Friedrich 9, 000 BTU'S Electrical Troubleshooting Chart Cooling 24K BTU, Circuit Breakers are

Page 43

ELECTRICAL TROUBLESHOOTING CHART - COOLING

24K BTU

NO COOLING OPERATION

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Compressor and outdoor fan motor run but indoor blower does not run

Yes

Indoor blower runs but outdoor fan motor and compressor do not run

Yes

No

Set thermostat to "Cool," move the Temp. lever below the present Room Temp.

O.K.

Compressor outdoor fan motor and indoor blower should now operate

Yes

See Refrigerant Circuit diagnosis if unit still is not cooling properly

Nothing operates, entire system appears dead

 

 

 

No

Yes

 

 

 

Line voltage present at the Transformer Primary

Yes

24 Volts at

“R” Terminal on board

Yes

24 Volts present at Y terminals on t-stat and board?

Yes

No

No

No

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

 

 

 

 

 

 

208/230 Volts present

 

 

24V at t-stat and

 

Defective t-stat

 

 

 

at #1 relay and “OD”

 

 

 

 

 

 

 

 

 

 

 

 

terminal on board?

No

 

 

defective control wiring

 

 

 

 

control wiring?

No

 

 

 

 

 

 

 

or transformer

 

 

 

 

Yes

 

 

 

 

 

 

 

 

 

 

Yes

 

 

 

 

 

 

 

 

 

 

 

 

 

 

208/230 Volts present

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

at compressor’s

 

 

 

 

 

 

 

 

No

 

 

 

 

 

 

 

contactor?

 

 

 

 

 

 

 

 

Yes

 

 

 

Yes

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

No

Is Line Voltage present

 

 

Problems indicated

 

 

 

 

 

 

 

 

 

 

in Blower Relay

 

 

 

 

 

 

 

 

at Motor Leads?

No

 

 

 

 

 

 

 

 

 

 

 

 

of board

 

 

Supply Circuit

 

Is Locked Rotor

 

 

Yes

 

 

 

 

 

problems, loose

 

 

 

 

 

 

 

 

Connections, or bad

 

Voltage a minimum of

 

 

 

 

 

 

No

 

 

 

 

 

 

 

Relays/Board

197 Volts?

 

 

 

 

 

 

 

 

 

 

 

 

Yes

Check Capacitor, is

 

 

Replace Capacitor

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Capacitor Good?

No

 

 

Replace Capacitor

 

Are Capacitor and (if

 

 

 

 

 

 

 

 

 

 

 

 

 

 

and/or Start Assist

 

so equipped) Start

 

 

Yes

 

 

 

 

 

Device

No

Assist good?

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Possible motor

 

 

 

 

 

Yes

 

 

 

 

 

 

 

 

 

Motor should run

 

 

problem indicated.

 

 

 

 

 

No

 

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

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Replace board

Check contactor

If defective replace

Compressor and outdoor fan motor should now operate

Yes

See Refrigerant

Circuit Diagnosis

if unit still is not

cooling properly

41

Image 43
Contents Single Package Vertical Air Conditioning System Technical Support Contact Information Table of Contents Your safety and the safety of others are very important Important Safety InformationRefrigeration System Hazards Property Damage Hazards IntroductionSerial Number Identification Guide Electric Heat Data Chassis SpecificationsVEA Extended Cooling Performance Extended Cooling PerformanceVEA/VHA09-24 VEA Extended Cooling Performance Electric 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 Diagnostics Electronic control error codes diagnostics and test modeTest Mode Power On and Off Features on the Electronic Control Cool mode control features for cool with electric heat units Compressor operation depends on t-stat settings VERT-I-PAK Single Packaged Vertical AIR Conditioners Component description / A-Series specificationsExternal Static Pressure Indoor Airflow Data Capacitor Connections Components TestingCapacitors Capacitor Check with Capacitor AnalyzerHeater Elements and Limit SWITCHES’ Specifications Components TestingDrain PAN Valve Refrigeration Sequence of Operation Refrigeration AssemblyCUT/SEVER Hazard ServiceRisk of Electric Shock Sealed Refrigeration System RepairsEquipment Required Equipment Must be CapableBurn Hazard Method Of Charging / RepairsFreeze Hazard Overcharged Refrigerant Systems Undercharged Refrigerant SystemsRestricted Refrigerant System Capillary Tube Systems Hermetic Components CheckMetering Device Check ValveReversing Valve DESCRIPTION/OPERATION Checking the Reversing Valve Testing the CoilExplosion Hazard Procedure For Changing Reversing ValveTouch Test in Heating/Cooling Cycle Fire HazardCompressor Checks Ground Test Single Phase Resistance TestChecking Compressor Efficiency Recommended procedure for compressor replacement Compressor ReplacementHigh Temperatures Rotary Compressor Special Troubleshooting and Service AIR Filter Routine MaintenanceCoils and Base PAN Excessive Weight Hazard Blower Wheel / Housing / Condenser FAN / ShroudCondensate Disposal System Routine MaintenanceSleeve / Drain Front Cover9K 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 Outdoor Coil Return Air Indoor Coil Wall Plenum AccessoriesDrain PAN Friedrich Air Conditioning Company Technical Support Contact Information Friedrich AIR Conditioning CO