Friedrich Comprehensive Guide to PTAC Circuit Board and Control Board Troubleshooting

Page 44

REMOTE WALL THERMOSTAT WIRING DIAGRAM

COOL WITH ELECTRIC HEAT

LEGEND FOR T-STAT WIRING HARNESS

R24 VAC Power From Unit

Y Coil for Cooling W Call for Heat

O Reversing Valve Energized in cooling mode

GL

Call for Low Fan

GH

Call for High Fan

RT6 - Two Speeds Fan T-Stat - Field Provided

-- -- -- Field Wiring

THERMOSTAT CONNECTIONS

 

 

 

 

 

 

 

 

 

GH

 

 

 

R

 

 

 

 

 

 

 

 

 

GL

 

 

 

Y

 

 

 

 

 

 

 

 

 

O

 

 

 

W

 

 

 

 

 

 

 

Wire

B

 

 

 

O

 

 

 

 

 

 

 

 

 

 

Jumper

Y

 

 

 

GL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

W

 

 

 

GH

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RC

 

 

 

C

 

 

 

 

 

 

 

 

 

RH

 

 

 

 

 

 

 

 

 

 

 

 

 

C

 

 

 

 

 

 

 

 

 

 

 

RT6

 

Disk control

EXT.

 

SW

 

 

 

 

or

EXT.

 

 

 

 

Auxillary fan

 

 

 

 

 

 

SW

 

 

 

 

 

 

 

Electronic

Control

Board

42

Image 44
Contents Ptac R410A Models Technical Support Contact Information Table of Contents Important Safety Information Your safety and the safety of others are very importantPersonal Injury or Death Hazards Introduction Mechanical HazardsGeneral Product Features Digital Packaged Terminal Air Conditioners & Heat Pumps Component Identification Accessories Pxfta Unit Identification Chassis Specifications Cooling & Heating Performance PDE 265V Extended Cooling Performance Electric Heat Data Electric Shock Hazard Power Cord Information 230/208V Models onlyElectrical Rating Tables Electrical Wiring for 265 Volt Models To Chassis Junction Remote Control Thermostat Installation Desk Control Terminals Friedrich Digital Control Features Digital Temperature+*&-.4-*2+4 DIP Switch #$%&#*%&+,-*&./0#&1!0*$#Digital Control Diagnostics Malfunction Analysis Fan can’t run or the fan speed is too slowKeep the air tightness well. Try not to use the electic Supply voltage is abnormal Components Testing CapacitorsCapacitor Check with Capacitor Analyzer Capacitor ConnectionsHeater Elements and Limit SWITCHES’ Specifications Drain PAN ValveRefrigeration Sequence of Operation 410A Sealed Refrigeration System Repairs Equipment RequiredEquipment Must be Capable Risk of Electric ShockMethod Of Charging / Repairs Undercharged Refrigerant SystemsBurn Hazard Freeze HazardOvercharged Refrigerant Systems Restricted Refrigerant SystemHermetic Components Check Metering DeviceCheck Valve Capillary Tube SystemsChecking the Reversing Valve Testing the CoilReversing Valve DESCRIPTION/OPERATION Fire Hazard Procedure For Changing Reversing ValveTouch Test in Heating/Cooling Cycle Compressor Checks Ground Test Single Phase Resistance TestExternal Overload High Temperatures Compressor ReplacementRecommended procedure for compressor replacement Routine Maintenance Electrical Shock HazardTroubleshooting Chart Cooling Troubleshooting Chart HeatingYES Electrical Troubleshooting Chart Heat PumpSystem Cools When Heating is Desired Electronic Control Board Electronic Control Board Wiring Diagram Component IDRT6 5558+131!8 Resistance Table for Air Indoor Temperature Sensor Temp Resistance Friedrich Packaged Terminal AIR Conditioners and Heat Pumps Ptac Exploded View Ptac Parts List PDE Models Ptac Parts List PDH Models Friedrich AIR Conditioning CO