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Service Manual - HRG18xxS1P
SERVICE MANUAL
HRG18xxS1P
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.
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.
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.
508206-01
Table of Contents
Technical Specifications ..............................................2
Parts Arrangement.......................................................5
General ........................................................................8
Installation ...................................................................8
Refrigerant Piping ......................................................10
Electrical - Circuit Sizing and Wire Routing ...............19
Outdoor Unitary Control.............................................23
Unit Operation ...........................................................25
Servicing Units Delivered Void of Charge..................29
Unit Start-Up ..............................................................29
System Operation and Service ..................................30
Configuring Unit .........................................................45
Maintenance ..............................................................46
Homeowner Information ............................................46
Wiring Diagram ..........................................................48
Unit Sequence of Operation ......................................49
Component Testing ....................................................53
Electric shock hazard.
Can cause injury or death. Before attempting
to perform any service or maintenance,
turn the electrical power to unit OFF at
disconnect switch(es). Unit may have
multiple power supplies.
*P508206-01*
Issue 2140
WARNING
(P) 508206-01
Page 1 of 83
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Related Manuals for Mars Century Comfort-Aire HRG18 S1P Series
Summary of Contents for Mars Century Comfort-Aire HRG18 S1P Series
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Page 1: Table Of Contents
Service Manual - HRG18xxS1P SERVICE MANUAL HRG18xxS1P 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 General ................8... -
Page 2: Technical Specifications
Service Manual - HRG18xxS1P Technical Specifications MODEL NUMBER GUIDE G 18 36 S - 1 P Heat Pump Series / Revisions 4 = R410A Power Residential Split 1 = 208/230-1-60 Heat Pump Selective Capacity Tonnage 'Green' Gas 36, 60 R-410A Seer ELECTRICAL AND PHYSICAL DATA Compressor... - Page 3 Service Manual - HRG18xxS1P SOUND RATINGS Estimated Sound Pressure (dBA) Approximate Distance Sound Model Power One Meter Two Meters Three Meters (3.3 feet) (6.6 feet) (9.8 feet) HRG1836S1P (2 TON MODE) HRG1836S1P (3 TON MODE) HRG1860S1P (4 TON MODE) HRG1860S1P (5 TON MODE) 1 Rated in accordance with AHRI standard 270 (2015) 2 Rated in accordance with AHRI standard 275 (2010) 3 Based only on distance factor;...
- Page 4 Service Manual - HRG18xxS1P ACCESSORIES Description Where Used Kit Number Purpose HRG1836S1P (2 Ton mode) H4TXV01 HRG1836S1P (3 Ton Mode) TXVs provide superior refrigerant flow control, TXV Kit H4TXV02 HRG1860S1P (4 Ton Mode) comfort and efficiency HRG1860S1P (5 Ton mode) H4TXV03 Prevents liquid migration to compressor in cold Crankcase heater...
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Page 5: Parts Arrangement
Service Manual - HRG18xxS1P Parts Arrangement Outdoor Control Board Inverter Contactor Inverter Reactor Voltage Connections Ground Lug Voltage Vent Grommet Figure 1. Parts Arrangement - Control Panel 508206-01 Issue 2140 Page 5 of 83... - Page 6 Service Manual - HRG18xxS1P Accumulator Suction Pressure Transducer Compressor Low Pressure Switch Muffler Check Valve Suction High Pressure Filter Switch Reversing Crankcase Heater Valve Thermostat Liquid Service Valve Vapor Service Liquid Pressure Valve Transducer Figure 2. Parts Arrangement - 3 Ton Page 6 of 83 Issue 2140 508206-01...
- Page 7 Service Manual - HRG18xxS1P Compressor Temperature Limit Compressor High Pressure Switch Muffler Suction Pressure Transducer Reversing Valve Pressure Switch Liquid Pressure Liquid Transducer Service Valve NOTE: Crankcase Heater Vapor Service Valve Thermostat located between Liquid Service Valve and Liquid Pressure Transducer Figure 3.
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Page 8: General
Service Manual - HRG18xxS1P Handle refrigerant with caution; refer to proper MSDS General from refrigerant supplier. Use care when lifting, avoid contact with sharp edges. Read this entire instruction manual, as well as the instructions supplied in separate equipment, before Installation starting the installation. - Page 9 Service Manual - HRG18xxS1P If conditions or local codes require the unit be attached to pad or mounting frame, tie down bolts should be used and IMPORTANT secured to unit base pan. Exhaust vents from dryers, water heaters and furnaces Elevate Unit should be directed away from the outdoor unit.
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Page 10: Refrigerant Piping
Service Manual - HRG18xxS1P DO LOCATE THE UNIT: • Ensure that tubing insulation is pliable and completely surrounds vapor tube. • With proper clearances on sides and top of unit It is important that no tubing be cut or seals broken until you •... - Page 11 Service Manual - HRG18xxS1P NOTE: Length is general guide. Lengths may be more or less, depending on remaining system design WARNING factors. Polyvinyl ether (PVE) oils used with HFC-410A • Maximum linear (actual) length = 150 feet. refrigerant absorb moisture very quickly. It is very •...
- Page 12 Service Manual - HRG18xxS1P Total Linear Length (ft.) Tonnage Line SIze 3/8” 3/8” 1/2” 3/8” 1/2” 3/8” 1/2” NOTE: Shaded rows indicate rated liquid line size. A. Find your tonnage on the left side of the table. B. Start with the rated liquid line size (shaded row) on the outdoor tonnage. C.
- Page 13 Service Manual - HRG18xxS1P Flushing Line Sets Disconnect the liquid line from the expansion valve at the liquid line assembly. If the unit will be installed in an existing system that uses an indoor unit or line sets charged with R-22 refrigerant, Disconnect the expansion valve from the liquid line installer must perform the following flushing procedure.
- Page 14 Service Manual - HRG18xxS1P 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 15 Service Manual - HRG18xxS1P 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 16 Service Manual - HRG18xxS1P 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 17 Service Manual - HRG18xxS1P Leak Test and Evacuation LEAK TEST HIGH MANIFOLD GAUGE SET OUTDOOR UNIT TO VAPOR SERVICE VALVE NOTE - Position canister to deliver liquid refrigerant. NITROGEN HFC-410A CONNECT GAUGE SET A - Connect the high pressure hose of an HFC-410A manifold gauge set to the vapor valve service port. NOTE - Normally, the high pressure hose is connected to the liquid line port.
- Page 18 Service Manual - HRG18xxS1P 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...
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Page 19: Electrical - Circuit Sizing And Wire Routing
Service Manual - HRG18xxS1P HRG18 Low Voltage Control Wiring Connections Electrical - Circuit Sizing and Wire Routing The HRG18 variable capacity units are provided with (2) RAST 6-Pin connections for connecting the field low In the U.S.A., wiring must conform with current local codes voltage control wiring to the HRG18 harnesses in the low and the current National Electric Code (NEC). - Page 20 Service Manual - HRG18xxS1P Qty. of HRG18 Terminal Field Wiring Thermostat Type Indoor Unit Type Wires to Unit Operation Strip Connections Diagram HRG18 Conventional 24VAC 2-Stage Any Furnace or Full Variable Capacity Operation Cooling Air Handler (non- R, C, W1, O, Y1, Y2 Controlled by HRG18 Unitary Control Figure 13 Thermostat (non-...
- Page 21 Service Manual - HRG18xxS1P OUTDOOR UNIT CONNECT CONDUIT TO CUTOUT AND ROUTE HIGH CONNECTS TO VOLTAGE WIRING (2) RAST 6-PIN CONNECTORS LOW VOLTAGE MAKE-UP BOX GROMMET AND CABLE TIE ROUTE CONTROL WIRING THROUGH USE WATERTIGHT GROMMET AND CONDUIT FOR HIGH SECURE WITH VOLTAGE CABLE TIE...
- Page 22 Service Manual - HRG18xxS1P O.D. SENSOR O.D. SENSOR OPTIONAL OPTIONAL ACC2 ACC2 ACC1 ACC1 RAST 6-PIN RAST 6-PIN CONNECTOR CONNECTOR RAST 6-PIN RAST 6-PIN CONNECTOR CONNECTOR VARIABLE CAPACITY TWO STAGE / CONVENTIONAL 24VAC VARIABLE CAPACITY TWO STAGE / CONVENTIONAL 24VAC OUTDOOR UNIT VARIABLE SPEED NON-COMMUNICATING...
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Page 23: Outdoor Unitary Control
Service Manual - HRG18xxS1P 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 Figure 14. 7-Segment Display and Push Button Information labels concerning... - Page 24 Service Manual - HRG18xxS1P The unit will display the unit type for 10 seconds. Press Exiting Charge Mode the push button and hold it for 3 seconds for the unit To exit the charging mode, remove the Charge Mode to store the unit type. Once, the unit code is stored Jumper from the Charge Mode Pins.
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Page 25: Unit Operation
Service Manual - HRG18xxS1P Heating Operation Mode Jumper Unit Operation The Heating Operation Mode Jumper is only used on applications installed with a conventional 24VAC non- communicating heat pump thermostat. In applications HRG18 Unit Operation with a Conventional with a conventional 24VAC non-communicating heat 24VAC Non-Communicating 2-Stage Thermostat pump thermostat, the compressor capacity is controlled to When the HRG18 unit is installed with a conventional... - Page 26 Service Manual - HRG18xxS1P time spend in defrost (defrost time). The outdoor unit control maximum time, the frost accumulation time is set to 30 monitors ambient temperature, outdoor coil temperature minutes. No change is he frost accumulation time is made along with the compressor run time in heating mode if the frost accumulation time is close to the target defrost and defrost cycle time.
- Page 27 Service Manual - HRG18xxS1P 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 28 Service Manual - HRG18xxS1P 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 29: Servicing Units Delivered Void Of Charge
Service Manual - HRG18xxS1P 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 30: System Operation And Service
Service Manual - HRG18xxS1P System Operation and Service 7-Segment Alert and System Status Codes Manual reset can be achieved by one of the following Alert codes are displayed using the 7-segment display methods: located on the outdoor control. • Disconnecting R wire from the outdoor control R terminal. - Page 31 Service Manual - HRG18xxS1P GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), ZA=Zone system and TS=Thermostat Inverter Flash Code Alert Inverter Priority Actual Displayed Component or System Operational State How to Clear Code Code...
- Page 32 Service Manual - HRG18xxS1P GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), ZA=Zone system and TS=Thermostat Inverter Flash Code Alert Inverter Priority Actual Displayed Component or System Operational State How to Clear Code Code...
- Page 33 Service Manual - HRG18xxS1P GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), ZA=Zone system and TS=Thermostat Inverter Flash Code Alert Inverter Priority Actual Displayed Component or System Operational State How to Clear Code Code...
- Page 34 Service Manual - HRG18xxS1P GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), ZA=Zone system and TS=Thermostat Inverter Flash Code Alert Inverter Priority Actual Displayed Component or System Operational State How to Clear Code Code...
- Page 35 Service Manual - HRG18xxS1P GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), ZA=Zone system and TS=Thermostat Inverter Flash Code Alert Inverter Priority Actual Displayed Component or System Operational State How to Clear Code Code...
- Page 36 Service Manual - HRG18xxS1P GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), ZA=Zone system and TS=Thermostat Inverter Flash Code Alert Inverter Priority Actual Displayed Component or System Operational State How to Clear Code Code...
- Page 37 Service Manual - HRG18xxS1P GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), ZA=Zone system and TS=Thermostat Inverter Flash Code Alert Inverter Priority Actual Displayed Component or System Operational State How to Clear Code Code...
- Page 38 Service Manual - HRG18xxS1P GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), ZA=Zone system and TS=Thermostat Inverter Flash Code Alert Inverter Priority Actual Displayed Component or System Operational State How to Clear Code Code...
- Page 39 Service Manual - HRG18xxS1P GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), ZA=Zone system and TS=Thermostat Inverter Flash Code Alert Inverter Priority Actual Displayed Component or System Operational State How to Clear Code Code...
- Page 40 Service Manual - HRG18xxS1P GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), ZA=Zone system and TS=Thermostat Inverter Flash Code Alert Inverter Priority Actual Displayed Component or System Operational State How to Clear Code Code...
- Page 41 Service Manual - HRG18xxS1P GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), ZA=Zone system and TS=Thermostat Inverter Flash Code Alert Inverter Priority Actual Displayed Component or System Operational State How to Clear Code Code...
- Page 42 Service Manual - HRG18xxS1P 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 43 Service Manual - HRG18xxS1P 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.
- Page 44 Service Manual - HRG18xxS1P 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 during Display string shows outdoor control firmware version 1 _ 6 > pause > A C or H P unit > pause > unit capacity in BTUs > pause start-up or power >...
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Page 45: Configuring Unit
Service Manual - HRG18xxS1P 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 46: Maintenance
Service Manual - HRG18xxS1P Maintenance Regular Maintenance Requirements Your system should be regularly inspected by a qualified Remove two service technician. These regular visits may include screws at top (among other things) checks for: panel to remove • Motor operation louvers for coil access. - Page 47 Service Manual - HRG18xxS1P Heat Pump Operation System Switch Your new heat pump has several characteristics that you Set the system switch for heating, cooling or auto should be aware of: operation. The auto mode allows the heat pump to automatically switch from heating mode to cooling mode to •...
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Page 48: Wiring Diagram
Service Manual - HRG18xxS1P Wiring Diagram Figure 20. Wiring Diagram Page 48 of 83 Issue 2140 508206-01... -
Page 49: Unit Sequence Of Operation
Service Manual - HRG18xxS1P 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 50 Service Manual - HRG18xxS1P 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 CLOSED (S87) TEMPERATURE IS 15ºF OR BELOW CONTACTOR DE-ENERGIZED The thermostat terminates demand when the contactor is de-energized.
- Page 51 Service Manual - HRG18xxS1P 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 52 Service Manual - HRG18xxS1P 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...
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Page 53: Component Testing
Service Manual - HRG18xxS1P Component Testing Component Testing Table of Contents Verifying High Pressure Switch and Low Pressure Liquid Line Filter Drier ..........62 Protection Operation..........51 Top Cap Switch Operation, Checkout and Status / Error Verifying Suction Pressure Transducer Operation..52 Codes ................63 Verifying Liquid Pressure Transducer Operation ..53 Reactor Operations, Checkout and Status / Error Codes High Pressure Switch and Low Pressure Protection... -
Page 54: Verifying Suction Pressure Transducer Operation
Service Manual - HRG18xxS1P 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 measured. -
Page 55: Verifying Liquid Pressure Transducer Operation
Service Manual - HRG18xxS1P 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: High Pressure Switch And Low Pressure Protection Errors
Service Manual - HRG18xxS1P High Pressure Switch and Low Pressure Protection Errors GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), ZA=Zone system and TS=Thermostat Inverter Alert Priority Actual Displayed How to Clear Alert Flash Component or System Operational State and Troubleshooting Tip... - Page 57 Service Manual - HRG18xxS1P SCROLL ROTARY COMPRESSOR COMPRESSOR (HRG1860S1P only) 0.883 0.883 0.883 HRG1636S1P 0.587 0.587 0.587 HRG1660S1P Figure 28. 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...
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Page 58: Compressor Equalization Valve
Service Manual - HRG18xxS1P 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. - Page 59 Service Manual - HRG18xxS1P GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), ZA=Zone system and TS=Thermostat Inverter Flash Code Alert Inverter Priority Actual Displayed How to Clear Alert Component or System Operational State and Troubleshooting Tip Code Code Condition...
- Page 60 Service Manual - HRG18xxS1P GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), ZA=Zone system and TS=Thermostat Inverter Flash Code Alert Inverter Priority Actual Displayed How to Clear Alert Component or System Operational State and Troubleshooting Tip Code Code Condition...
- Page 61 Service Manual - HRG18xxS1P GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), ZA=Zone system and TS=Thermostat Inverter Flash Code Alert Inverter Priority Actual Displayed How to Clear Alert Component or System Operational State and Troubleshooting Tip Code Code Condition...
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Page 62: Crankcase Heater, Checkout And Status / Error Codes
Service Manual - HRG18xxS1P 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 locations). -
Page 63: Suction Line Filter Drier
Service Manual - HRG18xxS1P Figure 33. 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: Top Cap Switch Operation, Checkout And Status / Error Codes
Service Manual - HRG18xxS1P The HRG18 models with a rotary compressor do not have a factory installed liquid 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. FIGURE 36. -
Page 65: Reactor Operations, Checkout And Status / Error Codes
Service Manual - HRG18xxS1P 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 66 Service Manual - HRG18xxS1P LOW AMBIENT OPERATION: The HRG18 units have factory installed low ambient cooling mode operation that will control the condenser fan motor based upon liquid line temperature. The HRG18 units have a variable speed ECM fan motor. The outdoor control will begin to modulate the outdoor fan motor speed is below 65°F to maintain a liquid line sensor temperature between 58°F and 70°F.
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Page 67: Outdoor Control Operation, Checkout And Status / Error Codes
Service Manual - HRG18xxS1P 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 ECM motors. -
Page 68: Unit Sensor Operation, Checkout And Status /Error Codes
Service Manual - HRG18xxS1P Unit Sensor Operation, Checkout and Status /Error Codes OPERATION: 6-Pin Sensor Harness (LIQ, AMB, COIL) Liquid 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 69 Service Manual - HRG18xxS1P 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 49, 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 70 Service Manual - HRG18xxS1P Resistance Resistance Resistance Resistance enheit enheit enheit enheit Resistance Resistance Resistance Resistance enheit enheit enheit enheit 136.3 2680 56.8 16657 21.6 44154 -11.3 123152 136.3 2680 56.8 16657 21.6 44154 -11.3 123152 133.1 2859 56.0 16973 21.0 44851 -11.9...
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Page 71: Dc Inverter Control Operation, Checkout, Status / Error Codes
Service Manual - HRG18xxS1P 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 Service Manual - HRG18xxS1P GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), ZA=Zone system and TS=Thermostat Inverter Flash Code Alert Inverter Priority Actual Displayed Component or System Operational State and Troubleshooting How to Clear Alert Code Code...
- Page 73 Service Manual - HRG18xxS1P GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), ZA=Zone system and TS=Thermostat Inverter Flash Code Alert Inverter Priority Actual Displayed Component or System Operational State and Troubleshooting How to Clear Alert Code Code...
- Page 74 Service Manual - HRG18xxS1P GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), ZA=Zone system and TS=Thermostat Inverter Flash Code Alert Inverter Priority Actual Displayed Component or System Operational State and Troubleshooting How to Clear Alert Code Code...
- Page 75 Service Manual - HRG18xxS1P GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), ZA=Zone system and TS=Thermostat Inverter Flash Code Alert Inverter Priority Actual Displayed Component or System Operational State and Troubleshooting How to Clear Alert Code Code...
- Page 76 Service Manual - HRG18xxS1P GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), ZA=Zone system and TS=Thermostat Inverter Flash Code Alert Inverter Priority Actual Displayed Component or System Operational State and Troubleshooting How to Clear Alert Code Code...
- Page 77 Service Manual - HRG18xxS1P GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), ZA=Zone system and TS=Thermostat Inverter Flash Code Alert Inverter Priority Actual Displayed Component or System Operational State and Troubleshooting How to Clear Alert Code Code...
- Page 78 Service Manual - HRG18xxS1P GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), ZA=Zone system and TS=Thermostat Inverter Flash Code Alert Inverter Priority Actual Displayed Component or System Operational State and Troubleshooting How to Clear Alert Code Code...
- Page 79 Service Manual - HRG18xxS1P GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), ZA=Zone system and TS=Thermostat Inverter Flash Code Alert Inverter Priority Actual Displayed Component or System Operational State and Troubleshooting How to Clear Alert Code Code...
- Page 80 Service Manual - HRG18xxS1P GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), ZA=Zone system and TS=Thermostat Inverter Flash Code Alert Inverter Priority Actual Displayed Component or System Operational State and Troubleshooting How to Clear Alert Code Code...
- Page 81 Service Manual - HRG18xxS1P GF= Gas Furnace, AH=Air Handler, ID=Indoor unit (GF or AH), HP=Heat Pump, AC=Air Conditioner, OD=Outdoor Unit (AC or HP), ZA=Zone system and TS=Thermostat Inverter Flash Code Alert Inverter Priority Actual Displayed Component or System Operational State and Troubleshooting How to Clear Alert Code Code...
- Page 82 Service Manual - HRG18xxS1P Page 82 of 83 Issue 2140 508206-01...
- Page 83 Service Manual - HRG18xxS1P Notes _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ _____________________________________________________________________________________ 508206-01 Issue 2140 Page 83 of 83...
- Page 84 Service Manual - HRG18xxS1P 1900 Wellworth Ave., Jackson, MI 49203 • Ph. 517-787-2100 • www.marsdelivers.com 1/2022...