Allied 4SHP22LX Service Manual
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Allied 4SHP22LX Service Manual

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SERVICE MANUAL
4SHP22LX
This is a safety alert symbol and should never be ignored. When you see this symbol on labels or in manuals, be alert to
the potential for personal injury or death.
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.
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.
508401-01
WARNING
CAUTION

Table of Contents

Technical Specifications ..............................................2
Parts Arrangement.......................................................5
General ........................................................................8
Installation ...................................................................8
Operating Gauge Set.................................................10
New or Replacement Line Set ...................................12
Outdoor Unitary Control.............................................27
Unit Operation ...........................................................29
Defrost Function ........................................................30
Defrost Test ...............................................................30
Start-Up .....................................................................33
System Operation and Service ..................................34
Configuring Unit .........................................................54
System Overview.......................................................55
Defrost Function ........................................................55
Maintenance ..............................................................57
Unit Wiring Diagram ..................................................58
Unit Sequence of Operation ......................................59
Component Testing ....................................................63
System Configuration ................................................81
Cooling Operation Mode Jumper...............................82
Heating Operation Mode Jumper ..............................82
Unit Operation ...........................................................82
Defrost Function ........................................................84
Sensor Harness .........................................................87
System Refrigerant ..................................................101
Charge Mode Jumper ..............................................101
*P508401-01*
Issue 2322
(P) 508401-01
Page 1 of 106

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  • Page 1: Table Of Contents

    SERVICE MANUAL 4SHP22LX This is a safety alert symbol and should never be ignored. When you see this symbol on labels or in manuals, be alert to the potential for personal injury or death. Table of Contents Technical Specifications ..........2 Parts Arrangement............5...

  • Page 2: Technical Specifications

    Technical Specifications MODEL NUMBER GUIDE 4 SHP 22 LX 1 36 P - 51 A REFRIGERANT MINOR REVISION CODE 4 = R410A MAJOR REVISION CODE 1-PHASE, 60 Hz SPLIT HEAT PUMP NOMINAL SEER TONNAGE 24, 36, 48, 60 TIER REGION RESTRICTIONS LX: LOUVERED VARIABLE 1 = STANDARD MODEL CAPACITY W/ COMFORT SYNC...
  • Page 3 1 DTC = Designated tested combination 2 Certified in accordance with Unitary Air Conditioner Certification Program, which is based on AHRI Standard 210/240 3 A blower time delay relay is standard on all Allied Air Enterprises furnace and air handler products NOTE: For the latest AHRI system matches, please visit www.alliedratings.com or www.AHRIdirectory.org...
  • Page 4 ® Comfort Sync Zone Sensor All Models 1.851422 ® Discharge Temperature Sensor All models 88K38 FAN BLADE SPECS Fan Blade 4SHP22LX Dia. #of Blades Pitch Part # 26" 100017-02 36, 48, 60 26" 100017-03 Page 4 of 106 Issue 2322...

  • Page 5: Parts Arrangement

    Parts Arrangement CONTROL PANEL -24, -36 OUTDOOR CONTROL DC INVERTER CONTROL GROUND LUG INVERTER REACTOR CONTACTOR – SPST CONTROL PANEL -48, -60 OUTDOOR CONTROL DC INVERTER CONTROL GROUND LUG INVERTER REACTOR CONTACTOR – SPST Figure 1. Parts Arrangement - Control Panel 508401-01 Issue 2322 Page 5 of 106...
  • Page 6 Figure 2. Component Locations – 4SHP22LX124 and -36 Page 6 of 106 Issue 2322 508401-01...
  • Page 7 Figure 3. Component Locations 4SHP22LX148 and -60 (Scroll Compressor Models) 508401-01 Issue 2322 Page 7 of 106...

  • Page 8: General

    Safety Precautions Follow all safety codes. Wear safety glasses and work WARNING gloves. Use quenching cloth for brazing operations. Have fire extinguisher available. Read these instructions Electric shock hazard. thoroughly and follow all warning or cautions attached to Can cause injury or death. Before attempting the unit.
  • Page 9 Outdoor Section Location Minimum Clearance Zoning ordinances may govern the minimum distance the Service box 30” condensing unit can be installed from the property line. Top of unit* 48” Between units 24” Install on a Solid, Level Mounting Pad The outdoor section is to be installed on a solid foundation. Against wall 6”...

  • Page 10: Operating Gauge Set

    When checking the system charge, only use a manifold gauge set that features low loss anti-blow back fittings. The 4SHP22LX is a high efficiency residential split-system Manifold gauge set used with HFC-410A refrigerant heat pump unit that is approved for use with HFC 410A systems must be capable of handling the higher system refrigerant.
  • Page 11 must be rated for use at up to 800 psig of pressure with a To Open Liquid or Suction Line Service Valve: 4000 psig burst rating. Remove stem cap with an adjustable wrench. Use service wrench with a hex-head extension to back Operating Service Valves the stem out counterclockwise as far as it will go.

  • Page 12: New Or Replacement Line Set

    When using a high pressure gas such care to empty all existing traps. Polyvinyl ether (PVE) as nitrogen to pressurize a refrigeration and polyolester (POE) oils are used in Allied variable- or air conditioning system, use a capacity units charged with HFC-410A refrigerant.
  • Page 13 Heat Pump System (HFC410A) • Up to 50 Linear Feet: Use rated line sizes listed in Table 3. • Total equivalent length equals 180 feet (piping and all fittings included). • Between 51 and 150 Linear Feet: Crankcase heater and nonbleed port TXV factory installed. No additional NOTE: Length is general guide.
  • Page 14 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 —...
  • Page 15 Typical Existing Fixed Orifice Removal 1. On fully cased coils, remove the coil access and plumbing panels. Procedure Remove any shipping clamps from the liquid line and DISTRIBUTOR TUBES distributor assembly. LIQUID LINE ORIFICE HOUSING Disconnect the equalizer line from the fitting on the vapor line.
  • Page 16 Polyvinyl ether (PVE) cause fire and/or an explosion, that could oils are used in Allied variable-capacity units charged result in property damage, personal injury with HFC-410A refrigerant. Residual mineral oil can or death.
  • Page 17 Refrigerant Piping - Install Indoor Expansion Valve This outdoor unit is designed for use in systems that include a heat pump expansion valve metering device at the indoor coil. See the 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.
  • Page 18 Refrigerant Piping - Brazing Procedures CAP AND CORE REMOVAL CUT AND DEBUR Cut ends of the refrigerant lines square (free from nicks or dents) Remove service cap and core from and debur the ends. The pipe must remain round. Do not crimp end both the vapor and liquid line service of the line.
  • 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 vapor valve stem port.
  • Page 20 Leak Test and Evacuation Evacuating the system of non-condensables is critical for proper operation of the unit. Non-condensables are defined as any gas that will not condense under temperatures and pressures present during operation of an air conditioning system. Non-condensables and water suction combine with refrigerant to produce substances that corrode copper piping and compressor parts.
  • Page 21 EVACUATION HIGH CONNECT GAUGE SET NOTE - Remove cores from service valves (if not already done). A - Connect low side of manifold gauge set with 1/4 SAE in-line tee to vapor line service valve B - Connect high side of manifold gauge set to OUTDOOR MANIFOLD liquid line service valve...

  • Page 22: Electrical - Circuit Sizing And Wire Routing

    Wi- opening access panel. Unit may have Fi accessibility and system operation parameters. Refer to multiple power supplies. the 4SHP22LX field wiring diagram for a Comfort Sync A3 communicating thermostat. Conventional 24VAC Non-Communicating Thermostat WARNING...
  • Page 23 (Jumper Y1 to Y2) Thermostat (non- communicating) Control Using Suction Pressure communicating) Table 6. 4SHP22LX Thermostat Control Options Size Circuit and Install Service Disconnect Install Thermostat Switch Install room thermostat (ordered separately) on an inside wall approximately in the center of the conditioned area Refer to the unit nameplate for minimum circuit ampacity, and 5 feet (1.5m) from the floor.
  • Page 24 Connect the 208/230 high voltage power supply from the installed grommet installed in electrical inlet. disconnect to the 4SHP22LX contactor as shown. Connect the ground wire from the power supply to the unit ground Conventional 24VAC Non-Communicating Thermostat lug connection.
  • Page 25 PROVIDED RAST 6-PIN CONNECTOR INDOOR CONTROL Indoor Control Single Wire To C Terminal Single Wire To C Terminal Unused Wires Unused Wires Figure 14. 4SHP22LX with Comfort Sync A3 Communicating Thermostat – Field Wiring 508401-01 Issue 2322 Page 25 of 106...
  • Page 26 O.D. SENSOR OPTIONAL O.D. SENSOR OPTIONAL ACC2 ACC1 ACC2 RAST 6-PIN ACC1 CONNECTOR RAST 6-PIN CONNECTOR RAST 6-PIN CONNECTOR RAST 6-PIN CONNECTOR VARIABLE CAPACITY TWO STAGE / CONVENTIONAL 24VAC OUTDOOR UNIT VARIABLE SPEED NON-COMMUNICATING GAS FURNACE THERMOSTAT VARIABLE CAPACITY TWO STAGE / CONVENTIONAL 24VAC FOR SINGLE STAGE OPERATION INSTALL A JUMPER BETWEEN Y1 TO Y2 ON THE OUTDOOR UNIT OUTDOOR UNIT...

  • Page 27: Outdoor Unitary Control

    Charge Mode Pins after providing a To initiate the 4SHP22LX Charge Mode function, install Y1 compressor demand to the 4SHP22LX to initiate the the jumper across the two Charge Mode Pins (CHRG Charge Mode. When using the Charge Mode in the cooling MODE) on the outdoor control.
  • Page 28 Charge Mode Pins after increases the suction pressure setpoint will decrease. providing a cooling compressor demand to the 4SHP22LX When the Cooling Operation Mode jumper is installed in and an “O” cooling reversing valve demand to initiate the the “Normal Mode”...

  • Page 29: Unit Operation

    The 4SHP22LX unit will cycle off once the thermostat demand is satisfied. 4SHP22LX Unit Operation with a Conventional 24VAC Non-Communicating 2-Stage Heat Pump Thermostat – Heating Mode When the 4SHP22LX unit is installed with a conventional...

  • Page 30: Defrost Function

    If the compressor demand remains after 20 a defrost cycle to clear the outdoor coil of frost or ice. The minutes, the 4SHP22LX control will begin to ramp up the 4SHP22LX may be placed into a forced defrost mode by compressor capacity until maximum capacity is achieved.
  • Page 31 P10 (PSC 1/4ʺ QC terminals - Switched output for PSC outdoor fan Switched 230VAC Fan 1/4ʺ control (not used on 4SHP22LX heat pumps) Nominal RAST Connector Terminal Designations 24VAC Output for defrost auxiliary heat output 24VAC nominal 24VAC nominal...
  • Page 32 Unit will run at 100% capacity. Conventional 24VAC heat pump thermostat - Cooling mode 1. Provide a Y1 compressor demand and a O Reversing Valve signal to the 4SHP22LX 2. Install the Charge Mode jumper (after the Y1 demand) Charge Mode Charge Mode 3.

  • Page 33: Servicing Units Delivered Void Of Charge

    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 34: System Operation And Service

    System Operation and Service Automatic Reset 7-Segment Alert and System Status Codes Alert codes are displayed using the 7-segment display After an alert is detected, the outdoor control continues located on the outdoor control. to monitor the unit's system and compressor operations. When/if conditions return to normal, the alert code is turned NOTE: System fault and lockout codes take precedence off automatically.
  • Page 35 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 communicating thermostat.
  • Page 36 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 communicating thermostat.
  • Page 37 • Replace system component (device) control. reset. If error is applicable to any Allied Air variable capacity outdoor unit, the outdoor control will need to be replaced. Automatically clears The secondary voltage for the applicable system component has fallen after voltage is below 18VAC.
  • Page 38 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 communicating thermostat.
  • Page 39 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 communicating thermostat.
  • Page 40 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 communicating thermostat.
  • Page 41 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 communicating thermostat.
  • Page 42 • If condition occurs five times within 60 consecutive minutes, the system will lockout – critical condition. • This alert code may be triggered by the inverter or the Allied Air variable capacity outdoor (inverter controlled) unit. To clear alert code...
  • Page 43 • This alert code will occur if the outdoor unit power is turned off and the indoor unit power (24VAC to Allied Air outdoor control) remains on, or if the indoor unit power is turned off (24VAC to Allied Air outdoor control) and the outdoor unit power is on.
  • Page 44 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 communicating thermostat.
  • Page 45 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 communicating thermostat.
  • Page 46 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 communicating thermostat.
  • Page 47 Strikes Lockout and restart. • Outdoor unit will stop. The Allied Air variable capacity unitary control (outdoor control) has incorrect appliance unit size code selected. Automatically clears • Check for proper configuring under unit size code used for outdoor unit...
  • Page 48 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 49 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 Soft Disable Mode: Top and bottom horizontal line and decimal...

  • Page 50: Unit Selection Code For Outdoor Control

    Description Example of Display Charge Mode: When unit is in the charge mode, Suction The following string is repeated: pressure (SPxxx), Suction Temp (Stxx.x), Superheat (SHxx.x), S P 1 3 5 pause S t 6 2 pause S H 1 5 pause L P 3 4 5 Liquid pressure (LPxxx), Liquid Temp (Ltxx.x) and subcooling pause L t 9 6 pause S C 1 0 Repeat (SCxx.x) will be scrolled on the 7-segment display...
  • Page 51 Idle mode – System is energized with no demand – Decimal flashes at 1 Hertz > 0.5 second ON. 0.5 second OFF Display Symbol Display Fan Test and Display String Option or Character Displayed Display string shows outdoor control firmware version 1 _ 6 > pause > A C or H P unit > pause > unit capacity in during start- BTUs >...
  • Page 52 7-segment display. The following system status codes are be installed on the Charge Mode Pins after providing a Y1 displayed: cooling demand to the 4SHP22LX to initiate the Charge Mode. A cooling blower demand must also be provided to •...
  • Page 53 Display Display and Action (normal operation) Idle mode — decimal flashes at 1 Hertz > 0.5 second ON, 0.5 second OFF Cooling operation. Shows cooling stage C1 or C2 operating if non-communicating. Shows cooling capacity percentage i.e. C 7 0 operating if installed with a A3 communicating thermostat. Example: C 2 0 pause A 7 5 E in the display string represents the active error code(s) in the outdoor unit.

  • Page 54: Configuring Unit

    Configuring Unit When installing a replacement outdoor control, the unit selection code may have to be manually assigned using the 7-segment 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 55: System Overview

    Reconfiguring Outdoor Control using A3 • Liquid line and suction line temperature Thermostat • Outdoor ambient temperature Reconfiguring only applies to 4SHP22LX units installed as • Compressor active alarm a fully communicating system with an A3 thermostat and • Compressor Hz communicating indoor unit.
  • Page 56 Nominal Defrost Time – Range 20 – 840 seconds – demand defrost control target defrost cycle time is unique default 4SHP22LX124 – 100s, 36 – 133s, 48 – 105s, for each 4SHP22LX heat pump model. The target defrost 60 – 102s cycle time of 4SHP22LX124 is 100s, 4SHP22LX136 is 133s, 4SHP22LX148 is 105s, 4SHP22LX160 is 102s.

  • Page 57: Maintenance

    DEFROST TERMINATION DEFROST COIL SENSOR LOCATION JUMPER DEFROST TERMINATION JUMPER Figure 24. Defrost Components Maintenance • Outdoor Coil (Coastal Area) — Moist air in ocean Outdoor Unit locations can carry salt, which is corrosive to most Maintenance and service must be performed by a qualified metal.

  • Page 58: Unit Wiring Diagram

    Unit Wiring Diagram Figure 25. Wiring Diagram Page 58 of 106 Issue 2322 508401-01...

  • Page 59: 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 60 SUCTION Y1 DEMAND PRESSURE OR COOLING PRESSURE CONTACTOR CUT-OUT IS CLOSED CLOSED DEMAND IGNORED FOR ENERGIZED (S87) 90 SECONDS SWITCH IS CLOSED OR LOW PRESSURE OUTDOOR AMBIENT OPEN (S87) CLOSED TEMPERATURE IS 15ºF OR BELOW CONTACTOR DE-ENERGIZED The thermostat terminates demand when the contactor is de-energized.
  • Page 61 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.
  • Page 62 START DEFROST IF DEFROST CYCLE TIME IS STATE CLOSE TO TARGET DEFROST CYCLE TIME (BETWEEN 80% - 120% TARGET DEFROST CYCLE TIME) – NO CHANGE IN FROST ACCUMULATION TIME ACCUMULATE FROST ACCUMULATION TIME – HP RUN TIME IF COIL TEMP BELOW 35°F IF DEFROST CYCLE TIME IS SHORT (80% OR LESS OF TARGET DEFROST CYCLE TIME)

  • Page 63: Component Testing

    The unit’s pressure switches (HPS - S4 and LPS-S87) are wired into the the control HPS and LPS terminals, respectively. NOTE: The 4SHP22LX does not have a low pressure switch and LPS terminals are not jumpered. The unit has a suction pressure transducer that emulates the low pressure switch with a cut-out of 40 PSIG and a cut-in of 90 PSIG.
  • Page 64 Suction Pressure DC Voltage Output Suction Pressure DC Voltage Output (PSIG) (Pin 2 to Pin 3) (PSIG) (Pin 2 to Pin 3) 0.49 2.69 0.69 2.89 0.89 3.09 1.09 3.29 1.29 3.49 1.49 3.69 1.69 3.89 1.89 4.09 2.09 4.29 2.29 4.49 2.49...
  • Page 65 DC Voltage Output (Pin 2 to DC Voltage Output (Pin 2 to Liquid Pressure (PSIG) Liquid Pressure (PSIG) Pin 3) Pin 3) 0.50 2.58 0.58 2.66 0.66 2.74 0.74 2.82 0.82 2.90 0.90 2.98 0.98 3.06 1.06 3.14 1.14 3.22 1.22 3.30 1.30...
  • Page 66 SUCTION Y1 DEMAND PRESSURE OR COOLING PRESSURE CONTACTOR CUT-OUT IS CLOSED CLOSED DEMAND IGNORED FOR ENERGIZED (S87) 90 SECONDS SWITCH IS CLOSED OR LOW PRESSURE OUTDOOR AMBIENT OPEN (S87) CLOSED TEMPERATURE IS 15ºF OR BELOW CONTACTOR DE-ENERGIZED The thermostat terminates demand when the contactor is de-energized.
  • Page 67 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.
  • Page 68 Compressor Operation, Checkout and Status / Error Codes Operation: The 4SHP22LX uses two different types of compressor, depending on the specific model. The 4SHP22LX124 and -36 use a 380VAC three phase variable capacity rotary compressor specifically designed for unitary splits system and is approved for use with HFC 410A refrigerant.
  • Page 69 THERMOSTAT MOTOR SHOWN) (S173) DISCHARGE COMPRESSOR ACCUMULATOR EQUALIZATION VALVE ROTARY COMPRESSION CHAMBER 4SHP22LX ROTARY COMPRESSOR CUTAWAY OF TYPICAL ROTARY COMPRESSOR (NOT ACTUAL 4SHP22LX COMPRESSOR) Figure 36. 4SHP22LX Rotary Compressor Detail (4SHP22LX124, -36 models) 508401-01 Issue 2322 Page 69 of 106...
  • Page 70 Compressor Equalization Valve The compressor equalization valve equalization solenoid equalizes the pressure across the rotary compression chamber allowing the compressor to start unloaded. The 240 VAC solenoid coil is controlled by the inverter. The solenoid coil is powered when the compressor is off to equalize the pressure and is de-energized when the compressor is operating. Status Codes: When the compressor is running, the 7-segment display will show the compressor capacity.
  • Page 71 Error Codes: 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 communicating thermostat.
  • Page 72 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 communicating thermostat.
  • Page 73 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 communicating thermostat.
  • Page 74 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 and Figure 3 for location).
  • Page 75 Figure 40. 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 76 The 4SHP22LX models with a rotary compressor do not have a factory installed filter drier and it is not required on these models. A liquid line filter drier on the rotary compressor models may be field installed if desired.
  • Page 77 Main Power ON – Voltage IN reactor should be the same as the voltage OUT. With main power OFF and reactor disconnected from system; resistance between leads should be the same Status Codes: None Error Codes: None VOLTAGE “IN” VOLTAGE “OUT” Figure 46. 4SHP22LX Reactor 508401-01 Issue 2322 Page 77 of 106...
  • Page 78 Outdoor Fan Operation and Checkout Operation: 4SHP22LX units have a variable speed ECM fan motor. The variable speed ECM fan motor is controlled by PWM fan output when the compressor is running and will vary the fan speed to match the compressor capacity.
  • Page 79 Figure 47. VAC Voltage Check 508401-01 Issue 2322 Page 79 of 106...
  • Page 80 The 4SHP22LX outdoor control provides application flexibility. The 4SHP22LX may be installed with an A3 communicating thermostat in a fully communicating system or with a conventional 24VAC non-communicating single or two stage cooling thermostat.

  • Page 81: System Configuration

    (R, C, Y1, Y2, O and advanced diagnostics and control, Wi-Fi accessibility and W). Refer to the 4SHP22LX field wiring diagram for a system operation parameters. Refer to the 4SHP22LX conventional 24VAC non-communicating 2-stage heat field wiring diagram for an S40 communicating thermostat.

  • Page 82: Cooling Operation Mode Jumper

    4SHP22LX Unit Operation with an A3 Communicating Thermostat Heating Operation Mode Jumper When the 4SHP22LX unit is installed with an A3 Communicating Thermostat and a communicating indoor unit, the unit capacity will be controlled in the variable The Heating Operation Mode Jumper is only used on...
  • Page 83 In single stage thermostat applications, a jumper must be is achieved. The 4SHP22LX unit will cycle off once the installed between Y1 and Y2 on the 4SHP22LX outdoor thermostat demand is satisfied.

  • Page 84: Defrost Function

    Defrost Function The outdoor unit control measures differential temperatures to detect when the system is performing poorly because of ice build-up on the outdoor coil. The controller self- calibrates (see Figure 29) when the defrost system starts and after each system defrost cycle. The outdoor unit control monitors ambient temperature, outdoor coil temperature, and total run-time to determine when a defrost cycle is required.
  • Page 85 Error Codes: 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 communicating thermostat.
  • Page 86 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 communicating thermostat.

  • Page 87: 6-Pin Sensor Harness (Dis, Amb, Coil)

    Unit Sensor Operation, Checkout and Status /Error Codes Operation: 6-Pin Sensor Harness (DIS, AMB, COIL) Discharge Sensor (R7 - No Sensor) There is no sensor located on positions 5 and 6 of the connector. A 10K Ohm resistor installed between pins 5 and 6 on the cable harness provides continuity for this circuit.
  • Page 88 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 Figure 50, may be performing as designed. However, if a shorted or open circuit is detected, then the sensor may be faulty and the sensor harness will need to be replaced.
  • Page 89 Degree Degree Degree Degree Resistance Resistance Resistance Resistance Fahrenehit Fahrenehit Fahrenehit Fahrenehit 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 127.3 3223 54.6 17616 20.0 46281 -13.2...
  • Page 90 Error Codes: 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 communicating thermostat.
  • Page 91 Communication Control Circuit: Receives and sends message between the inverter and the outdoor control. Status Codes: 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 communicating thermostat.
  • Page 92 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 communicating thermostat.
  • Page 93 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 communicating thermostat.
  • Page 94 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 communicating thermostat.
  • Page 95 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 communicating thermostat.
  • Page 96 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 communicating thermostat.
  • Page 97 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 communicating thermostat.
  • Page 98 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 communicating thermostat.
  • Page 99 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 communicating thermostat.
  • Page 100 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 communicating thermostat.

  • Page 101: System Refrigerant

    Charge Mode Pins after providing a Y1 Check airflow using the Delta-T (DT) process using the cooling demand to the 4SHP22LX to initiate the Charge illustration in Figure 53. Mode. A cooling blower demand must also be provided to initiate blower operation on the cooling speed on the indoor unit.
  • Page 102 MANIFOLD GAUGE SET HIGH GAUGE SET OUTDOOR UNIT CONNECTIONS FOR TESTING AND CHARGING REFRIGERANT TANK CHARGE IN LIQUID PHASE SUCTION LINE DIGITAL SCALE TO LIQUID TEMPERATURE SENSOR LINE SERVICE (LIQUID LINE) PORT 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 SUCTION LINE SERVICE PORT.
  • Page 103 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 104 °F Psig °F Psig °F Psig °F Psig °F Psig °F Psig °F Psig °F Psig 100.8 137.1 178.5 231.6 290.8 365.0 445.9 545.6 102.9 139.6 181.6 235.3 295.1 370.0 451.8 552.3 105.0 142.2 184.3 239.0 299.4 375.1 457.6 559.1 107.1 144.8 187.7...
  • Page 105 Figure 56. 4SHP22LX124, 36 Charging Label 508401-01 Issue 2322 Page 105 of 106...
  • Page 106 Figure 57. 4SHP22LX148, 60 Charging Label Page 106 of 106 Issue 2322 508401-01...

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