EarthLinked Technologies Prime-025, Prime-060, Prime-030, Prime-036, Prime-040 Quick Start Instructions

Prime Series

PSD Geothermal Heating and Cooling System

Quick-Start Instructions

PSD-QS (02/16) ©2016 EarthLinked Technologies, Inc.

Table of Contents

List of Revisions ................................................................................................................................. 4

Model Nomenclature ....................................................................................................................... 5

Safety ................................................................................................................................................ 6

Equipment Manuals ......................................................................................................................... 6

Installation ........................................................................................................................................ 7

1) Component Matching ............................................................................................................... 7

2) Compressor Unit Placement .................................................................................................... 8

3) Refrigeration ............................................................................................................................ 9

4) System Applications and Electrical ......................................................................................... 13

5) SureStart ................................................................................................................................ 19

Features ................................ ................................................................................................ . 19

Operation ............................................................................................................................... 19

Flash Codes – Single Phase .................................................................................................. 21

Flash Codes – Three Phase ................................................................................................... 22

6) Internal Heat Recovery System .............................................................................................. 23

Earth Loop Protection System ....................................................................................................... 26

1) Anode Wire Installation .......................................................................................................... 26

2) EPS Operation and Service ................................................................................................... 31

3) Current Verification ................................................................................................................ 32

Start-Up Process ............................................................................................................................. 33

1) System Leak Check ............................................................................................................... 33

2) Evacuation ............................................................................................................................. 36

3) Initial Charge .......................................................................................................................... 38

4) Final Charge .......................................................................................................................... 40

Troubleshooting ............................................................................................................................. 45

1) Compressor ........................................................................................................................... 45

2) System ................................................................................................................................... 49

Commissioning Document ............................................................................................................ 52

Tools and Equipment ..................................................................................................................... 59

Triple Evacuation ............................................................................................................................ 60

PSD-QS (02/16) Page 2

List of Figures

Figure 1. Matching Component Model Numbers .................................................................................. 7

Figure 2. General Layout of System Components .............................................................................. 8

Figure 3. Compressor Unit Bracket Installation .................................................................................... 9

Figure 4. Compressor Unit Clearance .................................................................................................. 9

Figure 5. PSD Connections ............................................................................................................... 10

Figure 6. Line Set Sizes ..................................................................................................................... 12

Figure 7. PSD Electric Box Components & Electrical Data ................................................................ 14

Figure 8. PSD Compressor Unit Electrical Schematic, 230-1-60 ........................................................ 15

Figure 9. PSD Compressor Unit Electrical Schematic, 230-3-60 ........................................................ 16

Figure 10. PSD Air Heating/Cooling/Water Heating Application ......................................................... 17

Figure 11. PSD Air Heating/CoolingWater Heating Field Wiring Diagram .......................................... 18

Figure 11a. SureStart Mode of Operation .......................................................................................... 20

Figure 12. Standard Storage Water Heater – Service Connections .................................................. 23

Figure 13a. GSTE Storage Water Heater - Service Connections ...................................................... 24

Figure 13b. GSTE Storage Water Heater – Tank Top View .............................................................. 24

Figure 14. Compressor Cabinet Socket/Cap ..................................................................................... 26

Figure 15. Disassembled Plug Connector ......................................................................................... 27

Figure 16. Anode Wire Insertion ................................................................ ....................................... 28

Figure 17. Install the Plug Insert ................................................................................................ ....... 29

Figure 18. Engage the Gland Nut ..................................................................................................... 29

Figure 19. Secure the Anode Wire. ................................................................................................... 30

Figure 20. The Plug and Socket Joint ............................................................................................... 30

Figure 21. Electric Box with EPS Components ................................................................................. 31

Figure 22. EPS Current Ratings ....................................................................................................... 32

Figure 23. Test for DC Current ......................................................................................................... 32

Figure 24. PSD Internal Flow Schematic .......................................................................................... 34

Figure 25. PSD Piping ....................................................................................................................... 35

Figure 26. Evacuation of PSD System ............................................................................................... 37

Figure 27. Initial Charge of PSD System............................................................................................ 39

Figure 28. Final Charge of PSD System ........................................................................................... 41

Figure 29. Charging to the Middle Sight Glass .................................................................................. 42

Figure 30. Charging to the Top Sight Glass ...................................................................................... 42

Figure 31. Pressure-Temperature for R-410A .................................................................................... 43

Figure 32. Start-Up Process .............................................................................................................. 44

Figure 33. Compressor Unit Voltage Information .............................................................................. 46

PSD-QS (02/16) Page 3

Figure 34. Compressor Motor Circuit Testing.................................................................................... 47

Figure 35. Compressor Motor Grounded Winding Test ..................................................................... 48

Figure 36. System Troubleshooting Chart ......................................................................................... 49

List of Revisions

Revised electrical drawings
Revised charging method due to elimination of TXV
Removed the requirement to add 1,000 BTUH to the Heating Load for each

occupant if domestic water heating by Heat Recovery Module (HRM) is part
of the system. See Technical Bulletin TEC-021616

Units now feature a nano Programmable Logic Controller (PLC) which allows

the following features:

 True two-speed system
 Automatically controls Heating and Cooling staging both of the

Geothermal system and the Auxiliary Heat

 Comes with Dual fuel mode capability - Gas or Electric
 Thermostat-agnostic: works with most thermostats on the market.

Minimum requirement: single stage Heat/Cool thermostat

 Eliminates the need for external balance point control or for an

outdoor sensor

 Zoning-friendly for air applications (relies on a damper zone)

PSD-QS (02/16) Page 4

Model Nomenclature

PSD

- 050

- 1

C

PRIME SERIES

HEAT/COOL

NOMINAL CAPACITY

COMPRESSOR,

VOLTS-PHASE-HZ

REFRIGERANT

025 = 25,000 BTUH = 2.0 TONS
030 = 30,000 BTUH = 2.5 TONS
036 = 36,000 BTUH = 3.0 TONS
040 = 40,000 BTUH = 3.3 TONS
050 = 50,000 BTUH = 4.2 TONS
060 = 60,000 BTUH = 5.0 TONS

1 = 230-1-60
1 = 230-3-60

C = R-410A

Disclaimer

Proper installation and servicing of the EarthLinked® Heat Pump is essential to its reliable
performance. All EarthLinked® systems must be installed and serviced by a technician authorized by
Earthlinked Technologies. Installation and service must be made in accordance with the instructions
set forth in this manual. Failure to provide installation and service by an ETI authorized installer in a
manner consistent with this manual will void and nullify the limited warranty coverage for the system.

Earthlinked Technologies shall not be liable for any defect, unsatisfactory performance, damage or
loss, whether direct or consequential, relative to the design, manufacture, construction, application or
installation of the field specified components.

phone: [phone] | toll-free: 866-211-6102

General Info: [e-mail]

PSD-QS (02/16) Page 5

Earthlinked Technologies, Inc.

4151 S. Pipkin Road

Lakeland, Florida 33811 USA

www.earthlinked.com

CSI # 23 80 00

Safety

IMPORTANT!

serious injury or death, or equipment or property damage.

if not avoided, may result in injury, or equipment or property damage.

IMPORTANT!

initiating the Start-Up procedure.

Warning, Caution and Important notices appear throughout the manual. Read these items carefully
before attempting installation, servicing or troubleshooting the equipment.

Notification of installation, operation or maintenance information which
is important, but which is not hazardous.

WARNING!

Indicates a hazardous situation, which if not avoided will result in

CAUTION!

Indicates a potentially hazardous situation or an unsafe practice, which

Equipment Manuals

The following is a listing of the equipment installation manuals that are provided with each component
specified for this EarthLinked® system.

Read and follow all installation instructions in these manuals,
appropriate for the EarthLinked® system being installed, BEFORE

Series AVS and AVV Air Handler
Series CCS Cased Coil
Series HCM Hybrid Cooling Module
Series GSTE Storage Water Heater
Earth Loop Specification and Installation Manual
Earth Loop Protection Kit Installation Manual

PSD-QS (02/16) Page 6

Installation

Prime

Compress.

Unit1

Air Handler

Cased Coil

Hybrid Cooling

Module

Earth Loop2

ETI

Model

Arcoaire

Model

ETI

Model

Arcoaire

Model

-025

AVS-0025-C*

FEM4P3600AL

CCS-0025-C*

EAM4X36L21A

HCM-1836C

-024-C

-030

AVS-0030-C*

FEM4P4200AL

CCS-0030-C*

EAM4X42L24A

-030-C

-036

AVS-0036-C*

FEM4P4800AL

CCS-0036-C*

EAM4X48L24A

-036-C

-040

AVS-0040-C*

FEM4P4800AL

CCS-0040-C*

EAM4X48L24A

-042-C

-050

AVS-0050-C*

FEM4X6000BL

CCS-0050-C*

EAM4X60L24A

HCM-4272C

-048-C

-060

AVS-0060-C*

FEM4X6000BL

CCS-0060-C*

EAM4X60L24A

-060-C

1. Contained in each compressor package:

 compressor unit
 four L-shaped hold down brackets
 product literature

2. All series Earth Loops

Warning!

AND/OR PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.

1) Component Matching

Upon receipt of the equipment, carefully check the component model numbers by referencing
Figure 1, to ensure that all components of the system match.

Figure 1. Matching Component Model Numbers

WEAR ADEQUATE PROTECTIVE CLOTHING AND PRACTICE ALL
APPLICABLE SAFETEY PRECAUTIONS WHILE INSTALLING THIS

EQUIPMENT. FAILURE TO DO SO MAY RESULT IN EQUIPMENT

Guidelines for the general layout of the system components are shown in Figure 2. Before placing the
compressor unit (outside or indoors), review the guidelines in Figure 2.

PSD-QS (02/16) Page 7

Figure 2. General Layout of System Components

2) Compressor Unit Placement

 EarthLinked® compressor units may be located inside or outside. If outside, place

compressor unit on a standard HVAC outdoor unit pad. If inside, place it on a level, hard
surface. If the compressor unit is to be fastened down, see Figure 3 for bracket
installation.

 Avoid placing the compressor unit in or near the living area of the residence.
 Attic installations must include a condensate pan with drain, and suspension from rafters

with suspension isolators.

 Clearance around the unit for service is illustrated in Figure 4. However, local codes and

applicable regulations take precedence.

 PSD Compressor Unit must be placed in an environment in which the surrounding air

temperature does not drop below 40°F.

 If the compressor unit or other refrigerant-containing system components are located

indoors, they shall be in a location which (1) is an unoccupied space, or (2) is served by
the circulating air system, or (3) provides 280 cu. ft. of open space per nominal ton of rated
system capacity. The 2012 International Mechanical Code defines residential occupancy
as including permanent provisions for living, sleeping, eating, cooking, and sanitation.
Consult local code authorities to define unoccupied space for the specific installation.

PSD-QS (02/16) Page 8

Figure 3. Compressor Unit Bracket Installation

IMPORTANT!

when required by the performance tables.

Figure 4. Compressor Unit Clearance

Placement instructions for other pieces of equipment that make up the EarthLinked® System are
included with those pieces of equipment and are listed in this manual under Equipment Manuals.

3) Refrigeration

After the EarthLinked® compressor unit and other system components are placed, the refrigeration
system tubing is run from the compressor unit to the other components, as appropriate. Figure 5
illustrates the refrigeration and electrical connection points for the compressor unit.

EarthLinked® compressor units that provide space cooling shall be
equipped with an EarthLinked® Hybrid Cooling Module (HCM) when:

(1) Required by the performance tables OR where BOTH of the

following circumstances occur:

(2) Ambient outdoor temperatures have exceeded the outdoor summer

design temperature conditions for a continuous system run time of
at least 7 hours, coupled with the conditions described in (3).

(3) Low thermal conductivity soils that do not effectively absorb and

dissipate heat. Examples of such soils are light dry soil or dry
sand, peat and organic soils dry clay soils and hardpan.

ALSO
EarthLinked® compressor units that provide space heating shall be

equipped with a Heating Performance Enhancement (HPE) control

PSD-QS (02/16) Page 9

PORT

FUNCTION

TYPE OF

CONNECTION

SIZE, INCHES

-025

-030

-036

-040

-050

-060

A

Electrical, Power

1-1/4” Hole

1 1 1 1 1

1

B

Electrical, Control

7/8” Hole

3/4

3/4

3/4

3/4

3/4

3/4

1

AH/CC/HWM Liquid

Braze

1/2

1/2

1/2

1/2

1/2

1/2

3

EL Liquid*

Braze

3/8

3/8

1/2

1/2

1/2

1/2

4

Anode Socket

---

---

---

---

---

---

---

5

EL Vapor*

Braze

5/8

3/4

3/4

3/4

7/8

7/8

6

AH/CC/HWM Vapor

Braze

3/4

3/4

3/4

7/8

7/8

7/8

7

DWT Supply

Braze

1/2

1/2

1/2

1/2

1/2

1/2

8

DWT Return

Braze

1/2

1/2

1/2

1/2

1/2

1/2

9

Electrical, control

---

---

---

---

---

---

---

10

Electrical, control

---

---

---

---

---

---

---

N = Nameplate and other information
*Line set sizes with provided compressor unit adapters

LEGEND

AH – Air Handler
CC – Cased Coil
EL – Earth Loop
HWM – Hydronic Water Module
HWT – Hydronic Water Tank
DWT – Domestic Water Tank

PSD-QS (02/16) Page 10

Figure 5. PSD Connections

Compressor units are shipped from the factory with a low pressure nitrogen holding charge. Carefully

Caution!

refrigerant connections (tube cutting, deburring, cleaning, brazing, etc).

adversely affect system performance and cause system failure.

Caution!

possible system failure.

relieve the holding charge when the compressor unit is being prepared to connect refrigerant system
piping.

This compressor unit is equipped with Copeland Ultra 32-3MAF Polyol
Ester Oil (POE). This is the only brand and type of oil that is

recommended for use with ETI compressor units.
POE oil absorbs significant amounts of moisture from the air very

rapidly. Exposure of the POE oil to air must be minimized. Even a few
minutes of exposure to air can be harmful to the system.

After the initial nitrogen holding charge has been released from the
compressor unit, it is critical that air not be allowed to enter the

compressor unit during the process of preparing compressor unit

To ensure air does not enter the compressor unit while preparing

refrigerant connections, “trickle” dry nitrogen through the compressor

unit, entering at the access port nearest the Active Charge Control
(ACC), to keep airborne moisture out of the compressor unit and the
POE oil.

Complete preparing and brazing all compressor unit refrigerant
connections at one setting to minimize exposure of open connections
to air. Failure to implement the above precautions will result in an
extended period of time to effectively evacuate the system, and may

REFRIGERANT PIPING CONNECTIONS
Refrigerant joints are to be brazed with 15% silver content brazing

alloy, utilizing the NITROGEN BRAZING PROCESS.
NITROGEN BRAZING PROCESS

PURPOSE:
Utilize the NITROGEN BRAZING PROCESS on all brazed refrigerant
piping connections. This process eliminates oxidation products from
inside joint surfaces.

TECHNIQUE:

“Trickle” nitrogen gas at 1-2 psi pressure through the joint area being
brazed, to displace the oxygen. When oxygen has been displaced,
turn off the nitrogen, and relieve the pressure at the joint to
atmospheric prior to brazing.

CONSEQUENCES:
Failure to displace oxygen with nitrogen at the brazed joint will result
in particulate matter being released into the system. The result is
discoloration of refrigerant oil, contamination of the system and

PSD-QS (02/16) Page 11

The compressor unit has factory installed service valves on the earth loop vapor and liquid stubouts,

LINE SET ADAPTERS REQUIRED FOR THE AIR HANDLER, CASED COIL, HYDROINIC
WATER MODULE AND DOMESTIC WATER MODULE ARE FIELD SUPPLIED. CHECK ALL
APPROPRIATE COMPRESSOR UNIT STUB-OUT TUBING SIZES FOR REQUIRED FIELD
SUPPLIED ADAPTERS!

EARTHLOOP, AIR HANDLER, CASED COIL LINE SETS

HWM LINE SETS

COMPRESSOR

UNIT SIZE

LINE SET O.D., INCHES

HWM

MODEL

LINE SET O.D., INCHES

LIQUID*

VAPOR*

LIQUID*

VAPOR*

2.0 Tons (-025)

3/8

5/8

-1836

3/8

1/2

2.5 Tons (-030)

3/8

3/4

-1836

3/8

1/2

3.0 Tons (-036)

1/2

3/4

-1836

3/8

1/2

3.3 Tons (-040)

1/2

3/4

-4248

1/2

5/8

4.2 Tons (-050)

1/2

7/8

-5472

1/2

5/8

5.0 Tons (-060)

1/2

7/8

-5472

1/2

3/4

*Liquid and Vapor lines must BOTH be insulated with Armaflex® or equivalent with at least 1/2” wall thickness for the full
length of the line set.

outside the compressor unit.
For the installation of system components requiring refrigeration connections, refer to Figure 6 for line

set sizes and the appropriate installation manual(s) following Figure 6.

Figure 6. Line Set Sizes

Series AVS Air Handler
Series CCS Cased Coil
SD Series Heating Option Kit, SDHO-1872
Series HCM Hybrid Cooling Module
Earth Loop Specification and Installation Manual

After installing and nitrogen brazing the HVAC system components and compressor unit service
valves, turn the Service Valves to Full Open and pressurize the refrigeration system to 150 psig with
dry nitrogen and a trace of refrigerant. Valve off the nitrogen Tank from the HVAC system
components and check joints with a sensitive Electronic Leak Detector to ensure they are sealed.
Repair any leaks and re-test as appropriate.

PSD-QS (02/16) Page 12

4) System Applications and Electrical

The PSD compressor unit electrical box major components and electric data for all compressor sizes
are shown in Figure 7.

The SureStart Module is a factory installed component that (1) reduces compressor starting current
and (2) reduces compressor starting torque, thus reducing stress on the compressor at start-up.

The Earth Loop Protection Control System, comprised of the EPS Power Supply, EPS Module and
EPS Fuse is in the contained within the electric box. This system is factory wired and ready to be
connected to the anode wire through an external electrical connection on the backside of the
compressor cabinet. The anode wire connection is detailed in a later section of this manual.

PSD Heating and Cooling System electrical and application illustrations are as follows.
Figure 8. PSD Compressor Unit Electrical Schematic, 230-1-60

Figure 9. PSD Compressor Unit Electrical Schematic, 230-3-60
Figure 10. PSD Air Heating/Cooling/Water Heating System Application
Figure 11. PSD Air Heating/Cooling/Water Heating System Field Wiring Diagram

PSD-QS (02/16) Page 13

Compressor

Unit Model

Compressor

Model

Voltage/Phase/

Hz

Voltage

LRA

RLA

MCA

MFS
Min.

Max.

-025-1C

ZPS26K5E-PFV

230-1-60

207

253

73.0

14.6

18.0

30

-025-2C

ZPS26K5E-TF5

230-3-60

207

253

58.0

9.6

12.0

20

-030-1C

ZPS30K5E-PFV

230-1-60

207

253

83.0

17.0

21.0

35

-030-2C

ZPS30K5E-TF5

230-3-60

207

253

73.0

12.9

16.0

25

-036-1C

ZPS35K5E-PFV

230-1-60

207

253

96.0

20.0

25.0

40

-036-2C

ZPS35K5E-TF5

230-3-60

207

253

88.0

15.8

19.0

30

-040-1C

ZPS40K5E-PFV

230-1-60

207

253

104.0

23.6

29.0

45

-040-2C

ZPS40K5E-TF5

230-3-60

207

253

83.1

15.6

19.2

30

-050-1C

ZPS51K5E-PFV

230-1-60

207

253

152.9

30.2

37.0

50

-050-2C

ZPS51K5E-TF5

230-3-60

207

253

110.0

18.4

23.0

35

-060-1C

ZPS60K5E-PFV

230-1-60

207

253

179.2

33.1

41.0

60

-060-2C

ZPS60K5E-TF5

230-3-60

207

253

136.0

19.6

24.0

35

LRA = Locked Rotor Amps
RLA = Rated Load Amps
MCA = Minimum Circuit Ampacity

MFS = Maximum Fuse or HACR Circuit Breaker Size
(External)

AWS = Consult NEC and Local Codes

Figure 7. PSD Electric Box Components & Electrical Data

PSD-QS (02/16) Page 14

Figure 8. PSD Compressor Unit Electrical Schematic, 230-1-60

PSD-QS (02/16) Page 15

Figure 9. PSD Compressor Unit Electrical Schematic, 230-3-60

PSD-QS (02/16) Page 16

Figure 10. PSD Air Heating/Cooling/Water Heating Application

PSD-QS (02/16) Page 17

Figure 11. PSD Air Heating/CoolingWater Heating Field Wiring Diagram

PSD-QS (02/16) Page 18

5) SureStart

Features

SureStart is a factory installed soft starter that reduces light flicker caused at start-up by scroll
compressor motors. This control has the following features:

 60 to 70% reduction in direct in-rush current
 Under voltage protection
 Motor reversal protection
 Self-adjusts for optimal start performance
 50/60 Hz compatible
 ETL, CE, EMC and RoHs compliant
 Tolerant to “dirty power” conditions
 Fault LED
 Internal current limiting

SureStart is factory wired for the appropriate power supply.

Operation

When the system control calls for compression operation, the compressor contactor will energize. If
the supply voltage is less than “minimum start-up voltage”, a 50 second delay is initiated. At the end
of the delay, another attempt will be made to start the compressor unless the supply voltage remains
unchanged. See Figure 11a for the SureStart Mode of Operation.

SureStart uses an optimated starting process that learns the starting characteristics of the
compressor to further refine the starting cycle on each recurring start.

If the compressor fails to start, the module will terminate the start attempt after 1 second and initiate a
3 minute lockout before attempting a restart.

While the compressor is running,, if supply voltage falls below the “shutdown on low voltage” limit for

2 seconds, SureStart will stop the compressor and initiate a 3 minute lockout. A restart will be initiated

after 3 minutes if the supply voltage is equal to or greater than the “minimum startup voltage”. This is

done to protect the compressor against a sudden drop in supply voltage.
SureStart is able to detect an interruption in power, when the interruption is 0.1 seconds or longer.

When a power interruption is detected, it will shut down the compressor for 3 minutes. A power
interruption that is shorter than 0.1 seconds may result in the compressor running backwards.

SureStart is able to determine if the compressor is running backwards. If this condition is detected,
the control will stop the compressor for 3 minutes before restart is initiated.

If the run capacitor if faulty or has failed, SureStart will shut down the compressor for 3 minutes before
initiating a restart.

PSD-QS (02/16) Page 19

Figure 11a. SureStart Mode of Operation

PSD-QS (02/16) Page 20

Flash Codes – Single Phase

LED Flash Codes

A Red LED indicator will flash under the following conditions. [NOTE: LED fault indicator is turned
off in normal running mode.]

a) Rapid Flash (10 / sec) : Low Voltage
b) Triple Flash Every Three Seconds (3 / 3 secs): Lockout on Three Failed Starts
c) Slow Flash (1 / 3 secs): Lockout on Over Current
d) Slow Steady Flash (1 / sec): Cycle Delay / Fault Mode

Flash Code (Rapid Flash (10 / sec) : Low Voltage)

- Displayed for “Low supply voltage” before or after a softstart.

- If Low voltage is detected before a start, a re-start is attempted after 50 seconds.

- If Low voltage is detected after a start, a re-start is attempted after 3 minutes.

Flash Code (Triple Flash every three seconds (3 / 3 secs): Lockout on Three Failed Starts)

- Displayed after failure to start on “Three consecutive start attempts”.

- Re-start is attempted after 50 minutes.

- Standard lockout period is revised to 3 minutes after a successful start.
In circumstances where the compressor may have seized or is unable to startup due to failure of

other components in the HVAC system, the software will check for three consecutive failed starts.
On the third sequential failed start, the program goes into Lockout for 50 mins. On failing to get a
good start even after 50 mins, it will re-attempt start again after duration of 50 mins. Once a good
start is eventually achieved, it will reset the hardstart counter and will require 3 failed starts again
to force it back into Lockout mode. Lockout can be cleared anytime through a power reset of the
SureStart device.

Flash Code (Slow Flash (1 / 3 secs): Lockout on Overcurrent)

- Displayed for “Overcurrent” in running mode of the compressor motor.

- Overcurrent limit is “25A for 08-16A version” and “50A for 16-32A rated version”.

- Also displayed, if internal Klixon of the compressor trips out on overheat.

- Re-start is attempted after 10 minutes.
To limit the current in compressors from extending abnormally beyond its stated capacities,

SureStart is also equipped with Overcurrent limit protection. For models rated from 16-32A,
SureStart is designed to trip out in overload conditions exceeding 50A. In smaller models, it is
designed to cutoff power to the compressor if the current drawn exceeds 25A. On overcurrent
lockout, SureStart attempts a re-start automatically after 10 minutes.

Both failed start lockout and overcurrent limit protection have been designed to prevent the
compressor from drawing abnormal currents in conditions not feasible for the compressor
operation.

Flash Code (Slow Steady Flash (1 / sec): Cycle Delay / Fault Mode)

- Displayed for “Cycle delay” between two consecutive softstarts or other faults mentioned
below.

- Re-start is attempted after a default period of 3 minutes.

- Other possible reasons for this Fault mode indicator can be due to

- incorrect wiring during installation,

- a failed Softstart attempt,

- intermittent power loss (duration longer than 100ms),

- frequency out of range, or

- failed run capacitor.

PSD-QS (02/16) Page 21

Flash Codes – Three Phase

A Red LED indicator will flash under the following conditions. [NOTE: LED fault indicator is turned
off in normal running mode.]

a) Reverse Phase: (1 / 2 secs)
b) Fault Mode/Cycle Delay: (1 / 4 secs)
c) Low Voltage/Over Voltage: 2 / 2 secs)

Flash Code (Reverse Phase: (1 / 2 secs))

- Displayed if the supply “Phase Sequence” gets reversed before or after a start.

- Re-start is attempted after 3 minutes.

Flash Code (Fault Mode / Cycle Delay: (1 / 4 secs))

- Displayed for “Cycle delay” between two consecutive softstarts or other faults mentioned
below.

- Re-start is attempted after a default period of 3 minutes.

- Other possible reasons for this Fault mode indicator can be due to

- a failed Softstart attempt,

- intermittent power loss (duration longer than 100ms),

- frequency out of range

Flash Code (Low Voltage / Over Voltage: (2 / 2 secs))

- Displayed for “Low supply voltage” or “High supply voltage” before or after a softstart.

- If voltage is out of range before a start, a re-start is attempted after 50 seconds.

- If voltage is out of range after a start, a re-start is attempted after 3 minutes.

PSD-QS (02/16) Page 22

6) Internal Heat Recovery System

The PSD compressor unit has a built-in heat recovery system which provides supplemental domestic
water heating at a significant operating cost savings. The heat recovery system operates throughout
the year to provide free hot water when operating in cooling mode and reduced cost hot water when
operating in the heating mode. The heat recovery system supplements hot water production, but
does not replace the standard storage water heater sized for the application.

The heat recovery system may be plumbed into an existing standard water heater as illustrated in
Figure 12.

Figure 12. Standard Storage Water Heater – Service Connections

Alternatively, the heat recovery system may be plumbed to the ETI Series GSTE storage water
heater as shown in Figures 13a and 13b. The Series GSTE storage water heaters are preferred

because the heat recovery system ports are designed to provide more efficient heat exchange within
the storage water heater.

PSD-QS (02/16) Page 23

Figure 13a. GSTE Storage Water Heater - Service Connections

Figure 13b. GSTE Storage Water Heater – Tank Top View

PSD-QS (02/16) Page 24

The PSD compressor unit internal heat recovery system contains a water high temperature control. It

ΔT

30

40

50

60

70

80

90

GPH

62

46

37

31

26

23

21

*ΔT in ºF; GPH in U.S. Gallons per hour.

WARNING!

is factory set to 140°F. The heat recovery system also contains a refrigerant low temperature which is
factory set to 130°F. Also, a freeze protection control is designed to operate the circulating pump
when water temperature drops to 40°F, in order to provide water circulation independent of
compressor operation.

The GSTE storage water heaters are available in 60, 80 and 119 US gallon capacities, all of which
have a 4.5 kW electric heating element, which provides the following recovery rates for increases in
water temperature.

The PSD compressor unit and associated water piping must be in an
environment maintained at a temperature of at least 40°F to avoid the
potential freeze-up problems which can cause equipment failure and
damage to the occupied structure.

PSD-QS (02/16) Page 25

Earth Loop Protection System

WARNING!

All power of the EarthLinked® System is to be shut OFF at the disconnect while

1) Anode Wire Installation

Prior to this, the below grade installation of the DIRECT AXXESS® Earth Loop System, including the
Earth Loop Protection System anode and anode wire has been completed per the Earth Loop
Protection Kit Manual, and at this point the anode wire is ready to be connected to the compressor
unit.

The earth loop protection system connection to the anode wire is on the back side of the compressor
cabinet as illustrated in Figure 14, showing the electrical socket with the sealing cap.

Figure 14. Compressor Cabinet Socket/Cap

The EPS-KIT contains the plug connector, which will be field assembled and connected to the
anode wire.

The steps to install the anode wire to the plug connector assembly are as follows.
Remove the sealing cap assembly tool from the compressor unit cabinet shown in Figures 14 and

15. Using the sealing cap assembly tool, as shown in Figure 15, unscrew the locking ring from the

plug connector assembly to access the plug insert. Then, remove the gland nut, gland cage,
and gland from the other end of the plug body as shown in Figure 15.

field wiring the Earth Loop Protection System. Failure to do so may result in
serious injury or death, or equipment or property damage.

PSD-QS (02/16) Page 26

Figure 15. Disassembled Plug Connector

PSD-QS (02/16) Page 27

Strip the insulation from the multi-strand anode wire back approximately ¾ inch from the end and,
while keeping the strands together, push the anode wire through the gland nut, gland cage, gland
and plug body as shown in Figure 16. Loosen one of the two screw terminals on the plug insert to
receive all of the strands of anode wire on one terminal.

Figure 16. Anode Wire Insertion

After inserting all strands of the anode wire into one of the terminals on the plug insert, tighten the
wire in place by tightening the screw on that terminal. Once tightened, push the plug insert back into
the plug body as shown in Figure 17 until it is firmly seated. Engage the locking ring with threads in
the plug body and turn clockwise with the sealing cap assembly tool until the lock ring is firmly
seated and tight against the plug insert.

PSD-QS (02/16) Page 28

Figure 17. Install the Plug Insert

Slide the gland forward on the anode wire until it is firmly seated in the plug body as shown in Figure

18. Next, slide the gland cage over the gland, and slide the gland nut firmly against the gland
cage, with the gland nut against the plug body. Engage the threads of the gland nut with those
inside the plug body and manually thread the gland nut clockwise by hand.

PSD-QS (02/16) Page 29

Figure 18. Engage the Gland Nut

Once the gland nut has been hand tightened into the plug body, use two adjustable wrenches to
further tighten the gland nut until it is snug in the plug body as shown in Figure 19 and the anode
wire is held firmly in the plug body and will not slip out. Do not over-tighten the gland nut!

Figure 19. Secure the Anode Wire.

After the plug and anode wire have been assembled, re-connect the sealing cap assembly tool to
the socket on the compressor unit cabinet. After aligning the electrical contact pins, manually
engage the threads on the plug locking cap with the threads on the socket and turn clockwise until
the plug is firmly hand-tightened to the socket as shown in Figure 20. If the anode wire rises away
from the compressor cabinet, be sure to shape a drip loop into the contour of the anode wire near
the plug and socket.

After the plug and socket joint is secured, the power may be turned ON at the disconnect.

PSD-QS (02/16) Page 30

Figure 20. The Plug and Socket Joint

2) EPS Operation and Service

IMPORTANT!

Reference Figure 21 for the EPS components in the compressor unit electric box.

Figure 21. Electric Box with EPS Components

With power ON, and viewing the EPS Module in the compressor unit electric box, the EPS green
light should be illuminated, indicating there is power to the EPS system.

If the yellow light is illuminated, there is an opening in the earth loop electrical circuit. The audible
signal will also be heard. After shutting power OFF, all electrical connections from the EPS module to
the earth loop system should be checked and adjusted as appropriate to ensure good electrical
contact.

If the red light is illuminated, there is a short in the earth loop electrical circuit. The audible signal
will be heard. Check and correct all wiring and connection as appropriate from the EPS module to the
earth loop to ensure they are not shorting.

If none of the lights are illuminated, check and replace, as appropriate, the fuse for the EPS Power
Supply as shown in Figure 21. For service purposes, a spare fuse has been factory supplied and is
located in the electrical box. The replacement fuse is Littlefuse 213 Series Slo-Blo® rated at 250
Volts, 2 Amperes, P/N 0213002MXP. This is also Allied Electronics Stock Number R1090710.

If it is necessary to operate the heating and cooling system while the EPS is down for service, the
EPS power may be temporarily disengaged to eliminate the audible alarm, by removing the EPS Fuse
shown in Figure 21. Upon completion of servicing the EPS, replace the fuse to energize the EPS
system and maintain warranty coverage.

DO NOT troubleshoot the EPS power supply or EPS module! If the above
steps do not resolve the problem, call ETI for technical service assistance at 1­863-701-0096.

PSD-QS (02/16) Page 31

3) Current Verification

Nominal System Capacity, Tons

Current Rating

1.5 thru 2.5

80 mA +/- 10%

3.0 thru 3.5

120 mA +/- 10%

4.0 thru 6.0

240 mA +/- 10%

WARNING!

measurement has been taken and before attempting to disengage the Ammeter

If it is necessary to verify the current flow through the EPS system, it can be checked with a digital DC
ammeter set on the Milliampere scale. The correct electrical currents for nominal system capacities
are listed in Figure 22.

Figure 22. EPS Current Ratings

Use extreme caution when checking current through the EPS system. Turn

OFF the main disconnect to the compressor unit when setting up the Ammeter
for the current measurement. Turn the power supply on only after the
Ammeter is in place for the measurement and hands and body are clear of all
electrical circuit conductors. Turn OFF the main disconnect after the current

and re-connect the EPS wiring. Failure to do this, could cause personal injury
or death.

To check the current, disconnect the “Loop” wire from the EPS module as shown in Figure 23 and
connect the DC ammeter as shown to measure and verify the current flow.

PSD-QS (02/16) Page 32

Figure 23. Test for DC Current

Start-Up Process

CAUTION!

components. Failure to do so will cause lockout on start-up.

1) System Leak Check

During the Evacuation and Initial Charging processes, be sure that ALL
power to the EarthLinked® System is OFF. This includes the
compressor unit, air handler and all other electrically powered system

After all indoor and outdoor refrigerant bearing components of the system have been installed and
joints have been nitrogen brazed, pressurize the system prior to evacuation to leak test the system.

Do not exceed 150 psig when pressure testing the compressor unit and indoor system components.
Test for leaks with a sensitive electronic leak detector and bubble solution.
Repair leaks as appropriate prior to evacuation.
Evacuation and charging of the system is done through the compressor unit. All of the refrigerant

containing components in the compressor unit are illustrated in Figures 24 and 25.
The Start-up Process is illustrated in Figure 32.

PSD-QS (02/16) Page 33

Figure 24. PSD Internal Flow Schematic

PSD-QS (02/16) Page 34

PSD-QS (02/16) Page 35

Figure 25. PSD Piping

2) Evacuation

IMPORTANT!

IMPORTANT!

Refer to Figure 26 and the following procedure:

1. Carefully vent any pressurized nitrogen charge from the compressor unit and system..

2. After venting the pressurized system, use a good quality gage manifold and a non-permeable
hose set as shown in Figure 26. If possible, use two Schrader core removal tools. Install one
on the discharge line access port and the other on the initial charging port. Removal of the
Schrader cores will reduce the time to achieve the desired vacuum.

3. Attach a good quality digital vacuum gage with an isolation valve to the liquid line service valve
access port as shown in Figure 26.

4. Use a well maintained, high quality vacuum pump with an isolation valve, rated at 7 cfm or
greater connected to the gage manifold. Ensure that the vacuum pump oil has been changed
prior to initiating the evacuation process to avoid contamination.

5. Fully open the LP and HP valves and both service valves. Reference Figure 26.

DO NOT ENERGIZE THE COMPRESSOR WHILE THE SYSTEM IS UNDER
VACUUM. THIS WILL CAUSE DAMAGE TO THE COMPRESSOR.

6. Open the vacuum pump isolation valve and start the pump. Evacuate the system down to
400 MICRONS or less as read on the digital vacuum gage. After 400 microns or less has

been achieved, isolate the vacuum pump. Wait 5 minutes and read the digital vacuum gage.
The system pressure must not exceed 500 MICRONS WITHIN 15 MINUTES. If it does,
continue the evacuation to remove any remaining non-condensibles in the system. A dry
system will hold 500 microns for 15 minutes.

A procedure often used to evacuate a system, known as the triple evacuation method, is

detailed in the section of this manual entitled Triple Evacuation.
Local codes may require other evacuation criteria, in which case the local codes take

precedence over the evacuation requirements described above.

DO NOT CHARGE THE SYSTEM UNTIL THE CONDITIONS OF STEP #6
ARE COMPLETED!

7. When the system has been successfully evacuated, close the LP and HP valves on the
manifold gage set. Do not remove the manifold gage set or hoses, as air will be drawn
into the system and defeat the evacuation process.

PSD-QS (02/16) Page 36

PSD-QS (02/16) Page 37

Figure 26. Evacuation of PSD System

WARNING!

Inhalation of high concentrations of refrigerant gas vapor is harmful and
may cause heart irregularities or death. Vapor reduces oxygen available

the refrigerant container. Do not overheat.

3) Initial Charge

1. Disconnect the vacuum pump and isolate the digital vacuum gage. Connect the refrigerant
container to the charging hose of the manifold gage set as shown in Figure 27.

for breathing and is heavier than air. Decomposition products are
hazardous. Liquid contact can cause frostbite. Avoid contact of liquid
with eyes and prolonged skin exposure. Liquid and gas are under
pressure. Deliberate inhalation of refrigerant gas is extremely

dangerous. Asphyxiation can occur without warning due to lack of

oxygen. Before using, read the material safety data sheet. Use proper
safety measures when charging the system, especially when warming

2. Place the refrigerant container upside down, with the refrigerant valve at the bottom, on the
scale, as shown in Figure 27. Purge the charging hose by loosending it at the manifold end,
until refrigerant is released. Tighten the charging hose and zero out the refrigerant scale.

3. Open the LP valve on the manifold gage set. Opening the refrigerant container valve sends
liquid refrigerant through the initial charging port into the system. Continue to add refrigerant
until 3 pounds per ton of system capacity has been added. In cold weather, it may be
necessary to warm the refrigerant container to charge to 3 pounds per ton.

4. After completing the initial refrigerant charge to the system, turn the LP valve off, re-install the
Schrader valve core into the initial charging port, remove the tool, and install the Schrader
valve cap firmly on the Schrader valve.

PSD-QS (02/16) Page 38

Figure 27. Initial Charge of PSD System

PSD-QS (02/16) Page 39

4) Final Charge

1. Remove the Schrader core tool from the hose just taken off of the initial charging port.

2. Crack open the LP valve on the manifold gage set so that a small amount of refrigerant gas
flows to purge the hose. Connect the hose to the final charging port, shown in Figure 28.
Tighten the hose to the final charging port and turn off the LP valve when the hose connection
is secure.

3. Start the system in heat mode. Disconnect the control wire from the “O” terminal to ensure
the system remains in the heat mode during the final charging process. In an air system, the
design (and minimum) air flow is 400 cfm per nominal ton. In a hydronic system, the design
(and minimum) circulating water flow to 3 pgm per nominal ton. As installed, higher than
design air and circulating water flows are acceptable, recognizing that this will cause greater
power consumption by the air handler and circulating pump motors.

4. Slowly open the LP valve on the manifold gage set and add refrigerant just fast enough to
maintain the suction pressure.

5. Slowly add refrigerant until liquid refrigerant is clearly seen in the middle sight glass of the
ACC, as shown in Figure 29.

6. Shut the LP valve on the manifold gage set and run the system for 20 minutes to ensure that
the refrigerant liquid level remains at the middle slightly glass. If the liquid refrigerant level
drops below the middle sight glass during this time, slowly add refrigerant until the liquid level
stabilizes at the middle sight glass.

7. With the liquid refrigerant level at the middle sight glass, attach and insulate a temperature
clamp or probe securely to the earth loop vapor line at the compressor unit service valve
shown in Figure 28. Read the measured temperature. Also read the LP gage pressure on the
manifold gage set. Use a pressure/temperature chart (Figure 31) to verify that the system is
operating at saturation, meaning that no superheat is measured on the earth loop vapor line.
To verify this, the measured vapor line temperature should be within ± 3°F of the saturation
temperature read from the chart for the measured LP gage pressure. If the measured
temperature is out of this range, contact ETI technical support at 1/863-701-0096.

8. After verifying that the system is operating at saturation in heating mode, and with the
system still operating in heating mode, slowly open the LP valve on the manifold gage set,
and slowly add refrigerant to the system until the refrigerant liquid level is at, but not
above, the top ACC sight glass, as shown in Figure 30. At no time should the refrigerant
liquid level be above the top ACC sight glass.

9. The system is now fully charged. Document the weight of the refrigerant charge in the
system. Write it down on the Warranty Registration Card and inside the compressor unit on
the electrical diagram, for future reference.

10. Re-connect the control wire to the”O” terminal. The system is now operational in heating and
cooling modes.

PSD-QS (02/16) Page 40

Figure 28. Final Charge of PSD System

PSD-QS (02/16) Page 41

Figure 29. Charging to the Middle Sight Glass

Figure 30. Charging to the Top Sight Glass

PSD-QS (02/16) Page 42

TEMPERATURE

(°F)

PRESSURE

(psig)

TEMPERATURE

(°F)

PRESSURE

(psig)

-20

26.1 70

199.2

-15

30.8 75

216.1

-10

35.9 80

234.0

-5

41.5 85

253.0

0

47.5 90

273.0

5

54.1 95

294.1

10

61.2 100

316.4

15

68.8 105

339.9

20

77.1 110

364.6

25

86.0 115

390.5

30

95.5 120

417.7

35

105.7

125

446.3

40

116.6

130

476.3

45

128.3

135

507.6

50

140.8

140

540.5

55

154.1

145

574.8

60

168.2

150

610.6

65

183.2

Figure 31. Pressure-Temperature for R-410A

PSD-QS (02/16) Page 43

PSD-QS (02/16) Page 44

Figure 32. Start-Up Process

Troubleshooting

CAUTION!

SERVICE MAY BE PERFORMED ONLY BY AN EARTHLINKED
TECHNOLOGIES AUTHORIZED PROFESSIONAL HVAC OR
REFRIGERATION SERVICE PERSON. USE ONLY SAFE AND
APPROVED SERVICE TECHNIQUES.

IMPROPER INSTALLATION, ADJUSTMENT, ALTERATION,
MAINTENANCE OR SERVICE CAN CAUSE 1) THE
EARTHLINKED® SYSTEM OR COMPONENTS TO MALFUNCTION
AND OR FAIL, 2) PROPERTY DAMAGE, INJURY OR DEATH.

IMPORTANT!

cut-out temperature is 240°F. This is a manual reset switch.

EarthLinked® Refrigerant System Safety Switches
EarthLinked® compressor units are equipped with the following three

safety switches that will turn the compressor off if the following limits
are exceeded.

High Pressure Switch: Located between the compressor discharge port and

the reversing valve, the cut-out pressure is 600 psig. This is a manual reset
switch.

Low Pressure Switch: Located between the ACC and the compressor
suction port, the cut-out pressure is 25 psig. This is an automatic reset
switch.

Discharge Temperature Switch: Located at the compressor discharge, the

If you experience difficulties with the EarthLinked® system, please review the appropriate section of
the manual. It may be helpful to have another professional HVAC or refrigeration service person
review and check it with you.

Time and expense can be saved by taking a thoughtful and orderly approach to troubleshooting.
Start with a visual check: Are there loose wires, crimped tubing, missing parts, etc?

1) Compressor

After setting the remote (wall) thermostat system switch to the “OFF” position and the thermostat fan

switch to the “AUTO” position, proceed to check the supply voltage at (1) the line terminals to the

breaker/disconnect; 2) the system side of the breaker/disconnect, and 3) the line-side of the
transformer. Verify the proper voltage rating for the system. Reference Figure 33.

PSD-QS (02/16) Page 45

Figure 33. Compressor Unit Voltage Information

The following compressor checklist is provided to analyze the compressor and determine if it is
operating properly or if it is faulty:

1. Electrical Service Panel – turn power off.
a. Check circuit connections for tightness
b. Circuit breaker sized right?
c. Wire size correct? (check NEC or local codes)

2. Check capacitor or other start components for bulges, overheating or loose
connections.

3. Test capacitor and start components and replace if necessary. Capacitors can be
checked by substitution or with capacitance meter. OK if reads ±10% of the
manufacturer’s specification.

4. Check incoming power supply voltage to determine whether it is within acceptable
voltage range. (See Figure 33)

5. Check voltage at compressor unit terminals to determine whether it is within
acceptable voltage range. (See Figure 33)

6. Running Amperage. Connect a clip-on type ammeter to the (common) lead to the
compressor. Turn on the supply voltage and energize the unit. The compressor will
initially draw high amperage; it should soon drop to the RLA value (See Figure 7) or less.
If the amperage stays high, check the motor winding resistance and/or run capacitor.

PSD-QS (02/16) Page 46

Note: Feel the top of the compressor to see if it has overheated. If it is hot, the internal

overload may be open. You may have to wait several hours for it to reset before
proceeding.

If the compressor draws a high amperage and does not start (amperage is approximately

locked rotor amperage – LRA (See Figure 7)), the compressor is locked mechanically
and should be removed from the system and replaced. Verify before removing!

7. Motor Circuit Testing

Using a digital volt-ohmmeter (VOM), measure the resistance across the compressor
windings as shown in Figure 34. The power leads to the compressor must be
disconnected before taking an electrical measurement. A good rule of thumb for single
phase compressors is that start winding resistance (R2) is 3 to 5 times greater than run
winding resistance (R1).

Figure 34. Compressor Motor Circuit Testing

8. Grounded Windings

PSD-QS (02/16) Page 47

Test the compressor motor for a grounded winding. The check should be made using an
ohmmeter capable of measuring very high resistance on a VOM. The resistance
between windings and the housing is one million to three million ohms for an
ungrounded winding.

Attach one lead to the compressor case on a bare metal tube or ground terminal, and to
each compressor terminal as shown in Figure 35. A short circuit at a high voltage
terminal indicates a motor defect (grounded).

Figure 35. Compressor Motor Grounded Winding Test

9. Compressor not pumping.

Connect gage block hoses to the suction and discharge pressure ports in the
compressor unit. Read pressure gages to affirm that system is pressurized with
refrigerant. Turn on power to compressor unit and run unit. Observe pressure gages. If
pressures on both gages remain the same, compressor is not pumping and there is a
possible internal failure. See System Troubleshooting Chart.

PSD-QS (02/16) Page 48

2) System

Problem /
Symptom

Likely Cause(s)

Correction

A. System does not

run.

Note: Some digital

thermostats have
a built-in five­minute time
delay.

1. Thermostat fault.

1. Adjust thermostat settings. / Replace
thermostat.

2. Power supply problem (AHU /

compressor unit).

2. Check power supply for adequate
phase and voltage. Check wiring to
system and external breakers or fuses.

3. Control voltage problem.

3. Check for 24V on terminal strip
between “R” and “C”.

4. Shut off by external thermostat or

thermostat is defective.

4. Check operation of thermostat.

5. System off on high pressure / low

pressure switches or discharge
temperature switch.

5. Reset limit switch. Analyze system for
root cause.

6. Internal component or connection

failure.

6. Check for loose wiring. Check
components for failure.

7. Compressor contactor not pulling in.

7. Check for 24V across contactor. Trace
24V circuit and components between

“Y” and “C” to locate fault. Repair or

replace as necessary.

8. Faulty run capacitor or start

components.

8. Test each and replace as necessary.

9. Compressor windings shorted or

grounded.

9. See compressor diagram/ replace the
compressor.

B. System runs for

long period or
continuously.

1. Thermostat fault.

1. Adjust thermostat settings / Replace
thermostat.

2. Refrigerant undercharged.

2. Repair leak. Evacuate and recharge
system.

3. Component failure (cooling mode).

3. Check pressures and electrical circuits
for abnormalities.

4. Outdoor thermostat not connected or

failed (heating mode).

4. Check outdoor thermostat and electric
supplemental heat operation. Confirm
proper wiring.

5. Reduced air flow.

5. Check air ducts for leaks and repair.
Check blower operation. Check air
filter(s). Remove air flow restrictions
(min.400 CFM/ton).

6. Four-way valve is short circuiting

refrigerant and bypassing hot gas to
suction.

6. Replace four-way valve, evacuate,
recharge and start-up system.

7. Unit undersized.

7. Contact ETI Technical Support at 863­701-0096.

C. System blows

fuses or trips
circuit breaker.

1. Inadequate circuit ampacity.

1. Note electrical requirement and correct
as necessary.

2. Short, loose or improper connection

in field wiring.

2. Check field wiring for problems.

3. Internal short circuit. Loose or

improper connection in system.

3. Check wiring in system. See
appropriate wiring schematics and
diagrams. Test components, especially
the compressor, for shorts and grounds.

PSD-QS (02/16) Page 49

Figure 36. System Troubleshooting Chart

C. System blows

fuses or trips
circuit breaker
(con’t)

4. Excessively high or low supply

voltage or phase loss (3 only).

4. Note voltage range limitations specific
to the compressor.

5. Faulty run capacitor or soft start

components.

5. Replace as necessary.

D. Air handler fan will

not run.

1. Thermostat defective.

1. Check for 24V power on eight-post
terminal strip between “C” and “G”.

2. Defective fan relay in air handler.

2. Check relay operation and continuity of
terminals.

3. Faulty motor/capacitor.

3. Refer to ECM troubleshooting.

E. System will not

switch to cooling
mode (continues
to run in heating
mode).

1. Thermostat faulty.

1. Check operation of thermostat and
replace if necessary.

2. Open heat/cool circuit (orange

wire).

2. Check for 24V on eight-post terminal
strip between “O” and “C”.

3. Four-way valve solenoid not

energized.

3. Check for magnetism at end of valve
coil.

Check for 240V at coil. Check Heat/Cool

Relay.

4. Four-way valve stuck in heat

mode.

4. Contact ETI Technical Support at 863­701-0096.

F. Compressor turns

off on thermal
overload.

(check until

compressor’s

temperature
reaches room
temperature
before
determining the
internal overload
is defective)

1. Refrigerant leak.

1. Check for refrigerant level in ACC.
Repair leak, evacuate system and
recharge with refrigerant.

2. System undercharged.

2. Charge system.

3. Four-way valve is short circuiting

refrigerant and bypassing hot gas
to suction.

3. Replace four-way valve, evacuate,
recharge and start-up system.

4. Compressor valves are faulty/

bypassing.

4. Use Rubber Mallet on Scroll Comp’s.
before condemning. Replace
compressor and evacuate, recharge
and start-up system.

5. Compressor contactor dirty or

pitted. (> .5 Ohms Resistance
across Contact points)

5. Replace as necessary.

6. Faulty run capacitor or start

components.

6. Replace as necessary.

7. Compressor with locked rotor.

7. Replace as necessary.

G. Uncomfortable

temperature.

(Not enough

heat/cold air)

1. Thermostat fault.

1. Adjust thermostat settings / Replace
thermostat.

2. Defective heating element(s).

(Heating mode).

2. Check resistance element(s) for
continuity.(Heating mode only)

3. Defective heater relay.

(Heating mode).

3. Check relay for proper operation.
Replace if defective. (Heating mode
only)

4. Thermal limit is open. (heat kit)

4. Check continuity across thermal limit
switch. (Heating mode only)

5. Compressor fault.

5. To reset switch, turn primary power off
then back on; turn thermostat system
switch to OFF, then back on.

6. Outdoor thermostat not connected

or failed (heating mode).

6. Check outdoor thermostat and electric
supplemental heat operation. Confirm
proper wiring. (Heating mode only)

PSD-QS (02/16) Page 50

Figure 36. System Troubleshooting Chart (con’t)

G. Uncomfortable

temperature.

(Not enough

heat/cold air)

(cont’d)

7. Refrigerant undercharged.

7. Check for refrigerant level in
ACC.(Heating mode only)

Repair leak, evacuate and recharge the

system. Check In-line sight glass in
cooling mode.

8. Restriction in refrigerant circuit.

8. Check for blockage or restriction,
especially in Liquid Flow Control.
Assure that modification of non-ETI air
handler is performed. Check valves,
filter/dryer and anti-migration valve.

9. System is locked out on high or

low pressure.

9. Check low pressure and high pressure:
Check limit cut-off pressures. Control

is set to actuate at 5 (R-22 &
407C)/25psig (R-410A) (low pressure)
and 400 (R-22 & 407C)/600 psig (R­410A) (high pressure) +10%. Check for
continuity on both switches under
normal pressure conditions. Refer to
Unit performance table.

10. Defective pressure control.

10. Check limit cut-off pressures. Control

is set to actuate at 5 (R-22 &
407C)/25psig (R-410A) (low pressure)
and 400 (R-22 & 407C)/600 psig (R­410A) (high pressure) +10%. Check for
continuity on both switches under
normal pressure conditions.

11. Reduced air flow.

11. Check air ducts for leaks and repair.

Check blower operation. Check air
filter(s). Remove air flow restrictions
(min.400 CFM/ton).

12. Unit undersized/ oversized.

12. Contact ETI Technical Support at 863-

701-0096.

H. Poor Compressor

Performance

(Runs, but Not

pumping
Refrigerant)

1. Reversing Valve stuck and
Compressor will not create a
pressure difference between high
and low side of the system.

1a. Pinch closed the Discharge Line to

verify the Compressor builds High
Pressure, if so, replace Reversing
Valve.

1b. If High pressure does not build after

pinching the Discharge Line closed, the
Compressor has failed, replace
Compressor.

2. Bad Compressor

2. Replace after verification of Amp Draw

below RLA and pinch closed the
Discharge Line between the
Compressor and the reversing Valve to
verify pressure does not build on the
high side.

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Figure 36. System Troubleshooting Chart (con’t)

Commissioning Document

The document that follows (LIT-170) enables verification and documentation of system component
model numbers, location of underground system components and system performance for air and
hydronic heating and cooling.

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Tools and Equipment

The purpose of the following list is to highlight key pieces of equipment, tools and materials necessary
for the installation, maintenance and servicing of EarthLinked® Heating and Cooling System HVAC
(above ground) equipment.

The professional HVAC technician is expected to have a compliment of standard tools for the general
servicing of refrigeration equipment.

Equipment, Tools and Materials

ITEM DESCRIPTION

Vacuum Pump (7 CFM or greater capacity with isolation valve)
Evacuation Manifold (for vacuum pump)
Digital Vacuum (micron) Gauge and Isolation Valve
Schrader Valve Core Removal Tool (quantity of 2)
Charging/Evacuating Manifold for R-410A
Charging/Hi-Vacuum Hoses (black, quantity of 6)
Digital Refrigerant Scale
Digital Thermometer
Digital Sling Psychrometer
Air Flow Meter (for air handlers)
Nitrogen Tank with 0 – 600 psig Regulator and Handtruck
Oxy-acetylene Welding Torch Set
15% Silver Brazing Alloy
Refrigerant Recovery Unit (1/2 #/minute minimum vapor capacity)
Recovery Cylinder (50# capacity)
Halogen Leak Detector
Digital VOM
Digital Clamp-on Ammeter
Digital Water Flowmeter (3 to 30 gpm)
Tubing Cutters
Tubing Benders
Nut Driver
Cordless Drill (3/8”)
Swaging Kit
Deburring Tool
Drill Bit Set
Inspection Mirror

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Triple Evacuation

Triple evacuation is implemented to evacuate a system to a deep vacuum. It is accomplished by
evacuating a system to a vacuum of 1500 microns, and then bleeding a small amount of dry nitrogen
into the system. The nitrogen is then blown out to the atmosphere. The system is then evacuated
until the vacuum is again reduced to 1500 microns. This procedure is repeated three times, with the
last vacuum level reaching a deep vacuum of 400 microns, which is held for 10 to 15 minutes. The
following is a detailed description of the triple evacuation.

1. Attach an electronic micron gage to the system. The best place is as far from the vacuum port
as possible, which would be the access port on a service valve on the EarthLinked®
compressor unit.

2. Let the vacuum pump run until the digital vacuum gage reaches 1500 microns. After reaching
1500 microns, isolate the digital vacuum gage.

3. Allow a small amount of dry nitrogen to enter the system until the LP gage shows about 5 psig.
This small amount of dry nitrogen will fill the system and mix with the other vapors.

4. Release system pressure to 0 psig and close the valve. Then open the isolation valve on the
digital vacuum gage.

5. Open the vacuum pump valve and start the vapor removal process from the system again.
Let the vacuum pump run until the vacuum is again reduced to 1500 microns.
Repeat Step 3.

6. After nitrogen has been added to the system a second time, open the vacuum pump valve
and again remove the vapor. Operate the vacuum pump until the vacuum on the electronic
micron gage reads 400 microns.

7. Once the micron gage reads 400 microns for 10 to 15 minutes, isolate the micron gage. The
system must not exceed 500 microns in 15 minutes. If it does, repeat step 6.

8. Then charge the system in accordance with the initial refrigerant charging procedure.

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