Download
Share
Print this page
Haier 2U20EH2VHA Service Manual
  1. Manuals
  2. Brands
  3. Haier Manuals
  4. Heat Pump
  5. Arctic Multi 2U20EH2VHA
  6. Service manual
Haier 2U20EH2VHA Service Manual

Haier 2U20EH2VHA Service Manual

Ductless multi-split heat pump
Hide thumbs Also See for 2U20EH2VHA:

Advertisement

Quick Links

Download this manual
Ductless Multi-Split Heat Pump
Design may vary by model number.
L'aspect peut varier selon le numéro de modèle.
Service Manual
Outdoor
Indoor
Wall Mount - Highwall
2'x2' Compact Cassette
3'x3' Large Cassette
Medium Static Ducted
El diseño puede variar según el número de model.
31-5000698 Rev. 0 03-25
2U20EH2VHA
3U24EH2VHA
4U36EH2VHA
AW07EH2VHA
AW09EH2VHA
AW12EH2VHA
AW18EH2VHA
AW07LC2VHB
AW09LC2VHB
AW12LC2VHB
AW18LC2VHB
AW24LP2VHA
AB09SC2VHA
AB12SC2VHA
AB18SC2VHA
AL24LP2VHA
Slim Duct
AD07SL2VHB
AD09SL2VHB
AD12SL2VHB
AD18SL2VHB
Mid-Static Ducted
USYM09UCDSA
USYM12UCDSA
USYM18UCDSA
USYM24UCDSA
AM24LP2VHA
Console
USYF09UCDWA
USYF12UCDWA
USYF18UCDWA

Advertisement

loading
Need help?

Need help?

Do you have a question about the 2U20EH2VHA and is the answer not in the manual?

Questions and answers

Related Manuals for Haier 2U20EH2VHA

Summary of Contents for Haier 2U20EH2VHA

  • Page 1 Service Manual Outdoor Ductless Multi-Split Heat Pump 2U20EH2VHA 3U24EH2VHA 4U36EH2VHA Indoor Wall Mount - Highwall AW07EH2VHA AW09EH2VHA AW12EH2VHA AW18EH2VHA AW07LC2VHB AW09LC2VHB AW12LC2VHB AW18LC2VHB AW24LP2VHA 2’x2’ Compact Cassette AB09SC2VHA AB12SC2VHA AB18SC2VHA 3’x3’ Large Cassette AL24LP2VHA Slim Duct AD07SL2VHB AD09SL2VHB AD12SL2VHB AD18SL2VHB...
  • Page 2 31-5000698 Rev. 0...
  • Page 3 ....................13 RECORD KEEPING Thank you for purchasing this Haier product. This installation manual _______________________________________ will help you get the best performance from your new heat pump.
  • Page 4 IMPORTANT SAFETY INFORMATION • Read these Safety Precautions carefully to ensure correct installation. • This manual classifies the precautions by WARNING and CAUTION. • Follow all precautions below. They are all important for ensuring safety and preventing property/equipment damage. WARNING Failure to follow any of WARNING is likely to result in grave consequences such as death or serious injury.
  • Page 5 IMPORTANT SAFETY INFORMATION CAUTION • Do not install the heat pump in a place where there is danger of exposure to flammable gas. If the gas builds up around the unit, it may catch fire. • Install drain piping according to the instructions of this manual. Inadequate piping may cause flooding. •...
  • Page 6 OUTDOOR TECHNICAL OVERVIEW 2U20EH2VHA 3U24EH2VHA 4U36EH2VHA 31-5000698 Rev. 0...
  • Page 7 OUTDOOR TECHNICAL OVERVIEW WIRING DIAGRAM - 2U20EH2VHA DC-FAN Base Pan Heater Reactor MOTOR 4-WAY VALVE CRANKCASE HEATER GRAY BL Y W B P1(L) FUSE FG Vsp Vcc CON9 F30A 250VAC CN11 P2(N) Electrolytic CON8 1 2 3 4 5 6 7 8...
  • Page 8 OUTDOOR TECHNICAL OVERVIEW WIRING DIAGRAM - 3U24EH2VHA DC-FAN MOTOR Base Pan Heater Reactor 4-WAY VALVE CRANKCASE HEATER GRAY BL Y W B P1(L) FUSE FG Vsp Vcc CON9 F30A 250VAC CN11 P2(N) Electrolytic CON8 1 2 3 4 5 6 7 8 CN15 Capacitor TO Module...
  • Page 9 OUTDOOR TECHNICAL OVERVIEW WIRING DIAGRAM - 4U36EH2VHA 4U36EH2VHA abbreviation Sensor DC FAN 4-WAY Tc: Condensing Temp. CRANKCASE BASE PAN MOTOR VALVE HEATER Ts: Compressor Suction HEATER Temp. BL Y W B Ta: Ambient Temp. Td: Compressor Discharge ACL(L1) ’ ’ Te: Defrosting Temp.
  • Page 10 Power input restrict invalid ---- ---- OFF* ---- ---- ---- ---- ---- Power input restrict valid ---- ---- ---- ---- ---- ---- ---- 2U20EH2VHA ---- ---- ---- ---- ---- 3U24EH2VHA ---- ---- ---- ---- ---- Factory use only ---- ---- ---- ----...
  • Page 11 OUTDOOR TECHNICAL OVERVIEW DIP SWITCH SETTINGS (cont) SW6 DIP Switch Settings Outdoor central control address settings Outdoor Central SW6-1 SW6-2 SW6-3 SW6-4 Control Address SW7 DIP Switch Settings Description SW7-1 SW7-2 SW7-3 SW7-4 SW7-5 SW7-6 SW7-7 SW7-8 USA energy efficiency test mode for High OFF* OFF* ----...
  • Page 12 OUTDOOR TECHNICAL OVERVIEW DIP SWITCH SETTINGS (cont) WJ26X25054 - Service Monitor Board DIP Switch Settings SW1 DIP Switch Settings Definition SW1-1 SW1-2 SW1-3 SW1-4 Factory default Forced heating Forced cooling Rated operation Time defrost valid: Defrost initiates if needed when the compressor has been on for 10 minutes continuously and 50 minutes cumulative.
  • Page 13 This function allows you the capability to adjust the temperature compensation offset of any indoor unit. The adjusted value is programmed into the EEPROM. IDU PCB part number Controls Needed Guide Series Reference Haier Controller IR Reciever Wired Controller 3X3 Cassette AL24LP2VHA 0151800208...
  • Page 14 OUTDOOR TECHNICAL OVERVIEW Special Functions – Temperature Compensation (cont) Chart 2 1. Remove power to the unit and unplug the wired controller from the indoor unit PCB. 2. Connect the infrared remote signal receiver to indoor unit PCB. 0151800106E = socket CN29 0151800267 = socket CN21 3.
  • Page 15 OUTDOOR TECHNICAL OVERVIEW REFRIGERATION DIAGRAMS 2U20EH2VHA Low pressure Suction temp. switch sensor 4-way valve coil: Comp- Refrigerant flow in cooling ressor Discharge temp. Refrigerant flow in heating sensor Accumulator separator Capillary tube Unit A gas pipe temp. sensor TC1 Ø2.7*Ø1.0*1400...
  • Page 16 OUTDOOR TECHNICAL OVERVIEW REFRIGERATION DIAGRAMS 4U36EH2VHA Low pressure Suction temp. 4-way valve coil: switch sensor Refrigerant flow in cooling Comp- ressor Refrigerant flow in heating Discharge temp. sensor Accumulator separator Capillary tube Unit A gas pipe temp. sensor Ø2.7*Ø1.0*1400 Indoor unit A High pressure switch Unit B gas pipe temp.
  • Page 17 OUTDOOR TECHNICAL OVERVIEW OPERATIONS Cooling Mode Sequence of Operation On a call for cooling, the indoor unit will send the room temperature and set-point requirement to the outdoor unit PCB via the data signal wire path. The data travels from the indoor unit to the outdoor unit via the wire located on terminal 3/C. The indoor louvers will open and the indoor fan motor will start.
  • Page 18 OUTDOOR TECHNICAL OVERVIEW OPERATIONS Cooling Mode Sequence of Operation (cont) Temperature Sensor Td Temperature Sensor Tc2 The temperature of the compressor discharge hot gas will The Liquid Pipe Sensor will monitor the temperature of the be monitored by the Discharge Temperature Sensor. If the refrigerant leaving the EEV.
  • Page 19 OUTDOOR TECHNICAL OVERVIEW OPERATIONS Defrost Cycle Sequence of Operation Multi: Beginning Fixed frequency Indicated FQY 60s Defrosting FQY 80 Hz E Soft startup Compressor Outdoor motor Send defrosting signal to indoor Auto 4-way valve 450-pulse 450-pulse 350-pulse(E) All EEVs Auto open angle Auto open angle All indoor motors ON Anti- cold air fun ction...
  • Page 20 OUTDOOR TECHNICAL OVERVIEW OPERATIONS Electronic Expansion Valve (EEV) Control Electronic characteristics Max. open angle 480 pulses Driving speed Open angle limitation of EEV Unit stop Max. open angle Thermostat OFF Min. open angle Cool/ dry 5 pulses 480 pulses 5 pulses 80 pulses Heat 5 pulses...
  • Page 21 OUTDOOR TECHNICAL OVERVIEW OPERATIONS Defrost Control Base Pan Heater Control Logic In the heating mode and along with the ambient sensor, the When the compressor starts in the heating mode, the defrost sensor monitors the temperature of the outdoor following conditions will apply: coil to determine if defrost is needed.
  • Page 22 OUTDOOR TECHNICAL OVERVIEW OPERATIONS High Current Protection The below table is the outdoor unit protection current and compressor current. Model Maximum current (I) Compressor current (CT) 2U20EH2VHA 12.5A 3U24EH2VHA 13.5 4U36EH2VHA If the temperature reaches 150 F(66 C) three times in one hour, the system will lock out.
  • Page 23 OUTDOOR TECHNICAL OVERVIEW OPERATIONS Low Pressure Protection With the compressor running, if the low pressure switch opens for 1 minute, the compressor will stop. If this condition occurs 3 times in an hour, the compressor will lock out and a low pressure error code will be displayed at the indoor unit.
  • Page 24 OUTDOOR TECHNICAL OVERVIEW OPERATIONS Oil Return in Cooling Mode: Oil Return Cycle Send oil return signal oil return begins oil return over When the compressor is operating at low load ref. eliminated conditions, or the operating frequency has Oil return frequency auto frequency been below 70Hz continuously for 4 hours, Low frequency...
  • Page 25 OUTDOOR TECHNICAL OVERVIEW SPECIAL FUNCTIONS Auto Restart When this is enabled, the following functions will automatically resumes after a power loss: • ON/OFF State, Mode of Operation, Fan Speed, Temperature Setpoint, Louver Swing settings. • If there was a timer set or the system was in Sleep mode, they will be canceled upon restart. Wired Controller: •...
  • Page 26 3. The total liquid piping length must be 4-way valve switching failure less than the max value. Loss of synchronism detection Outdoor Unit Std. Value Max Value Indoor thermal overload 2U20EH2VHA 30m/100ft. 50m/164ft. Indoor unit overload protection, heating mode only. 3U24EH2VHA 30m/100ft. 60m/197ft. Indoor coil frosted...
  • Page 27 OUTDOOR TECHNICAL OVERVIEW OUTDOOR UNIT ERROR CODES When the system generates an error code, it will be displayed on the Service Monitor Board, the number of flashes on the PCB, and also on the indoor unit display panel. Temperature Sensor Error Codes The easiest problems to solve will involve codes that are related to potential failure of temperature sensors.
  • Page 28 OUTDOOR TECHNICAL OVERVIEW OUTDOOR UNIT ERROR CODES Pressure-Related Error Codes To protect the compressor, the PCB has a low pressure switch connection at CN13, and a high pressure switch connection at CN12. Pressure Switch High Pressure Switch Error Code 42 & 43 Error Code 45 The low pressure switch will generate an Error Code 43 This code is indicating that system pressure is too low.
  • Page 29 OUTDOOR TECHNICAL OVERVIEW OUTDOOR UNIT ERROR CODES Error Codes Caused by Abnormal Refrigerant Circuit Conditions Error Code 8 Error Code 4 This code indicates the temperature of the compressor This code indicates the IPM is not communicating with the hot gas is too high. This error occurs after the PCB has PCB.
  • Page 30 OUTDOOR TECHNICAL OVERVIEW OUTDOOR UNIT ERROR CODES Error Codes Related to the IPM (cont) Error Code Related to Compressor, Outdoor Fan & 4-Way Valve Error Code 23 Error Code 9 This code indicates an IPM thermal overload. This error This code indicates the outdoor fan motor is not running. was generated by a temperature sensor located in the IPM The fault is detected very quickly by the PCB.
  • Page 31 OUTDOOR TECHNICAL OVERVIEW FLOWCHARTS Code disappears after [1] Outdoor EEPROM Malfunction power off/on again EEPROM communication error; EEPROM data check error (model ID, checksum, etc.); EEPROM data logic error (wider data range, wrong order, etc.) Check outdoor Possible causes: PCB, If faulty, •...
  • Page 32 OUTDOOR TECHNICAL OVERVIEW FLOWCHARTS [4] Communication abnormal between PCB and IPM Control board can not Is the compressor drive module communicate with the input power normal (Test the AC power supply voltage of the compressor driver module Adjust communication wire module’s power input ACL-ACN: for over 4 minutes normal value should between 196-...
  • Page 33 OUTDOOR TECHNICAL OVERVIEW FLOWCHARTS [8] Discharge temperature too high Reconnect Is sensor wiring firmly in place? protection Compressor discharge temperature over 115°C. Error clears within 3 minutes if temperature lowers below 115°C. Error Is sensor resistance status lock if it occurs 3 times in 1 hour. Replace pressure switch within range? Possible causes:...
  • Page 34 OUTDOOR TECHNICAL OVERVIEW FLOWCHARTS [10] Outdoor defrosting temp. sensor Te abnormal Is the sensor wiring Replace sensor firmly and correctly in [11] Suction temp.sensor Ts abnormal place? [12] Outdoor ambient temp. sensor Ta abnormal [13] Discharging temp. sensor Td abnormal Is the sensor Sensor temperature has been detected below or higher than resistance within...
  • Page 35 OUTDOOR TECHNICAL OVERVIEW FLOWCHARTS Is the sensor wiring correct Correct wiring [16] Lack of refrigerant or discharging pipe and firmly connected? blocked Repair leak and recharge Is the system leaking, or minutes after compressor start. Error status locks if it lacking refrigerant? refrigerant occurs 3 times in 1 hour.
  • Page 36 OUTDOOR TECHNICAL OVERVIEW FLOWCHARTS Correct power supply Is supply voltage normal? [18] Compressor motor desynchronizing Motor desynchronizing occurred. Caused by Is wire connection Correct the wiring overload, load sharply fluctuating, abnormal between power module according to diagram compressor current sensor circuit, or one of the and compressor correct? inverter gate drive signals is missing.
  • Page 37 OUTDOOR TECHNICAL OVERVIEW FLOWCHARTS [42] Open high pressure switch Power on High pressure switch: Switch circuit has been detected open for 30 seconds (after 3 minute of compressor run Short the high pressure time). Error locks if it occurs 3 times in 1 hour. switch terminal on the PCB.
  • Page 38 OUTDOOR TECHNICAL OVERVIEW FLOWCHARTS [44] Compressor motor Power off. Is pressure switch Reconnect wiring connection ok? desynchronizing Motor desynchronizing occurred. Caused by overload, load sharply fluctuating, Use multimeter to check the high abnormal compressor current sensor The pressure is bad, pressure switch.
  • Page 39 OUTDOOR TECHNICAL OVERVIEW COMPONENTS The outdoor unit features a variable speed, rotary type compressor that delivers refrigerant flow to up to 4 individual indoor units. The system uses R-410A refrigerant mixed with PVE oil, and is 208/230 VAC, 60 Hz, single phase. Compatible indoor units are High wall, Cassette, Ducted, and Console with remote control, cassette with either remote or wired control, and ducted with wired control only.
  • Page 40 OUTDOOR TECHNICAL OVERVIEW COMPONENTS Service Monitor Board (SMB) The SMB has important features including operational DIP switches, error code display, compressor speed, and diagnostic capabilities. The SMB is connected to the PCB via connections CN-2 and CN-3. The SW1 DIP switches are OFF (default position for normal operation).
  • Page 41 OUTDOOR TECHNICAL OVERVIEW COMPONENTS The PCB is connected via communication cables to the Inverter Power Module, Filter Board, and the Service Monitor Board. Voltage to operate the PCB is provided by the Power Filter Board on terminals ACN and ACL. When power is present, the Green LED will light.
  • Page 42 OUTDOOR TECHNICAL OVERVIEW COMPONENTS Power Filter Board (PFB) 2U & 3U The purpose of the PFB is to filter out potential electrical noise before it reaches the outdoor unit electronic circuits. All voltage to operate the outdoor unit circuits must pass through the PFB. A replaceable, 30A, 250V rated ceramic fuse protects the outdoor unit electronics.
  • Page 43 OUTDOOR TECHNICAL OVERVIEW TESTING Outdoor Fan Motor Check that the wiring and plug connections are in good condition. If the outdoor unit fan motor does not run, or the Service Monitor Board indicates an Outdoor Fan 310VDC error code of 09, check the following voltages at the motor connector on the outdoor Pins 1 - 3 unit PCB.
  • Page 44 OUTDOOR TECHNICAL OVERVIEW TESTING 4-Way Valve The 4-way valve will control the direction of hot gas discharge via an internal slide assembly. The valve has a line voltage solenoid that is energized in heat mode. The solenoid will direct the internal slide to send the hot gas to the indoor coil.
  • Page 45 OUTDOOR TECHNICAL OVERVIEW TESTING 4. All indoor fans will be set to HIGH fan speed. Variable Speed Compressor 5. EEV for Circuit A will open. All other EEV’s will close. 1. Begin by turning off power at the equipment disconnect 6.
  • Page 46 WALL MOUNT TECHNICAL OVERVIEW AW07EH2VHA AW09EH2VHA AW12EH2VHA AW18EH2VHA AW07LC2VHB AW09LC2VHB AW12LC2VHB AW18LC2VHB AW24LP2VHA 31-5000698 Rev. 0...
  • Page 47 WALL MOUNT TECHNICAL OVERVIEW INDOOR UNIT WIRING DIAGRAM NOTES: R: RED B: BLACK 1. The dotted parts are optional. W: WHITE BL: BLUE 2. The two pins of CN51 should Y: YELLOW BR: BROWN be shorted, when the second Y/G: YELLOW/GREEN channel (RC) of SW2 is selected.
  • Page 48 WALL MOUNT TECHNICAL OVERVIEW ERROR CODES The error codes that are displayed on the indoor units may vary from the outdoor unit codes. The information communicated by the error code will be the SAME for both indoor and outdoor units even though the numbers may differ. Indoor Display Outdoor LED Diagnosis...
  • Page 49 WALL MOUNT TECHNICAL OVERVIEW ERROR CODES The error codes that are displayed on the indoor units may vary from the outdoor unit codes. The information communicated by the error code will be the SAME for both indoor and outdoor units even though the numbers may differ. Indoor Display Outdoor LED Diagnosis...
  • Page 50 WALL MOUNT TECHNICAL OVERVIEW COMPONENTS The wall mounted units act as evaporator coils during cooling mode and condenser coils during heating mode. These units have gravity condensate drain systems. If a condensate pump is needed, it must be field provided and mounted external to the indoor unit.
  • Page 51 WALL MOUNT TECHNICAL OVERVIEW COMPONENTS Display The indoor unit has a display that communicates system mode, room temperature and diagnostic code information. The diagnostic code information shown on the indoor unit will NOT be the same code that is displayed on the outdoor unit.
  • Page 52 WALL MOUNT TECHNICAL OVERVIEW COMPONENTS Line voltage to power the indoor unit comes in on Terminal Block connections 1 and 2. Power connects from these terminal connections on the circuit board. If the board does not respond to commands and has no display, check for line voltage at these connections.
  • Page 53 WALL MOUNT TECHNICAL OVERVIEW TESTING 6. Open the 3 caps that cover the screws located behind the bottom of the louver. These caps flip up. Accessing Components/Removing Cover 1. To access components for service, first disconnect power to the outdoor unit. This will de-energize the indoor unit. 2.
  • Page 54 WALL MOUNT TECHNICAL OVERVIEW TESTING +310 VDC Black DC Ground Indoor Fan Motor Voltage Check White DC Motor +15 VDC If The Indoor Fan Motor Does Not Run: Yellow Signal 1. Remove the front cover and access the circuit board fan Blue Feedback motor connection.
  • Page 55 WALL MOUNT TECHNICAL OVERVIEW TESTING 6. Remove 6 screws that hold the motor bracket and 9. Unplug the motor from the circuit board. evaporator coil. 10. Lift and slide the motor away from the blower wheel. 7. Lift the evaporator coil and remove the motor bracket. 11.
  • Page 56 WALL MOUNT TECHNICAL OVERVIEW TESTING 3. Identify on the schematic drawing the inoperable louver motor and disconnect the plug from the circuit board. Testing Temperature Sensors (The up down louver motor is located on the right side of the indoor unit. The left right louver motor is located The easiest problems to solve will involve codes that are bottom center.
  • Page 57 COMPACT CASSETTE TECHNICAL OVERVIEW AB09SC2VHA AB12SC2VHA AB18SC2VHA 31-5000698 Rev. 0...
  • Page 58 COMPACT CASSETTE TECHNICAL OVERVIEW WIRING DIAGRAM & DIP SWITCH SETTINGS FLOAT ROOM DC FAN PIPING SWITCH TEMP. TEMP. ROOMCARD PANNEL SENSOR SENSOR PUMP CN21 CN19 87654321 87654321 FUSE CN11 T5A/250VAC CN16 CN13 REMOTE U-HOME CENTRAL UP/DOWN TO OUT DOOR R:RED B:BLACK W:WHITE Y/G:YELLOW/GREEN...
  • Page 59 COMPACT CASSETTE TECHNICAL OVERVIEW ERROR CODES The error codes that are displayed on the indoor units may vary from the outdoor unit codes. The information communicated by the error code will be the SAME for both indoor and outdoor units even though the numbers may differ. Indoor Indoor Outdoor...
  • Page 60 COMPACT CASSETTE TECHNICAL OVERVIEW ERROR CODES The error codes that are displayed on the indoor units may vary from the outdoor unit codes. The information communicated by the error code will be the SAME for both indoor and outdoor units even though the numbers may differ. Indoor Indoor Outdoor...
  • Page 61 COMPACT CASSETTE TECHNICAL OVERVIEW COMPONENTS The indoor cassette type units act as evaporator coils during cooling mode and condenser coils during heating mode. These units have a built in condensate pump with an associated condensate level switch. The condensate pump is capable of lifting water out of the indoor unit.
  • Page 62 COMPACT CASSETTE TECHNICAL OVERVIEW COMPONENTS The Blower Assembly The blower assembly consists of a plastic blower wheel that is connected to a PSC indoor blower motor. A set screw holds the blower wheel to the blower motor. The indoor blower motor is a Multi Speed Fan Motor that is connected to the indoor unit control board. The wiring from the motor to indoor board consists of 4 wires connected to pins common, low , medium and high speeds.
  • Page 63 COMPACT CASSETTE TECHNICAL OVERVIEW COMPONENTS N Terminal CN19 Float Switch CN6 Fan Motor L Terminal CN21 Louver Panel CN9 Condensate Pump Communication Terminal CN11 Wired Remote CN4 U-HOME 3.15A 250V Fuse DIP Switches CN13 Remote Central CN3 Pipe/Room Temp Sensors CN35 Stepper Motor CN1 Room Card The indoor unit circuit board controls the switching...
  • Page 64 COMPACT CASSETTE TECHNICAL OVERVIEW TESTING Accessing the Blower Motor and Condensate Pump Removing Fan Motor 1. Disconnect power to the outdoor unit. 1. Remove holding nut from fan blade. 2. Remove the louver assembly. 2. Fan blade will slide off motor shaft. 3.
  • Page 65 COMPACT CASSETTE TECHNICAL OVERVIEW TESTING Indoor Fan Motor Test Procedure If the indoor fan motor does not run: 1. Disconnect power to the system. 2. Remove the return air cover and access the circuit board connection. 3. Reset power and turn the remote control fan command to Fan On mode. Motor Test: +310 VDC Black...
  • Page 66 COMPACT CASSETTE TECHNICAL OVERVIEW TESTING 4. Use an Ohmmeter to test the electrical continuity of Testing Louver Motors the louver motor windings. The proper resistance for If the louver does not operate with command from the each winding can be found in this table. If the motor remote control, either the indoor board is bad, or the winding resistance is erratic or shows open, the motor is louver motor is defective.
  • Page 67 COMPACT CASSETTE TECHNICAL OVERVIEW TESTING Test Condensate Pump and Associated Float Switch If the internal condensate pump does not operate, the pump may be bad or the float switch may be defective. Perform the following test: 1. Access the electrical control box. 2.
  • Page 68 LARGE CASSETTE TECHNICAL OVERVIEW AL24LP2VHA 31-5000698 Rev. 0...
  • Page 69 LARGE CASSETTE TECHNICAL OVERVIEW WIRING DIAGRAM DC FAN MOTOR PIPING ROOM CARD FRESH AIR MOTOR / TEMP FLOAT ROOM SENSOR EXTERNAL ALARM OUTPUT SWITCH TEMP (FUNCTION IN FUTURE ) SENSOR ( Contact rating_230VAC,3A) CN10 DRAIN WIRED PUMP CONTROLLER CN19 CN11 ELECTRIC HEATING TERMINAL RATING_230VAC,3A 87654321...
  • Page 70 LARGE CASSETTE TECHNICAL OVERVIEW DIP SWITCH SETTINGS BM1 DIP Switch Settings Capacity Room Card Running Mode Unit Type Description SW1-1 SW1-2 SW1-3 SW1-4 SW1-5 SW1-6 SW1-7 SW1-8 Capacity: 24kBTU(7.1kW) Capacity: 30kBTU(9.0kW) Capacity: 35kBTU(10.5kW) Capacity: 42kBTU(12.5kW) Capacity: 48kBTU(14.0kW_ Room card invalid(default) Room card valid Heat pump(default) Cooling only...
  • Page 71 LARGE CASSETTE TECHNICAL OVERVIEW ERROR CODES The error codes that are displayed on the indoor units may vary from the outdoor unit codes. The information communicated by the error code will be the SAME for both indoor and outdoor units even though the numbers may differ. Indoor Indoor Panel...
  • Page 72 LARGE CASSETTE TECHNICAL OVERVIEW ERROR CODES The error codes that are displayed on the indoor units may vary from the outdoor unit codes. The information communicated by the error code will be the SAME for both indoor and outdoor units even though the numbers may differ. Indoor Indoor Panel...
  • Page 73 LARGE CASSETTE TECHNICAL OVERVIEW COMPONENTS The indoor cassette type units act as evaporator coils during cooling mode and condenser coils during heating mode. These units have a built in condensate pump with an associated condensate level switch. The condensate pump is capable of lifting water out of the indoor unit.
  • Page 74 LARGE CASSETTE TECHNICAL OVERVIEW COMPONENTS Display The indoor unit has a display that communicates system mode. The indoor unit does not display temperatures or diagnostic codes. When a wired controller is used, this information is displayed on the wired controller. It is recommended to use a wired controller with the cassette unit.
  • Page 75 LARGE CASSETTE TECHNICAL OVERVIEW COMPONENTS Cassette Unit Indoor Circuit Board Power CN19 Float Switch CN6 Fan Motor Communication Terminal CN11 Wired Remote CN9 Condensate Pump 3.15A 250V Fuse DIP Switches CN14 Panel Connection CN3 Pipe/Room Temp Sensors CN36 Stepper Motor The indoor unit circuit board controls the switching Power Indicator will be lit.
  • Page 76 LARGE CASSETTE TECHNICAL OVERVIEW TESTING Accessing the Blower Motor and Condensate Removing Fan Motor Pump 1. Remove holding nut from fan blade. 1. Disconnect power to the outdoor unit. 2. Remove the louver assembly. 2. Fan blade will slide off motor shaft. 3.
  • Page 77 LARGE CASSETTE TECHNICAL OVERVIEW TESTING Indoor Fan Motor Test Procedure If the indoor fan motor does not run: 1. Disconnect power to the system. 2. Remove the return air cover and access the circuit board fan motor connection. 3. Reset power and turn the remote control fan command to Fan On mode. Motor Test: 1.
  • Page 78 LARGE CASSETTE TECHNICAL OVERVIEW TESTING 4. Use an Ohmmeter to test the electrical continuity of the louver motor windings. The proper resistance for Testing Louver Motors each winding can be found in this table. If the motor winding resistance is erratic or shows open, the motor If the louver does not operate with command from the is defective.
  • Page 79 LARGE CASSETTE TECHNICAL OVERVIEW TESTING Test Condensate Pump and Float Switch If the internal condensate pump does not operate, the pump may be bad or the float switch may be defective. Perform the following test: 1. Access the electrical control box. 2.
  • Page 80 SLIM DUCT TECHNICAL OVERVIEW AD07SL2VHB AD09SL2VHB AD12SL2VHB AD18SL2VHB 31-5000698 Rev. 0...
  • Page 81 SLIM DUCT TECHNICAL OVERVIEW WIRING DIAGRAM & DIP SWITCH SETTINGS ROOM FLOAT SWITCH TEMP. PIPING TEMP. SENSOR REMOTE SENSOR U-HOME CENTRAL PANNEL CONTROLLER ROOMCARD CN13 CN36 CN18 CN19 REMOTE RECEIVER T5A/250VAC FUSE CN22 87654321 4321 CN23 LEFT/RIGHT SWING MOTOR HEAT UP/DOWN SWING MOTOR PUMP...
  • Page 82 SLIM DUCT TECHNICAL OVERVIEW ERROR CODES The error codes that are displayed on the indoor units may vary from the outdoor unit codes. The information Indoor Indoor Outdoor Diagnosis LED4 LED3 Outdoor EEPROM failure IPM overcurrent or short circuit Compressor over current during deceleration Communication failure between the IPM and outdoor PCB Module operated overload (compressor overload protection) Module low or high voltage...
  • Page 83 SLIM DUCT TECHNICAL OVERVIEW ERROR CODES The error codes that are displayed on the indoor units may vary from the outdoor unit codes. The information Indoor Indoor Outdoor Diagnosis LED4 LED3 Liquid pipe sensor failure: Circuit C Liquid pipe sensor failure: Circuit D Gas pipe sensor failure: Circuit A Gas pipe sensor failure: Circuit B Gas pipe sensor failure: Circuit C...
  • Page 84 SLIM DUCT TECHNICAL OVERVIEW COMPONENTS The Slim Duct Indoor Unit will act as evaporator coils during cooling mode and condenser coils during heating mode. This unit can operate with a motorized supply air louver or it can have a LIMITED amount of ducting added to the unit’s return and supply air duct connection flanges.
  • Page 85 SLIM DUCT TECHNICAL OVERVIEW COMPONENTS Piping Temperature Sensor The Piping Temperature Sensor senses indoor coil temperature in the cooling mode and in the heating mode. This sensor is used for Anti Freezing and Anti Cold Blow cycles. The sensor also provides critical temperature information to the ECU that may be used in frequency adjustments.
  • Page 86 SLIM DUCT TECHNICAL OVERVIEW COMPONENTS The Indoor Unit Circuit Board communicates with the outdoor unit ECU via a connection at Terminal Block screw 3. The data pulse that sends the communication information can be measured with a voltmeter placed to DCV range. From the ground connection at the Terminal Block to the Number 3 screw connection, the voltage should pulse up and down when data is being transmitted.
  • Page 87 SLIM DUCT TECHNICAL OVERVIEW COMPONENTS This control board has control over the fan louver movement, manual fan blower control, indoor coil temperature and indoor air temperature sensing functions. All operational decisions are controlled by the OUTDOOR UNIT ECU. The control board has a replaceable 5A 250V fuse that protects against excessive current. If power is present at the board but the board does not work, check for continuity through the fuse.
  • Page 88 SLIM DUCT TECHNICAL OVERVIEW TESTING 3. The pump should start. 4. If the pump does not start, check for voltage at the Test Condensate Pump and Float Switch control board pump connection. There should be The unit has a built-in condensate pump and water level 230 Volts AC to the pump.
  • Page 89 SLIM DUCT TECHNICAL OVERVIEW TESTING Testing Temperature Sensors Indoor Fan Motor Voltage Check The easiest problems to solve will involve codes that If The Indoor Fan Motor Does Not Run: are related to potential failure of temperature sensors. 1. Remove the front cover and access the fan motor Common problems may include loose connections, open circuit board connection.
  • Page 90 MID-STATIC DUCTED TECHNICAL OVERVIEW USYM09UCDSA USYM12UCDSA USYM18UCDSA USYM24UCDSA 31-5000698 Rev. 0...
  • Page 91 MID-STATIC DUCTED TECHNICAL OVERVIEW WIRING DIAGRAM INFRARED SIGNAL RECEIVER DC FAN MOTOR YCJ-A002 REMOTE CENTRAL RELAY FOR AUXILIARY CONTROL (dry contact port,contact ADAPTOR rating 230VAC,3A CN21 WiFi MODULE LED4 TO RJ 45 device LED3 ROOM CARD 1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 8 SW01 SW03 AC PUMP...
  • Page 92 MID-STATIC DUCTED TECHNICAL OVERVIEW DIP SWITCH SETTINGS SW1 DIP Switch Settings Description SW1-1 SW1-2 SW1-3 SW1-4 SW1-5 SW1-6 SW1-7 SW1-8 Capacity: 9000btu/h Capacity: 12000btu/h Capacity: 18000btu/h Capacity: 24000btu/h Room card invalid OFF* Room card valid Heat pump OFF* Cooling only Fresh air valid OFF* External alarm output...
  • Page 93 MID-STATIC DUCTED TECHNICAL OVERVIEW ERROR CODES The error codes that are displayed on the indoor units may vary from the outdoor unit codes. The information Indoor Indoor Outdoor Diagnosis LED4 LED3 Outdoor EEPROM failure IPM overcurrent or short circuit Compressor over current during deceleration Communication failure between the IPM and outdoor PCB Module operated overload (compressor overload protection) Module low or high voltage...
  • Page 94 MID-STATIC DUCTED TECHNICAL OVERVIEW ERROR CODES The error codes that are displayed on the indoor units may vary from the outdoor unit codes. The information Indoor Indoor Outdoor Diagnosis LED4 LED3 Liquid pipe sensor failure: Circuit C Liquid pipe sensor failure: Circuit D Gas pipe sensor failure: Circuit A Gas pipe sensor failure: Circuit B Gas pipe sensor failure: Circuit C...
  • Page 95 MID-STATIC DUCTED TECHNICAL OVERVIEW COMPONENTS The Mid-Static Ducted Indoor Unit will act as evaporator coils during cooling mode and condenser coils during heating mode. This unit can operate with a motorized supply air louver or it can have a LIMITED amount of ducting added to the unit’s return and supply air duct connection flanges.
  • Page 96 MID-STATIC DUCTED TECHNICAL OVERVIEW COMPONENTS Terminal Block Power to operate the indoor unit comes from the electrical line voltage terminal block at the outdoor unit. The wiring includes 4 wires, 1, 2, 3 and ground. Wires 1 and 3 complete the data path. These wires should always be 14 gauge AWG Stranded type wire.
  • Page 97 MID-STATIC DUCTED TECHNICAL OVERVIEW COMPONENTS Indoor Unit Circuit Board The indoor unit circuit board controls the switching functions of the indoor unit. All control decisions are made by the outdoor unit ECU. The indoor board has some limited diagnostic capability which will be covered in this manual. CN17-GEA3 wifi module socket CN6-DC fan motor socket CN10-Fresh air link/E.A.O socket...
  • Page 98 MID-STATIC DUCTED TECHNICAL OVERVIEW COMPONENTS Fresh Air Function In Heating mode The fresh air output will maintain a 20 minutes ON, 20 When there is fresh air signal received by the Indoor Unit minutes OFF cycle after the compressor starts. PCB (the fresh air signal can be sent by infrared remote controller or wired controller), the Normal fresh air function This cycle will be active until one of the following occurs:...
  • Page 99 MID-STATIC DUCTED TECHNICAL OVERVIEW TESTING Test Condensate Pump and Associated Float Switch Testing Temperature Sensors If the internal condensate pump does not operate, the The easiest problems to solve will involve codes that pump may be bad or the float switch may be defective. are related to potential failure of temperature sensors.
  • Page 100 MID-STATIC DUCTED TECHNICAL OVERVIEW TESTING Testing Communication Circuit Indoor Fan Motor Voltage Check If an Error E7 occurs, perform the following test to If The Indoor Fan Motor Does Not Run: determine if the indoor control board is functioning 1. Remove the front cover and access the fan motor circuit properly to send data to the outdoor unit.
  • Page 101 MID-STATIC DUCTED TECHNICAL OVERVIEW TESTING Static Pressure Charts USYM09UCDSA High(cfm) Med(cfm) Low(cfm) Quiet(cfm) 0.15 0.28 0.36 0.44 0.48 0.52 Sta c pressure (in.wc.) 555.0 USYM12UCDSA 505.0 455.0 405.0 High(cfm) 355.0 Med(cfm) 305.0 Low(cfm) 255.0 205.0 Quiet(cfm) 0.10 0.15 0.20 0.28 0.36 0.40 0.44...
  • Page 102 MID-STATIC DUCTED TECHNICAL OVERVIEW TESTING Board Replacement within the air inlet 1. Remove the ambient sensor. 3. Remove the 4 screws holding the pump in place. 2. Unplug all connectors from the board. 3. Remove the 2 board mounting screws and remove the board.
  • Page 103 MID-STATIC DUCTED TECHNICAL OVERVIEW TESTING Removing Fan Motor 7. Remove the screws holding the blower housing to the 1. Remove control board cover. unit, 4 on each housing. 2. Unplug motor wires. 8. Support the motor (2 people may be required at this time).
  • Page 104 MEDIUM STATIC DUCTED (PRO SERIES) TECHNICAL OVERVIEW AM24LP2VHA 31-5000698 Rev. 0...
  • Page 105 MEDIUM STATIC DUCTED (PRO SERIES) TECHNICAL OVERVIEW WIRING DIAGRAM 31-5000698 Rev. 0...
  • Page 106 MEDIUM STATIC DUCTED (PRO SERIES) TECHNICAL OVERVIEW DIP SWITCH SETTINGS Description SW1-1 SW1-2 SW1-3 SW1-4 SW1-5 SW1-6 SW1-7 SW1-8 AM24LP2VHA Room card invalid(default) Room card valid Cool and heat(default) Cool only External alarm output(default) Fresh air Without filter clean remind (default) With filter clean remind ESP DUCT ( USA)
  • Page 107 MEDIUM STATIC DUCTED (PRO SERIES) TECHNICAL OVERVIEW ERROR CODES The error codes that are displayed on the indoor units may vary from the outdoor unit codes. The information communicated by the error code will be the SAME for both indoor and outdoor units even though the numbers may differ. Indoor Indoor Outdoor...
  • Page 108 MEDIUM STATIC DUCTED (PRO SERIES) TECHNICAL OVERVIEW ERROR CODES The error codes that are displayed on the indoor units may vary from the outdoor unit codes. The information communicated by the error code will be the SAME for both indoor and outdoor units even though the numbers may differ. Indoor Indoor Outdoor...
  • Page 109 MEDIUM STATIC DUCTED (PRO SERIES) TECHNICAL OVERVIEW COMPONENTS The Medium Static Ducted Indoor Unit will act as evaporator coils during cooling mode and condenser coils during heating mode. This unit can operate with a motorized supply air louver or it can have a LIMITED amount of ducting added to the unit’s return and supply air duct connection flanges.
  • Page 110 MEDIUM STATIC DUCTED (PRO SERIES) TECHNICAL OVERVIEW COMPONENTS Piping Temperature Sensor The Piping Temperature Sensor senses indoor coil temperature in the cooling mode and in the heating mode. This sensor is used for Anti Freezing and Anti Cold Blow cycles. The sensor also provides critical temperature information to the ECU that may be used in frequency adjustments.
  • Page 111 MEDIUM STATIC DUCTED (PRO SERIES) TECHNICAL OVERVIEW COMPONENTS The Indoor Unit Circuit Board communicates with the outdoor unit ECU via a connection at Terminal Block screw 3. The data pulse that sends the communication information can be measured with a voltmeter placed to DCV range. From the ground connection at the Terminal Block to the Number 3 screw connection, the voltage should pulse up and down when data is being transmitted.
  • Page 112 MEDIUM STATIC DUCTED (PRO SERIES) TECHNICAL OVERVIEW TESTING Test Condensate Pump and Float Switch 3. The pump should start. The unit has a built-in condensate pump and water level 4. If the pump does not start, check for voltage at the safety switch.
  • Page 113 MEDIUM STATIC DUCTED (PRO SERIES) TECHNICAL OVERVIEW TESTING Testing Temperature Sensors Indoor Fan Motor Voltage Check The easiest problems to solve will involve codes that If The Indoor Fan Motor Does Not Run: are related to potential failure of temperature sensors. 1.
  • Page 114 CONSOLE TECHNICAL OVERVIEW USYF09UCDWA USYF12UCDWA USYF18UCDWA 31-5000698 Rev. 0...
  • Page 115 CONSOLE TECHNICAL OVERVIEW WIRING DIAGRAM / DIP SWITCH SETTINGS CN16 CN17 CN31 CN16-1 Swing motor for lower louver CN22(22-1) Swing motor Main control board for upper louver L2 L1 CN10 To RJ45 DEVICE To Outdoor Unit DIP switches factory default setting SW3-1 SW3-2 SW3-3...
  • Page 116 CONSOLE TECHNICAL OVERVIEW ERROR CODES The error codes that are displayed on the indoor units may vary from the outdoor unit codes. The information communicated by the error code will be the SAME for both indoor and outdoor units even though the numbers may differ. Indoor Outdoor LED Diagnosis...
  • Page 117 CONSOLE TECHNICAL OVERVIEW ERROR CODES The error codes that are displayed on the indoor units may vary from the outdoor unit codes. The information communicated by the error code will be the SAME for both indoor and outdoor units even though the numbers may differ. Indoor Outdoor LED Diagnosis...
  • Page 118 CONSOLE TECHNICAL OVERVIEW COMPONENTS The indoor console unit functions as an evaporator coil during cooling mode, and as a condensing coil during heat mode. Condensate is collected by a drain pan below the coil and condensate is drained directly to the outdoor or to a secondary condensate pump via the provided condensate drain line.
  • Page 119 CONSOLE TECHNICAL OVERVIEW COMPONENTS CN31- Display SW2-Damper switch CN35- Lower damper motor CN3-Temperature sensor socket (Tr: ROOM SENSOR, Tp:PIPE SENSOR) CN6-DC fan motor CN17-WiFi module Power supply RJ45 adapter board CN20-Diagnostic port CN22- Optional wired controller The indoor unit circuit board controls the switching functions of the indoor unit. All control decisions are made by the outdoor unit ECU.
  • Page 120 CONSOLE TECHNICAL OVERVIEW TESTING Removing the Filter Cover & Filter 3. Unplug the three connectors for the fan motor, upper louver and bottom damper. 1. Slide the side latches up to unlock the cover and pull forward about an inch then lift up. 4.
  • Page 121 CONSOLE TECHNICAL OVERVIEW TESTING 3. Take note of connection location and carefully remove Replace Fan Motor each connector. 1. Remove filter cover, front panel, control box, upper 4. Remove the 2 screws mounting the board in the box. louver and bottom damper. They in diagonal corners from each other.
  • Page 122 CONSOLE TECHNICAL OVERVIEW TESTING 5. Remove the four screws holding on the fan inlet faring. Indoor Fan Motor Test Procedure If the indoor fan motor does not run: 1. Disconnect power to the system. 2. Remove the return air cover and access the fan motor circuit board connection.
  • Page 123 CONSOLE TECHNICAL OVERVIEW TESTING Testing Temperature Sensors Testing Louver Motors The easiest problems to solve will involve codes that If the louver does not operate with command from the are related to potential failure of temperature sensors. remote control, either the indoor board is bad, or the louver Common problems may include loose connections, open motor is defective.
  • Page 124 CONSOLE TECHNICAL OVERVIEW TESTING Testing Communication Circuit If an Error E7 occurs, perform the following test to determine if the indoor control board is functioning properly to send data to the outdoor unit. Perform this test with the unit powered and all wiring connected between indoor and outdoor unit.
  • Page 125 SPECIFICATIONS OUTDOOR UNITS Compressor Type: 2 Zones 3 Zones 4 Zones DC Inverter Driven Rotary Voltage/Cycle/Phase: 208-230/60/1 Operating Range ( Cooling Heating 2U20EH2VHA 3U24EH2VHA 4U36EH2VHA Rated Capacity Btu/hr 18,100 22,000 34,000 Cooling Capacity Range Btu/hr 7000-20000 6000-23600 6000-38000 Non-Ducted Rated Power Input W...
  • Page 126 SPECIFICATIONS HIGHWALL INDOOR AW07EH2VHA AW09EH2VHA AW12EH2VHA AW18EH2VHA Rated Cooling Capacity Btu/hr 7,000 9,000 12,000 19,000 Rated Heating Capacity Btu/hr 10,000 12,000 16,500 20,400 Voltage, Cycle, Phase V/Hz/- 208-230/60/1 208-230/60/1 208-230/60/1 208-230/60/1 420/360/300/240/180 470/410/350/290/230 440/410/380/311/260 710/650/560/440/410 (Turbo/H/M/L/Quiet) Indoor Sound dB 42/39/37/28/23 42/39/37/28/23 42/39/37/28/23 49/47/42/36/34...
  • Page 127 SPECIFICATIONS CASSETTE INDOOR AB09SC2VH(-) AB12SC2VH(-) AB18SC2VH(-) AL24LP2VH(-) Rated Cooling Capacity Btu/hr 9,000 12,000 18,000 24200 Rated Heating Capacity Btu/hr 10,000 13,000 19,000 27300 Voltage, Cycle, Phase V/Hz/- 208-230/60/1 208-230/60/1 208-230/60/1 208-230/60/1 410/365/305/265/205 410/365/305/265/205 470/410/365/295/252 740/630/480/400 (Turbo/H/M/L/Quiet) Indoor Sound dB 42/40/36/32/25 42/40/36/32/25 45/42/40/36/32 38/35/32/29...
  • Page 128 Product (“Defective Parts”) for a period of 5 years from the Date of From the date of the Purchase. Haier will provide new or refurbished parts, or a replacement for all or part of the unit, at original purchase its sole discretion, to your licensed HVAC technician installer.
  • Page 129 Canada. This warranty it provided by GE Appliances a Haier company, Louisville, KY 40225. ATTACHMENT 1 The “Product” is defined as Haier brand Ductless Split Units. The “Product” contains 2 sub-categories of goods: “Indoor and Outdoor Products” and “Selected Installation Products,” which are further defined below: “Indoor and Outdoor Products” can further be identified by the following model number descriptions: 1U*, 2U*, 3U*, 4U*, AB*, AD*, AL*, AM*, AW*, AF*, MVA* MVH* “Selected Installation Products,”...
  • Page 130 MATCHING TABLES 2U18MS2VHB / 2U20EH2VHA 4U36MS2VHB/ 4U36EH2VHA Combinations Combinations Required Required Total Adapter Port B Port A Total Capacity Port D Port C Port B Port A Adapter Capacity 1/4" x 3/8" 1/4" x 3/8" 1/4" x 1/2" 1/4" x 3/8" 1/4" x 3/8" 1/4" x 3/8"...
  • Page 131 NOTES 31-5000698 Rev. 0...
  • Page 132 MASTER ERROR CODE CHART HIGHWALL CONSOLE COMPACT CASSETTE Panel LED Flash or Outdoor Outdoor Outdoor ID PCB LED Flash Multi- Single- Pro-Series Digital Digital Zone LED Zone FAULT DESCRIPTION Yellow Timer Green Run LED Display Display Display Display LED1 Flash LED (PCB LED (PCB (CAC)
  • Page 133 MASTER ERROR CODE CHART LARGE CASSETTE DUCTED WIRED CONTROLLER Panel LED Flash or MID-STATIC HIGH STATIC SLIM DUCT ID PCB LED Flash DUCT (MSP) Panel YRE-17A Display YRE-16B Yellow Timer QACT17A Green Run LED LED4 LED3 LED4 LED3 (PB*****) LED (PCB LED4 LED3 (PCB LED1)
  • Page 134 MASTER ERROR CODE CHART HIGHWALL CONSOLE COMPACT CASSETTE Panel LED Flash or Outdoor Outdoor Outdoor ID PCB LED Flash Multi- Single- Pro-Series Digital Digital Zone LED Zone LED1 FAULT DESCRIPTION Yellow Timer Green Run LED Display Display Display Display Flash LED (PCB LED (PCB (CAC)
  • Page 135 MASTER ERROR CODE CHART LARGE CASSETTE DUCTED WIRED CONTROLLER Panel LED Flash or MID-STATIC HIGH STATIC SLIM DUCT ID PCB LED Flash DUCT (MSP) Panel YRE-17A Display YRE-16B Yellow Timer QACT17A Green Run LED LED4 LED3 LED4 LED3 (PB*****) LED (PCB LED4 LED3 (PCB LED1)
  • Page 136 FORMULAS & EQUATIONS PSYCHROMETRIC CHART Conversions: • CFM=The fan CFM (Airflow in Cubic Feet per Minute) 1ºF = 0.56ºC, 1ºC = 1.8ºF, ºF = (ºC x 1.8) + 32, plotted on the fan tables, or measured at several points in ºC = (ºF - 32) / 1.8, BTU/h = Watts x 3.412 = kWh x 3412 the system.
  • Page 137 RESISTANCE CHART °F °C SENSORS SENSORS SENSORS °F °C SENSORS SENSORS SENSORS °F °C SENSORS SENSORS SENSORS 147.95 513.115 12061.74 82.4 8.85 20.003 442.35 188.6 1.14 38.85 -20.2 139.56 478.894 11267.87 84.2 8.50 19.104 421.77 190.4 1.11 37.50 -18.4 131.70 447.408 10531.37 8.16...
  • Page 138 SENSOR DEFINITIONS Abbr. Type Abbr. Type Temperature of outdoor ambient Temperature of indoor ambient Temperature of outdoor condenser Temperature of indoor condenser Temperature of outdoor discharge Toci Hot Gas Leaving the 4-Way Valve Temperature of outdoor defrost EEV Liquid Sensor Temperature of outdoor suction EEV Gas Sensor Temperature of compressor driver module...
  • Page 139 RESISTANCE VALUES Highwall Horizontal Louver Motor Highwall Vertical Louver Motor Orange Yellow Pink Blue Grey Yellow Orange Blue Grey White Orange Yellow Yellow Orange Pink Blue Blue Grey Grey Highwall Horizontal Louver Motor (FlexFit) Highwall Vertical Louver Motor (FlexFit) Blue Violet Yellow Orange...
  • Page 140 COMPONENT RATINGS 4-Way Valve Ohms 2.1K 208-230 Basepan Heater Ohms 0.28K - 0.379K 208-230 Fan Motors VDC Outputs to DC Fan Motor (VDC) PIN # RED Probe Black Probe Value PIN # Color Abbr. Blue Revolution Pulse Output 300~380VDC Yellow Speed Control Voltage Input Blank Blank...
  • Page 141 31-5000698 Rev. 0...
  • Page 142 31-5000698 Rev. 0...

This manual is also suitable for:

3u24eh2vha4u36eh2vhaAw07eh2vhaAw09eh2vhaAw12eh2vhaAw18eh2vha ... Show all