ecoer R-410A Heat Pump Inverter Ducted Split Instruction Manual
- June 1, 2024
- ecoer
Table of Contents
R-410A Heat Pump Inverter Ducted Split
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Specifications:
- Product: Ecoer TDi Pro ODU IM
- Type: Inverter Ducted Split Heat Pump
- Capacity: 2-5 Ton
- Refrigerant: R-410A
Product Usage Instructions:
Safety:
Before installing or servicing the unit, read and adhere to the
following safety instructions:
-
WARNING: Failure to disconnect all electric
power before servicing may result in property damage, personal
injury, or death. -
CAUTION: Exercise extreme caution when opening
the liquid service valve to prevent system charge release. -
WARNING: Grounding is essential before
connecting electrical supply to prevent property damage or personal
injury.
Authorized Personnel Only:
Individuals with adequate electrical and mechanical experience
should handle installation and repairs. Unauthorized attempts may
lead to personal injury or property damage.
Indoor Unit Requirements:
Equip indoor units with adjustable TXV/EEV suitable for R-410A
heat pump. Ensure proper functionality by verifying superheat in
cooling. Avoid using microchannel coils for heat pump systems as
they are suitable for cooling only.
Hot Surface:
Avoid touching the top of the compressor to prevent minor to
severe burns which can result in property damage or personal
injury.
Grounding Requirement:
Reconnect all grounding devices after service to prevent
equipment damage or personal injury. Ensure all components capable
of conducting electrical current are properly grounded.
FAQ:
Q: Can I use soldered joints for existing refrigerant
lines?
A: No, it is recommended to use brazed joints instead of
soldered joints to avoid equipment damage or personal injury.
Q: What should I do if I encounter high current leakage?
A: Grounding is essential before connecting electrical supply to
prevent property damage, severe personal injury, or death.
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ECOER INC.
NOTE: Appearance of unit may vary.
Installation must be performed in accordance with the requirements of NEC and
CEC by authorized personnel only.
Installation Manual
Inverter Ducted Split 2-5 Ton R-410A Heat Pump
Contents
1. Safety———————————————–2-2. Unit Location Considerations——————43. Position
the Unit———————————-74. Refrigerant Line Considerations————–85. Refrigerant
Line Routing———————-1–0 6. Refrigerant Line Brazing———————–1-17. System Leak
Check——————————1–2 8. Evacuation—————————————–1-2 9. Service
Valves————————————-1-310. Electrical – Low Voltage————————-1-311. Electrical –
High Voltage————————1–5 12. Start-up——————————————–1–6 13. System Charge
Adjustment——————–1–7 14. System Operation——————————–2–3 15.
Troubleshooting———————————3–1 16. Wiring Diagram——————————– 33
All phases of this installation must comply with National, State and Local
Codes.
This document is customer’s property and is to remain with this unit. Please
return it to customer with service information upon completion of work. These
instructions do not cover all variations in systems or provide for every
possible contingency to be met in connection with the installation. 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 your installing dealer or local distributor.
Manufacturer reserves the right to change specifications or designs without notice.
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1. Safety
Read the following safety instructions before installing the unit or doing
servicing work.
WARNING may cause personal death or serious injury. CAUTION may lead to injury or structural damage under some conditions.
ECOER INC.
WARNING
HAZARDOUS VOLTAGE Failure to follow this warning could result in property
damage, severe personal injury, or death. Disconnect all electric power,
including remote disconnections before servicing. Follow proper lockout/
tagout procedures to ensure the power cannot be inadvertently energized.
REFRIGERANT OIL Any attempt to repair central air conditioner and heat pump
products may result in property damage, severe personal injury, or death.
These units use R-410A refrigerant which operates at 50~70% higher pressures
than R-22. Use only R410A approved service equipment. Refrigerant cylinders
are painted a “Rose” color to indicate the type of refrigerant and may contain
a “dip” tube to allow for charging of liquid refrigerant into the system. All
R-410A systems with variable speed compressors use a PVE oil that readily
absorbs moisture from the atmosphere. To limit this “hygroscopic” action, the
system should remain sealed whenever possible. If a system has been open to
the atmosphere for more than 4 hours, the compressor oil must be replaced.
Never break a vacuum with air and always change the driers when opening the
system for component replacement. PVE oil is not just a lubricant but also a
great solvent! It will quickly move any contaminants from the old line sets
and plug up components like TXV, strainer and service valves. When replacing
R-22 system with a new R-410A system, use flush (e.g. Rx11) to remove the old
mineral oil, sludge, moisture, acid and other contaminants out of the system.
SERVICE VALVES Failure to follow this warning will result in abrupt release of
system charge and may result in personal injury and/or property damage.
Extreme caution should be exercised when opening the liquid service valve.
Turn valve stem counterclockwise only until the stem contacts the rolled edge.
No torque is required.
BRAZING REQUIRED Failure to inspect refrigerant lines or use proper service
tools may result in equipment damage or personal injury. If using existing
refrigerant lines, make sure that all joints are brazed, not soldered.
HIGH CURRENT LEAKAGE Failure to follow this warning could result in property
damage, severe personal injury, or death. Grounding is essential before
connecting electrical supply.
Manufacturer reserves the right to change specifications or designs without notice.
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ECOER INC.
CAUTION
AUTHORIZED PERSONNEL ONLY This information is intended for use by individuals
possessing adequate backgrounds of electrical and mechanical experience. Any
attempt to repair central air conditioner or heat pump products may result in
personal injury and/or property damage.
INDOOR UNIT REQUIRMENT It is recommended to equip indoor units with adjustable
TXV/EEV for R-410A heat pump. The model of TXV/EEV should be suitable for the
system capacity and should be with internal check valves for heat pump, which
can be verified to work properly by checking superheat in cooling.
No micro channel coil shall be used for heat pump. Micro channel coils are
suitable for cooling only system.
HOT SURFACE May cause minor to severe burning. Failure to follow this caution
could result in property damage or personal injury. Do not touch top of
compressor.
GROUNDING REQUIRED
Failure to inspect or use proper service tools may result in equipment damage
or personal injury. Reconnect all grounding devices. All parts of this product
that are capable of conducting electrical current are grounded. If grounding
wires, screws, straps, clips, nuts, or washers used to complete a path to
ground are removed for service, it must be returned to their original position
and properly fastened.
CONTAINS REFRIGERANT Failure to follow proper procedures can result in
personal illness or injury or severe equipment damage. System contains oil and
refrigerant under high pressure. Recover refrigerant to relieve pressure
before opening the system.
Manufacturer reserves the right to change specifications or designs without notice.
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2. Unit Location Considerations
2.1 Inspect Units
Units are packaged for shipment to avoid damage during normal transit and
handling. It is the receiving party’s responsibility to inspect the equipment
upon arrival. Any obvious damage to the carton box should be reported on the
bill of lading and a claim should be filed with the transportation company,
and the factory should be noticed.
All units should be stored in the factory shipping carton with internal packaging in a dry place until installation. Carefully remove the packaging and inspect for hidden damage. Any hidden damage should be recorded and the factory should be notified. The gauge port can be used to check the refrigerant charge has been retained during shipment.
2.2 Unit Dimensions
Two models sharing the same chassis are suit for most residential air
conditioner and heat pump applications.
ECOER INC. Fig 2-1 Check damage
Table 2-1 Condensing unit dimensions
Unit Dimensions
Model
H x W x D (Inches)
H
2436
24-15/16 x 29-1/8 x 29-1/8
4860
33-3/16 x 29-1/8 x 29-1/8
D
2.3 Location Restrictions
Fig 2-2 External dimensions
Exposure to a corrosive environment may shorten the life of the equipment,
corrode metal parts, and/or negatively affect unit performance. Corrosive
elements include, but are not limited to: sodium chloride, sodium hydroxide,
sodium sulfate, and other compounds commonly found in ocean water, sulfur,
chlorine, fluorine, fertilizers, and various chemical contaminants from
industry/manufacturing plants. If installed in areas which may exposed to
corrosive environments, special attention should be given to the equipment
placement and maintenance. · Lawn sprinklers/waste water should not spray
directly on the unit cabinet for prolonged periods. · In coastal areas: The
outdoor unit should be installed at a location that is at least 1000 feet away
from
the coast and on the side of the building that is farthest from the coast.
Manufacturer reserves the right to change specifications or designs without notice.
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ECOER INC.
Installation Clearance Requirement
Ensure the top discharge area is unrestricted for at least 60 inches above the
unit.
Avoid to install near bedrooms
Do not locate condensing unit near bedrooms because normal operational sounds
may be annoying. Position unit to allow adequate space for unobstructed
airflow, wiring, refrigerant lines, and serviceability.
Allow a minimum of 12 in. clearance on one side of access panel to a wall and
a minimum of 24 in. on the adjacent side of access panel. Maintain a distance
of 24 in. between units.
Min. 12″ to shrubbery
Min. 60″unrestricted
Min. 24″ unrestricted
Access panel
Fig 2-3 Clearance requirement
Position unit so water, snow, or ice from roof or overhang cannot fall directly on unit.
Min. 12″ to shrubbery
Min. 24″ to wall
Access panel
Fig 2-4 Unit location
Manufacturer reserves the right to change specifications or designs without notice.
Feb. 2024
Ecoer TDi Pro ODU IM
Cold Climate Considerations
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Precautions must be taken for units being installed in areas where snow
accumulation and prolonged below-freezing temperatures occur.
Elevate unit per local climate and code requirements.
· Where snowfall is anticipated, raise the unit above the base pad to prevent
ice buildup and coil damage. Mount the unit high enough to be above the
average accumulated area snowfall.
· If unit must be elevated because of anticipated snowfall, secure unit and
elevating stand such that unit and/or stand will not tip over or fall off.
A snow drift barrier should be installed around the unit to prevent a build-up
of snow on the unit sides.
ECOER INC. Fig 2-5 Consideration to prevent refreezing
Snow Guard Kit Cautions
No kit shall damage the top panel of condensing unit.
· Main control board (MCB) will be damaged due to the rainwater flow into the
control box.
· The condensing coil will be broken resulting in refrigerant leak.
In areas prone to blizzards and freezing rain, it is advisable to install a
snow guard for added protection.
Fig 2-6 Snow Guard Kit
Manufacturer reserves the right to change specifications or designs without notice.
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3. Position the Unit
When mounting the unit on a roof, be sure the roof will support the unit’s weight obtained from nameplate.
Properly selected isolation is recommended to prevent sound or vibration transmission to the building structure. If elevating a unit on a flat roof, use 4″ x 4″ or equivalent stringers positioned to distribute unit weight evenly and prevent noise and vibration.
When installing the unit on a support pad, such as a concrete slab, consider the following:
· The pad must be 1~2″ larger than the unit on all sides. · The pad must be
separated from any structure.
· The pad must be level.
· The pad must be high enough above grade to allow for drainage.
· The pad location must comply with National, State and Local codes.
ECOER INC. Fig 3-1 Position the unit on pad
IMPORTANT NOTE: These instructions are intended to provide a method to tie- down unit to cement slab as a securing procedure for high wind areas. Check local codes for tie-down methods and protocols.
Refer to the unit dimensions. DETAIL A
7 × 3/8″ self tapping screws (Do not exceed 3/8″ length.)
DETAIL A
Brackets:
2″ width, 1/16″ thickness, height as required. Available from distributor or
in market store.
1/4″ × 1-1/2″ hex washer head concrete screws (3/16″ pilot hole needed. Pilot
hole should be1/4″ deeper than the fastener embedment.)
Fig 3-2 Fasten the condensing unit
Manufacturer reserves the right to change specifications or designs without notice.
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ECOER INC.
4. Refrigerant Line Considerations
4.1 Refrigerant Line Limits
Use only the line sizes indicated in below table and determine required line
length. If the suction line sets are greater than 50 feet, do not use a larger
suction line than recommended.
Table 4-1 Line sizes and maximum lenghth
Liquid
Suction
Model
Line
Line
25
Total Equivalent Length (FT)
50
75
100
125
150
Dimensions in inches
Maximum Elevation Difference (FT)
3/8 Std. 3/4 Std.
25
50
45
40
30
25
2Ton
1/4 Opt. 5/8 Opt.
25
50
40
30
30
25
3/8 Std. 3/4 Std.
25
50
50
50
35
25
3Ton
1/4 Opt. 5/8 Opt.
25
50
45
40
35
25
4Ton
7/8 Std.
25
50
50
40
30
25
3/8
3/4 Opt.
25
50
50
40
30
25
7/8 Std.
25
50
50
40
30
25
5Ton
3/8
3/4 Opt.
25
50
50
40
30
25
1-1/8 Opt. 25
40
N/A
N/A
N/A
N/A
Std.: Standard line size; Opt.: Optional line size; N/A: Application not recommended
· Maximum line length = 150 feet.
· Maximum elevation difference = 50 feet.
Max.50ft
Max.150ft Fig 4-1 Line length limit
Max.50ft
Manufacturer reserves the right to change specifications or designs without notice.
Fig 4-2 Elevation difference limit
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4.2 Refrigerant Line Insulation
The suction line must always be insulated.
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Liquid line
DO NOT allow the suction line and liquid line to come in direct (metal to metal) contact.
ECOER INC.
Suction line Insulation
4.3 Reuse Existing Refrigerant Lines
CAUTION
If using existing refrigerant lines, make sure that all joints are brazed, not
soldered.
For retrofit applications where the existing refrigerant lines will be used,
the following precautions should be taken:
· Ensure that the refrigerant lines are the correct size according to Table
4-1. It’s not recommended to use suction line bigger than standard size, in
which will result poor oil return for inverter compressor.
· Ensure that the refrigerant lines are free of leaks, acid and mineral oil.
When replacing R-22 system with a new R-410A system, be sure the existing
lines can endure R-410A pressure which is 50~70% higher than R-22 system. Use
flush (e.g. Rx11) to remove the old mineral oil, sludge, moisture, acid and
other contaminants out of the line set.
Fig 4-3 Line insulation Fig 4-4 Use existing refrigerant lines
IMPORTANT:
The manufacturer recommends installing only approved matched indoor and
outdoor systems. All of the manufacturer’s split systems are AHRI rated with
TXV indoor units. Some of the benefits of installing approved matched indoor
and outdoor split systems are maximum efficiency,
optimum performance and the best overall system reliability.
Manufacturer reserves the right to change specifications or designs without notice.
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ECOER INC.
5. Refrigerant Line Routing
Comply with National, State, and Local Codes when isolating line sets from
joists, rafters, walls, or other structural elements. Take precautions to
prevent noise within the building structure due to vibration transmission from
the refrigerant lines. For Example:
· Use isolation type hangers when the refrigerant lines have to be fastened to
floor joists or other framing. · Isolation hangers should also be used when
refrigerant lines traverse stud spaces or enclosed ceilings. · Where the
refrigerant lines pass through a wall or sill, it should be insulated and
isolated. · Isolate the lines from all ductwork. · Minimize the number of 90º
turns.
8 Feet Maximum
Isolator
Joist/Rafter
Line Set
Side View
8 Feet Maximum
Secure suction line from joists using isolators every 8 ft. Secure liquid line directly to insulated suction line using tape, wire, or other appropriate method every 8 ft.
Fig 5-1 Isolation from Joist/Rafter
8 Feet Maximum
Isolator Wall Line Set
Side View
8 Feet Maximum
Secure suction line using isolators every 8 ft. Secure liquid line directly to insulated suction line using tape, wire, or other appropriate method every 8 ft.
Fig 5-2 Isolation in wall spaces
Sealant Wall
Insulation Suction line
Isolator Ductwork Line Set
Fig 5-3 Isolation through wall
Fig 5-4 DO NOT hang line sets from ductwork
Manufacturer reserves the right to change specifications or designs without notice.
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ECOER INC.
6. Refrigerant Line Brazing
Refer to below figures marked with digital number for line brazing procedures.
Every figure is corresponding to the following illustrations. 1. Remove caps
or plugs. Use a tool to deburr the line ends. Clean both internal and external
surfaces of the
tubing using an emery cloth. 2. Remove the pressure tap cap from both service
valves. 3. Purge the refrigerant lines and indoor coil with dry nitrogen from
gas service valve. 4. Wrap a wet rag around the service valve body to avoid
heat damage and continue the dry nitrogen purge.
Braze the refrigerant lines to the service valves. Install a bidirectional
filter drier (NO active alumina allowed) in liquid line to protect the heat
pump. Do not remove the wet rag until all brazing is completed. 5. Put the
pressure tap caps back after the service valves cooled down.
A thimble is required
Field install 3~4″ from valve
Fig 6-1 Refrigerant line brazing work Manufacturer reserves the right to change specifications or designs without notice.
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7. System Leak Check
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Leak check is required for the brazed line connections. 1. Pressurize the brazed refrigerant lines and indoor coil to at least 450 PSIG using dry nitrogen. 2. Wait for 10 minutes without a drop in pressure. 3. Check for leaks by using a soapy solution or bubbles at each brazed location.
450PSIG
ECOER INC.
Fig 7-1 Charge dry nitrogen to the system
Fig 7-2 Leak check
8. Evacuation
Do not open the service valves until the leak check and evacuation are complete. 1. The vacuum should be pulled for at least 45 minutes. 2. Evacuate until the micron gauge reads less than 350 microns, then close the valve to the vacuum pump. 3. Evacuation is complete if the micron gauge does not rise above 500 microns in 10 minutes.
10 MIN
Fig 8-1 Evacuation the refrigerant system Manufacturer reserves the right to change specifications or designs without notice.
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ECOER INC.
9. Service Valves
Leak check and evacuation must be completed before opening the service valves.
The gas service valve must be opened BEFORE opening the Liquid Service Valve!
1. Remove service valve cap. 2. Fully insert hex wrench into the stem and
counterclockwise until valve stem just touches the rolled edge
(approximately five turns.) 3. Replace and tighten the valve stem cap to
prevent leaks. Additional 1/6 turn may be required.
Repeat 1 to 3 for Liquid Service Valve.
Cap
WARNING
Extreme caution should be exercised when opening the Liquid Service Valve.
Turn counterclockwise until the valve stem just touches the rolled edge. No
torque is required.
Failure to follow this will result in abrupt release of system charge and may
lead to personal injury and /or property damage.
3/16″ Hex Wrench for Liquid Service Valve 5/16″ Hex Wrench for gas service
Valve
Rolled edge to captivate stem
Service Port Fig 9-1 Open the service valves
10. Electrical Low Voltage
10.1 Low voltage wire requirement
Define the maximum length of low voltage wiring from condensing unit to indoor
unit and thermostat. Field installed electrical conduit is required at the low
voltage wire entry point. Animals like frogs, snakes, spiders and others may
climb into the control box resulting in the MCB damage. Manufacturer reserves
the rights to reject warranty claim on MCB if not comply.
Table 10-1 Low voltage control wiring requirement
CONTROL WIRING
Wire Size
Max. Wire Length
18 AWG
150Ft
16 AWG
225Ft
Manufacturer reserves the right to change specifications or designs without notice.
Fig 10-1 Sealing requirement Feb. 2024
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10.2 Low voltage hook-up diagrams
ECOER INC.
BLUE GREEN RED BLACK/BROWN WHITE VIOLET YELLOW ORANGE BLACK YELLOW ORANGE WHITE
W2 W* O C R Y1 G Y2 DH (G2) THERMOSTAT
DH Y2 G R C W1 W2 Y1 O INDOOR UNIT
ECOER AHU
E-heater or Dual fuel
To activate the indoor second heater.
Outdoor W terminal outputs 24Vac once the system needs it.
a. Work when the HP cannot to be started because of Ta < the value of n01
setting in heating.
b. Work when the second heater is called because n02 setting is ON (EAux) and
Ta < the value of n03 setting in heating.
c. Work when the HP is in defrosting.
C Y OW
OUTDOOR UNIT
Fig 10-2 Schematic diagram for control wiring connection
NOTES:
1. Be sure power supply agrees with equipment nameplate. 2. Power wiring and
grounding of equipment must comply with local codes. 3. Low voltage wiring to
be No. 18 AWG minimum conductor. 4. ” ” means the electric auxiliary heater
connection.
- Some thermostats may use W2/AUX for heat pump.
Manufacturer reserves the right to change specifications or designs without notice.
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11. Electrical High Voltage
11.1 High voltage power supply
ECOER INC.
WARNING
During installation, testing, servicing, and trouble shooting of this product,
it may be necessary to work with live electrical components. Failure to follow
all electrical safety precautions when exposed to live electrical components
could result in death or serious injury.
The high voltage power supply must agree with the equipment nameplate. Power wiring must comply with National, State and Local codes.
Follow instructions on unit wiring diagram located on the inside of the control box cover.
Fig 11-1 Read the Warning Label
Model 2436 4860
Power Supply Voltage 208/230V-1Ph-60Hz 208/230V-1Ph-60Hz
MCA 24.4A 32.5A
Breaker 35A 50A
11.2 High voltage disconnect switch
Install a separated disconnect switch at the condensing unit. Field provided
flexible electrical conduit must be used for high voltage wiring.
In order to get full warranty coverage on the compressor, it’s mandatory to
install a surge protector to prevent the unit from damaging caused by abnormal
electrical spikes.
We recommend the Installation of a GFIC (install the GFIC as per your local
codes).
11.3 High voltage ground
Ground the condensing unit according to National, State, and Local code
requirements.
Fig 11-2 Install an independent switch
Fig 11-3 Unit grounding Manufacturer reserves the right to change specifications or designs without notice.
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ECOER INC.
12. Start-up
Prior to start-up the unit, connect IoT device if equipped with. Refer to IoT
IM and Registration Guide via ESS Pro App. At the same time, ensure chapters 5
to 11 have been completed.
1. Set the thermostat to OFF.
2. Turn on disconnect switch to apply power to the indoor and outdoor units.
3. Wait an hour before starting the unit if the outdoor ambient temperature < 59 .
4. Set the thermostat to ON.
60 MIN
NOTE:
It may take up to 45 minutes in the first time for heating operation to exit
start-up control. This is normal function to preheat lubricants in the bottom
of compressor.
Manufacturer reserves the right to change specifications or designs without notice.
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ECOER INC.
13. System Charge Adjustment
13.1 Weigh-in method
Weigh-in method can be used for the initial installation, or anytime a system
charge needs to be replaced. Weigh-in method can also be used when power is
not available on the job site or the ambient temperature is improper to use
refrigerant coefficient and sub-cooling charge method.
When use weigh-in method in heating mode, be sure the compressor discharge
superheat (DSH) meets the target value. Basically, the liquid line sub-cooling
(SC) shall not exceed 30.
Use gauge port to charge the system in heating mode, query live data by BS3
button to calculate DSH (The difference between parameter “11” and “18”) or
check SC/DSH via ESS Pro App.
25~60
DSH
Table 13-1 Charge amount table
A Model 2436
4860
B Factory charge
The data on nameplate
Indoor
24K 36K 36K 48K 60K
C
Charge amount for ecoer air handler
0 0 0 18oz 1 18oz 1
D Charge multiplier for liquid
line length *2
0.6 oz/ft
1. Every condensing unit is factory charged for the smallest rated indoor
coil combinations. An additional amount of refrigerant adjustment is required
for a large indoor coil. It’s invalid for system with electric heat or other
third-party heat source whose capacity is 1.2 times of heat pump nominal
capacity.
2. The charging guideline is calculated in 25ft of standard size line set. A
refrigerant adjustment may be necessary if the line set length is over the
pre-charged 25 ft (adding 0.6 oz/ft on 3/8 liquid line respectively).
Charging calculation:
1. The air handler charging =
oz(A)
2. The liquid line length =
ft(B) * If less than 25ft, it is defined as 25ft.
3. Standard line length =
25
ft(C)
4. Charge multiplier for 3/8 line = 0.6 oz/ft(D)
5. The charging for Line((B-C) × D)=
oz(E)
6. The total charging(A+E) =
oz(F)
Note: You can also use the refrigerant calculator in ESS Pro.
Manufacturer reserves the right to change specifications or designs without
notice.
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13.2 Auto charge mode
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ECOER INC.
NOTES:
1. This AUTO charge mode is suitable for ambient temperature between 50 and
115. But for the best results, indoor temperature should be kept between 70
and 80. For outdoor ambient temperature is below 50, use weigh-in charge
method only.
115
50
80
70
a) Outdoor ambient
b) Indoor ambient
Fig 13-2 Temperature limit for AUTO charge mode
2. Start-up control is enforced to complete prior to activate the AUTO charge mode. It may take 4 to 10
minutes to exit start-up control procedure and fix the compressor speed (RPS).
3. The service valve is usually closed except in charge mode. If you need to know the suction pressure, you can log in to ESS Pro, or read the parameter of “07” from Spot check.
Enter the charge mode
Turn on the power supply for the system, select cooling mode at thermostat.
Make sure the setting temperature is lower than indoor temperature for at
least 5 to finish this charge mode NOTE1.
Press and hold BS4 button for five (5) seconds until SEG1 displays blinking 7.
After one minute, the system will go into AUTO charge mode NOTE2.
1 minute
Off Blinking On
SEG1 SEG2 SEG3
1second
Fig 13-1 LED display in AUTO charge mode
Run the system for 15~20 minutes and check refrigerant coefficient number
(here short for “X”, 0 < X < 1) from the LED display. If X 0.6, remove
refrigerant; or X < 0.4, add more refrigerant. Then wait for 5 minutes to
allow system pressure balanced. Check the new coefficient number to make sure
you get 0.50.6. Basically, 0.4 to 0.6 is acceptable if 7 SSH 20. When the LED
displays “–” for more than 20 minutes, stop charging and adjust the TXV
opening to ensure required compressor suction superheat (Refer to the
following page).
Manufacturer reserves the right to change specifications or designs without notice.
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ECOER INC.
Refrigerant coefficient
The refrigerant coefficient is used to evaluate the refrigerant level in the ecoer system.
Undercharged
Proper
Overcharged
0
0.4 0.5 0.6 0.7
1.0
Use either way below to end AUTO charge mode Press BS4 once/ After 2 hours running (Automatically EXIT)/ Turn off the system at thermostat
Fully automatic refrigerant charging:
Refrigerant charging if the unit is undercharged:
1. Connect the refrigerant tank to the service gauge port of the unit and
open all the service valves. 2. Power on the system and set the thermostat to
the cooling mode. 3. Press and hold the BS4 button for 5 seconds until the
display starts blinking “7.”. 4. Wait for at least 1 hour, and the system will
automatically charge the refrigerant to the appropriate
level. 5. Remove the refrigerant tank.
BS1 BS2 BS3 BS4
B
A
Note: 1. Prior to opening the service valves, ensure to purge all the hoses.
2. Make sure to place the refrigerant tank upside down before connecting it.
3. Only one hose (Connection A) is needed for the refrigerant charge. If you
want traditional connection,
you can also use a pressure gauge (Connection B).
Manufacturer reserves the right to change specifications or designs without notice.
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ECOER INC.
TIPS How to adjust indoor TXV opening
To keep the best performance and reliability of Ecoer Smart Inverter system, be sure liquid line subcooling (SC) and compressor suction superheat (SSH) meet the requirements.
6~18
SC
Target SC and SSH in cooling
7~20
SSH
· If the LED displays “–” in AUTO charge mode for more than 20 minutes, stop
charging and use a wrench to clockwise the TXV to ensure SSH is no less than
7.
· In case that the cooling performance is abnormal due to improper superheat
(i.e. SSH >20). Proceed as followings to complete the field adjustment.
1. Activate AUTO charge mode from outdoor condensing unit to fix compressor
speed (RPS) by press BS4 for 5 seconds on MCB. Run the system for 15~20
minutes to check refrigerant coefficient number from LED display or ESS Pro
App, add refrigerant until you get 0.5.
2. Open the front panel of the indoor unit, then use a wrench to
counterclockwise the TXV until SSH 20. This will make more refrigerant flow
into indoor coil for better cooling performance.
NOTE: Maintain a minimum of 15 minutes operation after every refrigerant
amount or TXV opening adjustment (the TXV adjustment should be done at ¼ turn
each time), then check live SC and SSH on ESS Pro App.
Counterclockwise
Clockwise
Remember: Put back the panel after TXV adjusted.
Fig 13-3 Adjust indoor TXV opening according to SC and SSH Manufacturer
reserves the right to change specifications or designs without notice.
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ECOER INC.
13.3 Sub-cooling charge
Refer to the following steps to charge refrigerant by sub-cooling degree in
cooling mode.
STEP1 CALCULATE SUPERHEAT ON SUCTION VALVE
Measured suction line temperature = Measured suction line pressure
= PSIG Calculated superheat value = ___
Table 13-2 Superheat calculation on gas service valve
Suction line TEMP ()
8
Final Superheat () 10 12 14 16 18 20 22 Suction Gauge Pressure (PSIG)
40
101 97 93 89 86 82 78 75
42
105 101 97 93 89 86 82 78
44
110 105 101 97 93 89 86 82
46
114 110 105 101 97 93 89 86
48
118 114 110 105 101 97 93 89
50
123 118 114 110 105 101 97 93
52
128 123 118 114 110 105 101 97
54
133 128 123 118 114 110 105 101
56
138 133 128 123 118 114 110 105
58
143 138 133 128 123 118 114 110
60
148 143 138 133 128 123 118 114
62
153 148 143 138 133 128 123 118
64
159 153 148 143 138 133 128 123
66
164 159 153 148 143 138 133 128
68
170 164 159 153 148 143 138 133
70
176 170 164 159 153 148 143 138
72
182 176 170 164 159 153 148 143
STEP2 CALCULATE SUB-COOLING ON LIQUID VALVE
Measured liquid line temperature = ____ Measured liquid line pressure
= ____PSIG Calculated sub-cooling value = ____
Add refrigerant if calculated sub-cooling value is lower than the designed
one. Repeat the steps above.
Table 13-3 Sub-cooling calculation on liquid service valve
Liquid line TEMP ()
55 60 65 70 75 80 85 90 95 100 105 110 115 120 125
Final Sub-cooling () 6 7 8 9 10 11 12 13
Liquid Gauge Pressure (PSIG) 173 176 179 182 185 188 191 195 188 191 195 198
201 204 208 211 204 208 211 215 218 221 225 229 221 225 229 232 236 239 243
247 239 243 247 251 255 259 262 266 259 262 266 270 275 279 283 287 279 283
287 291 295 300 304 309 300 304 309 313 318 322 327 331 322 327 331 336 341
346 351 355 346 351 355 360 365 370 376 381 370 376 381 386 391 397 402 407
397 402 407 413 418 424 430 435 424 430 435 441 447 453 459 465 453 459 465
471 477 483 489 496 483 489 496 502 508 515 521 528
Fig 13-4 Measure the superheat or sub-cooling
Table 13-4 Designed sub-cooling degree
Model Designed sub-cooling degree (SC)
24
8 (±2)
36
10 (±2)
48
10 (±2)
60
10 (±2)
Manufacturer reserves the right to change specifications or designs without notice.
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STEP3 ADJUST REFRIGERANT LEVEL TO ATTAIN PROPER GAUGE PRESSURE
Add refrigerant if the sub-cooling is lower than the chart value.
ECOER INC.
1. Connect gauge hoses to refrigerant tank and liquid/gas service valves (Use
gauge port instead of gas service valve for charge in heating. Note: The gauge
port is normally closed, please enter the auto charge mode for addcharging).
2. Purge all hoses. 3. Stand the refrigerant tank upside-down and charge. 4.
Stop adding refrigerant when sub-cooling matches the charging chart.
Remove refrigerant if the sub-cooling is higher than the chart value.
STEP4 STABILIZE THE SYSTEM
1. Wait five (5) minutes for the unit to stabilize between adjustments. When
the sub-cooling matches the chart, the system is properly charged.
2. Remove gauge hoses. 3. Replace and tighten service port caps to prevent
leaks. Plus an additional 1/6 turn may be required.
STEP5 RECORD SYSTEM INFORMATION FOR FURTHER REFERENCE
Condensing unit model Indoor unit model Measured outdoor ambient temperature
Measured indoor ambient temperature Liquid gauge pressure Suction gauge
pressure Measured suction line temperature Measured liquid line temperature
Manufacturer reserves the right to change specifications or designs without
notice.
PSIG PSIG
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14. System Operation
14.1 Default display
LED on main control board can display the operating status of outdoor unit (ODU).
SEG1 SEG2 SEG3
7 segment display
ECOER INC.
SEG1: Normally blank, but it displays codes “0 to 9” accordingly if there is damaged sensor and command response.
SEG1 Code 0 1 2 3 4 5 6 7 8 9
Description Software is updating through IoT device High pressure sensor (HP) fault backup running Low pressure sensor (LP) fault backup running Compressor discharge temperature sensor (TD) fault backup running IPM module temperature sensor (TF) fault backup running Ambient temperature sensor (TA) fault backup running Defrost sensor (TH) fault backup running Compressor suction temperature sensor (TS) fault backup running Liquid line temperature sensor (TL) fault backup running IoT command response
SEG2: Normally blank, but it will display code accordingly as below if outdoor unit is running under limited condition.
SEG2 Code 0 1 2 3 4
Description Running under high pressure limit Running under low pressure limit Running under discharge temperature limit Running under IPM module temperature limit Running under compressor current limit
SEG3: It displays outdoor unit’s operation mode.
SEG3 Code
0
Description
Stop (Y signal de-energized)
1
Ready to start-up *NOTE
2
Cooling
3
Heating
4
Oil return
5
Defrost
6
Manual defrost
7
AUTO charge mode in cooling
8
Pump down
NOTE: Compressor waits three to eight (8) minutes to restart.
Manufacturer reserves the right to change specifications or designs without notice.
Feb. 2024
Ecoer TDi Pro ODU IM
Mode list (SEG3 Display)
Stop or standby
Ready to start-up
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Cooling Heating Oil return Defrost Manual defrost
AUTO charge mode in cooling
Pump down
Manufacturer reserves the right to change specifications or designs without
notice.
ECOER INC. SEG1 SEG2 SEG3
SEG1 SEG2 SEG3 SEG1 SEG2 SEG3 SEG1 SEG2 SEG3 SEG1 SEG2 SEG3 SEG1 SEG2 SEG3
SEG1 SEG2 SEG3 SEG1 SEG2 SEG3 SEG1 SEG2 SEG3
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ECOER INC.
14.2 Field setting
Outdoor condensing units’ functions can be applied by dipping switch and
pressing buttons.
14.2.1 Setting by dip switches
SW1
SW1 Dip switch NO Setting item
Description
Status
Content
ON DIP
1
Snow Sensor Control
ON OFF (factory)
Disable Enable
12 3 4
2
Capacity selection
ON OFF (factory)
2 or 4 Ton 3 or 5 Ton
3
AC only / Heat pump
ON OFF (factory)
AC only Heat pump
ON
Disable
4
Command *a response for IoT
OFF (factory) Enable
Use minor straight screwdriver to dip switch. Must power off the unit for at least two minutes to activate the change.
a. Remote field setting, troubleshooting, software programming etc.
14.2.2 Setting by pressing buttons
Query and setting operation can be done by pressing buttons 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 BS1 for 5 seconds to set special functions.
Setting mode
Symbol selection by pressing BS2 button
Press BS3
Spot check
Press BS3 once
Default mode
Setting item selection by pressing BS2 button
Press BS3
Contents display Press BS3
Exit Press BS1 once
Manufacturer reserves the right to change specifications or designs without notice.
Press BS1 once
Query settings Symbol selection by pressing BS2 button
Press BS3
Contents display Press BS3
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Ecoer TDi Pro ODU IM
Default mode (Spot check)
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ECOER INC.
System states can be showed on the 7 segments display (LED) of outdoor unit. Press BS3 button to get the
code number and corresponding information with an interval of one second.
Example: Code number
Detailed information
SEG1 SEG2 SEG3
SEG1 SEG2 SEG3
No. Number content
Example Description
Default Refer to default display instructions 902
01-
Outdoor unit type and capacity
H3
02-
Liquid line sub-cooling
10
03-
Compressor suction superheat
18
04-
Compressor speed
56
05-
Electronic expansion valve opening
360
06-
Step of fan
8
07-
Low pressure (LP sensor)
145
08-
High pressure (HP sensor)
350
09-
Outdoor ambient temp. (TA)
95
10-
Compressor suction temp. (TS)
70
11-
Compressor discharge temp. (TD)
170
12-
Defrost sensor temp. (TH)
80
13-
Liquid line temp. (TL)
70
14-
Inverter module temp. (TF)
150
15-
Target evaporating temp. (Tes)
43
16-
Current evaporating temp. (Te)
45
17-
Target condensing temp. (Tcs)
104
18-
Current condensing temp. (Tc)
112
19-
Compressor DC current
10.1
20-
Undercharged refrigerant signal
1
21-
Main software version
610
22-
Inverter software version
38
23-
Current fault
E1
24-
The last fault
F1
25-
Fault before the last fault
F2
26-
Product series
3
9: Command/Troubleshooting 0: Running under high pressure limit 2: Cooling
mode H: Heat pump C: AC only 3: 3Ton 10 18
56RPS
360pls
The 8th step
145psig
350psig 95 70 170 80 70 150 43 45 104 112
10.1A
0: None 1: Level 1 2: Level 2
Ver 610
Ver 38 Display up to 5 * codes
–: none
–: none 3Pro series
Remarks: When multi-error codes exist at the same time, each code will be displayed one by one with an interval of one (1) second.
Manufacturer reserves the right to change specifications or designs without notice.
Feb. 2024
Ecoer TDi Pro ODU IM
Setting mode
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ECOER INC.
Press and hold BS1 button for five (5) seconds to enter the parameter setting interface. The latest setting will be taken as the final one.
Symbol Function n00 Mode choice
Forced heat pump stop when ambient
n01
temperature is lower than specified value. Switching to heat by gas furnace
or boiler in cold winter.
n02
Indoor second heater for outdoor unit outputs 24VAC at W terminal (CN5).
Outdoor unit outputs 24VAC at W terminal (CN5) when ambient n03 temperature is lower than specified value to start indoor electric auxiliary heater.
n04 Defrost mode setting *3
n05 Silent mode setting
n06 Night silent setting- start time
n07 Night silent setting- end time
n08 Forced defrost n18 Product Series setting
Item 0 (factory) 1 2 0 1 (factory) 2 3 4 0 (factory) 1 0 (factory) 1 2 3 4 0 1 (factory) 2 0 (factory) 1 2 3 4 0 1 (factory) 2 3 4 0 1 (factory) 2 3 4 0 (factory) 1 3
Description Normal (Energy Saving) mode Dry mode 1 High capacity mode 2 Stop heat pump when TA<-22 Stop heat pump when TA<-3 Stop heat pump when TA<15 Stop heat pump when TA<30 Stop heat pump when TA<40 ON (Electric auxiliary heater) OFF (Furnace or Boiler) TA<15 (24VAC output) TA<30 (24VAC output) TA<40 (24VAC output) TA<-3 (24VAC output) OFF Defrost in heavy snow area Standard mode Defrost in light snow area None silent mode Silent mode (level 1) Super silent mode (level 2) Night silent mode (level 1) Night super silent mode (level 2) 17:00 18:00 19:00 20:00 21:00 5:00 6:00 7:00 8:00 9:00 OFF ON *4 Pro series
Remarks: 1. The evaporating temperature of indoor coil can drop down to 28. 2.
The evaporating temperature of indoor coil can drop down to 28 in cooling
mode, and the condensing
temperature can go up to 122 in heating mode. 3. Reduce about 10% heating time
for heavy snow area, increase about 10% heating time for light snow area.
4. System enters defrost after the heating start-up and an extra five
minutes.
Manufacturer reserves the right to change specifications or designs without notice.
Feb. 2024
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14.3 Major components function
Liquid Service Valve TL
EEV
ECOER INC.
TA FAN
TH Heat Exchanger
Gas Service Valve Gauge Port SV1
LP ACC
HP HPS
RV (ST1)
OilS TS
TD INV
Name Inverter compressor Oil separator Outdoor fan Electronic expansion valve
Reversing valve Solenoid valve 1
Temperature sensor
High pressure sensor Low pressure sensor Accumulator
Symbol Function
INV
Adjusts refrigerant flow rate by changing the speed (RPS) based on objective pressure.
OilS The compressor oil is collected and returned to the compressor.
FAN
Outputs heat exchanger capacity by adjusting the motor rotation speed based on operating pressure.
EEV
- Fully open in cooling mode and defrost operation. 2) Control compressor discharge superheat in heating mode.
RV Switches the operation mode between heating and cooling (including
(ST1) defrost control).
SV1 (Normally close) Control charging on and off when in charging mode.
TH Uses to control defrost 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 (SSH).
TL Uses to detect liquid line temperature and calculate sub-cooling (SC).
TD
Uses to detect compressor discharge temperature and calculate discharge superheat (DSH).
TF Uses to detect heat sink temperature of inverter module.
HP Uses to detect high pressure. LP Uses to detect low pressure. ACC Uses to store excess refrigerant.
Manufacturer reserves the right to change specifications or designs without notice.
Feb. 2024
Ecoer TDi Pro ODU IM
14.4 Control logic description
14.4.1 Operation mode
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SW1_3=OFF (factory), Ecoer system uses Y/O/C signal to operate heat pump function. SW1_3=ON has been set, Ecoer system uses Y/C signal to run cooling only.
ECOER INC.
SW1 ON DIP
Normal operation: Compressor control / EEV control / Fan motor control / Protection control More detailed information can be found on Ecoer TDi Pro service manual.
1 2 3 4
14.4.2 Compressor control
SW1_3
Standby
Start-up control
Pressure differential control MAX time (cooling) 10 minutes MAX time (heating)
15 minutes
PI Control
Depending on the load of the space.
Outdoor Capacity Cooling/Heating Min RPS Cooling Max RPS Heating Max RPS
2 Ton 18 70 90
3 Ton 18 86 106
4 Ton 18 66 86
5 Ton 18 76 92
14.4.3 Outdoor electronic expansion valve (EEV) control
Standby
Cooling: 360pls480pls Heating: 360pls0pls
Start-up control
Cooling: 480pls Heating: Temperature differential control
PI Control
Cooling: 480pls Heating: Depending on the compressor discharge superheat
(DSH). *NOTE
NOTE: Heating DSH should be between 25 and 60 with proper refrigerant level.
· Overcharged: DSH is less than 18 with EEV opening < 72pls. · Undercharged:
DSH is higher than 60 with EEV opening 460pls
Manufacturer reserves the right to change specifications or designs without notice.
Feb. 2024
Ecoer TDi Pro ODU IM
14.4.4 Defrost control
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ECOER INC.
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) TA is between 41 and 59: TH 30, Delta T = 18 b) TA is between 19 and 41 :
TH 30, Delta T = 12~18 c) TA is less than 19 : TH < 9, accumulative compressor
run time 80 minutes
TH back-up running: TA < 59 and LP 90PSIG, accumulative compressor run time 60
minutes
II. After “Minimum Run Time” (MRT) is achieved.
a) MRT is 3.5 hours if TA is less than 23 b) MRT is 2 hours if TA is between
23 and 43
III. The high pressure drops below 245PSIG for 20 minutes if TA is between 14
and 28.
EXIT
Defrost will be terminated once defrost temperature sensor (TH) reaches 64 for one (1) minute or the defrost time has exceeded eight (8) minutes.
SETTING
Defrost mode setting (n04) offers termination options for different
geographical conditions.
a) Defrost in heavy snow area will extend defrost for one (1) minute, but
reduce the heating time to execute more defrost cycles.
b) Defrost in light snow area will reduce defrost for 30 seconds.
14.4.5 Manual Defrost
Manual defrosting mode can be used when verifying defrosting or forcing
defrosting. Note: After 5-10 minutes of continuous heating operation, the unit
can respond to manual defrosting in time; otherwise, the unit will enter after
meeting the requirements.
Enter in either way:
a. n08 setting;
b. Hold on BS1+BS2 for more than 5 seconds, release and
BS1
BS2
BS3
wait about 1 minute.
BS4
Exit in either way: Defrost exit automatically/Heating demand off/Power off
Manufacturer reserves the right to change specifications or designs without notice.
Feb. 2024
Ecoer TDi Pro ODU IM
15. Troubleshooting
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ECOER INC.
If the system does not operate properly besides any malfunctions. Check the system based on the following procedures.
Symptoms
Possible causes
System does not · No 24 VAC for Y signal from
start-up but the
thermostat.
digital tube shows
normally
· Incompatible thermostat
System operates mode reversely
· Incorrect O/B signal selection
Solutions
· Be sure Y/O/C wirings are connected correctly and the cooling/heating
setting temperature at thermostat is proper
· Use other traditional 24VAC thermostats
· Choose O for cooling at thermostat
System cannot cool well
· Outside temperature is too high · Outside temperature is too low · Dirty air
filter or blocked duct
· Lack of refrigerant · Refrigerant has been blocked in
the condenser coil
· Normal protection control to limit RPS · Ensure the cooling loads · Replace
the air filter and eliminate any
obstacles.
· Check refrigerant amount or any leaks. · Counterclockwise the TXV (Make sure
the
refrigerant coefficient is 0.6)
System cannot heat well
· Outside temperature is too low · Install auxiliary heat for backup *Dual-
but no third-party heat inside
heating is recommended
· The outdoor coil is dirty or has · Clean the outdoor coil
been covered by heavy snow
· Dirty air filter
· Replace the air filter
· Micro channel coil has been used · No micro channel coils shall be used for
for heat pump
heat pump
· Lack of refrigerant
· Check refrigerant amount or any leaks
Remarks: Ecoer systems are compatible with most traditional 24VAC thermostats.
CAUTION
Reversing valve is energized (208/230VAC) in heating mode.
Manufacturer reserves the right to change specifications or designs without notice.
Feb. 2024
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ECOER INC.
Error codes List for Condensing Unit
Error codes can be inquired by BS3 button, and seen on Ecoer Smart Service Pro
App. Sign in App >Files >Service, refer to Ecoer TDi Pro service manual for
troubleshooting details.
Code P1 E1 P2 E2 P3 E3 P4 P5 E5 P6 E6 P7 E7 P8 E8 P9 PA F1 F2 F3 F4 F5 F6 F7
F8 E4 H0 H1 H2 H3 H4 H5 H6 HF
C0-CC E0
Description
High pressure protection System locks up when P1 has occurred six times in 3
hours. Low pressure protection in cooling mode System locks up when P2 has
occurred six times within 3 hours. Compressor discharge temperature (TD)
protection System locks up when P3 has occurred six times within 3 hours.
Compressor discharge temperature (TD) sensor error Inverter module temperature
(TF) protection System locks up when P5 has occurred six times within 3 hours.
Compressor over-current protection System locks up when P6 has occurred six
times within 3 hours. Liquid slugging protection System locks up when P7 has
occurred three times within 5 hours. Low compressor voltage protection System
locks up when P8 has occurred three times within an hour. Incorrect compressor
line sequence DC fan motor over-load protection Ambient temperature (TA)
sensor fault Compressor suction temperature (TS) sensor fault Liquid line
temperature (TL) sensor fault Defrost temperature (TH) sensor fault Compressor
discharge temperature (TD) sensor fault Inverter module temperature (TF)
sensor fault High pressure (HP) sensor fault Low pressure (LP) sensor fault
Communication fault between main chip and INV drive chip Heavy undercharge
limit operation Ambient temperature limit operation in cooling Ambient
temperature limit operation in heating Abnormal switch alarm for reversing
valve Defrost temperature (TH) sensor error EEPROM fault Low voltage alarm
Abnormal function control Compressor INV module protection System locks up
when C0~CA has occurred three times within an hour.
Legend
Cannot restart 1 Cannot restart 1 Cannot restart 1
Cannot restart 1 Cannot restart 1 Cannot restart 1 Cannot restart 1 Cannot
restart 1 Cannot restart 1 Backup running2 Backup running2 Backup
running2 Backup running2 Backup running2 Backup running2 Backup running2
Backup running2 Cannot restart 1
Alarm
Alarm
Cannot restart *1
Remarks:
1. Disconnect power supply switch for 5 minutes to reset, then turn on power
supply for the unit. 2. Unit goes to backup running under sensors fault varies
from 7 to 120 days. Allow up to two (2) sensors backup running at the same
time.
Manufacturer reserves the right to change specifications or designs without notice.
Feb. 2024
Ecoer TDi Pro ODU IM
16. Wiring Diagram
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ECOER INC.
2436 Model
Manufacturer reserves the right to change specifications or designs without notice.
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ECOER INC.
4860 Model
Manufacturer reserves the right to change specifications or designs without notice.
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ECOER INC.
Manufacturer reserves the right to change specifications or designs without notice.
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ECOER INC.
©2022 ECOER INC. 43671 Trade Center Place, Suite 100 Dulles, VA 20166
Tel: 703-348-2538
www.ecoer.com
Manufacturer reserves the right to change specifications or designs without notice.
Feb. 2024
References
Read User Manual Online (PDF format)
Read User Manual Online (PDF format) >>