Heat Controller HEV/H manual Functional Troubleshooting, Fault Htg Clg Possible Cause Solution

Page 42

Installation, Operation & Maintenance

 

HEV/H SERIES

Heat Controller, Inc.

 

 

 

 

 

 

 

 

 

 

FUNCTIONAL TROUBLESHOOTING

 

 

 

 

 

 

 

 

Fault

Htg

Clg

Possible Cause

Solution

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Check Line Voltage circuit breaker and disconnect

 

 

Main Power Problems

X

X

Green status LED off

Check for line voltage between L1 and L2 on the contactor

 

 

Check for 24VAC between R and C on DXM

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Check primary/secondary voltage on transformer

 

 

 

 

X

Reduced or no water flow

Check pump operation or valve operation/setting

 

 

 

 

 

in cooling

Check water flow adjust to proper flow rate

 

 

 

 

 

 

 

 

 

 

 

 

X

Water t emperature out of range in

Bring water temp within design parameters

 

 

 

 

 

 

 

 

 

 

cooling

 

 

 

 

 

 

 

 

Check for dirty air filter and clean or replace

 

 

HP Fault Code 2

X

 

Reduced or no air flow

Check fan motor operation and airflow restrictions

 

 

High Pressure

 

in heating

Dirty air coil- construction dust etc.

 

 

 

 

 

 

 

 

 

 

 

Too high of external static. Check static vs blower table

 

 

 

X

 

Air t emperature out of range in

Bring return air temp within design parameters

 

 

 

 

heating

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

X

X

Overcharged with refrigerant

Check superheat/subcooling vs typical operating condition

 

 

 

table

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

X

X

Bad HP switch

Check switch continuity and operation - Replace

 

 

 

 

 

 

 

 

 

 

X

 

Frozen water heat exchanger

Thaw heat exchanger

 

 

 

X

X

Bad HPWS Switch

Replace HPWS Switch

 

 

 

 

 

 

 

 

 

LP/LOC Fault-Code 3

X

X

Insufficient charge

 

Check for refrigerant leaks

 

 

 

 

Compressor pump down at start-

Check charge and start-up water flow

 

 

Low Pressure/Loss of Charge

X

 

 

 

 

up

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Reduced or no water flow

Check pump operation or water valve operation/setting

 

 

 

X

 

Plugged strainer or filter - clean or replace

 

 

 

 

in heating

 

 

LT1 Fault - Code 4

 

 

Check water flow adjust to proper flow rate

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Water Low Temperature

X

 

Inadequate anti-freeze level

Check antifreeze density with hydrometer

 

 

 

 

 

 

 

 

 

 

X

 

Improper low temperature setting

Clip LT1 jumper for antifreeze (10°F) use

 

 

 

 

 

(30°F vs 10°F)

 

 

 

 

 

X

 

Water t emperature out of range

 

Bring water temp within design parameters

 

 

 

X

X

Bad thermistor

Check temp and impedance correlation per chart

 

 

 

 

 

Reduced or no air flow

Check for dirty air filter and clean or replace

 

 

 

 

X

Check fan motor operation and airflow restrictions

 

 

 

 

in cooling

 

 

 

 

 

Too high of external static - check static vs blower table

 

 

 

 

 

 

 

 

 

LT2 Fault - Code 5

 

X

Air temperature out of range

Too much cold vent air - bring entering air temp within

 

 

 

design parameters

 

 

Low Air Temperature

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

X

Improper low temperature setting

Normal airside applications will require 30°F only

 

 

 

 

 

(30°F vs 10°F)

 

 

 

 

 

X

X

Bad thermistor

Check temp and impedance correlation per chart

 

 

 

X

X

Blocked drain

Check for blockage and clean drain

 

 

 

X

X

Improper trap

 

Check trap dimensions and location ahead of vent

 

 

 

 

 

 

 

Check for piping slope away from unit

 

 

Condensate Fault-Code 6

 

X

Poor drainage

Check slope of unit toward outlet

 

 

 

 

 

 

Poor venting - check vent location

 

 

High Condensate Level

 

X

Moisture on sensor

 

Check for moisture shorting to air coil

 

 

 

X

X

Plugged air filter

Replace air filter

 

 

 

X

X

Restricted return air flow

Find and eliminate rectriction - increase return duct

 

 

 

and/or grille size

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Check power supply and 24VAC voltage before and during

 

 

 

 

 

 

 

operation

 

 

 

X

X

Under voltage

Check power supply wire size

 

 

Over/Under Voltage-Code 7

Check compressor starting. Need hard start kit?

 

 

 

 

 

 

 

 

 

 

 

 

Check 24VAC and unit transformer tap for correct power

 

 

(Auto Resetting)

 

 

 

 

 

 

 

 

 

 

supply voltage

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Check power supply voltage and 24VAC before and during

 

 

 

X

X

Over voltage

operation.

 

 

 

Check 24VAC and unit transformer tap for correct power

 

 

 

 

 

 

 

 

 

 

 

 

 

 

supply voltage

 

 

 

 

 

 

 

 

 

Unit Performance

X

 

Heating Mode LT2>125°F

Check for poor air flow or overcharged unit

 

 

 

 

 

 

 

 

 

Sentinel-Code 8

 

X

Cooling Mode LT1>125°F OR

Check for poor water flow, or air flow

 

 

 

 

LT2< 40°F

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Swapped Thermistor

X

X

LT1 and LT2 swapped

Reverse position of thermistors

 

 

Code 9

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

X

X

Blower does not operate

Check blower line voltage

 

 

 

 

 

 

 

Check blower low voltage wiring

 

 

 

 

 

 

 

 

 

ECM Fault - Code 10

 

 

Blower operating with incorrect

Wrong unit size selection

 

 

 

 

 

airflow

 

 

 

 

 

 

Wrong unit family selection

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Wrong motor size

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Incorrect blower selection

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C

 

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Contents Residential Packaged Geothermal Heat Pump Table of Contents Configuration Supply AIR Options Unit NomenclatureSafety General Information Physical Data Vertical UpflowHE Vertical Upflow Dimensional Data Return Connection Standard Deluxe Filter Frame Vertical Installation Vertical Unit LocationSound Attenuation for Vertical Units Condensate Piping for Vertical UnitsVertical Installation Horizontal Unit LocationMounting Horizontal Units Horizontal Installation Typical Closed Loop Horizontal Unit InstallationField Conversion of AIR Discharge Field Conversion of Air DischargeSide to Back Discharge Conversion Water Connection Installation GROUND-LOOP Heat Pump ApplicationsLow Water Temperature Cutout Setting DXM2 Control AntifreezeGROUND-WATER Heat Pump Applications Open Loop Ground Water SystemsWater Quality Standards Water Control Valve Water Coil Low Temperature Limit SettingExpansion Tank and Pump Flow RegulationWater Quality Standards Water Quality StandardsTypical HWG Installation HOT Water GeneratorInstallation Water Tank Refill Water Tank PreparationHWG Water Piping Initial Start-UpGeneral Line Voltage Wiring Electrical Line VoltageElectrical Line Voltage HWG Wiring Electrical Power WiringPower Connection Volt OperationElectrical LOW Voltage Wiring Low Water Temperature Cutout SelectionThermostat Connections Accessory Connections Taco ValveThermostat Electrical Thermostat Wiring Thermostat InstallationECM Blower Control Blower Performance Data ECM Blower Performance Data TableWiring Diagram DXM2 Controls Unit OperationDXM2 Layout and Connections P11Unit Commissioning and Operating Conditions Operating LimitsCommissioning Conditions Unit Starting and Operating Conditions Unit Start-up Procedure Unit START-UP and Operating ConditionsUnit and System Checkout Unit START-UP Procedure Unit START-UP ProcedureUnit Operating Conditions HE Coax Water Pressure DropHE Series Typical Unit Operating Pressures and Temperatures Unit Operating Conditions Preventive Maintenance Troubleshooting DXM2 Process Flow Chart StartFunctional Troubleshooting Fault Htg Clg Possible Cause SolutionIFC Fault Code Troubleshooting Form 410AHEV/H Series 97B0016N11

HEV/H specifications

The Heat Controller HEV/H series represents a significant advancement in heating technology, designed to provide efficient and effective climate control for both residential and commercial spaces. This innovative range of heat pumps combines cutting-edge features with user-friendly functionality to offer a reliable solution for modern heating needs.

One of the standout features of the HEV/H series is its advanced inverter technology. This system allows the heat pump to adjust its output based on the specific heating requirements of the environment. By varying the compressor's speed, the HEV/H maintains a consistent temperature while significantly reducing energy consumption. This not only lowers utility bills but also reduces environmental impact, making it a more sustainable option compared to traditional heating methods.

The HEV/H series is equipped with a high-efficiency heat exchanger, which maximizes heat transfer and enhances overall performance. This component ensures that the system can operate effectively even in colder climates, providing reliable heating throughout the winter months. Additionally, the unit’s low noise operation is designed to maintain a peaceful environment, making it suitable for bedrooms, offices, and other noise-sensitive areas.

Another notable characteristic of the HEV/H series is its smart control features. Integrated with Wi-Fi connectivity, users can conveniently manage their heating settings remotely via a smartphone app. This feature allows for customized scheduling and temperature control, ensuring optimal comfort and convenience. Users can also receive real-time notifications on energy consumption and system performance, enhancing user engagement and control.

The HEV/H series also emphasizes durability and longevity. Constructed with high-quality materials, the units are designed to withstand the rigors of daily use while requiring minimal maintenance. The incorporation of advanced filtration systems helps to improve indoor air quality by capturing dust and allergens, which is especially beneficial for individuals with allergies or respiratory issues.

In summary, the Heat Controller HEV/H series exemplifies modern heating technology with its combination of efficiency, control, and user-friendly features. Its inverter technology, high-efficiency heat exchangers, smart connectivity, and durable construction make it an outstanding choice for anyone seeking to enhance their indoor climate while being conscious of energy usage and environmental impact. Whether for a home or business, the HEV/H series is poised to deliver exceptional heating solutions tailored to diverse needs.
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