Room Air Conditioners
Service Manual
2003
Table of Contents
Typical Unit Components
Introduction
2nd Digit
S S 08 J 1 0 R
3rd and 4th Digit - Approximate BTU/HR Cooling
8th Digit – Engineering
Page
EQ PERFORMANCE DATA
RS-RMPERFORMANCE DATA
PERFORMANCE
SS PERFORMANCE DATA
WS PERFORMANCE DATA
YS09J10B-A
PERFORMANCE DATA
YS12J33-A
YM18J34A-A
BTUH
Evaporator Air Temperature Rise
@70F Inside 62F Outside
9700
Refrigeration System Sequence of Operation
Electric shock hazard
Electrical Rating Tables
Installation Notes
Wire Size
COMPRESSORS
COMPONENTS OPERATION & TESTING
THERMAL OVERLOAD External
WINDING TEST
TERMINAL OVERLOAD Internal
TERMINAL OVERLOAD - TEST
CHECKING THE INTERNAL OVERLOAD
FAN MOTOR
1.Off Position - no continuity between terminals
SYSTEM CONTROL PANEL EQ Model Only See Figure
SYSTEM CONTROL PANEL KQ Models Only- See Figure
SYSTEM CONTROL PANEL YQ Model Only
SYSTEM CONTROL SWITCH WE & WY Models See Figure
SYSTEM CONTROL SWITCH - TEST
SYSTEM CONTROL PANEL
SYSTEM CONTROL PANEL See Figure
SYSTEM CONTROL SWITCH See Figure
SYSTEM CONTROL SWITCH - TEST
SYSTEM CONTROL SWITCH
Heat Pump & Electric Heat Models
TO ADJUST FAN SPEED
TO ADJUST TEMPERATURE
Smart Center Electronic Control Center
TO SET MODE OF OPERATION
TESTING THE ELECTRONIC CONTROL
TO SET THE TIMER
TESTING THE ELECTRONIC CONTROL
ERROR CODE LISTINGS
THERMOSTAT SQ & KQ Models - See Figure
TEST
TEST
THERMOSTAT YQ Model Only See Figure
TEST
THERMOSTAT ADJUSTMENT
DEFROST THERMOSTAT Heat Pump Models Only
THERMOSTAT BULB LOCATION
Retainer
DEFROST BULB LOCATION Heat Pump Models Only
RESISTOR: Heat Anticipator See Figure
CAPACITOR, RUN See Figure
HEAT PUMPS: REVERSING VALVE See Figure
CHECK VALVE OPERATION
TESTING REVERSING VALVE
SOLENOID COIL Heat Pump Models Only See Figure
TO TEST
VALVE, DRAIN PAN See Figure
NOTE: Always replace with the exact replacement
HEATING ELEMENT See Figure
SEALED REFRIGERATION SYSTEM REPAIRS
HERMETIC COMPONENT REPLACEMENT
REFRIGERANT CHARGING
SPECIAL PROCEDURE IN THE CASE OF
TROUBLESHOOTING AND SERVICE
METHOD OF CHARGING
Undercharged Refrigerant Systems
NOTE: Heat pump refrigeration drawing
Overcharged Refrigerant Systems
Restricted Refrigerant System
Routine Maintenance
not shift from cool to heat
Valve will not shift from cool to heat Valve will
Starts to shift but does not complete reversal
Apparent leap in heating
PROBLEM
Troubleshooting: Cooling
PROBLEM
PROBLEM
PROBLEM
PROBLEM
PROBLEM
POSSIBLE CAUSE
Poorly installed unit
Evaporator drain pan cracked or
PROBLEM
Troubleshooting: Heating Heat pumps
PROBLEM
PROBLEM
Outdoor thermostat does not cut off
PROBLEM
PROBLEM
POSSIBLE CAUSE
TO CORRECT
PROBLEM
Troubleshooting: Heating Cooling/Electric Models
PROBLEM
PROBLEM
REFRIGERANT SYSTEM DIAGNOSIS COOLING
Troubleshooting Chart — Cooling
PROBLEM
POSSIBLE CAUSE
Electrical Troubleshooting Chart Heat Pump
Troubleshooting Chart — Heating
REFRIGERANT SYSTEM DIAGNOSIS – HEATING
SYSTEM COOLS WHEN HEATING IS DESIRED
WIRING DIAGRAM
SCHEMATIC
MODELS
SCHEMATIC
WIRING DIAGRAM
MODELS
SQ06J10B-B, SQ06J10B-A, SQ08J10C-A, SQ08J10D-A
SCHEMATIC
WIRING DIAGRAM
MODELS
SEE DETAIL A
WIRING DIAGRAM
KQ08J10B-1, KQ08J10B-A, KQ08J10C-A
SCHEMATIC
SYSTEM SWITCH
SCHEMATIC
MODELS
WIRING DIAGRAM
PTCR WIRING DIAGRAM
SCHEMATIC
MODEL YQ06J10B-A
MODEL: SC06H10D
SS12J10AR-B, SS14J10R-A, SS12J30D-A, SS16J30A-A
SS08J10R-B, SS08J10R-A, SS09J10C-A, SS10J10AR-A
SS18J30R-A, SM20J30-A, SM24J30-A
SCHEMATIC
SCHEMATIC
WIRING DIAGRAM
MODELS SL28J30B-A, SL35J30-A, SL35J30-B
WIRING DIAGRAM
SCHEMATIC
MODELS
KS12J30B-A, KS18J30-A, KM20J30-A, KM24J30-A
WIRING DIAGRAM
SCHEMATIC
MODELS
WIRING DIAGRAM
YS12J33-A, YM18J34B-A, YL24J35C-A
SCHEMATIC
MODELS
YS09J10B-A
MODEL
WIRING DIAGRAM
SCHEMATIC
WIRING DIAGRAM
EQ08J11-A, EQ08J11-B
SCHEMATIC
MODELS
SCHEMATIC
WIRING DIAGRAM
MODELS
WS07A10E-B, WS07A10E-C, WS10A10-A, WS12A10E-A
WIRING DIAGRAM
WE09A33E-B, WE12A33E-A, WE15A33-A
SCHEMATIC
MODELS
WIRING DIAGRAM
WY09A33F-A, WY12A33G-A
SCHEMATIC
MODELS
Testing The Electronic Control
Checking Room Temperature
2001 XQ Boards & QME Boards
Post Office Box 1540 · San Antonio, Texas
FRIEDRICH AIR CONDITIONING CO
4200 N. Pan Am Expressway · San Antonio, Texas
Printed in the U.S.A
