Maytag Amana AVZC18 Service And Troubleshooting Download Page 8 | Manualshive

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SYSTEM OPERATION

8

COOLING CYCLE

Stop Valve

(Liquid)

Stop

Valve

(Gas)

Fan

Motor

HP/LP

OD HP/LP

Sensor

Check Valve

HPS

Outdoor Unit

Indoor Unit

Cooling

EEV

Td

Thermistor

Tm

Thermistor

Tb

Thermistor

Ta

Thermistor

Tl

Thermistor

SubACC

Motor

Check Valve

Reversing Valve

EEV

Filter

Filter

Fan

ACC

Comp

Ts

Thermistor

Filter

Tli

Thermistor

Tgi

Thermistor

HP/LP

ID HP/LP

Sensor

Filter Dryer

Access Tube

Filter

LEGEND:
Tl = Thermistor (Outdoor Liquid Temperature)
Td = Thermistor (Discharge Temperature)
Tb = Thermistor (Defrost Sensor)
Tm = Thermistor (Outdoor Coil Temperature)
Ta = Thermistor (Outdoor Air Temperature)
Tgi = Thermistor (Indoor Gas Temperature)

Tli = Thermistor (Indoor Liquid Temperature)
Ts = Thermistor (Suction Temperature)
OD HP/LP sensor = Outdoor High/Low Pressure Sensor
ID HP/LP sensor = Indoor High/Low Pressure Sensor
HPS = High Pressure Switch

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Summary of Contents for Amana AVZC18

Page 1: ...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...

Page 2: ...ith any other combination is not covered by the warranty SAFE REFRIGERANT HANDLING While these items will not cover every conceivable situa tion they should serve as a useful guide WARNING Refrigerant...

Page 3: ...e a venting terminal may discharge a combination of a hot lubricating oil and refrigerant b flammable mixture if system is contaminated with air in a stream of spray which may be dangerous to anyone i...

Page 4: ...Bridge Technology A V P E C 25 B 1 4 AA 1 2 3 4 5 6 7 8 9 10 11 12 Brand Engineering A Single Piece Air Handler Major Minor Revisions Not used for inventory management Unit Applica on Refrigerant Char...

Page 5: ...It continues to soak up heat and vaporizes as it proceeds through the coil cooling the indoor coil down to about 48 F Heat is continually being transferred to the cool fins and tubes of the indoor eva...

Page 6: ...in the outdoor unit Please note that outdoor equipment operational sound lev els may increase while the equipment is running in BOOST MODE Disabling BOOST MODE will provide the quietest and most effic...

Page 7: ...ensor values will be displayed Outdoor Temperature Coil Temperature Liquid Line Temperature Discharge Temperature Defrost Sensor Suction Pressure PUMP DOWN CHARGE MODE This function can be enabled in...

Page 8: ...er Tli Thermistor Tgi Thermistor HP LP ID HP LP Sensor Filter Dryer Access Tube Filter LEGEND Tl Thermistor Outdoor Liquid Temperature Td Thermistor Discharge Temperature Tb Thermistor Defrost Sensor...

Page 9: ...MOSTAT AND WIRING Communicating Thermostat Wiring The maximum wire length for 18 AWG thermostat wire is 250 feet THERMOSTAT AND WIRING WARNING Line voltage now present With power ON thermostat calling...

Page 10: ...at which the high pressure control cuts out If it cuts out at 605 PSIG to 17 PSIG it is operating normally See causes for high head pres sure in Service Problem Analysis Guide If it cuts out below thi...

Page 11: ...one lead to ground 3 Using the other lead of the Megometer check the insula tion between U to ground V to ground W to ground Compressor Terminal Unpainted Refrigerant Piping TESTING COMPRESSOR WINDING...

Page 12: ...he range of 40 to 50 TESTING REVERSING VALVE CHECKING REVERSING VALVE AND SOLENOID Reversing valve used in heat pumps could potentially leak internally Discharge gases can leak into the suction inside...

Page 13: ...n a single red LED The estimated CFM is displayed on an on board 7 segment display For example if the CFM is 1240 CFM 7 segment display shows FC A 12 40 The AVPEC air handlers may be used in a fully c...

Page 14: ...low check thermostat wiring for opens shorts 5 The network troubleshooting chart provides additional communications troubleshooting information Terminals Nonimal dc Voltages 1 to C 2 5 Vdc 2 to C 2 5...

Page 15: ...E Failure to follow proper procedures may cause property damage personal injury or death IMPORTANT NOTE Because of the potential damage to compressors do not allow suction pressure at service valve to...

Page 16: ...s may cause property damage personal injury or death CAUTION Use refrigerant certified to AHRI standards Used refrigerant may cause compressor damage and is not covered by the warranty Most portable m...

Page 17: ...ubcooling equals the degrees of temperature decrease below the saturation temperature at the existing pressure 1 Attach an accurate thermometer or preferably a ther mocouple type temperature tester to...

Page 18: ...igerant oil and motor insulation to decom pose forming acids and sludge If a compressor is suspected of being burned out attach a refrigerant hose to the liquid line dill valve and properly remove and...

Page 19: ...igerant lines must not touch wall Strap Sleeve Strap Sleeve Wire Tie Wire Tie PVC Pipe Caulk Outside Wall Armaflex Wrapped Suction Line Liquid Line Wood Block Between Studs IMPORTANT Refrigerant lines...

Page 20: ...are securely anchored Strapping placed around the suction line only SECTION 3 OUTDOOR UNIT IS ABOVE THE INDOOR UNIT 1 Gas line must be sloped continuously towards the indoor unit 2 The maximum elevati...

Page 21: ...be installed in a manner to prevent liquid migration to the outdoor unit from the indoor unit The heat pump condenser unit is shipped with a predetermined factory charge level as shown in the followi...

Page 22: ...inlet of the unit Negative Pressure 2 Measure the static pressure of the supply duct Pos itive Pressure 3 Add the two 2 readings together 4 Consult unit nameplate for quantity of air Checking Static...

Page 23: ...circulator blower This blower provides several automatically adjusted blower speeds The Specification Sheet applicable to your model provides an airflow table showing the relationship between airflow...

Page 24: ...is man ual for assistance in determining the source of unit oper ational problems The 7 segment LED display will provide any active fault codes An arrow printed next to the display indicates proper or...

Page 25: ...GE TRIP OR OVER TEMPERATURE TRIP Voltage or Temperature Trip b7 INCOMPLETE PARAMETER SENT TO MOTOR Incomplete Parameters Sent to Motor b9 LOW INDOOR AIRFLOW Minor Error Code without EH mode No Display...

Page 26: ...circulator motor power leads Open circuit in inductor or loose wiring connection at inductor 3 4 Hp and 1 Hp models only Failed circulator blower motor Tighten or correct wiring connection Verify con...

Page 27: ...eTalk communications wiring Coil Temperature Sensor Open No coil temperature Sensor not connected or broken wire Check if coil sensor is connected Replace coil sensor Coil Temperature Sensor Shorted N...

Page 28: ...ric heat operation during defrost 1 low stage 2 default high stage Heat Pump Indoor Airflow Trim default 0 Heat Pump Heating Airflow Off Delay Time default 60 seconds Cooling Airflow On Delay Time def...

Page 29: ...at pump for primary heating Menu is enabled if the menu is set to 6 This percentage will help determine when switching back to heat pump only operation is appropriate Default 20 If target time 20 minu...

Page 30: ...range selected in the COOL RPS RANGE menu Select the appropriate compressor RPS for the installed system configuration SUBMENU ITEM USER MODIFIABLE OPTIONS COMMENTS HT Reset YES or NO Selecting to def...

Page 31: ...ating status will not be shown in the thermostat status menu or on the outdoor 7 segment displays The 7 segment displays on indoor control board will display EE 1 HEATING EMERGENCY MODE Emergency Heat...

Page 32: ...15 ON OFF ON ON Sixth X 19 20 20 ON OFF ON OFF Seventh X X X 25 ON OFF OFF ON Switch Bank DS 3 Indoor Control Board Settings Heater Kit Selection Heater kW Dip Switch Setting NOTE Default factory sett...

Page 33: ...el 8 minutes 10 minutes 50 High Cool Level 15 minutes 6 minutes 70 NOTE This mode does not require a thermostat Any thermostat requests will be ignored while in emergency operation NOTE Set indoor DS...

Page 34: ...Enable 16 OFF No Use 17 ON Emergency EEV Opening 18 OFF Emergency EEV Opening 19 OFF EEV Emergency Mode 20 OFF No Use 21 OFF Emergency mode Cooling and Hea ng Emergency Mode 22 OFF Emergency mode Cool...

Page 35: ...sponding Screen within the display itself which allows the user to navigate and use the features Example The Fault Code is accessed and displayed from Screen 0 of the 7 segment display The Fault Histo...

Page 36: ...t fault To access hold the RECALL button for 5 seconds at screen 0 To access hold the RECALL button for 5 seconds at screen 1 To access hold the RECALL button To access hold the RECALL and TEST button...

Page 37: ...allow the user to see the six most recent system faults For a list of the fault codes please see the TROUBLESHOOTING tables in this document 1 SCREEN 0 SCREEN 1 The display will change to SCREEN 1 Di...

Page 38: ...Press RECALL Item number Display flickers at 1 second intervals Value MONITORING MODE NAVIGATION SCR This screen allows the user to monitor system variables as shown in the tables at the end of this s...

Page 39: ...n in the tables at the end of this section SCREEN 0 Press RECALL Press RECALL to increase the value Press TEST to change setting Press RECALL Press TEST to complete setting and return to setting mode...

Page 40: ...CALL Press TEST to change setting Press RECALL Press TEST to complete setting and return to setting mode Press RECALL Press RECALL Press RECALL SCREEN 0 OFF ON Blink interval 0 4 sec On 0 4 sec Off Pr...

Page 41: ...tart up 3 Oil Return Operation 4 Heating Operation 5 Defrost Operation 6 Cooling Operation 3 Compressor Reduction Mode 0 OFF 1 ON 4 demand unit Cut off the decimal first place 5 act demand unit Cut of...

Page 42: ...12 4 3 10 15 5 0 4 Cool Profile 0 A 2 C 1 B 3 D 5 Cool ON Delay 0 5sec 2 20sec 1 10sec 3 30sec 6 Cool OFF Delay 0 30sec 2 90sec 1 60sec 3 120sec 7 Dehumidfication Select 0 ON 1 OFF 8 Heat Airflow Trim...

Page 43: ...oor Lower 2 Indoor Lower 4 System Verification Test 0 ON 1 OFF 7 Force Defrost Cycle 0 ON 1 OFF 8 Pump Down 0 ON 1 OFF 9 Charge Mode 0 ON 1 OFF 10 Maximum Compressor RPS for Cooling 11 Maximum Compres...

Page 44: ...er X X X X X X Outdoor Ambient temp is too high X X X X X X Outdoor Ambient temp is too low X X X X X X X X X X ID suction temp is too high X X X X X ID suction temp is too low X X X Mixture of non co...

Page 45: ...X Outdoor Ambient temp is too low X X X X X X X X X ID suction temp is too high X X ID suction temp is too low X X X X X X X X X Mixture of non condensible gas X X X X X X X X X X OD fan motor failur...

Page 46: ...w pressure faults Control has determined continued operation is acceptable This indicates they may be a problem with the equipment Stop valve not completely open Restriction in refrigerant lines Low r...

Page 47: ...Faulty control board Noise Check wiring to control board Repair as needed Replace control board if necessary 32 E32 HI TEMP CTRL1 This error indicates the equipment is experiencing high temperature fa...

Page 48: ...o power supply as specified on rating plate Correct low line voltage condition Contact local utility if needed 43 E43 HIGH LINE VOLT Control detects a high power supply voltage condition High line vol...

Page 49: ...eeded Check the connection to thermistors Repair replace if needed B0 Eb0 NO ID AIRFLOW The estimated airflow from indoor subsystem is near to 0 CFM Failed indoor blower motor Indoor fan motor not pro...

Page 50: ...rk traffic The table below indicates the LED status and the corre sponding potential problem LEARN button Used to reset the network Press the button for approximately 5 seconds to reset the network LE...

Page 51: ...42 13 04 1 42 147 37 3 95 13 07 1 42 40 104 10 63 1 22 10 63 1 22 118 68 3 76 10 65 1 22 45 113 8 71 1 04 8 71 1 04 96 13 3 56 8 73 1 05 50 122 7 18 0 89 7 18 0 89 78 29 3 34 7 18 0 89 55 131 5 95 0...

Page 52: ...128 7 596 148 4 60 8 6 162 57 0 264 87 4 366 110 4 468 0 129 0 600 149 0 62 10 0 164 57 7 266 87 9 368 110 8 470 0 129 3 604 149 5 64 11 3 166 58 4 268 88 4 370 111 2 472 0 129 7 608 150 1 66 12 6 168...

Page 53: ...299 88 86 84 82 80 78 308 90 88 86 84 82 80 317 92 90 88 86 84 82 326 94 92 90 88 86 84 335 96 94 92 90 88 86 345 98 96 94 92 90 88 354 100 98 96 94 92 90 364 102 100 98 96 94 92 374 104 102 100 98 96...

Page 54: ...ide the sheet metal plate with the electrical board behind the refrigerant tubing as shown PCB MOUNTING PLATE PCB SLIDE RAIL PCB ASSY INSTALL THE ELECTRICAL BOARD When working on a service port ensure...

Page 55: ...E THE STATIC ELECTRICITY FROM YOUR BODY TO PREVENT FAILURE OF THE PC BOARD 3 MEASURE THE RESIDUAL VOLTAGE IN THE SPECIFIED MEASUREMENT POSITION USING A VOM WHILE PAYING ATTENTION NOT TO TOUCH THE CHAR...

Page 56: ...E THE STATIC ELECTRICITY FROM YOUR BODY TO PREVENT FAILURE OF THE PC BOARD 3 MEASURE THE RESIDUAL VOLTAGE IN THE SPECIFIED MEASUREMENT POSITION USING A VOM WHILE PAYING ATTENTION NOT TO TOUCH THE CHAR...

Page 57: ...COLOR AMBIENT THERMISTOR SUCTION GR LINE DISCHARGE LIQUID LINE DEFROST COIL CIRCUIT SEG1 SEG2 SEG3 TO TSTAT OR INDOOR UNIT FIELD WIRING SEE NOTE 3 208 230 V 60 HZ NOTES 1 THE POSITION OF THE SELECTOR...

Page 58: ...2 WIRE SELECTOR SWITCH DS1 DS6 DS6 X1A X3A X15A BS2 X5A X2A BS1 SEG2 SEG1 DS1 DS2 DS3 DS4 DS5 X7A X12A X13A RX LED X8A INDOOR UNIT PCB THERMISTOR HEAT EXCHANGER 1 2 INTEGRATION TYPE MPU CPU LED STATU...

Page 59: ...ANDBY NO THERMOSTAT INPUTS 6 YELLOW STATUS LED PROVIDES NETWORK STATUS GREEN RX LED INDICATES NETWORK TRAFFIC 7 DISCARD CONNECTOR PL1 WHEN INSTALLING OPTIONAL HEAT KIT 8 REMOVE SHORTING PLATE FROM THE...

Page 60: ...et up menu on the thermostat and DIP switch on indoor unit control board For more information please see indoor unit I O manual For match up with a 2 ton outdoor unit Heater kit application shall not...

Page 61: ...A minimum of field wiring is required to complete the installation Other components such as a Heating Cooling Thermostat and Outdoor Thermostats are available to complete the installation The system...

Page 62: ...0 23800 32400 48600 66500 71600 ELECTRIC HEATER CAPACITY BTUH FORMULAS Heating Output KW x 3 413 x Corr Factor Actual CFM CFM from table x Corr Factor BTUH KW x 3 413 BTUH CFM x 1 08 x Temperature Ris...

Page 63: ...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 B...

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