Ecoer R-410A Service Manual

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ESI (Ultra) Service Manual

ESI (Ultra) R-410A

Unitary Service Manual

Contents

1. General Information----------------------------

2. ESI (Ultra) Unitary System---------------------

2.1 Refrigerant Circuit----------------------------

2.2 Function and Control------------------------

2.3 Field Setting-----------------------------------

3. Troubleshooting----------------------------------

3.1 Problems without Codes --------------------

3.2 Error Codes list ----------------------------- -

4. Parts List--------------------------------------------

5. Appendix-------------------------------------------

5.1 Sensor Characteristics------------------------

5.2 Wiring Diagram-------------------------------

All phases of this installation must comply with National, State and Local Codes.

IMPORTANT

These instructions do not cover all variations in systems or provide for every possible contingency to

be met in connection with installing and servicing. Should further information be desired or should

particular problems arise which are not covered sufficiently for the purchaser's purposes, the matter

should be referred to local distributor.

Manufacturer reserves the right to change specifications or designs without notice.

1/62

www.ecoer.com

03.2021

Table of Contents

Summary of Contents for Ecoer R-410A

Page 1: Table Of Contents
ESI (Ultra) Service Manual www.ecoer.com 1/62 ESI (Ultra) R-410A Unitary Service Manual Contents 1. General Information---------------------------- 2. ESI (Ultra) Unitary System--------------------- 2.1 Refrigerant Circuit---------------------------- 2.2 Function and Control------------------------ 2.3 Field Setting----------------------------------- 3. Troubleshooting---------------------------------- 3.1 Problems without Codes -------------------- 3.2 Error Codes list ----------------------------- - 4.
Page 2: General Information
ESI (Ultra) Service Manual www.ecoer.com 2/62 1 General Information Condensing 4860 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: AC only 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 EODA18H-2436 High Pressure Low Pressure DC Motor (FAN) Sensor (LP) Sensor (HP) Fan Blades Inductance Noise Filter Heat Exchanger...
Page 4 ESI (Ultra) Service Manual www.ecoer.com 4/62 EODA18H-4860 High Pressure Low Pressure Sensor (HP) Sensor (LP) DC Motor (FAN) Heat Fan Blades Exchanger Inductance Noise Filter Main Control Board (PCB) Accumulator (ACC) Electronic Expansion Reversing Valve (ST1) Lower Side Plate Gauge Port...
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 (RV) Gauge Port Name Symbol Function Adjusts refrigerant flow rate by changing the compressor speed (RPS) Inverter compressor based on objective pressure.
Page 6 ESI (Ultra) Service Manual www.ecoer.com 6/62 2.1.3 Refrigerant Flow of Each Operation Mode Cooling Operation (including defrost operation and cooling oil return) Liquid Service Valve Indoor Coil Heat Exchanger Gas Service Valve (RV) Gauge Port Strainer High pressure Gas High pressure Liquid Low pressure Gas Low pressure Mix.
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 energized) • Thermostat OFF Pressure equalizing Restart standby (Y de-energized) prior to start-up (compressor stops) • O signal change MAX.
Page 8 ESI (Ultra) Service Manual www.ecoer.com 8/62 2.2.2 Basic control 2.2.2.1 Normal control Input Cooling control (including Heating control (including Actuator Signal cooling oil return) heating oil return) Compressor (INV) Apply PI control to maintain Tes Apply PI control to maintain Tcs...
Page 9 AUTO charge mode locks the compressor speed in cooling. The LED will display the refrigerant coefficient if both the liquid line sub-cooling (SC) and compressor suction superheat (SH) 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 ESI (Ultra) Service Manual www.ecoer.com 10/62 2.2.2.4 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 ESI (Ultra) Service Manual www.ecoer.com 11/62 2.2.2.6 Electronic expansion valve (EEV) control 25~50゜F Standby after PI control getting start signal Cooling: 360pls→480pls • Cooling: 480pls • Heating: 360pls→0pls • Heating: Depending on the compressor • discharge superheat (DSH). *NOTE Start-up control...
Page 12 ESI (Ultra) Service Manual www.ecoer.com 12/62 2.2.3. Protection controls 2.2.3.1 High pressure protection control High pressure (HP) protection control is used to prevent extremely high pressures in the system and protect the compressor. Normal operation (Upper limit compressor step = Max. step) HP<D...
Page 13 ESI (Ultra) Service Manual www.ecoer.com 13/62 2.2.3.2 Low pressure protection control in cooling mode Low pressure (LP) protection control in cooling is used to protect compressor against the transient decrease of low pressure. Normal operation (Upper limit compressor step = Max. step) LP<C...
Page 14 ESI (Ultra) Service Manual www.ecoer.com 14/62 2.2.3.3 Discharge temperature protection control This discharge temperature (TD) protection control is used to protect the compressor internal temperature against a malfunction or transient increase of discharge pipe temperature. Normal operation (Upper limit compressor step = Max. step) TD<D...
Page 15 ESI (Ultra) Service Manual www.ecoer.com 15/62 2.2.3.4 INV Module temperature protection control Inverter module temperature (TF) protection control is performed to prevent tripping due to an abnormal increase in temperature. Normal operation (Upper limit compressor step = Max. step) TF≥C TF<D...
Page 16 ESI (Ultra) Service Manual www.ecoer.com 16/62 2.2.3.5 Compressor over-current protection control This control is performed to prevent tripping due to an abnormal transient compressor current (IA). Normal operation (Upper limit compressor step = Max. step) IA≥C IA<D IA<D Upper limit compressor step = Current step IA≥B...
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 status of outdoor unit (ODU). SEG1 SEG2 SEG3 7 segment display instructions SEG1: Normally blank, but it displays codes “0 to 9” accordingly if there is damaged sensor and command response.
Page 18 ESI (Ultra) Service Manual www.ecoer.com 18/62 Modes list (SEG3 Display) SEG1 SEG2 SEG3 Stop or standby (Y signal de-energized) SEG1 SEG2 SEG3 Ready to start-up (Y signal energized) (6 to 8 minutes for pressure equalization to restart) SEG1 SEG2 SEG3...
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. SW1 dip switch Description NO ． Setting item Status Content Reserved 2 or 4 Ton Capacity selection...
Page 20 ESI (Ultra) Service Manual www.ecoer.com 20/62 Default mode (Spot check) System states can be showed on the 7 segments display (LED) of outdoor unit. Press BS3 button to get code number and corresponding detailed information with an interval of one second.
Page 21 2. The evaporating temperature of indoor coil can drop down to 28ºF in cooling mode, and the condensing temperature can go up to 122ºF in heating mode. 3. Contact Ecoer Service Team to update software if the units produced prior to April 1 , 2019.
Page 22 ESI (Ultra) Service Manual www.ecoer.com 22/62 Example for mode choice (n00) setting SEG1 SEG2 SEG3 Blinking Press buttons BS1: Menu or back button BS2: UP button BS3: Spot check and confirm button Remarks: Press or tip any directions are valid.
Page 23 ESI (Ultra) Service Manual www.ecoer.com 23/62 Example for n02 & n03 (Dual-heating) setting Air Handler with Electric Heater Kit (EHK) Heat Pump Unit Y signal from thermostat Condensing unit calls EHK of air handler to turn ON. Outdoor W terminal outputs 24VAC at defrost control or forced heat pump stop temperature (n01 setting).
Page 24 ESI (Ultra) Service Manual www.ecoer.com 24/62 Example for n02 & n03 setting (AUTO change-over heating) Cased Coil with Furnace Heat Pump Unit Y signal from thermostat Condensing unit calls gas furnace Forced heat pump stop 0: TA<-22° F 1: TA<-3° F (factory) 2: TA<15°...
Page 25 ESI (Ultra) Service Manual www.ecoer.com 25/62 Illustration for n05 to n07 settings Noise of silent mode is about 3 dB lower than normal mode. Noise of super silent mode is about 6 dB lower than normal mode. Night time setting Night time setting Silent mode setting.
Page 26 ESI (Ultra) Service Manual www.ecoer.com 26/62 Query Settings Press BS1 button once to query the current settings, or check it via Ecoer Smart Service Pro App. SEG1 SEG2 SEG3 Blinking Press buttons BS1: Menu or back button BS2: UP button BS3: Spot check and confirm button Remarks: Press or tip any directions are valid.
Page 27: Troubleshooting
0: TA<15°F (24V output) --Factory 1: TA<30°F (24V output) INDOOR UNIT OUTDOOR UNIT 2: TA<40°F (24V output) ONLY AVAILABLE TO ECOER THERMOSTAT WITH EAHATN-xx AIR HANDLER 3: TA<-3°F (24V output) 4: OFF NOTES: 1. Be sure power supply agrees with equipment nameplate.
Page 28 ESI (Ultra) Service Manual www.ecoer.com 28/62 No Display The unit energized but the digital tube shows nothing 1.Error definition: No display on main control board even though the unit has been powered ON. 2.Possible causes: Damaged noise filter ◼ Damaged inductance ◼...
Page 29: Error Codes List
ESI (Ultra) Service Manual www.ecoer.com 29/62 3.2 Error Codes List Past error codes can be inquired by BS3 button, and viewed on Ecoer Smart Service Pro App. Code Description Legend Page High pressure protection System locks up when P1 has occurred six times in 3 hours.
Page 30 ESI (Ultra) Service Manual www.ecoer.com 30/62 Display High pressure protection 1.Error definition: P1: The detected high pressure is no less than 566psig. E1: System locks up when P1 has occurred six times within 3 hours. 2.Possible causes: Service valves are closed ◼...
Page 31 ESI (Ultra) Service Manual www.ecoer.com 31/62 Display Low pressure protection in cooling mode 1.Error definition: P2: The detected low pressure in cooling mode is less than 24.5psig. E2: System locks up when P2 has occurred six times within 3 hours.
Page 32 ESI (Ultra) Service Manual www.ecoer.com 32/62 Display Compressor discharge temperature (TD) protection 1.Error definition: P3: The detected discharge temperature(TD) is no less than specified value. Cooling: 248°F Heating: 230°F E3: System locks up when P3 has occurred six times within 3 hours.
Page 33 ESI (Ultra) Service Manual www.ecoer.com 33/62 Display Compressor discharge temperature (TD) sensor is disconnected or damaged 1.Error definition: Compressor discharge temperature (TD) sensor is disconnected or damaged. TD<Tc-9°F for 20 minutes, Tc means the condensing temperature. 2.Possible causes: Discharge temperature (TD) sensor is disconnected or damaged ◼...
Page 34 ESI (Ultra) Service Manual www.ecoer.com 34/62 Display Inverter module temperature (TF) protection 1.Error definition: P5: The detected value of module temperature (TF) is no less than specified value. 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 35 ESI (Ultra) Service Manual www.ecoer.com 35/62 Display Compressor over-current protection 1.Error definition: P6: The detected compressor current is over the maximum allowed value. EODA18H-2436: 16A EODA18H-4860: 20A E6: System locks up when P6 has occurred six times within 3 hours.
Page 36 ESI (Ultra) Service Manual www.ecoer.com 36/62 Display Liquid slugging protection 1.Error definition: This control is to prevent compressor from damaging because of liquid slugging. When SH<9.0°F and compressor discharge superheat (DSH=TD-SC-TL-1.8) <14.4°F for 20 minutes, starting to accumulate the liquid slugging time. Report P7 once it lasts for 30 minutes.
Page 37 ESI (Ultra) Service Manual www.ecoer.com 37/62 Display Liquid slugging protection Heating mode Connect a pressure gauge to liquid service valve, compare the gauged pressure with the transduced one by high pressure sensor. Check whether the discharge temperature sensor is properly...
Page 38 ESI (Ultra) Service Manual www.ecoer.com 38/62 Display Low compressor voltage protection 1.Error definition: P8: The detected compressor voltage by main chip is less than 310VDC. E8: System locks up when P8 has occurred three times in 60 minutes. 2.Possible causes: Abnormal power supply voltage ◼...
Page 39 The unit is undergoing hurricane ◼ Disconnected wiring between fan motor and main control board ◼ Had the IoT device successfully communicated with Ecoer cloud Make sure the IoT device works after installation? *NOTE properly. Is the fan speed higher than 200RPM on stop/standby condition?
Page 40 ESI (Ultra) Service Manual www.ecoer.com 40/62 Display Ambient temperature (TA) sensor fault 1.Error definition: The outside temperature (TA) sensor is short circuit or open circuit. 2.Possible causes: Damaged main control board ◼ Loose connection at port on main control board ◼...
Page 41 ESI (Ultra) Service Manual www.ecoer.com 41/62 Display Compressor suction temperature (TS) sensor fault 1.Error definition: The suction temperature (TS) sensor is short circuit or open circuit. 2.Possible causes: Damaged main control board ◼ Loose connection at port on main control board ◼...
Page 42 ESI (Ultra) Service Manual www.ecoer.com 42/62 Display Liquid line temperature (TL) sensor fault 1.Error definition: The liquid temperature (TL) sensor is short circuit or open circuit. 2.Possible causes: Damaged main control board ◼ Loose connection at port on main control board ◼...
Page 43 ESI (Ultra) Service Manual www.ecoer.com 43/62 Display Defrost temperature (TH) sensor fault 1.Error definition: The defrost temperature (TH) sensor is short circuit or open circuit. 2.Possible causes: Damaged main control board ◼ Loose connection at port on main control board ◼...
Page 44 ESI (Ultra) Service Manual www.ecoer.com 44/62 Display Compressor discharge temperature (TD) sensor fault 1.Error definition: The discharge temperature (TD) sensor is short circuit or open circuit. 2.Possible causes: Damaged main control board ◼ Loose connection at port on main control board ◼...
Page 45 Or Turn off the power supply, unplug the TF sensor to Replace the main control board check if the resistance is in the range of Temperature sensor B. *TIPS2 Contact Ecoer Service Team for assist before claim the main control board TIPS: 1.
Page 46 ESI (Ultra) Service Manual www.ecoer.com 46/62 Display High pressure (HP) sensor fault 1.Error definition and method to check: The high pressure sensor is open or shorted. The voltage between CN10 pin(1) and (2) is not in the range 0.59~4.76VDC. CN10...
Page 47 ESI (Ultra) Service Manual www.ecoer.com 47/62 Display Low pressure (LP) sensor fault 1.Error definition and method to check: The low pressure sensor is open or shorted. The voltage between CN9 pin(1) and (2) is not in the range 0.70~4.50VDC. IC A/D...
Page 48 ESI (Ultra) Service Manual www.ecoer.com 48/62 Display Communication fault between main chip and INV drive chip 1.Error definition and method to check: Communication fault between the main control chip and inverter chip. 2.Possible causes: Loose connection at CN21 terminal ◼...
Page 49 ESI (Ultra) Service Manual www.ecoer.com 49/62 Display Ambient temperature limit operation 1.Error definition and method to check: H1: The detected ambient temperature is absolutely prohibited for cooling. TA<32°F or ≥140°F H2: The detected ambient temperature is absolutely prohibited for heating.
Page 50 ESI (Ultra) Service Manual www.ecoer.com 50/62 Display Abnormal switch alarm for reversing valve 1.Error definition: 4-way (reversing) valve switches incompletely after defrost operation or from cooling mode. Report H3 alarm if TH ≥ TL+10.8°F and TH ≥ TA+5.4°F. 2.Possible causes: Damaged reversing valve(coil or body) ◼...
Page 51 ESI (Ultra) Service Manual www.ecoer.com 51/62 Display Defrost temperature (TH) sensor is disconnected or damaged 1.Error definition: The defrost temperature (TH) sensor is short circuit or open circuit. 2.Possible causes: Damaged main control board ◼ The defrost temperature sensor is wrongly seated ◼...
Page 52 Turn off the power supply for five minutes, then turn on the Back to normal power supply to check if the system goes back to normal? Contact Ecoer Service Team Manufacturer reserves the right to change specifications or designs without notice. 03.2021...
Page 53 ESI (Ultra) Service Manual www.ecoer.com 53/62 Display Compressor INV module ～ protection 1.Error definition: Code LED Display Definition Critical over-voltage fault DC bus over-voltage protection DC bus under-voltage protection Over-current protection Zero speed fault Compressor speed inconsistent fault Compressor speed difference between given transient variation...
Page 54 ESI (Ultra) Service Manual www.ecoer.com 54/62 Display Compressor INV module ～ protection Contact power supply agency to The power supply voltage is not in the range of 187~253VAC. verify that they are sending the correct voltage. Replace the indoor coil...
Page 55 ESI (Ultra) Service Manual www.ecoer.com 55/62 How to diagnose the INV module is damaged or not Turn off the power supply for five (5) minutes prior to do the diagnosis. To DC motor Disconnect the compressor wiring from the main control board.
Page 56: Parts List
ESI (Ultra) Service Manual www.ecoer.com 56/62 4 Parts List Model Part Number F522900000 EODA18H-2436 F523100000 EODA18H-4860 Parts number Part Name Quantity Remark 2436 4860 231235269 231235477 Condenser ass'y Condenser connection pipe 231235268 ass'y 231235270 231235271 Condenser 231235085 231235153 Condenser outlet pipe ass'y...
Page 57 ESI (Ultra) Service Manual www.ecoer.com 57/62 Parts number Part Name Quantity Remark 2436 4860 Roof support frame 230801628 230801590B 230801609B Supporting board 230803142 230802064A Side board ass'y Side board ass'y 230803143 230802065A 231235131 231235854 High-pressure valve ass'y 13.1 231231469 Liquid block valve Electronic expansion valve 13.2...
Page 58: Appendix
ESI (Ultra) Service Manual www.ecoer.com 58/62 5 Appendix 5.1 Sensor Characteristic Temperature sensor A* (TS, TH, TA, TL) Temp. Temp. Resistanc Voltage Temp. Temp. Resistance Voltage Temp. Temp. Resistance Voltage (°C) (°F) e (KΩ) (°C) (°F) (KΩ) (°C) (°F) (KΩ) 104.86...
Page 59 ESI (Ultra) Service Manual www.ecoer.com 59/62 Temperature sensor B* (TF, TD) Temp. Temp. Resistance Voltage Temp. Temp. Resistance Voltage Temp. Temp. Resistance Voltage (°C) (°F) (KΩ) (°C) (°F) (KΩ) (°C) (°F) (KΩ) 0.41 177.8 6.67 3.03 1.58 517.84 87.8 43.10 179.6...
Page 60 ESI (Ultra) Service Manual www.ecoer.com 60/62 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...
Page 61 ESI (Ultra) Service Manual www.ecoer.com 61/62 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...
Page 62: Wiring Diagram
ESI (Ultra) Service Manual www.ecoer.com 62/62 5.2 Wiring Diagram EODA18H-2436 EODA18H-4860 Manufacturer reserves the right to change specifications or designs without notice. 03.2021...
Page 63 ESI (Ultra) Service Manual www.ecoer.com 63/62 Manufacturer reserves the right to change specifications or designs without notice. 03.2021...
Page 64 ESI (Ultra) Service Manual www.ecoer.com 64/62 ©2021 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. 03.2021...

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