Friedrich H)A12K34L, R410A Electrical Troubleshooting Chart Cooling, 9K BTU, 12K BTU, & 18K BTU

Page 33

ELECTRICAL TROUBLESHOOTING CHART - COOLING

9K BTU, 12K BTU, & 18K BTU

NO COOLING OPERATION

Compressor runs but Blower/Fan doesn't

Yes

24V at t-stat and

control wiring?

Yes

Is Line Voltage present

at Motor Leads?

Yes

Check Capacitor, is

Capacitor Good?

Yes

Motor should run

No

No

No

No

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Before continuing

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

check for Error

 

 

 

 

 

 

 

 

 

Insure that Fuses

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Codes, see

 

 

 

 

 

 

 

 

 

are good and/or that

 

 

 

 

 

 

electronics control

 

 

 

 

 

 

 

 

 

Circuit Breakers are

 

 

 

 

 

 

diagnostics and

 

 

 

 

 

 

 

 

on and voltage is 208/230

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

test mode, page 15

 

 

 

 

 

 

 

 

 

O.K.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Set thermostat to

 

 

 

 

Nothing operates,

 

 

 

 

 

 

 

 

 

"Cool," and the Temp.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

entire system

 

 

 

 

 

 

 

 

 

below the present

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

appears dead

 

 

 

 

 

 

 

 

 

Room Temp.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

O.K.

No

 

Yes

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Line voltage present

 

 

 

 

 

 

 

 

 

Compressor and Fan

 

 

 

 

 

 

 

 

Fan runs but

 

 

 

Motor should now

 

 

 

 

 

at the Transformer

 

 

 

 

 

 

 

 

 

 

 

Primary

No

 

 

Compressor doesn't

No

 

operate

 

 

 

 

 

 

 

 

 

Yes

 

 

Yes

 

 

 

 

Yes

 

 

 

 

 

 

 

 

 

24 Volts at

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

See Refrigerant Circuit

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

“R” Terminal on board

 

 

 

 

 

 

 

 

 

 

 

 

No

 

 

 

 

 

 

 

 

diagnosis if unit still is

 

 

 

 

 

 

 

 

 

 

 

 

 

 

not cooling properly

 

 

 

 

 

Yes

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

24 Volts present at

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Y terminals on

No

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

t-stat and board?

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Yes

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

208/230 Volts present

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Defective t-stat

 

 

 

 

 

 

 

 

 

 

at #1 relay on board?

No

 

 

defective control wiring

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

or transformer

 

 

 

 

 

 

 

 

 

 

 

 

Yes

 

 

 

 

 

 

 

 

 

 

No

 

 

 

 

 

 

 

 

 

 

Problems indicated

 

 

 

 

 

 

 

 

in Blower Relay

 

 

 

 

 

 

 

 

of board

 

 

Supply Circuit

 

Is Locked Rotor

 

 

 

 

problems, loose

 

 

 

 

 

 

 

 

Connections, or bad

 

Voltage a minimum of

 

 

No

 

 

 

 

Relays/Board

197 Volts?

 

Replace Capacitor

 

 

 

 

 

 

Yes

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Replace Capacitor

 

Are Capacitor and (if

 

 

 

 

 

 

 

 

 

and/or Start Assist

 

so equipped) Start

 

 

 

 

Device

No

Assist good?

 

 

 

 

 

 

 

 

 

 

Possible motor

 

 

 

 

 

 

Yes

 

problem indicated.

 

 

 

 

 

 

 

Check motor

 

 

 

 

 

 

 

 

thoroughly

 

 

 

 

 

 

 

 

 

 

Allow ample time

 

Have System

 

 

 

 

 

 

 

 

 

for pressures to

No

Pressures Equalized?

 

 

 

 

equalize

 

 

 

 

 

 

 

 

 

 

 

Yes

 

 

 

 

Possible Compressor

 

 

 

 

 

 

 

 

problem indicated.

 

Compressor should

 

 

No

 

 

 

 

See Compressor

 

run

 

 

 

 

Checks

 

 

 

 

 

 

 

 

 

 

 

Check Supply Circuit’s jumper at transformer. If okay, replace board

Problems indicated with

Control Transformer replace board

Problems indicated with

Room Thermostat or

Control Wiring

Replace board

Yes

Compressor and fan

motor should now

operate

Yes

See Refrigerant

Circuit Diagnosis if

unit still is not cooling

properly

31

Image 33
Contents R v i c e M a n u a l R 4 1 0 a M o d e l s Introduction Technical Support Contact InformationTable of Contents Your safety and the safety of others are very important Important Safety InformationRefrigeration System Hazards Property Damage Hazards Serial Number Year Manufactured Month ManufacturedProduction RUN Number Product Line Model Chassis SpecificationsIndoor WET Bulb TEMP. Degrees F AT 80 F D.B Extended Cooling PerformanceElectric Shock Hazard Electrical RequirementsRT5 Two speed fan RT4 One speed fan Remote Thermostat and Low Voltage Control ConnectionsThermostat Connections Quiet Start/Stop Electronic Control Board FeaturesElectronic Control Configuration Electronic Control Error Code Diagnostics DiagnosticsTest Mode Thermostat Compatibility Vpak electronic control FeaturesExternal Static Pressure Explanation of charts Capacitors Components TestingCapacitor Check with Capacitor Analyzer Capacitor ConnectionsComponents Testing Heater Elements and Limit SWITCHES’ SpecificationsDrain PAN Valve Refrigeration Sequence of Operation Refrigeration AssemblyCUT/SEVER Hazard ServiceEquipment Required Sealed Refrigeration System RepairsEquipment Must be Capable Risk of Electric ShockUndercharged Refrigerant Systems Method Of Charging / RepairsBurn Hazard Freeze HazardRestricted Refrigerant System Overcharged Refrigerant SystemsMetering Device Hermetic Components CheckCheck Valve Capillary Tube SystemsTesting the Coil Reversing Valve DESCRIPTION/OPERATIONChecking the Reversing Valve Procedure For Changing Reversing Valve Touch Test in Heating/Cooling CycleFire Hazard Compressor Checks External Overload Vpak 9, 12, 18 K Btus Single Phase Resistance TestInternal Overload Vpak 24 K Btus Ground TestCompressor Replacement Recommended procedure for compressor replacementHigh Temperatures Electrical Shock Hazard Routine Maintenance9K BTU, 12K BTU, & 18K BTU Electrical Troubleshooting Chart CoolingCircuit Breakers are Electrical Troubleshooting Chart Cooling 24K BTUHeat Pump Mode Electrical Troubleshooting Chart Heat PumpTroubleshooting Chart Heating Troubleshooting Chart CoolingElectric Heat VEA 09/12/18 with 2.5 KW, 3.4 KW or 5KWVHA 09/12/18 with 2.5 KW, 3.4 KW or 5KW Cool with Electric Heat Heat Pump with Electric Heat Cool with Electric Heat Heat Pump with Electric Heat Technical Service Data Technical Service DataVPK-ServMan-L Friedrich AIR Conditioning CO
Related manuals
Manual 7 pages 15.54 Kb Manual 61 pages 11.89 Kb Manual 27 pages 24.75 Kb

H)A09K25L, H)A12K50L, H)A09K50L, H)A24K10L, H)A24K25L specifications

Friedrich R410A is a refrigerant blend that has become a cornerstone in the HVAC industry, particularly for air conditioning systems. This hydrofluorocarbon (HFC) is known for its efficiency and environmentally friendly properties, making it a popular alternative to older refrigerants like R22.

One of the main features of R410A is its exceptional thermal efficiency. It has a higher cooling capacity compared to R22, which allows for smaller and more efficient equipment. This efficiency translates to reduced energy consumption and lower operating costs for users. Additionally, the higher pressure capability of R410A enables the design of more compact systems, which is particularly beneficial for residential and commercial applications where space is often limited.

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In terms of technology, R410A is typically utilized in systems that are designed specifically for this refrigerant. Equipment compatible with R410A often features advanced components that can handle the higher pressures required. Many modern air conditioning systems equipped with R410A also incorporate variable-speed compressors and advanced electronic controls, enhancing overall performance and comfort.

Additionally, R410A systems often come equipped with variable refrigerant flow (VRF) technology, which allows for precise temperature control in multiple zones of a building. This versatility makes R410A an ideal choice for both residential and commercial installations, providing optimal comfort throughout various spaces.

In summary, Friedrich R410A stands out due to its high energy efficiency, zero ozone depletion potential, and suitability for modern HVAC technologies. As the industry moves towards more sustainable practices, R410A serves as a reliable refrigerant that balances performance with environmental responsibility. It’s a significant choice for anyone looking to invest in efficient and eco-friendly heating and cooling solutions.