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Service and Troubleshooting
A/GPU 13.4 SEER2 Gas-Electric Ultra-Low Nox Heating &
Pride and workmanship go into every product to provide
our customers with quality products. It is possible, however,
that during its lifetime a product may require service.
Products should be serviced only by a qualified service
technician who is familiar with the safety procedures
required in the repair and who is equipped with the proper
tools, parts, testing instruments and the appropriate service
manual. REVIEW ALL SERVICE INFORMATION IN THE
APPROPRIATE SERVICE MANUAL BEFORE
BEGINNING REPAIRS.
Only personnel that have been trained to install, adjust,
service, maintenance or repair (hereinafter, "service")
the equipment specified in this manual should service the
equipment. The manufacturer will not be responsible for
any injury or property damage arising from improper
service or service procedures. If you service this unit, you
assume responsibility for any injury or property damage
which may result. In addition, in jurisdictions that require
one or more licenses to service the equipment specified in
this manual, only licensed personnel should service the
equipment. Improper installation, adjustment, servicing,
maintenance or repair of the equipment specified in this
manual, or attempting to install, adjust, service or repair
the equipment specified in this manual without proper
training may result in product damage, property damage,
personal injury or death.
Do not bypass safety devices.
Cooling Unit
WARNING
WARNING
© 2021-2022 Daikin Comfort Technologies Manufacturing, L.P.
TABLE OF CONTENTS
IMPORTANT INFORMATION ............................................ 2
PRODUCT IDENTIFICATION ........................................... 4
SYSTEM OPERATION ...................................................... 6
SCHEDULED MAINTENANCE ....................................... 10
SERVICING ..................................................................... 13
CHECKING VOLTAGE .............................................. 13
CHECKING WIRING .................................................. 13
CHECKING THERMOSTAT AND WIRING ................ 13
CIRCUIT ..................................................................... 14
CHECKING CONTACTOR AND/OR RELAYS ........... 14
CHECKING CONTACTOR CONTACTS ..................... 14
CHECKING FAN RELAY CONTACTS ........................ 15
CHECKING HIGH PRESSURE CONTROL ............... 15
CHECKING LOW PRESSURE CONTROL ................ 15
CHECKING CAPACITOR ........................................... 15
CAPACITANCE CHECK (MFD) .................................. 16
WINDINGS(PSC MOTORS) ....................................... 17
CHECKING ECM MOTOR WINDINGS ...................... 17
CHECKING EEM MOTORS ....................................... 17
CHECKING COMPRESSOR ...................................... 18
RESISTANCE TEST ................................................... 18
GROUND TEST .......................................................... 19
UNLOADER TEST PROCEDURE ............................. 19
OPERATION TEST ..................................................... 20
LOCKED ROTOR TEST ............................................ 20
REFRIGERATION REPAIR PRACTICE ..................... 21
STANDING PRESSURE TEST .................................. 21
(NITROGEN OR NITROGEN-TRACED) .................... 21
SYSTEM EVACUATION ............................................. 22
DEEP VACUUM METHOD (RECOMMENDED) ......... 22
TRIPLE EVACUATION METHOD (ALTERNATE) ...... 22
RS6313002r3
September 2022
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Related Manuals for Amana APUM3 M41AA Series
Summary of Contents for Amana APUM3 M41AA Series
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Page 1: Table Of Contents
Service and Troubleshooting A/GPU 13.4 SEER2 Gas-Electric Ultra-Low Nox Heating & Cooling Unit TABLE OF CONTENTS Pride and workmanship go into every product to provide our customers with quality products. It is possible, however, that during its lifetime a product may require service. IMPORTANT INFORMATION .......... -
Page 2: Important Information
IMPORTANT INFORMATION IMPORTANT NOTICES RECOGNIZE SAFETY SYMBOLS, WORDS AND CHARGING ..............23 LABELS REFRIGERANT CHARGE CHECK ......23 SUPERHEAT .............. 23 CHECKING SUBCOOLING ........24 CHECKING COMPRESSOR EFFICIENCY ....24 WARNING THERMOSTATIC EXPANSION VALVE ...... 24 OVERFEEDING ............25 To prevent the risk of property damage, personal injury, or UNDERFEEDING ............ - Page 3 IMPORTANT INFORMATION SAFE REFRIGERANT HANDLING WARNING While these items will not cover every conceivable situation, they should serve as a useful guide. The compressor POE oil for R-410A units is extremely susceptible to moisture absorption and could cause compressor failure. Do not leave system open to atmosphere any longer than necessary for installation.
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Page 4: Product Identification
The model number is used for positive identification of component parts used in manufacturing. Please use this number when requesting service or parts information. 8,9,10 14,15 Brand Engineering Goodman® brand Major/ Minor Revisions Amana® brand Product Category Electrical Packaged Unit 1 208-230/1/60 Unit Type Refrigerant Gas/Electric... - Page 5 Single Phase Package Gas Units Model # Description Amana® Brand Ultra-Low NOx Package Gas 13.4 SEER(2) R410A Multi-Position gas / APUM3[24-61]***M41AA electric units. Initial release of models meeting DOE 2023 Regulatory Requirements. Goodman® Brand Ultra-Low NOx Package Gas 13.4 SEER(2) R410A Multi-Position gas GPUM3[24-61]***M41AA / electric units.
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Page 6: System Operation
SYSTEM OPERATION Cooling Heating The refrigerant used in the system is R-410A. It is a clear, The heating cycle is accomplished by using a unique colorless, non-toxic and non-irritating liquid. R-410A is a tubular design heat exchanger which provides efficient gas 50:50 blend of R-32 and R-125. - Page 7 SYSTEM OPERATION • STEADY HEAT – Control inputs are continuously Cool Mode 1. When the thermostat calls for cooling (“Y”), the control monitored for ensure limit and pressure switches are closed, flame is established and the thermostat call for energizes the cooling speed fan after a 7 second heat remains.
- Page 8 The ID Plug will populate the board with the correct operating parameters for each model and should be left on the board once installed. Please see the table below for reference: Part Number Goodman / Amana 0130G00012 *PUM3**040M41AA 0130G00013 *PUM3**060M41AA...
- Page 9 SYSTEM OPERATION Typical Package Cooling or Package Gas Either a thermostatic expansion valve or restrictor orifice assembly may be used depending on model, refer to the parts catalog for the model being serviced. Restrictor Orifice Assembly in Cooling Operation In the cooling mode, the orifice is pushed into its seat forcing refrigerant to flow through the metered hole in the center of the orifice.
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Page 10: Scheduled Maintenance
SCHEDULED MAINTENANCE Package gas units require regularly scheduled 9. Start the system, using the proper instrumentation maintenance to preserve high performance standards, check gas inlet and manifold pressures, burner flame prolong the service life of the equipment, and lessen the and microamp signal. - Page 11 SCHEDULED MAINTENANCE 6. Check with your local utility for actual BTU content Clocking a Gas Meter 1. Turn off all gas appliances in the home. (caloric value) of natural gas in the area (the average is 1025 BTU’s). 2. Turn on the furnace. Ensure the furnace is operating 7.
- Page 12 SCHEDULED MAINTENANCE Table 2...
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Page 13: Servicing
SERVICING Checking Voltage 1. Check wiring visually for signs of overheating, damaged insulation and loose connections. WARNING 2. Use an ohmmeter to check continuity of any suspected open wires. 3. If any wires must be replaced, replace with High Voltage! Disconnect all power before servicing or comparable gauge and insulation thickness. -
Page 14: Checking Transformer And Control Circuit
SERVICING Checking Transformer and Control Circuit Checking Contactor and/or Relays WARNING WARNING High Voltage! High Voltage! Disconnect all power before servicing or Disconnect all power before servicing or installing. Multiple power sources may be installing. Multiple power sources may be present. -
Page 15: Checking Fan Relay Contacts
SERVICING 2. Attach a gauge to the high pressure service port. With power ON: WARNING Line voltage now present. 3. Start the system and place a piece of cardboard in front of the condenser coil, raising the condensing pressure. 4. Check pressure at which the high pressure control cuts-out. -
Page 16: Capacitance Check (Mfd)
SERVICING This check valve closes off high side pressure to the compressor after shut down allowing equalization through the scroll flanks. Equalization requires only about one or two seconds during which time the compressor may turn backwards. Your unit comes with a 180-second anti-short cycle to prevent the compressor from starting and running backwards. -
Page 17: Checking Fan And Blower Motor Windings(Psc Motors)
SERVICING 6. Place leads from C – FAN. Checking ECM Motor Windings 7. Compare to capacitor rating label. If the reading is WARNING within the tolerance listed on rating label the capacitor is good. High Voltage! Disconnect all power before servicing or If the reading is lower, the capacitor is bad and must be installing. -
Page 18: Checking Compressor
SERVICING 3. If voltage was present in steps 1 and 2, the motor has Ignition of the discharge can also occur at the venting failed and will need to be replaced. terminal or inside the compressor, if there is sufficient contaminant air present in the system and an electrical arc NOTE: When replacing motor, ensure the belly band is occurs as the terminal vents. -
Page 19: Ground Test
SERVICING WARNING Damage can occur to the glass embedded terminals if the leads are not properly removed. This can result in terminal and hot oil discharging. Testing Compressor Windings If either winding does not test continuous, replace the compressor. NOTE: If an open compressor is indicated, allow ample time for the internal overload to reset before replacing compressor. -
Page 20: Operation Test
SERVICING 3. If clicks can’t be heard, shut off power to the unit and remove the control circuit molded plug from the WARNING compressor and measure the unloader coil resistance (connections on the compressor). The solenoid coil Line voltage now present. should have continuity and not be grounded or have infinite resistance. -
Page 21: Refrigeration Repair Practice
SERVICING Standing Pressure Test WARNING (Recommended before System Evacuation) WARNING Disconnect ALL power before servicing. To avoid the risk of fire or explosion, never use oxygen, high pressure air or flammable gases for leak testing of a 1. Disconnect the heater lead in wires. refrigeration system. -
Page 22: System Evacuation
SERVICING System Evacuation Condensing unit liquid and suction valves are closed to 5000 contain the charge within the unit. The unit is shipped with 4500 the valve stems closed and caps installed. Do not open 4000 valves until the system is evacuated. LEAK(S) 3500 PRESENT... -
Page 23: Charging
SERVICING Charging manifold valve and transfer the liquid refrigerant from the liquid line hose and charging cylinder hose into the WARNING suction service valve port. CAREFUL: Watch so that liquid refrigerant does not enter the compressor. REFRIGERANT UNDER PRESSURE! • Do not overcharge system with refrigerant. Due to their design, Scroll compressors are inherently more •... -
Page 24: Checking Subcooling
SERVICING C. Thermometer on Liquid line = 109°F. To obtain the amount of subcooling, subtract 109°F from 120°F. The difference is 11° subcooling. See the specification sheet or technical information manual for the design subcooling range for your unit. See R410A Pressure vs. Temperature chart. Expansion Valve (TXV) System Two Speed Application (*PUM3(61)) Run the unit on high stage cooling for 15-20 minutes until... -
Page 25: Overfeeding
SERVICING This regulation of the flow prevents the return of liquid refrigerant to the compressor. CAUTION The three forces which govern the operation of the valve To prevent personal injury, carefully connect and disconnect manifold gauge hoses. Escaping liquid are: (1) the pressure created in the power assembly by the refrigerant can cause burns. - Page 26 SERVICING Pressure vs. Temperature Chart R-410A PSIG °F PSIG °F PSIG °F PSIG °F PSIG °F PSIG °F -37.7 37.8 74.3 100.2 120.7 137.6 114.0 216.0 318.0 420.0 522.0 -34.7 116.0 38.7 218.0 74.9 320.0 100.7 422.0 121.0 524.0 137.9 -32.0 39.5 75.5...
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Page 27: Checking Restricted Liquid Line
SERVICING If a restriction should become evident, proceed as follows: There are other causes for high head pressure. 1. Recover refrigerant charge. 2. Remove the orifice or tube strainer assembly and If other causes check out normal, an overcharge or a replace. -
Page 28: Suction Line Drier Clean-Up Method
Too much air can cause motor overloading and in NOTE: The Flushing Method using R-11 refrigerant many cases this constitutes a poorly designed system. To is no longer approved by Amana® Brand Heating- determine proper air movement, proceed as follows: Cooling. -
Page 29: Checking Temperature Rise
SERVICING Airflow Adjustments A/GPUM3 models are equipped with EEM motors. Adjust the CFM for the unit by changing the 24V low voltage leads to the speed terminal block on the motor. SUPPLY FAN ONLY HEATING COOLING SPEED LEAD SPEED LEAD SPEED LEAD DEFINITION... -
Page 30: Testing Auxiliary Limit
SERVICING The control will automatically reset when the temperature within the combustion chamber is sufficiently lowered. WARNING High Voltage! WARNING Disconnect all power before servicing or installing. Multiple power sources may be present. Failure to do so may cause property High Voltage! damage, personal injury or death. -
Page 31: Limit Switch Operation
SERVICING If the burner temperature switch has opened, the circuit between the ignition control and gas valve will be interrupted and the ignition control module will go into lockout. The servicer should reset the ignition control by Checking Burner Limit Switch opening and closing the thermostat circuit. -
Page 32: Checking Gas Pressure
SERVICING Testing Inducer Motor Checking Gas Pressure Gas inlet and manifold pressures should be checked and WARNING adjusted in accordance to the type of fuel being consumed. High Voltage! WARNING Disconnect all power before servicing or installing. Multiple power sources may be present. -
Page 33: Field Test Mode
SERVICING If operating pressures differ from above, make necessary pressure regulator adjustments, check piping size, etc., WARNING and/or consult with local utility. High Voltage! Checking Pressure Transducer Disconnect all power before servicing or installing. Multiple power sources may be NOTE: *PU3M models utilize a pressure transducer (in present. -
Page 34: Checking Flame Sensor
SERVICING Checking Integrated Igntion Control Board DSI Direct Spark Ignition Systems NOTE: Failure to earth ground the unit, or a high WARNING resistance connection in the ground may cause the control to lockout due to failure to sense flame. The ground wire must run from the unit ground to the High Voltage! Disconnect all power before servicing or... -
Page 35: Blower Performance Data
BLOWER PERFORMANCE DATA A/GPUM32404041 - Rise Range: 25° - 55° T1 FAN ONLY SPEED T2 HEATING SPEED T3 HEATING SPEED T4 COOLING SPEED T5 COOLING SPEED E.S.P. WATTS RISE WATTS RISE WATTS RISE WATTS WATTS 1080 1020 1119 1032 1110 1083 1052 1017... - Page 36 BLOWER PERFORMANCE DATA A/GPUM34808041 - Rise Range: 30° - 60° T1 FAN ONLY SPEED T2 HEATING SPEED T3 HEATING SPEED T4 COOLING SPEED T5 COOLING SPEED E.S.P. WATTS WATTS RISE WATTS RISE WATTS WATTS 1090 1363 1304 1851 1928 1024 1305 1242 1803...
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Page 37: Troubleshooting
TROUBLESHOOTING PCBBL216 ULN CONTROL ERROR CODES MINIMUM DESCRIPTION COLOR POSSIBLE CAUSES CORRECTIVE ACTIONS ACTIVITY LOCKOUT PERIOD No 240 volt power to unit • Confirm 240- and 24-volt power to integrated • NO 24 VAC POWER or 24 volt power to control control board. - Page 38 TROUBLESHOOTING MINIMUM DESCRIPTION COLOR POSSIBLE CAUSES CORRECTIVE ACTIONS ACTIVITY LOCKOUT PERIOD OEM FACTORY TEST STEADY ON AMBER MODE RAPID FIELD TEST MODE AMBER FLASH • Flame sensor incorrectly • Inspect for proper sensor alignment. positioned in burner • Clean flame rod. flame.
- Page 39 TROUBLESHOOTING TROUBLESHOOTING Resetting From Lockout An external lockout occurs if the integrated ignition control determines that a measurable combustion cannot be Ignition Control Error Codes established within three (3) consecutive ignition attempts. The following presents probable causes of questionable If flame is not established within the four (4) second trial for unit operation.
- Page 40 TROUBLESHOOTING Primary Limit ID Plug A primary limit will open due to excessive supply air The control operational parameters are stored in ID Plug temperatures. This can be caused by a dirty filter, which connects on the circuit board. The control requires a excessive duct static, insufficient air flow, or a faulty limit.
- Page 41 MAINTENANCE MAINTENANCE Flame Sensor (Qualified Servicer Only) A drop in the flame current can be caused by a nearly invisible coating on the flame sensor. This coating, created WARNING by the fuel or combustion air supply, can be removed by carefully cleaning the flame sensor with steel wool.
- Page 42 MAINTENANCE WARNING To avoid personal injury or death due to electric shock, do not remove any internal compartment covers or attempt any adjustment. Contact a qualified servicer at once if an abnormal flame should develop. The Ultra low NOx models are equipped with premix burner.
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Page 43: Wiring Diagrams
WIRING DIAGRAMS ECONOMIZER 24VAC/DC ROOM THERMOSTAT Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring. - Page 44 WIRING DIAGRAMS NOTICE: The cutout speed & hard start settings are factory preset. Changing those settings may cause early motor failure. Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.
- Page 45 WIRING DIAGRAMS *PUM3(24-48)***41 HIGH VOLTAGE! Disconnect ALL power before servicing or installing this unit. Multiple power sources may be present. Failure to do so may cause property damage, personal injury or death. LINE VOLTAGE 208-230V/1PH/60Hz PLM PLF PCBBL216 PS VCC t = 180s PLM PLF COMP...
- Page 46 WIRING DIAGRAMS *PUM3(61)***41** HIGH VOLTAGE! Disconnect ALL power before servicing or installing this unit. Multiple power sources may be present. Failure to do so may cause property damage, personal injury or death. LINE VOLTAGE 208-230V/1PH/60Hz PLM PLF PCBBL216 COMP PS VCC PLM PLF NC BTS t = 180s...
- Page 47 Please fill out the feedback form on one of the following links: Goodman Brand Products: (http://www.goodmanmfg.com/about/contact-us). ® Amana Brand Products: (http://www.amana-hac.com/about-us/contact-us). ® You can also scan the QR code on the right for the product brand you purchased to be directed to the feedback page. GOODMAN BRAND ®...