Envision Peripherals Geothermal Indoor Split Heat Pumps Troubleshooting, Refrigerant Systems

Page 32

ENVISION SERIES INSTALLATION MANUAL

Troubleshooting

Standard Microprocessor Controls

To check the unit control board for proper operation:

1.Disconnect thermostat wires at the control board.

2.Jumper the desired test input (Y1, Y2, W, O or G) to the R terminal to simulate a thermostat signal.

3.If control functions properly:

Check for thermostat and field control wiring (use the diagnostic inputs mode).

4.If control responds improperly:

Ensure that component being controlled is functioning (compressor, blower, reversing valve, etc.).

Ensure that wiring from control to the component is functioning (refer to the LED Definition table below and use the diagnostic outputs mode).

If steps above check properly, replace unit control.

LED Definitions and Diagnostics

Standard Microprocessor

 

NORMAL

 

 

 

 

DIAGNOSTIC MODES

 

 

 

 

LED

DISPLAY MODE

CURRENT

INPUTS

OUTPUTS 1

OUTPUTS 2

 

FAULT STATUS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Field Selection DIPS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SW2-

 

1 On

SW2-

 

1 Off

SW2-

 

1 NA

SW2-

 

1 NA

SW2-

 

1 NA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SW2-

 

6 On

SW2-

 

6 On

SW2-

 

6 Off

SW2-

 

6 On

SW2-

 

6 Off

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SW2-

 

7 On

SW2-

 

7 On

SW2-

 

7 On

SW2-

 

7 Off

SW2-

 

7 Off

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Drain

Drain Pan Overflow

Drain Pan Overflow

 

Y1

Compressor

 

Blower

Lockout

 

(On or Low)

 

Low

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FP Thermistor (Loop

FP Thermistor (Loop

 

 

 

Compressor

 

Blower

Water Flow

<15º F, Well<30ºF)

 

Y2

 

<15º F, Well<30ºF)

 

(On or High)

Medium

 

Lockout

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

High

High Pressure >600

High Pressure >600

 

O

Reversing Valve

 

Blower

Pressure

PSI Lockout

 

 

High

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Low

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Pressure,

Low Pressure <40

Low Pressure <40

 

G

Fan

 

Aux Heat 1

Current

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Sensor

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Airflow

ECM2 RPM <100

ECM2 RPM <100

 

W

DHW Pump

Aux Heat 2

RPM

 

RPM

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Status

Microprocessor

Not Used

 

SL1

Loop Pump 1

Aux Heat 3

Malfunction

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DHW Limit

HWL Thermistor

HWL Thermistor

Not Used

Loop Pump 2

Aux Heat 4

>130ºF

 

>130°F

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DHW Off

DHW Pump

DHW Pump Switch Off

 

 

 

Switch Off

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Refrigerant Systems

To maintain sealed circuit integrity, do not install service gauges unless unit operation appears abnormal. Compare the change in temperature on the air side as well as the water side to the tables on pages 26-27. If the unit’s performance is not within the ranges listed, and the airflow and water flow are known to be correct, gauges should then be installed and super- heat and subcooling numbers calculated. If superheat and subcooling are outside recommended ranges, an adjustment to the refrigerant charge may be necessary.

Notes: Refrigerant tests must be made with desuperheater turned “OFF”. Verify that air and water flow rates are at proper levels before servicing the refrigerant circuit.

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Contents Envision Series Geothermal Indoor Split Heat Pumps 410A Refrigerant Ton Single Speed Ton Dual CapacityPhysical Characteristics Model NomenclatureTable of Contents General Installation Information Equipment Selection Utilizing Existing Coil or Air HandlerAir Handler Installation Connection to Air CoilDual Fuel Systems Water Piping Swivel Connections Residential UnitsAir Handler Coil Data Line Set SizesEnvision Matching Air Coil Surface Rows TubeOpen Loop Well Water Systems Solenoid ValveSolenoid Wiring Water QualityClosed Loop Ground Source Systems Multiple Units on One Flow CenterDesuperheater Connections Water Tank PreparationPlumbing Installation Desuperheater StartupThermostat Wiring ElectricalGeneral Electrical DataWiring Schematics 24V Accessory relay see SW2 3 for description of operationHp Total Microprocessor Control Lockout Conditions Cooling OperationFan G only Operation Logic Data STG1 STG2 STG3 Emerg Single Speed UnitsDIP Switch Settings Freeze Sensing SettingPosition Description System Service RefrigerationLeak Testing System EvacuationInitial System Charge Calculation Charging the SystemDetermining Subcooling Pressure/Temperature Coversion Chart for R-410A Unit Operating Parameters Single Speed ModelsDual Capacity Models Startup Steps Before Powering Unit, Check The FollowingUnit Startup Final Evaluation Unit Startup/Troubleshooting Heating Cycle AnalysisDual Capacity Pressure Drop and Recommended Flow RatesSingle Speed Troubleshooting LED Definitions and DiagnosticsStandard Microprocessor Controls Refrigerant SystemsPreventive Maintenance Replacement ProceduresPhysical Dimensions Envision NZ Split Dimensional DataInstallation Notes

Geothermal Indoor Split Heat Pumps specifications

Envision Peripherals has established itself as a leader in the energy-efficient heating and cooling market with its advanced geothermal indoor split heat pumps. These systems are designed to utilize the earth's stable underground temperature as a renewable energy source, resulting in remarkable performance and sustainability.

One of the main features of Envision Peripherals geothermal indoor split heat pumps is their exceptional energy efficiency. With the ability to achieve a coefficient of performance (COP) exceeding 4.0, these heat pumps provide four units of heating or cooling for every unit of electricity consumed. This level of efficiency significantly reduces operational costs and lowers environmental impact, making them an ideal choice for eco-conscious consumers.

The technology employed in these systems emphasizes reliability and flexibility. The heat pumps are equipped with variable speed compressors, allowing them to adjust the heating and cooling output based on the current demands of the space. This results in consistent indoor temperatures and enhanced comfort. Moreover, the systems can seamlessly integrate with existing HVAC infrastructures, offering versatile installation options for residential and commercial applications.

Another characteristic that sets Envision Peripherals geothermal systems apart is their dual functionality. These units not only provide heating during the colder months but also excel in cooling during hot weather conditions. The geothermal heat pumps extract heat from the indoor air and transfer it to the ground, ensuring an efficient cooling process without the need for traditional air conditioning systems.

Durability and low maintenance are key aspects of Envision Peripherals heat pumps. Constructed with high-quality materials and advanced engineering, these systems are built to withstand varying environmental conditions. They feature a closed-loop system that minimizes wear and tear, reducing the frequency of repairs and providing homeowners and businesses with peace of mind.

In addition, Envision Peripherals emphasizes eco-friendliness. The use of renewable geothermal energy diminishes dependence on fossil fuels, contributing to a more sustainable living and working environment. Their commitment to sustainability aligns with global efforts to reduce greenhouse gas emissions and combat climate change.

In summary, Envision Peripherals geothermal indoor split heat pumps deliver exemplary energy efficiency, advanced technology, and a range of benefits, including dual functionality and reduced environmental impact. As the demand for sustainable heating and cooling solutions continues to grow, these systems represent a leading choice for consumers seeking comfort and energy savings.