Friedrich racservmn service manual System Control Panel YQ Model Only

Page 18

Figure 13

 

L1

 

System Control Switch

 

 

 

(EQ Models)

B1

 

 

MS

L2

H C

LO2

SYSTEM CONTROL PANEL ("YQ" Model Only)

(See Figure 14)

The YQ Model unit uses a six position control switch to regulate the operation of the unit. Function of each position (Clockwise rotation) is as follows:

1."Off" - Turns everything off.

2."Fan Only" - To circulate filtered room air, but no cooling or heating.

3."Hi Cool" - Fan runs continuously, compressor goes on and off to maintain the selected room temperature.

4."Lo Cool" - Fan runs continuously, compressor goes on and off to maintain the selected room temperature.

5."Lo Heat" - Fan Runs continuously, heating turns on and off to maintain the selected room temperature.

6."Hi Heat" - Fan Runs continuously, heating turns on and off to maintain the selected room temperature.

Figure 14

System Control Panel (YQ Model Only)

SYSTEM CONTROL SWITCH - TEST (See Figure 15) Turn knob to phase of switch to be tested. There must be continuity as follows:

1."Fan Only" Position - between terminals "C" and "1".

2."Hi Cool" Position - between terminals "C" and "1", "C" and "3".

3."Lo Cool" Position - between terminals "C" and "2", and "C" and "3".

4."Lo Heat" Position - between terminals "C" and "2", and "C" and "4".

5."Hi Heat" Position - between terminals "C" and "1", and "C" and "4".

ROTARY (SYSTEM) SWITCH: "SC" Model (See Figure 16) A rotary four position switch is used to turn on the unit and select the operation desired. Switch selection is as follows:

Figure 15

System Control Switch

(YQ Model Only)

Figure 16

System Control Panel (SC Model Only)

1."Hi Cool" Turns on the compressor and fan at high speed

2."Lo Cool" Turns on the compressor and fan at low speed.

3."Fan Only" Turns on the fan at high speed.

4."Off" Turns everything off.

The switching arrangement of the control is as follows: (See Figure 17)

1."Off" All contacts open.

2."Hi Fan Contacts closed between terminals "L1" and "1".

3."Hi Cool" Contacts closed between terminals "L1" to "1" and "L1" and "C".

4."Lo-Cool" Contacts are closed between terminals "L1" to "2" and "L1 to "C".

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Contents 2003 Table of Contents 1st Digit Function RAC Serial Number Identification Guide00001 Page Data Evaporator AIR Operating Electrical Breaker Pressures Ratings Refrig Fuse Performance Evaporator AIR Operating Electrical Breaker Data SS10J10AR-A TEMP. DEG. F Pressures Ratings Heating SC06H10EWY09A33F-A WY12A33F-A Heating BtuhAmps Refrigeration System Sequence of Operation Breaker Wire SizeFuse/Circuit GroundingThermal Overload External Winding TestChecking Compressor Efficiency Checking the Internal Overload Terminal Overload TestTerminal Overload Internal FAN MotorResistor System Control Panel KQ Models Only- See Figure System Control PanelEQ Model Only See Figure System Control Panel YQ Model Only System Control Switch WE & WY Models See Figure System Control Switch TestSystem Control Switch KS, SS, KM, SM, SL Models See Figure System Control Panel See FigureSystem Control Switch Heat Pump & Electric Heat Models See FigureTo Adjust FAN Speed To SET Mode of OperationTo Adjust Temperature Smart Center Electronic Control CenterTesting the Electronic Control Error Code Listings To SET the TimerTesting the Electronic Control To SET Hour ClockThermostat YQ Model Only See Figure TestThermostat SQ & KQ Models See Figure Thermostat Models ES, YS, EM, YM, EL, YL See FigureThermostat Adjustment Defrost Thermostat Heat Pump Models OnlyThermostat Bulb Location Defrost Bulb Location Heat Pump Models Only CAPACITOR, RUN See FigureCapacitor Test Check Valve Operation Heat Pumps Reversing Valve See FigureTesting Reversing Valve Solenoid Coil Heat Pump Models Only See FigureTo Test Sealed Refrigeration System Repairs VALVE, Drain PAN See FigureHeating Element See Figure Equipment RequiredRotary Compressor Special Troubleshooting and Service Hermetic Component ReplacementSpecial Procedure in the Case Compressor Motor Burnout Equipment Must be CapableUndercharged Refrigerant Systems Method of ChargingOvercharged Refrigerant Systems Restricted Refrigerant System Routine Maintenance Troubleshooting Touch Test Chart To Service Reversing Valves Troubleshooting Cooling Problem To CorrectProblem Possible Cause To Correct Cycles Problem Possible Cause To Correct Troubleshooting Heating Heat pumps Problem Possible Cause To Correct Off and the electric element is energized Troubleshooting Heating Cooling/Electric Models Troubleshooting Chart Cooling System Cools When Heating is Desired YESModels SQ06J10B-B, SQ06J10B-A, SQ08J10C-A, SQ08J10D-A Models KQ08J10B-1, KQ08J10B-A, KQ08J10C-A Schematic Model YQ06J10B-AModel SC06H10D 619-405-06 SL28J30B-A, SL35J30-A, SL35J30-B AlternateConductor Or Brown RED Blue To Capacitor Bracket Wiring Diagram YS12J33-A, YM18J34B-A, YL24J35C-A Model EQ08J11-A, EQ08J11-B IDT Ovld Neutral WE09A33E-B, WE12A33E-A, WE15A33-A WY09A33F-A, WY12A33G-A Testing The Electronic Control XQ Boards & QME Boards Checking Room TemperatureFriedrich AIR Conditioning CO

racservmn specifications

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In summary, Friedrich Racervmn is a leader in precision engineering, recognized for its advanced technologies, innovative manufacturing processes, commitment to sustainability, and outstanding customer service. The company’s focus on quality and innovation positions it as a vital player in the modern industrial landscape, continuously pushing the envelope toward a more technologically advanced and environmentally conscious future.
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