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

10.2019 

ESI (Ultra) Service Manual 

www.ecoer.com 

5/68 

 

 

TL 

EEV 

FAN 

TH  Heat Exchanger 

Gas Service Valve 

ST1 

Gauge Port 

TD 

INV 

TS 

ACC 

HP 

LP 

 

2.1.2

 

Major Components Functions and Refrigerant Circuits Diagram 

Liquid Service Valve 

TA 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Name

 

Symbol

 

Function

 

Inverter compressor  INV 

Adjusts refrigerant flow rate by changing the compressor speed (RPS) 

based on objective pressure. 

DC motor 

FAN 

Outputs heat exchanger capacity by adjusting the motor rotation speed 

based on operating pressure. 

Electronic expansion 

valve 

EEV 

1)

 

Fully open during cooling mode and defrost operation. 

2)

 

Control compressor discharge superheat in heating mode. 

Reversing valve 

ST1 

Switches the operation mode between heating and cooling (including 

defrost control). 

 

 

 

 

Temperature sensor 

TH 

Uses to control defrosting during heating operation. 

TA 

Uses to detect outdoor air temperature and control fan speed. 

TS 

Uses to detect compressor suction temperature and calculate compressor 

suction superheat (SH). 

TL 

Uses to detect liquid line temperature and calculate sub-cooling (SC). 

TD 

Uses to detect compressor discharge temperature and calculate 

compressor discharge superheat (DSH). 

TF 

Uses to detect heat sink temperature of inverter module. 

High pressure sensor  HP 

Uses to detect high pressure. 

Low pressure sensor  LP 

Uses to detect low pressure. 

Accumulator 

ACC 

Uses to store excess refrigerant. 

Содержание EODA18H-2436

Страница 1: ...out Codes 25 3 2 Error Codes list 35 4 Parts List 61 5 Appendix 63 5 1 Sensor Characteristics 63 5 2 Wiring Diagram 67 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...

Страница 2: ...s 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 4860 up to 5Ton Unit E OD A 18 H 4860 60 5Ton 48 4Ton 36 3Ton 24 2Ton Brand E Ecoer Product Series AH Indoor Air Handler Model Letters A 208 230V 1Ph 60Hz Metering device T TXV Communications N 24V Normal Capacity E series Air Handler E AH A T N 36 ...

Страница 3: ...ant Circuit 2 1 1 Functional Parts Layout of Condensing Units EODA18H 2436 Inductance Fan Blades DC Motor FAN High Pressure Sensor HP Low Pressure Sensor LP Noise Filter Heat Exchanger Main Control Board PCB Lower Side Plate Strainers Gauge Port Liquid Gas Service Valve Electronic Expansion Valve EEV Accumulator ACC Inverter Compressor INV Reversing Valve ST1 TD TS TA TH TL ...

Страница 4: ...ades Lower Side Plate DC Motor FAN Strainers Gauge Port Liquid Gas Service Valve High Pressure Sensor HP Electronic Expansion Valve EEV Low Pressure Sensor LP Heat Exchanger Accumulator ACC Reversing Valve ST1 Inverter Compressor INV TA TH TL TIPS Remove screws to take away the lower side plate to access TH TL sensors A slotted screwdriver may be required to open the plate from the condensing unit...

Страница 5: ...g cooling mode and defrostoperation 2 Control compressor discharge superheat in heatingmode Reversing valve ST1 Switches the operation mode between heating and cooling including defrost control Temperature sensor TH Uses to control defrosting during heating operation TA Uses to detect outdoor air temperature and control fan speed TS Uses to detect compressor suction temperature and calculate compr...

Страница 6: ...as Service Valve ST1 Gauge Port TD Strainer High pressure Gas High pressure Liquid Low pressure Gas INV Low pressure Mix TS ACC Heating Operation including heating oil return HP LP TXV Liquid Service Valve TA TL EEV FAN Indoor Coil TH Heat Exchanger Gas Service Valve ST1 Gauge Port TD Strainer High pressure Gas High pressure Liquid Low pressure Gas Low pressure Mix INV TS ACC Cooling Operation inc...

Страница 7: ...n Cooling or heating operation Normal operation Compressor PI control EEV PI control Fan motor control Protection control Oil return IN conditions are met NO YES Oil return operation NOTE Defrost IN conditions are met YES NO NOTES The operation may be enforced to complete under some conditions Pressure equalizing prior to start up Restart standby compressor stops Start up control NOTE Cooling star...

Страница 8: ...n ODU PCB SW1_3 AC HP Switch 2 2 2 2 Defrost control This system carries out demand defrost control if any one of the following conditions satisfy I The calculated temperature difference between ambient temperature TA and defrost temperature TH is called Delta T After Delta T is achieved and continues for 5 minutes a 41 F TA 59 F TH 30 F Delta T 18 F b 19 F TA 41 F TH 30 F Delta T 12 18 F c TA 19 ...

Страница 9: ...ays in AUTO charge mode for more than 20 minutes stop charging and use a wrench to clockwise the TXV to ensure SH is no less than 7 F In case that the cooling performance is terrible due to improper superheat i e SH 20 F Adjust the system according to 1 Activate AUTO charge mode to fix compressor frequency RPS by press BS4 for 5 seconds on outdoor PCB Run the system for 15 20 minutes and check ref...

Страница 10: ...Manufacturer reserves the right to change specifications or designs without notice 10 2019 ESI Ultra Service Manual www ecoer com 10 68 BS4 ...

Страница 11: ...essor RPS VS STEP STEP RPS STEP RPS STEP RPS STEP RPS STEP RPS 1 9 28 17 44 25 60 33 76 2 10 30 18 46 26 62 34 78 3 16 11 32 19 48 27 64 35 80 4 18 12 34 20 50 28 66 36 82 5 20 13 36 21 52 29 68 37 84 6 22 14 38 22 54 30 70 38 86 7 24 15 40 23 56 31 72 39 88 8 26 16 42 24 58 32 74 40 90 Outdoor Capacity 2Ton 3Ton 4Ton 5Ton Cooling Max RPS 70 80 66 76 Heating Max RPS 80 90 80 90 2 2 2 5 Fan control...

Страница 12: ...ves the right to change specifications or designs without notice 10 2019 ESI Ultra Service Manual www ecoer com 12 68 STEP RPM STEP RPM STEP RPM STEP RPM STEP RPM 0 0 2 450 4 680 6 830 8 930 1 350 3 550 5 780 7 880 9 980 ...

Страница 13: ...eld setting both the highest compressor frequency RPS and fan speed RPM are limited Maximum compressor frequency Cooling Max Compressor RPS Condenser Capacity Standard Mode Silent Mode Level 1 Super Silent Mode Level 2 2Ton 70 66 56 3Ton 80 76 70 4Ton 66 66 56 5Ton 76 68 58 Heating Max Compressor RPS Condenser Capacity Standard Mode Silent Mode Level 1 Super Silent Mode Level 2 2Ton 80 70 60 3Ton ...

Страница 14: ...Manufacturer reserves the right to change specifications or designs without notice 10 2019 ESI Ultra Service Manual www ecoer com 14 68 5Ton 980 880 780 ...

Страница 15: ...n Upper limit compressor step Max step 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 step Decrease 2step Current step maintained and HP D Restart permission ON Symbol EODA18H 2436 4860 Cooling Heating A 545psig 3 8MPa 545psig 3 8MPa B 493psig 3 4MPa 479psig ...

Страница 16: ...ssor step Current step Normal operation Upper limit compressor step Max step 2 2 3 2 Low pressure protection control in coolingmode Low pressure LP protection control in cooling is used to protect compressor against the transient decrease of low pressure step Decrease 2steps Current step maintained and LP D Restart permission ON Symbol EODA18H 2436 4860 A 24 5psig 0 17MPa B 43 5psig 0 30MPa C 61 0...

Страница 17: ...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 step Decrease 2steps Current step maintained and TD D Restart permission ON Symbol EODA18H 2436 4860 Cooling Heating A 248 F 120 C 230 F 110 C B 230 F 110 C 212 F 100 C C 212 ...

Страница 18: ...step Max step 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 step Decrease 1step Current step maintained and TF D Restart permission ON Symbol EODA18H 2436 EODA18H 4860 Cooling Heating Cooling Heating A 181 F 83 C 181 F 83 C 176 F 80 C 167 F 75 C B 174 F 79 C 158 F 70 C ...

Страница 19: ...er limit compressor step Max step 2 2 3 5 Compressor over current protection control This control is performed to prevent tripping due to an abnormal transient compressor current IA step Decrease 1step Current step maintained and IA D Restart permission ON Symbol EODA18H 2436 EODA18H 4860 Cooling Heating Cooling Heating A 16A 16A 20A 20A B 9 2A 9 5A 12 1A 12 1A C 8 6A 9 1A 11 7A 11 7A D 8 0A 8 5A ...

Страница 20: ...temperature sensor TA fault backup running 120 Days 6 Defrost sensor TH fault backup running 90 Days 7 Compressor suction temperature sensor TS fault backup running 120 Days 8 Liquid line temperature sensor TL fault backup running 120 Days 9 IoT demand response SEG2 Normally blank but it will display code accordingly as below if outdoor unit is running under limited condition SEG2 Code Description...

Страница 21: ... SEG3 Stop or standby without running signal Y OFF Wait to start up after receiving running signal Y ON 6 minutes for pressure equalization to restart SEG1 SEG2 SEG3 Cooling mode SEG1 SEG2 SEG3 Heating mode SEG1 SEG2 SEG3 Oil return SEG1 SEG2 SEG3 Defrost SEG1 SEG2 SEG3 Manually defrost SEG1 SEG2 SEG3 SEG1 SEG2 SEG3 AUTO charge mode in cooling Pump down SEG1 SEG2 SEG3 ...

Страница 22: ...ns on main control board SEG1 SEG2 SEG3 Off Blinking On BS1 Menu or back button BS2 UP button BS3 Spot check and confirm button BS1 BS2 BS3 Press buttons Remarks Press or tip any directions are valid Press and hold BS1for 5 seconds to set special functions Press BS1 once to query current setting Setting mode Query setting mode Symbol selection by pressing BS2 button Press BS3 Setting item selectio...

Страница 23: ...Manufacturer reserves the right to change specifications or designs without notice 10 2019 ESI Ultra Service Manual www ecoer com 20 68 Press BS1 once ...

Страница 24: ...ronic expansion valve opening 360 360pls 06 Step of fan 8 The 8th step 07 Low pressure LP sensor 145 145psig 08 High pressure HP sensor 350 350psig 09 Outdoor ambient temp TA 95 95 F 10 Compressor suction temp TS 70 70 F 11 Compressor discharge temp TD 170 170 F 12 Defrost sensor temp TH 80 80 F 13 Liquid line temp TL 70 70 F 14 Inverter module temp TF 150 150 F 15 Target evaporating temp Tes 43 4...

Страница 25: ...an specified value to start indoor auxiliary heat 0 factory TA 15 F 24VAC output 1 TA 10F 30 F 24VAC output 3 2 TA 5F 40 F 24VAC output 3 3 TA 3 F 24VAC output 4 OFF No 24VAC output n04 Defrost mode setting 4 0 Defrost in heavy snow area 1 factory Standard mode 2 Defrost in light snow area n05 Silent mode setting 0 factory None silent mode 1 Silent mode level 1 2 Super silent mode level 2 3 Night ...

Страница 26: ...er gas furnace or other third party heat source using 24V control signal to turn ON n02 Outdoor unit W terminal outputs 24VAC at defrost operation or forced heating stop n01 0 factory ON 24V output 1 OFF No 24V output n03 Outdoor unit W terminal outputs 24VAC once ambient temperature is lower than specific value for auxiliary heating resource to start Only available when n02 0 and Y signal ON 0 fa...

Страница 27: ...Manufacturer reserves the right to change specifications or designs without notice 10 2019 ESI Ultra Service Manual www ecoer com 23 68 n 02 0 n03 1 Outdoor unit W terminal outputs 24VAC when TA 30 F ...

Страница 28: ...l 1 2 Super silent mode level 2 3 Night silent mode level 1 4 Super night silent mode level 2 n06 Night time setting Start time n07 Night time setting End time 0 17 00 1 18 00 Factory 2 19 00 3 20 00 4 21 00 0 5 00 1 6 00 Factory 2 7 00 3 8 00 4 9 00 Example 1 n05 0 n06 n07 24 00 Normal mode Example 2 n05 1 n06 n07 24 00 Silent mode level 1 Example 3 n05 2 n06 n07 24 00 Super silent mode level 2 E...

Страница 29: ...oer Smart Service Pro App SEG1 SEG2 SEG3 Off Blinking On BS1 BS2 BS3 Press buttons BS1 Menu or back button BS2 UP button BS3 Spot check and confirm button Remarks Press or tip any directions are valid Step4 Query Setting mode Step1 Press BS1 to enter query setting mode SEG1 SEG2 SEG3 Step2 Press BS2 to select item n05 for this case SEG1 SEG2 SEG3 Step3 Press BS3 to check the current setting n05 1 ...

Страница 30: ...es the right to change specifications or designs without notice 10 2019 ESI Ultra Service Manual www ecoer com 25 68 Press BS3 to Step 2 interface for other setting check SEG1 SEG2 SEG3 Press BS1 to return SEG1 SEG2 SEG3 ...

Страница 31: ...r and eliminateany obstacles Check refrigerant amount or any leaks Counterclockwise the TXV Make surethe refrigerant coefficient is 0 6 System cannot heat well Outside temperature is too low butno third party heat inside The outdoor coil is dirty or hasbeen covered by heavy snow Dirty air filter Micro channel MC coil has been used Lack of refrigerant Install auxiliary heat for backup Dual heating ...

Страница 32: ... connected to P2 and P3 terminals use multi meter to check if the inductance is open Resistance is infinite YES NO Confirm if the cable connected to CN21 behind the black plastic is firmly fastened NO YES YES NO The display lights ON after unplug low pressure sensor cable terminal from CN9 YES NO The display lights ON after unplug high pressure sensor terminal from CN10 YES NO Replace the main con...

Страница 33: ...t Ecoer Air Conditioner SW1 3 ON AC SW1 3 OFF HP SW1 Optional Other Brand Thermostat Cool Only Ecoer variable speed air conditioner Dip ODU SW1 3 to ON matches with fan coil 1 2 3 4 DIP ON Fan Coil W2 C W1 G Y2 Other Brand Thermostat Ecoer Condensing Unit Heat Pump Y1 W2 W1 RH RC Optional Other Brand Thermostat 1H 1C Ecoer variable speed heat pump matches with fan coil ...

Страница 34: ...coer com 28 68 Fan Coil Other Brand Thermostat Ecoer Condensing Unit Heat Pump Optional Other Brand Thermostat 2H 1C Ecoer variable speed heat pump matches with fan coil Fan Coil Other Brand Thermostat Ecoer Condensing Unit Heat Pump Optional Other Brand Thermostat 3H 1C Ecoer variable speed heat pump matcheswith fan coil ...

Страница 35: ...r W2 SW1 3 ON AC SW1 3 OFF HP Y1 W1 RC SW1 RH Optional Other Brand Thermostat 1H 1C Ecoer variable speed air conditioner Dip ODU SW1 3 to ON matches with furnace and coil 1 2 3 4 DIP ON Furnace Other Brand Thermostat Ecoer Air Conditioner SW1 3 ON AC SW1 3 OFF HP Optional SW1 Other Brand Thermostat 2H 2C Ecoer variable speed air conditioner Dip ODU SW1 3 to ON matches with furnace and coil 1 2 3 4...

Страница 36: ... ecoer com 30 68 Furnace Other Brand Thermostat Ecoer Condensing Unit Heat Pump Optional Other Brand Thermostat 2H 1C Ecoer variable speed heat pump matcheswith furnace Furnace Other Brand Thermostat Ecoer Condensing Unit Heat Pump Optional Other Brand Thermostat 3H 2C Ecoer variable speed heat pump matcheswith furnace ...

Страница 37: ...C RH RC W O O W2 Y G C Y1 SW1 SW1 3 ON AC SW1 3 OFF HP G2 EST01 Wi Fi Thermostat R C W1 G W2 Ecoer Air Condtioner G Series Air Handler or Other Brand Fan Coil Ecoer Thermostat EST01 Type 2 Cool Only W2 output 1H 1C Ecoer variable speed air conditioner matches with gas or oil furnace C RH RC W O O W2 Y G C Y1 Optional SW1 SW1 3 ON AC SW1 3 OFF HP G2 EST01 Wi Fi Thermostat R C W1 G W2 Ecoer Air Cond...

Страница 38: ...Manufacturer reserves the right to change specifications or designs without notice 10 2019 ESI Ultra Service Manual www ecoer com 32 68 Furnace ...

Страница 39: ...at pump Require O Signal input matches with fan coil Optional C RH RC W O O W2 G Y1 G2 EST01 Wi Fi Thermostat R C W1 G W2 Y C Ecoer Condensing Unit Heat Pump G Series Air Handler or Other Brand Fan Coil Ecoer Thermostat EST01 Type 8 1H 1C with constant indoor fan speed Ecoer variable speed heat pump matches with fan coil Optional C RH RC W O O W2 G Y1 G2 EST01 Wi Fi Thermostat R C W1 G W2 Y C Ecoe...

Страница 40: ...Manufacturer reserves the right to change specifications or designs without notice 10 2019 ESI Ultra Service Manual www ecoer com 34 68 G Series Air Handler or Other Brand Fan Coil ...

Страница 41: ...heat pump matches with E Series air handler Optional C RH RC W O O W2 G Y1 G2 EST01 Wi Fi Thermostat R C W1 G W2 G2 Y C Ecoer Condensing Unit Heat Pump E Series Air Handler Ecoer Thermostat EST01 Type 10 2H 1C with constant indoor fan speed Factory default Ecoer variable speed heat pump matches with fan coil for 2 stageheating Optional C RH RC O W2 G Y1 G2 EST01 Wi Fi W O Y C Ecoer Condensing Unit...

Страница 42: ...Manufacturer reserves the right to change specifications or designs without notice 10 2019 ESI Ultra Service Manual www ecoer com 36 68 G Series Air Handler or Other Brand Fan Coil ...

Страница 43: ...Optional C RH RC W O O W2 G Y1 G2 EST01 Wi Fi Thermostat R C W1 G W2 G2 Y C Ecoer Condensing Unit Heat Pump E Series Air Handler Ecoer Thermostat EST01 Type 12 13 Cool only with two stage fan control G G2 Ecoer variable speed Air Conditioner matches with E Series air handler Type 12 and electric heat Type 13 Wiring between EST01 W2 to Air Handler W1 must be connected C RH RC W O O W2 Y G C Y1 Opti...

Страница 44: ...Manufacturer reserves the right to change specifications or designs without notice 10 2019 ESI Ultra Service Manual www ecoer com 38 68 E Series Air Handler ...

Страница 45: ...tes Cannot restart 1 P9 Incorrect compressor line sequence Cannot restart 1 44 PA DC fan motor over load protection Cannot restart 1 45 F1 Ambient temperature TA sensor fault Backup running 2 46 F2 Compressor suction temperature TS sensor fault Backup running 2 47 F3 Liquid line temperature TL sensor fault Backup running 2 48 F4 Defrost temperature TH sensor fault Backup running 2 49 F5 Compressor...

Страница 46: ...N stops in heating Damaged high pressure sensor Damaged main control board YES Satisfy any contents above Correct specific point Whether the low pressure has been evacuated NOTE3 NO NOTES 1 It s normal control if heating oil return operation is enforced to execute even though the Y signal OFF Indoor fan stops because there is No G signal Or connect R and G together to judge if the fan works Yes Re...

Страница 47: ... 2 Connect a pressure gauge to gauge port compare the difference between the gauged pressure and the transduced one by low pressure sensor spot check by BS3 button or check the data from ESS Pro App 3 Abnormal TXV will lead to the refrigerant blockage in the high pressure side Display or Low pressure protection in cooling mode Check visible parts for the system 1 Closed service valve 2 Dirty indoo...

Страница 48: ...ssor discharge temperature TD protection NO YES Check whether the compressor discharge temperature sensor is properly seated on the discharge pipe and securely connected to CN7 terminal on the main control board NO YES Turn off the power supply to unplug the TD sensor check if the NO resistance is in the range of Temperature sensor B TIPS YES Use AUTO charge mode in cooling or monitor DSH in heati...

Страница 49: ...r heat sources around the sensor TIPS Technically measure the DC voltage of the temperature sensor also works when outdoor unit powers on Display Compressor discharge temperature TD sensor is disconnected or damaged Check whether TD sensor is seated to the compressor discharge pipe and securely connected to CN7 terminal on the main control board NO YES Turn off the power supply to unplug the TD se...

Страница 50: ...nd blocked outdoor heat exchanger Damaged TF sensor Misjudgment caused by resistance drift of TF sensor Damaged main control board TIPS Technically measure the DC voltage of the temperature sensor also works when outdoor unit powers on Display or Inverter module temperature TF protection YES NO Is the radiator fin in the back of control box dirty or corroded resulting in poor performance YES NO Ch...

Страница 51: ...OTE Normal resistance for compressor 3 phase resistance UV UW VW for compressor is less than5Ω The insulation resistance any phase to Ground for compressor is greater than 100KΩ Display or Compressor over currentprotection YES NO Can the system restart when the differential of high pressure and YES low pressure HP LP is less than 29psig NO NO YES YES NO Replace the main control board Replace the c...

Страница 52: ...gauge at the gas service valve to calculate suction line superheat Display or Liquid slugging protection Check whether the discharge temperature sensor is properly NO seated on the compressor discharge pipe and securely connected to CN7 terminal on the main control board YES NO YES NO YES Check the pressure transduction based on Low Pressure Sensor NO Voltage Characteristics C Does the low pressur...

Страница 53: ...ays a flashing 8 to pump down the refrigerant from outdoor unit to indoor unit The low pressure LP cannot be pumped down resulting in too low SH NO Check the compressor discharge superheat DSH NOTE to judge if there is too much refrigerant in the system NO YES YES NO YES NOTE Heating DSH should be between 25 F and 50 F with proper refrigerant charge in normalcontrol Overcharged DSH is smaller than...

Страница 54: ...e g less than175VAC YES Check if there are any other high power consumption facilities sharing the same power supply NO Replace the main control board Contact power supply agency to verify that they are sending the correct voltage Display Incorrect compressor line sequence Use ESS Pro App or BS3 button to check high pressure and low pressure values Are they approximately equal in stop condition NO...

Страница 55: ...d main control board NOTE The normal working state of IoT device should be blue LED No 1 is blinking with other LEDs are off LEDs Display DC fan motor over loadprotection Had the IoT device successfully communicated with Ecoer cloud after installation NOTE NO YES YES NO NO YES Turn off power supply for at least five minutes use tools to rotate fan blades manually to check if the motor shaft is stu...

Страница 56: ...round the sensor YES Are there any other heat sources around the sensor NO TIPS Measure the DC voltage of the temperature sensor also works when outdoor unit powers on How to take out the protection cover for TA sensor Display Ambient temperature TA sensor fault NO Check whether TA sensor is seated to the specified location and connected to CN2 on the main control board NO YES Turn off the power s...

Страница 57: ...oltage of the temperature sensor also works when outdoor unit powers on Display Compressor suction temperature TS sensor fault Check whether TS sensor is seated to the compressor suction pipe and connected to CN2 on the main control board NO YES Turn off the power supply unplug the TS sensor to check if the resistance is in the range of Temperature sensor A NOTE NO YES YES NO YES NO Replace the ma...

Страница 58: ...DC voltage of the temperature sensor also works when outdoor unit powers on Display Liquid line temperature TL sensor fault Check whether TL sensor is seated to the specified location and connected to CN4 on the main control board NO YES Turn off the power supply unplug the TL sensor to check if the resistance is in the range of Temperature sensor A NOTE NO YES YES NO YES NO Replace the main contr...

Страница 59: ...he DC voltage of the temperature sensor also works when outdoor unit powers on Display Defrost temperature TH sensor fault Check whether TH sensor is seated to the specified location and connected to CN4 on the main control board NO YES Turn off the power supply unplug the TH sensor to check if the resistance is in the range of Temperature sensor A NOTE NO YES YES NO YES NO Replace the main contro...

Страница 60: ... the temperature sensor also works when outdoor unit powers on Display Compressor discharge temperature TD sensor fault Check whether TD sensor is seated to the compressor discharge pipe and connected to CN7 on the main control board NO YES Turn off the power supply unplug the TD sensor to check if the resistance is in the range of Temperature sensor B NOTE NO YES YES NO YES NO Replace the main co...

Страница 61: ...n The module temperature TF sensor is short circuit or open circuit 2 Possible causes Damaged main control board Loose connection at port on main control board Temperature sensor failure There are other heat sources around the sensor NOTES 1 Measure the DC voltage of the temperature sensor also works when outdoor unit powers on 2 TF senor has been laid inside the assembly control box with silicon ...

Страница 62: ... Damaged high pressure sensor Too little refrigerant remains in the system NO Display High pressure HP sensor fault Check if the high pressure sensor HP connected to CN10 on the main control board NO YES NO YES YES NO Can the pressure transduce properly based on High Pressure Sensor Voltage Characteristics D NOTE NO YES Can the system go into backup running SEG1 displays digital 1 YES Replace the ...

Страница 63: ...ra Service Manual www ecoer com 53 68 NOTE Connect a pressure gauge to liquid service valve in cooling mode gas service valve in heating mode Compare the value difference between gauged pressure and the transduced one by high pressure sensor spot check by BS3 button or check the data from ESS ProApp ...

Страница 64: ...aged low pressure sensor Too little refrigerant remains in the system Display Low pressure LP sensor fault Check if the low pressure sensor LP connected to CN9 on the main control board NO YES NO YES YES NO Can the pressure transduce measure properly according to Low Pressure Sensor Voltage Characteristics C NOTE NO YES YES NO Replace the main control board Can the system go into backup running SE...

Страница 65: ... without notice 10 2019 ESI Ultra Service Manual www ecoer com 55 68 NOTE Connect a pressure gauge to gauge port compare the difference between the gauged pressure and the transduced one by low pressure sensor spot check by BS3 button or check the data from ESS Pro App ...

Страница 66: ...inverter chip 2 Possible causes Loose connection at CN21 terminal Damaged main control board CN21 Display Communication fault between main chip and INV drive chip YES Turn off the power supply for five minutes Unfasten three screws to take out the black plastic then reconnect the cable to CN21 Turn on the power to check if the faultremains NO External factor other than error e g noise interference...

Страница 67: ... within the range of operation Check whether there are other heat sources around TA sensor Display or Ambient temperature limit operation NO Check whether the ambient temperature sensor TA is seated to the specified location and connected to CN2 of PCB NO YES Turn off the power supply unplug TA sensor to check if the resistance is in the range of Temperature sensor A NOTE NO YES Replace the main c...

Страница 68: ...or reversing valve The power supply voltage is less than 175VAC Check the voltage between L1 and L2 CN18 19 YES NO Is the input on connector CN14 reversing valve the similar AC NO voltage with the power input in heating mode YES YES NO Turn off power supply for five minutes replace the coil of reversing valve and restart the system does the problemremain NO YES YES NO Recover the refrigerant and r...

Страница 69: ...age of the temperature sensor also works when outdoor unit powers on Display Defrost temperature TH sensor is disconnected or damaged Check whether TH sensor is seated to the specified location and NO connected to CN4 on the main control board YES Turn off the power supply unplug the TH sensor to check if the resistance is in the range of Temperature sensor A NOTE NO YES YES NO YES NO Replace the ...

Страница 70: ...up oil return or defrost 2 Possible causes Abnormal signal input from thermostat Display EEPROM fault Turn off the power supply for five minutes then turn on the power supply to check if the system goes back tonormal YES NO Replace the main control board External interference e g electromagnetic Display Low voltage alarm The power supply voltage is less than 175VAC Check the voltage between L1 and...

Страница 71: ...sor speed inconsistent fault C9 Compressor speed difference between given transient variation and actual operation CA AC over voltage protection CB AC under voltage protection CC PFC error E0 System locks up when C0 CA has occurred three times in 60 minutes 2 Possible causes Abnormal power supply voltage Power supply disconnected C2 C7 C9 or C2 C3 C7 report at the sametime Dirty compressor termina...

Страница 72: ...S NO YES NO Turn off the power supply to replace the main control board Restart the unit does the error code disappear NO YES Back to normal Replace the compressor Clean the terminal Are there any dirty things on the compressor terminal Replace the compressor Is the compressor open circuited NOTE Reconnect the wiring Are the compressor wirings U V W securely connected Replace the indoor coil Has t...

Страница 73: ...e Quantity Parts number Remark 2436 4860 1 Condenser ass y 1 231235269 231235477 1 1 Condenser connection pipe ass y 1 231235268 1 2 Condenser 1 231235270 231235271 1 3 Condenser outlet pipe ass y 1 231235085 231235153 1 4 Condenser inlet pipe ass y 1 231235084 231235154 2 Fan 1 230801635 3 Guide ring 1 230700850 4 Brushless DC Motor 1 230904010 5 Motor installation board ass y 1 230803381 6 Top c...

Страница 74: ...5471 14 3 High pressure sensor 1 231235159 Black color 14 4 reversing valve 1 231235077 231235079 231235078 231235079 231235077 valve body 231235078 valve body 231235079 valve coil 14 5 Low pressure sensor 1 231235158 Green color 15 Suction pipe ass y 1 231235421 231235149 16 Refrigerant accumulator 1 231236288 231236289 17 Chassis Parts 1 230803293 18 Lower side plate 1 230803138 230803139 19 Com...

Страница 75: ...2 30 29 84 2 8 35 2 33 30 86 7 98 2 36 31 87 8 7 64 2 39 32 89 6 7 31 2 42 33 91 4 6 99 2 44 34 93 2 6 70 2 47 35 95 6 41 2 50 36 96 8 6 14 2 52 37 98 6 5 89 2 55 38 100 4 5 64 2 57 39 102 2 5 41 2 60 40 104 5 19 2 62 41 105 8 4 97 2 64 42 107 6 4 77 2 66 43 109 4 4 58 2 69 44 111 2 4 39 2 71 45 113 4 22 2 73 46 114 8 4 05 2 74 47 116 6 3 89 2 76 48 118 4 3 74 2 78 49 120 2 3 59 2 80 50 122 3 45 2...

Страница 76: ...26 32 2 12 44 111 2 25 30 2 15 45 113 24 32 2 17 46 114 8 23 38 2 20 47 116 6 22 49 2 23 48 118 4 21 63 2 26 49 120 2 20 81 2 29 50 122 20 02 2 31 51 123 8 19 27 2 34 52 125 6 18 55 2 37 53 127 4 17 86 2 39 54 129 2 17 20 2 42 55 131 16 57 2 44 56 132 8 15 96 2 46 57 134 6 15 38 2 49 58 136 4 14 82 2 51 59 138 2 14 29 2 53 60 140 13 77 2 55 61 141 8 13 28 2 57 62 143 6 12 81 2 59 63 145 4 12 36 2 ...

Страница 77: ... 21 14 1 38 0 46 66 7 20 32 1 42 0 48 69 6 19 54 1 46 0 50 72 5 18 81 1 50 0 52 75 4 18 11 1 54 0 54 78 3 17 45 1 58 0 56 81 2 16 82 1 62 0 58 84 1 16 22 1 66 0 61 88 5 15 37 1 72 0 63 91 4 14 84 1 76 0 65 94 3 14 33 1 80 Low pressure MPa Low pressure psig Resistance KΩ Output voltage V 0 68 98 6 13 61 1 86 0 70 102 13 15 1 90 0 73 106 12 50 1 96 0 76 110 11 89 2 02 0 78 113 11 50 2 06 0 81 117 10...

Страница 78: ...7 5 14 27 1 80 1 6 232 13 25 1 89 1 7 246 5 12 31 1 98 1 8 261 11 45 2 07 1 9 275 5 10 66 2 15 2 0 290 9 94 2 24 2 1 304 5 9 26 2 33 2 2 319 8 64 2 41 2 3 333 5 8 06 2 50 2 4 348 7 52 2 59 2 5 362 5 7 01 2 67 2 6 377 6 54 2 76 2 7 391 5 6 09 2 85 2 8 406 5 67 2 93 2 9 420 5 5 28 3 02 3 0 435 4 90 3 11 High pressure MPa High pressure psig Resistance KΩ Output voltage V 3 1 449 5 4 55 3 20 3 2 464 4...

Страница 79: ...Manufacturer reserves the right to change specifications or designs without notice 10 2019 ESI Ultra Service Manual www ecoer com 67 68 5 2 Wiring Diagram EODA18H 2436 ...

Страница 80: ...Manufacturer reserves the right to change specifications or designs without notice 10 2019 ESI Ultra Service Manual www ecoer com 68 68 EODA18H 4860 ...

Страница 81: ...ESI Ultra Service Manual 69 68 www ecoer com Manufacturer reserves the right to change specifications or designs without notice 10 2019 ...

Страница 82: ...ce Manual 70 68 www ecoer com 2017 2019 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 10 2019 ...

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