STUB END TWO PIECE PATCH PLATE LIQUID LINE CHECK TYPICAL EXISTING FIXED ORIFICE (UNCASED COIL ONLY) ORIFICE EXPANSION REMOVAL PROCEDURE (UNCASED COIL HOUSING VALVE DISTRIBUTOR...
  • Page 20 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 LENNOX XC25 PRODUCT SPECIFICATIONS FOR APPROVED EXPANSION VALVE KIT MATCH-UPS AND APPLICATION INFORMATION.

  • Page 21: Leak Testing The System

    Take care to PIPING PANEL SUCTION LINE empty all existing traps. Polyol ester (POE) oils are used in Lennox units charged with HFC-410A refrigerant. Residual mineral oil can act as an insulator, preventing proper heat transfer. It can also clog the expansion...
  • Page 22 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.

  • Page 23: Evacuating The System

    Evacuating the System LINE SET AND INDOOR COIL MANIFOLD GAUGE SET 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 A34000 1/4 SAE TEE WITH GAUGE SET TO LIQUID LINE SERVICE...

  • Page 24: Electrical

    Load Shedding IMPORTANT Use a thermocouple or thermistor electronic vacuum Utility Load Shedding Mode ACTIVATED gauge that is calibrated in microns. Use an instrument (Utility Cycled Unit OFF) – The normally closed set of capable of accurately measuring down to 50 microns. contacts in the utility load shedding control receiver OPEN.
  • Page 25 ROUTE CONTROL WIRES ELECTRICAL (CONTROL WIRING) AND LINE SET INLETS USE TYPICAL CONTROL BOX Maximum length of wiring (18 gauge) for all connections on BUSHING AND GROMMETS PROVIDED IN BAG the RSBus is 1500 feet (457 meters). Wires should be col­ º...
  • Page 26 CAUTION Electrostatic discharge can affect electronic components. Take precautions during unit installation and service to protect the unit's electronic controls. ELECTROSTATIC DISCHARGE Precautions will help to avoid control exposure to electrostatic discharge by (ESD) putting the unit, the control and the technician at the same electrostatic potential. Precautions and Procedures Neutralize electrostatic charge by touching hand and all tools on an unpainted unit surface before performing any service procedure.
  • Page 27 Data Data 24VAC nominal board main 24VAC nominal power input. power input. OEM test 26Vdc transistor output to Lennox factory OEM TOUT tester OEM test pin. In each terminal box: 24VAC nominal 17ma @ P2 ­ Terminal 1 ­ TEST 30VAC P2 ­...
  • Page 28 Table 5 continued. Outdoor Control Terminal Designations and Input /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...

  • Page 29: Servicing Unit Delivered Void Of Charge

    1. Rotate fan to check for binding. Servicing Units Delivered Void of Charge If the outdoor unit is void of refrigerant, clean the system us­ 2. Inspect all factory- and field-installed wiring for loose ing the procedure described below. connections. 1.

  • Page 30: Iii. System Operation And Service

    III. SYSTEM OPERATION AND SERVICE • Disconnecting R wire from the outdoor control R 7-Segment Alert and System Status Codes terminal. Alert codes are displayed using the 7-segment display loc­ ated 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 over system status codes (cooling, heating operating per­...
  • Page 31 Table 6 continued Inverter LED Flash Code (number of Alert Inverter Alarm Description Possible Causes and Clearing Alarm Priority flashes) Codes Code Red LED Green LED The O relay on the air- handler or outdoor unit O relay / Sage 1 failed. Pilot relay contacts did not close or the relay has failed.
  • Page 32 Table 6 continued Inverter Flash Code (number Alert Inverter Priority Alarm Description Possible Causes and Clearing Alarm flashes) Code Codes Red LED Green LED Outdoor control has increased minimum Outdoor ambient temperature is below system limit. Control at­ compressor speed tempts to run at lowest allowed compressor speed to allow for E 425 Minor...
  • Page 33 Table 6 continued Inverter LED Flash Code (number of Alert Inverter Priority Alarm Description Possible Causes and Clearing Alarm flashes) Code Codes Red LED Green LED When this error occurs, the outdoor control cycles power to the inverter by opening the contactor for 2 minutes. Moderate / Inverter internal er­...
  • Page 34 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 35 Table 6 continued Description Example of Display E 2 5 0 E 2 3 1 E 2 5 0 If first error is , second pause pause Diagnostic recall: Shows the last 10 stored diagnostic error E 2 3 1 codes.

  • Page 36: Diagnostic Mode

    Idle mode — System is energized with no demand — Decimal flashes at 1 Hertz > 0.5 second ON, 0.5 second OFF. Display Symbol or Display Fan Test and Display String Option Character Displayed Display string shows outdoor control firmware version 1 _ 6 > pause> A C or H P unit >pause>unit capacity in BTUs>pause >unit code. If 3 during start-up horizontal bars are displayed during any sequence of this display string, it indicates that the specific parameter is not configured.
  • Page 37 6. Monitor the low-side pressure at the outdoor unit. The internal vacuum protection in the compressor and/or one of the pressure switches prevents full recovery of the refrigerant into the outdoor unit. When the system reaches this condition, the suction line service valve PUMP DOWN PUMP DOWN should be shut off and the Pump Down Jumper...
  • Page 38 How to enable liquid line temperature information on a 7-segment display NOTE - If system power is recycled, display string reverts back to Both coil and liquid line temperatures can be enabled for display default. Repeat the procedure which enables the outdoor coil and either during normal demand operation or while in idle mode.

  • Page 39: 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 RPM. Configuring Unit Selection Code Power-up - Unit selection code (two-digit number) displayed represents unit size code (outdoor unit capacity).

  • Page 40: Reconfiguring Outdoor Control Using Icomfort Wi-Fi Thermostat

    Compressor anti-short cycle delay timer status Reconfiguring Outdoor Control using ® Cooling rate iComfort Wi-Fi Thermostat Compressor shift delay timer status If any component of the HVAC system is changed, e.g. re­ High pressure switch status placing an outdoor sensor, reconfiguring the system is Low pressure switch status required.

  • Page 41: Maintenance

    Indoor Unit 1. Clean or change filters. 2. Lennox blower motors are pre-lubricated and perman­ ently sealed. No more lubrication is needed. ® This Dave Lennox Signature Collection air conditioner is 3.

  • Page 42: Unit Wiring Diagrams

    Unit Wiring Diagrams The following wiring diagrams were used during various stages of unit production. Service technician will need to visually inspect the unit being serviced to determine which wiring diagram is applicable. Quick verification can usually be made by comparing the wiring diagram located on the unit access panel to the following diagrams.
  • Page 43 Figure 24. Typical Unit Wiring (XC25-048 and -060) XC25...
  • Page 44 NOTE - For more information on Load Shedding, see Electrical on page 24. Figure 25. Load Shedding Feature Wiring Diagram XC25...

  • Page 45: Factory Wiring Diagrams

    Factory Wiring Diagrams Figure 26. Typical Factory Wiring (XC25-024 and -036) XC25...
  • Page 46 Figure 27. Typical Factory Wiring (XC25-048 and -060) XC25...

  • Page 47: Unit Sequence Of Operations

    Unit Sequence of Operation The following figures illustrated the overall unit sequence of operation along with the operation of various pressure switches and temperature sensors. The figures also illustration the use of the compressor anti-short cycle function in relations to unit Status, Fault and lock out LED Codes system operations interaction.
  • Page 48 INITIAL TRIP PRESSURE SWITCH IS CONTACTOR CLOSED Y1 DEMAND SWITCH (S87) IGNORED FOR ENERGIZED 90 SECONDS PRESSURE SWITCH IS CLOSED OR OUTDOOR CLOSED OPEN AMBIENT TEMPERATURE IS 15ºF SWITCH (S87) OR BELOW CONTACTOR DE-ENERGIZED The thermostat terminates demand when the contactor is de-energized.
  • Page 49 HIGH TOP CAP PRESSURE CONTACTOR CLOSED Y1 DEMAND CLOSED SWITCH (S173) SWITCH (S4) ENERGIZED 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.

  • Page 50: Component Testing

    Component Testing Component Testing Table of Contents Verifying High Pressure and Low Pressure Switch Oper­ Line Filter (Electromagnetic Compatibility Circuit - EMC) ation ......... Operations, Checkout and Status / Error Codes .
  • Page 51 INITIAL TRIP PRESSURE CONTACTOR SWITCH IS Y1 DEMAND CLOSED SWITCH (S87) ENERGIZED IGNORED FOR 90 SECONDS SWITCH IS CLOSED OR OUTDOOR PRESSURE CLOSED OPEN AMBIENT TEMPERATURE IS 15ºF SWITCH (S87) OR BELOW CONTACTOR 1. The thermostat will terminate demand when the contactor is DE-ENERGIZED de-energized.
  • Page 52 HIGH TOP CAP CONTACTOR PRESSURE CLOSED Y1 DEMAND CLOSED 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.

  • Page 53: Compressor Operation, Checkout And Status / Error Codes

    High and Low Pressure Switch Errors Table 10. Outdoor Control 7-Segment Display Alert Codes - High and Low Pressure Switches 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 ®...
  • Page 54 STATUS CODES: When the compressor is running, the 7­segment display on the outdoor control sends the current compressor demand (as a percentage) to the room thermostat. (Example: C 5 0 – compressor is running at 50% of maximum speed.) Figure 35. Compressor Operation, Checkout and Status/Error Codes ERROR CODES: Table 11.

  • Page 55: Crankcase Heater, Checkout And Status / Error Codes

    Table 11 continued Inverter Flash Code (number Alert Inverter Priority Alarm Description Possible Causes and Clearing Alarm flashes) Code Codes Red LED Green LED Heat sink temperature is approaching limit. The compressor Compressor slow­ speed automatically slows to reduce heat­sink temperature. The down due to high E 440 1 flash...

  • Page 56: Compressor Sound Cover

    Figure 37. Checking Belly-Band Crankcase Heater Crankcase Heater Thermostat: As the detected temperature changes, the resistance across the sensor changes. Table 15 on page 65 shows how the resistance varies as the temperature changes for this sensor. NOTE - When checking the ohms across a sensor, be aware that a sensor showing a resistance value that is not within the range shown in table 15 on page 65, may be performing as designed.

  • Page 57: Top Cap Switch Operation, Checkout And Status / Error Codes

    Figure 40. Liquid Line Filter Drier Top Cap Switch Operation, Checkout and Status / Error Codes OPERATION: Top Cap Thermal Sensor Switch (S173) Some units are equipped with a compressor-mounted normally closed temperature switch that prevents compressor dam­ age due to overheating caused by internal friction. The switch is located on top of the compressor casing. This switch senses the compressor casing temperature and opens at 239-257°F to shut off compressor operation.

  • Page 58: Reactor Operations, Checkout And Status / Error Codes

    ERROR: Table 12. 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 defrost/dehumidification). Only the latest active fault or lockout codes are displayed (if present). If no fault or lockout codes ®...

  • Page 59: Line Filter (Electromagnetic Compatibility Circuit - Emc) Operations, Checkout And Status / Error Codes

    Line Filter (Electromagnetic Compatibility Circuit - EMC) Operations, Checkout and Status / Error Codes OPERATION: The line filter reduces the unintentional conducted emission from the equipment, to a level sufficient to pass regulatory limits (such as FCC part 15). The filter is rated at 208/230 volt, 30 amp maximum, 60 Hertz. NOTE - The 2- and 3-ton inverters have the EMC built­in.

  • Page 60: Outdoor Fan Operation And Checkout

    Outdoor Fan Operation and Checkout OPERATION: hese units use an integrated control and motor that is programmed for variable-capacity operation. The fan speed is ® controlled by the iComfort Wi-Fi thermostat. CHECKOUT: VAC Voltage Check Check for 208/240 VAC power at inverter contactor (red wires) (see figure 46). With unit operating, check for main VAC to motor and outdoor control VDC output to motor: 1.

  • Page 61: Ferrites

    VDC Voltage Check: Check for VDC out of Fan PWM and COM. VDC output reading is determined by the percentage of room thermostat de­ mand. 1. No voltage present – Remove wires from control and check for VDC. If there is no voltage present, then replace out­ door control.

  • Page 62: Outdoor Control Operation, Checkout And Status / Error Codes

    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, demand, defrost and fan PWM controls.

  • Page 63: Unit Sensor Operations, Checkout And Status / Error Codes

    ERROR CODES: Table 14. 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 ®...
  • Page 64 PIN# / WIRE RESISTANCE VALUES TEMP RANGE ºF SENSOR SLEEVE COLOR RANGE (OHMS) (ºC) NONE 6 AND 5 314669 and 3779 OUTDOOR 336,000 to 2,487 (see 4 AND 3 AMBIENT -40 (-40) TO table 15 on page 65 for (BLACK) 140 (60) exact temperature to 2 AND 1...
  • Page 65 Table 15. Ambient and Liquid Line Sensors Temperature / Resistance Range Degrees Fahr­ Degrees Fahr­ Degrees Fahr­ Degrees Fahr­ 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...

  • Page 66: Error Codes

    ERROR C C O C ODES: 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/dehumidification). Only the latest active fault or lockout codes are displayed (if present). If no fault or lockout codes ®...
  • Page 67 Heat Sink Intelligent Power Module Converter Power Factor Correction Circuit Communication Control Figure 53. 4- and 5-Ton Unit Inverter STATUS CODES: Table 17. 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/dehumidification).
  • Page 68 Table Table 18 continued Inverter LED Flash Code (number of Alert Inverter Priority Alarm Description Possible Causes and Clearing Alarm flashes) Code Codes Red LED Green LED If condition (55A or higher) is detected, outdoor unit will stop (compressor and fan). Anti­short cycle is initiated.

  • Page 69: System Refrigerant

    Emergency 24VAC System Operation The Y terminal located on the outdoor control allows the outdoor unit to be cycled ON and OFF using 24VAC inputs. The outdoor unit will operate at 100% capacity in this configuration. The following wiring diagrams display the wiring changes needed to switch a full communicating system to a non-communic­ ating system with the XC25 running in emergency mode (24VAC inputs to outdoor unit).
  • Page 70 MANIFOLD GAUGE SET GAUGE SET HIGH CONNECTIONS FOR TESTING AND CHARGING TRUE SUCTION PORT CONNECTION OUTDOOR UNIT REFRIGERANT TANK CHARGE IN LIQUID PHASE DIGITAL SCALE INSIDE OUTDOOR UNIT TO LIQUID TEMPERATURE SENSOR LINE SERVICE (LIQUID LINE) VALVE TEMPERATURE SENSOR CLOSE MANIFOLD GAUGE SET VALVES AND CONNECT THE CENTER HOSE TO A CYLINDER OF HFC-410A SET FOR LIQUID PHASE CHARGING. CONNECT THE MANIFOLD GAUGE SET'S LOW PRESSURE SIDE TO THE TRUE SUCTION PORT.
  • Page 71 Use the WEIGH-IN method for adding initial refrigerant charge, and then use SUBCOOLING method for for verifying refrigerant charge. WEIGH-IN CHARGING METHOD NOTE - Insulate liquid line when it is routed through areas where 64ºF (17.7ºC) and Below the surrounding ambient temperature could become higher than Adjust amount for variation in the temperature of the liquid line or when pressure drop is equal line set length and liquid line...
  • Page 72 Figure 59. XC25 Charging Sticker XC25...

This manual is also suitable for:

Xc25-036-230-01Xc25-048-230-01Xc25-060-230-01Signature xc25 seriesSignature xc25-024-230-01Signature xc25-036-230-01 ... Show all

Table of Contents