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