Ecoer EODA18H-2436 Service Manual
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Ecoer EODA18H-2436 Service Manual

Esi(ultra) unitary system
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ESI(Ultra) Service Manual
Manufacturer reserves the right to change specifications or designs without notice.
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Service Manual
1. General Information------------------------------------
Contents
2. ESI(Ultra) Unitary System---------------------------
2.1 Refrigerant Circuit----------------------------------
2.2 Function and Control------------------------------
2.3 Field Setting-----------------------------------------
3. Troubleshooting---------------------------------------
4. Appendix------------------------------------------------
4.1 Sensor Characteristics-------------------------------
4.2 Wiring Diagram-------------------------------------
www.ecoer.com
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3
3
7
17
25
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09.2018

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  • Page 1: Service Manual

    ESI(Ultra) Service Manual www.ecoer.com 1/62 ESI(Ultra) Unitary System Service Manual 1. General Information------------------------------------ Contents 2. ESI(Ultra) Unitary System--------------------------- 2.1 Refrigerant Circuit---------------------------------- 2.2 Function and Control------------------------------ 2.3 Field Setting----------------------------------------- 3. Troubleshooting--------------------------------------- 4. Appendix------------------------------------------------ 4.1 Sensor Characteristics------------------------------- 4.2 Wiring Diagram------------------------------------- Manufacturer reserves the right to change specifications or designs without notice.

  • Page 2: General Information

    ESI(Ultra) Service Manual www.ecoer.com 2/62 1 General Information 4860 Condensing Unit Brand E: Ecoer Product Series OD: Outdoor Condensing Unit Model Letters A: 208/230V-1Ph-60Hz SEER 18: 18SEER Series Type H: Heat Pump C: Cooling only (Dial SW1_3 to ON) Capacity 2436: up to 3Ton;...

  • Page 3: Esi(Ultra) Unitary System

    ESI(Ultra) Service Manual www.ecoer.com 3/62 2 ESI(Ultra) Unitary System 2.1 Refrigerant Circuit 2.1.1 Functional Parts Layout of Condensing Units High Pressure Low Pressure Inverter Fan Sensor(HP) Sensor(LP) Fan Blade Inductance Noise Filter Heat Exchanger Accumulator(ACC) Inverter Compressor(INV) 4-Way Valve(ST1) Strainer...
  • Page 4 ESI(Ultra) Service Manual www.ecoer.com 4/62 High Pressure Low Pressure Sensor(HP) Sensor(LP) Inverter Fan(FAN) Heat Fan Blade Exchanger Inductance Noise Filter Main Control Board(PCB) Accumulator(ACC) Electronic Expansion 4-Way Valve(ST1) Lower Side Plate Gauge Port Strainer Valve(EEV) Inverter Compressor(INV) Liquid/Gas Service Valve...
  • Page 5 ESI(Ultra) Service Manual www.ecoer.com 5/62 2.1.2 Major Components Functions and Refrigerant Circuits Diagram Liquid Service Valve Heat Exchanger Gas Service Valve Gauge Port Adjusts refrigerant flow rate by changing the frequency(RPS) based Name Symbol Function Inverter compressor on objective pressure.
  • Page 6 ESI(Ultra) Service Manual www.ecoer.com 6/62 2.1.3 Refrigerant Flow of Each Operation Mode Liquid Service Valve Heat Exchanger Heat Exchanger Gas Service Valve Gauge Port Strainer High pressure Gas High pressure Liquid Low pressure Gas Low pressure Mix. Cooling Operation (including defrost operation and cooling oil return)

  • Page 7: Function And Control

    ESI(Ultra) Service Manual www.ecoer.com 7/62 2.2 Function and Control 2.2.1 Operation Mode After 1 minute Operation in stop mode Thermostat ON (Y=ON) • Thermostat OFF Pressure equalizing Restart standby (Y=OFF) prior to start-up (compressor stops) • O signal change MAX. 6 minutes...

  • Page 8: Basic Control

    The high pressure related to ambient temperature or running time is lower than specific value. • Ecoer offers three defrost setting options(n04) designed for different humidity areas. Manual • defrost can be chosen from n08 setting . For more details, refer to field setting section.
  • Page 9 AUTO charge mode locks the compressor frequency in cooling. The LED will display the refrigerant coefficient if both the liquid line sub-cooling and compressor suction superheat of ESI system are proper. To keep the best Ecoer Smart Inverter(ESI) systems’ performance and reliability, the following requirements should be followed in cooling.

  • Page 10: Fan Control

    ESI(Ultra) Service Manual www.ecoer.com 10/62 2.2.2.5 Compressor control Standby PI control MAX 6 minutes for pressure Depending on the load of the space. equalization Start-up control Directive control Pressure differential control Fixed speed MAX time (cooling) ≤ 10 minutes •...

  • Page 11: Silent Mode

    ESI(Ultra) Service Manual www.ecoer.com 11/62 Standby after 2.2.2.7 Electronic expansion valve(EEV) control PI control getting start signal Cooling: 360pls→480pls Cooling: 480pls Heating: 360pls→0pls Heating: Depending on the compressor • • discharge superheat. • • Start-up control Directive control Cooling: 480pls...

  • Page 12: High Pressure Protection Control

    Upper limit compressor step: Decrease 2step HP≥B After 15 sec. Current step maintained HP≥A High pressure abnormal standby HP<D Restart permission=ON Compressor restarts EODA18H-2436/4860 Value setting 566psig [3.9MPa] 566psig [3.9MPa] Cooling Heating 493psig [3.4MPa] 479psig [3.3MPa] 479psig [3.3MPa] 450psig [3.1MPa] 464psig [3.2MPa]...
  • Page 13 LP<B After 15 sec. Current step maintained LP<A Low pressure abnormal standby LP≥D Restart permission=ON Compressor restarts 24.5psig [0.17MPa] Value setting EODA18H-2436/4860 43.5psig [0.30MPa] 61.0psig [0.42MPa] 72.5psig [0.50MPa] Manufacturer reserves the right to change specifications or designs without notice. 09.2018...
  • Page 14 Upper limit compressor step: Decrease 2steps After 15 sec. TD≥B Current step maintained TD≥A Discharge temperature abnormal standby TD<D Restart permission=ON Compressor restarts EODA18H-2436/4860 Value setting 248°F (120°C) 230°F (110°C) Cooling Heating 230°F (110°C) 212°F (100°C) 212°F (100°C) 194°F (90°C) 194°F (90°C)
  • Page 15 Upper limit compressor step: Decrease 1step TF≥B After 15 sec. Current step maintained TF≥A Inverter heat sink temperature abnormal standby TF<D Restart permission=ON Compressor restarts EODA18H-2436 EODA18H-4860 Value setting 181°F (83°C) Cooling 181°F (83°C) Heating 176°F (80°C) Cooling 167°F (75°C) Heating 174°F (79°C)
  • Page 16 Upper limit compressor step=Current step IA≥B Upper limit compressor step: Decrease 1step IA≥B After 30 sec. Current step maintained IA≥A Inverter current abnormal standby IA<D Restart permission=ON Compressor restarts EODA18H-2436 EODA18H-4860 Value setting Cooling Heating Cooling Heating 9.2A 9.5A 12.1A 12.1A 8.6A 9.1A...

  • Page 17: Field Setting

    ESI(Ultra) Service Manual www.ecoer.com 17/62 2.3 Field Setting 2.3.1 Default display LED on main control board can display the operating state of outdoor unit (ODU). SEG1 SEG2 SEG3 7 segment display instructions SEG1: Normally blank, but it displays codes “1~9” accordingly if there is damaged sensor and demand control requirement.
  • Page 18 ESI(Ultra) Service Manual www.ecoer.com 18/62 Mode list (SEG3 Display) SEG1 SEG2 SEG3 Stop or standby without running signal (Y=OFF) →State Code (SEG3): 0 SEG1 SEG2 SEG3 Wait to start after receiving running signal (Y=ON) (6 minutes for pressure equalization to restart) →State Code (SEG3): 1...
  • Page 19 ESI(Ultra) Service Manual www.ecoer.com 19/62 2.3.2 Setting by dip switches Condensing units’ functions can be applied by dipping switch and pressing buttons on the job site. NO ． Setting item State Content SW1 dip switch Description Reserved 2 or 4 Ton...
  • Page 20 ESI(Ultra) Service Manual www.ecoer.com 20/62 System states can be showed on the 7 segments display of outdoor unit. Press BS3 button to get Default mode (Spot check) code number and corresponding detailed information with an interval of one second. Example:...
  • Page 21 ESI(Ultra) Service Manual www.ecoer.com 21/62 Press and hold BS1 button for 5 seconds to enter the parameter setting interface. The latest setting Setting mode will be taken as the final one. 0(factory) Normal mode Symbol Function Item Description Dry mode *1...
  • Page 22 ESI(Ultra) Service Manual www.ecoer.com 22/62 Example for mode choice (n00) setting Step1 Step2 Step3 Press BS3 to enter sub-item Press and hold BS1 for 5 Press BS2 to select item seconds. (n00 for this case). setting. SEG1 SEG2 SEG3 SEG1...
  • Page 23 ESI(Ultra) Service Manual www.ecoer.com 23/62 Illustration for n05~07 setting Silent mode setting. Night time setting Night time setting - End time. - Start time. 0 (Factory): none silent mode 1: Silent mode (level 1) 0: 5:00 0: 17:00 2: Super silent mode (level 2)
  • Page 24 ESI(Ultra) Service Manual www.ecoer.com 24/62 Press BS1 button once to query the current special setting, or check it from Ecoer Smart Service App. Query Setting mode BS1: Menu or back button SEG1 SEG2 SEG3 BS2: UP button Blinking BS3: Spot check and confirm button Press or tip any directions are valid.

  • Page 25: Troubleshooting

    0(factory): TA<15°F (24V output) 1: TA<10°F (24V output) INDOOR UNIT OUTDOOR UNIT 2: TA<5°F (24V output) ONLY AVAILABLE TO ECOER THERMOSTAT 3: TA<-3°F (24V output) WITH EAHATN SERIES INDOOR UNIT 4: OFF (No 24V output) Notes: 1. Be sure power supply agrees with equipment nameplate.

  • Page 26: Outdoor Unit

    ESI(Ultra) Service Manual www.ecoer.com 26/62 Ecoer Variable Speed Heat Pump Matches with Air Handler and Electric Heater 24 Volt + Common Fan Operation Air Conditioning (Heating or Cooling) Mode Switch (Energize in Cooling) Aux / Emergency Heat (Thermostat) Heat with Fan Linkage (Air Handler)
  • Page 27 ESI(Ultra) Service Manual www.ecoer.com 27/62 Ecoer Variable Speed Air Conditioner (Cooling Only) Matches with Air Handler 24 Volt + Common Fan Operation Air Conditioning (Heating or Cooling) Mode Switch (Energize in Cooling) Aux / Emergency Heat (Thermostat) Heat with Fan Linkage (Air Handler)
  • Page 28 Outdoor Unit Control Wire Size: 18 AWG Ecoer provides a unique solution to achieve heat pump function without O signal. Refer to installation guides of actual thermostat or equipment to verify the control wiring. Manufacturer reserves the right to change specifications or designs without notice.
  • Page 29 Outdoor Unit Control Wire Size: 18 AWG Ecoer provides an unique solution to achieve heat pump function without O signal. Refer to installation guides of actual thermostat or equipment to verify the control wiring. Manufacturer reserves the right to change specifications or designs without notice.
  • Page 30 Outdoor Unit Control Wire Size: 18 AWG Ecoer provides an unique solution to achieve heat pump function without O signal. Refer to installation guides of actual thermostat or equipment to verify the control wiring. Manufacturer reserves the right to change specifications or designs without notice.
  • Page 31 ESI(Ultra) Service Manual www.ecoer.com 31/62 Past error codes can be spot checked from default mode by BS3 button, and seen from Ecoer Smart Error code List for Outdoor Unit Service App. High pressure protection Error Code Description Legend System locks up when P1 has occurred six times in 3 hours.
  • Page 32 ESI(Ultra) Service Manual www.ecoer.com 32/62 No Display The unit energized but the digital tube shows nothing No display on main control board even though the unit has been powered ON. 1.Error definition: Damaged noise filter 2.Possible causes: Damaged inductance ...
  • Page 33 ESI(Ultra) Service Manual www.ecoer.com 33/62 Display High pressure protection P1: The detected high pressure is no less than 566psig. 1.Error definition: E1: System locks up when P1 has occurred six times within 3 hours. Service valves are closed 2.Possible causes: The system has been severely over-charged ...
  • Page 34 ESI(Ultra) Service Manual www.ecoer.com 34/62 Display Low pressure protection in cooling mode P2: The detected low pressure in cooling mode is less than 24.5psig. 1.Error definition: E2: System locks up when P2 has occurred six times within 3 hours. Service valves are closed 2.Possible causes:...
  • Page 35 ESI(Ultra) Service Manual www.ecoer.com 35/62 Display Compressor discharge temperature(TD) protection P3: The detected discharge temperature(TD) is no less than 248°F. 1.Error definition: E3: System locks up when P3 has occurred six times within 3 hours. Too little refrigerant remains in the system 2.Possible causes:...
  • Page 36 ESI(Ultra) Service Manual www.ecoer.com 36/62 Display Compressor discharge temperature(TD) sensor is disconnected or damaged Compressor discharge temperature (TD) sensor is disconnected or damaged. 1.Error definition: • TD<Tc-9°F for 20 minutes, Tc means the condensing temperature. • The suction superheat(SH) ≥9°F but TD<TH-9°F lasts 20 minutes in cooling mode.
  • Page 37 P5: The detected value of module temperature (TF) is no less than specific value. 1.Error definition: EODA18H-2436: 181°F EODA18H-4860: 176°F in cooling mode/ 167°F in heating mode E5: System locks up when P5 has occurred six times within 3 hours.
  • Page 38 Display Compressor over-current protection P6: The detected compressor current is over the maximum allowable value. 1.Error definition: EODA18H-2436: 16A EODA18H-4860: 20A E6: System locks up when P6 has occurred six times within 3 hours. Abnormal power supply voltage 2.Possible causes: Too much refrigerant in the system resulting in liquid slugging at compressor ...

  • Page 39: Cooling Mode

    ESI(Ultra) Service Manual www.ecoer.com 39/62 Display Liquid slugging protection This control is to prevent compressor from damaging because of liquid slugging. 1.Error definition: When SH<9.0°F and discharge superheat (DSH=TD-Tc) <14.4°F for 30 minutes, starting to accumulate the liquid slugging time. Report P7 once it lasts for 60 minutes.

  • Page 40: Heating Mode

    ESI(Ultra) Service Manual www.ecoer.com 40/62 Connect a pressure gauge to liquid service valve, compare the gauged pressure with the Heating mode transduced one by high pressure sensor. Check whether the discharge temperature sensor is properly seated on the compressor discharge pipe and securely connected Reset or reconnect the sensor to CN7 terminal on the main control board.
  • Page 41 ESI(Ultra) Service Manual www.ecoer.com 41/62 Display Low compressor voltage protection P8: The detected compressor voltage by main chip is less than 310VDC. 1.Error definition: E8: System locks up when P8 has occurred three times in 60 minutes. Abnormal power supply voltage 2.Possible causes:...
  • Page 42 The unit is undergoing hurricane  Disconnected wiring between fan motor and main control board   Had the IoT gateway successfully communicated with Ecoer Make sure the IoT gateway cloud after installation? works properly. Waiting for the wind decrease...
  • Page 43 ESI(Ultra) Service Manual www.ecoer.com 43/62 Display Ambient temperature(TA) sensor fault The outside temperature(TA) sensor is short circuit or open circuit. 1.Error definition: Damaged main control board 2.Possible causes: Loose connection at port on main control board  Damaged temperature sensor ...
  • Page 44 ESI(Ultra) Service Manual www.ecoer.com 44/62 Display Compressor suction temperature(TS) sensor fault The suction temperature(TS) sensor is short circuit or open circuit. 1.Error definition: Damaged main control board 2.Possible causes: Loose connection at port on main control board  Damaged temperature sensor(TS) ...
  • Page 45 ESI(Ultra) Service Manual www.ecoer.com 45/62 Display Liquid line temperature(TL) sensor fault The liquid temperature(TL) sensor is short circuit or open circuit. 1.Error definition: Damaged main control board 2.Possible causes: Loose connection at port on main control board  Damaged temperature sensor ...
  • Page 46 ESI(Ultra) Service Manual www.ecoer.com 46/62 Display Defrost temperature(TH) sensor fault The defrost temperature(TH) sensor is short circuit or open circuit. 1.Error definition: Damaged main control board 2.Possible causes: Loose connection at port on main control board  Damaged temperature sensor ...
  • Page 47 ESI(Ultra) Service Manual www.ecoer.com 47/62 Display Compressor discharge temperature(TD) sensor fault The discharge temperature(TD) sensor is short circuit or open circuit. 1.Error definition: Damaged main control board 2.Possible causes: Loose connection at port on main control board  Temperature sensor failure ...
  • Page 48 ESI(Ultra) Service Manual www.ecoer.com 48/62 Display Inverter module temperature(TF) sensor fault The module temperature(TF) sensor is short circuit or open circuit. 1.Error definition: Damaged main control board 2.Possible causes: Loose connection at port on main control board.  Temperature sensor failure ...
  • Page 49 ESI(Ultra) Service Manual www.ecoer.com 49/62 Display High pressure(HP) sensor fault The high pressure sensor is open or shorted. 1.Error definition and method to check: The voltage between CN10 pin(1) and (2) is not in the range 0.59~4.76VDC. CN10 IC A/D...
  • Page 50 ESI(Ultra) Service Manual www.ecoer.com 50/62 Display Low pressure(LP) sensor fault The low pressure sensor is open or shorted. 1.Error definition and method to check: The voltage between CN9 pin(1) and (2) is not in the range 0.70~4.50VDC. IC A/D White...
  • Page 51 ESI(Ultra) Service Manual www.ecoer.com 51/62 Display Communication fault between main chip and INV drive chip Communication fault between the main control chip and inverter chip. 1.Error definition and method to check: Loose connection at CN21 terminal 2.Possible causes: Damaged main control board ...
  • Page 52 ESI(Ultra) Service Manual www.ecoer.com 52/62 Display Ambient temperature limit operation H1: The detected ambient temperature is absolutely prohibited for cooling. 1.Error definition and method to check: TA<14°F or ≥140°F H2: The detected ambient temperature is absolutely prohibited for heating. TA ≥ 86°F or TA< forced heating stop temperature set by n01 The ambient temperature exceeds the set range of operation.
  • Page 53 ESI(Ultra) Service Manual www.ecoer.com 53/62 Display Abnormal switch alarm for 4-way valve 4-way valve switches incompletely after defrost operation or from cooling mode. 1.Error definition: Report H3 alarm if TH ≥ TL+10.8°F and TH ≥ TA+5.4°F. Damaged 4-way valve(coil or body) 2.Possible causes:...
  • Page 54 ESI(Ultra) Service Manual www.ecoer.com 54/62 Display Defrost temperature(TH) sensor is disconnected or damaged The defrost temperature(TH) sensor is short circuit or open circuit. 1.Error definition: Damaged main control board 2.Possible causes: The defrost temperature sensor is wrongly seated  Temperature sensor failure ...
  • Page 55 ESI(Ultra) Service Manual www.ecoer.com 55/62 Display EEPROM fault Data cannot be correctly received from the EEPROM to main chip. 1.Error definition: EEPROM, a type of memory component, remembers contents even though power off. Damaged main control board 2.Possible causes: ...
  • Page 56 ESI(Ultra) Service Manual www.ecoer.com 56/62 Display Compressor INV module ～ protection 1.Error definition: Critical over-voltage fault Zero speed fault (compressor RPS<6 lasts 2 seconds) Code Definition Code Definition Compressor speed inconsistent fault Compressor speed difference between given transient DC bus over-voltage protection...

  • Page 57: Appendix

    ESI(Ultra) Service Manual www.ecoer.com 57/62 4 Appendix Temperature sensor A* (TS,TH,TA,TL) 4.1 Sensor Characteristic Temp. Temp. Resistance Voltage Temp. Temp. Resistanc Voltage Temp. Temp. Resistance Voltage (°C) (°F) e (KΩ) (°C) (°F) (KΩ) (°C) (°F) (KΩ) 104.86 0.53 71.6 11.49 2.10...
  • Page 58 Temperature sensor B* (TF,TD) ESI(Ultra) Service Manual www.ecoer.com 58/62 Temp. Temp. Resistance Voltage Temp. Temp. Resistance Voltage Temp. Temp. Resistance Voltage (°C) (°F) (KΩ) (°C) (°F) (KΩ) (°C) (°F) (KΩ) 177.8 6.67 2.89 517.84 0.27 87.8 43.10 1.72 179.6 6.46 2.90...
  • Page 59 ESI(Ultra) Service Manual www.ecoer.com 59/62 Low Pressure Sensor Voltage Characteristics C* Resistance Output Resistance Output pressure pressure pressure pressure (KΩ) voltage(V) (KΩ) voltage(V) (MPa) (psig) (MPa) (psig) 0.10 14.5 49.51 0.70 0.68 98.6 13.61 1.86 0.11 47.91 0.72 0.70 13.15 1.90...
  • Page 60 ESI(Ultra) Service Manual www.ecoer.com 60/62 High Pressure Sensor Voltage Characteristics D* High High High High Resistance Output Resistance Output pressure pressure pressure pressure (KΩ) voltage(V) (KΩ) voltage(V) (MPa) (psig) (MPa) (psig) 14.5 60.60 0.59 449.5 4.55 3.20 51.74 0.67 4.22 3.28...

  • Page 61: Wiring Diagram

    ESI(Ultra) Service Manual www.ecoer.com 61/62 4.2 Wiring Diagram Manufacturer reserves the right to change specifications or designs without notice. 09.2018...
  • Page 62 ESI(Ultra) Service Manual www.ecoer.com 62/62 Manufacturer reserves the right to change specifications or designs without notice. 09.2018...
  • Page 63 ESI(Ultra) Service Manual www.ecoer.com 63/62 Manufacturer reserves the right to change specifications or designs without notice. 09.2018...
  • Page 64 ESI(Ultra) Service Manual www.ecoer.com 64/62 ©2018 ECOER INC. 3900 Jermantown Rd., Suite 150, Fairfax, VA 22030 Tel: 703-348-2538 www.ecoer.com Manufacturer reserves the right to change specifications or designs without notice. 09.2018...

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