Friedrich Kuhl SQ05N10 Series Service Manual Download Page 24 | Manualshive

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COMPONENTS TESTING (CON’T)

Testing the Relay Board

LN

L1

Fuse
T 3.15AH 250 Volts AC

Indoor Coil
Thermistor

Test for 3.3VDC. If incorrect or
no voltage, replace electronic
relay board. If voltage OK,
check thermistor’s resistance
value (See page 56).

Outdoor Coil
Thermistor

Test here for 5VDC. If no
voltage or wrong voltage,
replace relay board.

Heat Relay
For Heat & Cool Units
Goes Here

Fan
High Speed

Fan
Med Speed

Fan
Low Speed

+

-

23

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Summary of Contents for Kuhl SQ05N10 Series

Page 1: ...ric Heat Service Parts Manual 2 0 1 2 Room Air Conditioners KuhlQ_Serv Parts Man 4 12 Last character may vary PM FAN SPEED SCHEDULE SYSTEM FAN MODE POWER ROOM TEMP SET POINT AM F AUTO FAN CONTINUOUS A...

Page 2: ...of Operation 26 R 410A Sealed System Repair Considerations 27 Sealed Refrigeration System Repairs 28 33 Compressor Checks 34 35 Compressor Replacement 36 37 Available Accessories 37 Standard Filter Cl...

Page 3: ...LVWDQW LI SRVVLEOH Capacitors even when disconnected from the electrical power source retain an electrical charge potential capable of causing electric shock or electrocution Handle discharge and test...

Page 4: ...t skin Direct contact with liquid refrigerant can result in minor WR PRGHUDWH LQMXU H H WUHPHO FDUHIXO ZKHQ XVLQJ DQ R DFHW OHQH WRUFK LUHFW FRQWDFW ZLWK WKH WRUFK V DPH RU KRW surfaces can cause seri...

Page 5: ...ith each unit This service manual was written to assist the professional HVAC service technician to quickly and accurately diagnose and repair any malfunctions of this product 7KLV PDQXDO WKHUHIRUH ZL...

Page 6: ...2nd Digit Q Chassis Size 3rd and 4th Digit Approximate 78 5 LQ V RROLQJ Heating BTU Hr capacity listed in the 6SHFL FDWLRQ 3HUIRUPDQFH DWD 6HFWLRQ 7th Digit Options 0 Straight Cool 1 1 KW Heat Strip N...

Page 7: ...115 4 5 514 10 7 41 0 5 190 Q 65 71 71 75 78 84 84 88 06N10 5900 115 4 9 561 18 7 45 0 5 190 Q 08N10 7500 115 6 1 700 10 7 56 1 2 240 Q 10N10 9500 115 8 4 969 9 8 77 2 1 240 Q K hl Electric Heat EQ08N...

Page 8: ...size fuse circuit breaker Read electrical ratings on unit s rating plate Proper circuit protection is the responsibiity of the homeowner Grounding Unit MUST be grounded from branch circuit through ser...

Page 9: ...ordinances Under no circumstances should you remove the ground prong from the plug You must use the three prong plug furnished with the air conditioner Testthepowercord All Friedrich room air conditi...

Page 10: ...block Let s check out how to control your air conditioner On the control panel just above the POWER is a liquid crystal display LCD All of the control panel function buttons and mode icons can be view...

Page 11: ...temperature temporarily to 85 F during the hours when most people are away at work lower them again to 78 F prior to the time when most people will return home and then raise slightly to 82 F to maint...

Page 12: ...he ow of air does not stop FAN SPEED The FAN SPEED button allows you to toggle between four modes of operation LOW MEDIUM HIGH and AUTO Press once and let go each time FRR095 3 Speed AUTO FAN MODE The...

Page 13: ...ily at the times that you select For example you can command the system to turn ON at 8 15 am and to turn OFF at 1 30 pm everyday To set the timer see pages 15 16 SCHEDULE The SCHEDULE has two options...

Page 14: ...5 seconds to save the setting Button inactivity for more than 15 seconds causes the display to time out and return to the normal operating display TIMER SCHEDULE SET POINT F AUTO FAN SET POINT F AUTO...

Page 15: ...c then let go The display shows the TIMER is selected Press the button once and let go SCHEDULE FRR138 TIMER OR SCHEDULE OPTIONS 1 OR 2 SELECTION C Residential Schedule When selection 1 is selected th...

Page 16: ...Figure 4 AM FRR128 FRR129 The unit s current hour displays Use the or buttons to adjust the hour To change from AM to PM continue to increment roll the display Press TIMER SET Refer to Figure 4 button...

Page 17: ...n OFF FRR146 Use the or button to adjust the minutes Press the TIMER SET button Figure 4 within 15 seconds to exit and save the setting The timer is now set to stop at 11 55 AM The display returns to...

Page 18: ...168 If the Timer function is turned OFF during the ON time The Timer icon turns off The control stays in the current state FRR169 The display shows a normal system SET POINT F AUTO FAN The display sho...

Page 19: ...ration In the AUTO FAN mode the fan only turns on and off when the compressor operates or the heat function is active NOTE AUTO FAN is not available in the FAN ONLY Mode the display indicates CONTINUO...

Page 20: ...STEM FAN MODE POWER DISPLAY FAN MODE POWER TEMPERATURE UP TEMPERATURE DOWN F AUTO FAN AUTO CONTINUOUS 88 C SYSTEM MODE FAN MODE FAN SPEED SCHEDULE ICON HEAT ICON FAN ONLY ICON F C ICONs FRR082 F AUTO...

Page 21: ...compressor After a 30 seconds delay the fan is shut off See figure below for graphic details Electric Heat Operation in Cool with Electric Heat Units When in the Heat mode with and without Fan Mode A...

Page 22: ...fan delay is disabled during Test Mode Heating Fan Delay This is only for fan Mode Auto Fan cycles with cool heat operation and not for continuous fan mode When unit cycles Heating ON starts the fan 5...

Page 23: ...Ensure it is in good condition 4 Using a voltmeter check for 5VDC at plug see Image 2 and 3 5 For room temperature thermistor s voltage test see Image 2 User Interface Tests Relay Board Test Check he...

Page 24: ...or 3 3VDC If incorrect or no voltage replace electronic relay board If voltage OK check thermistor s resistance value See page 56 Outdoor Coil Thermistor Test here for 5VDC If no voltage or wrong volt...

Page 25: ...possibility of capacitor failure LV PXFK JUHDWHU ZKHQ WKH LGHQWL HG WHUPLQDO LV FRQQHFWHG WR WKH 6 RU VWDUW WHUPLQDO 7KH LGHQWL HG WHUPLQDO VKRXOG always be connected to the supply line or R terminal...

Page 26: ...have been removed A cold resistance reading of approximately 10 11 ohms for the 1 15 KW heater should be registered Figure Heating Element DRAIN PAN VALVE During the cooling mode of operation condens...

Page 27: ...ed to a Liquid before leaving the condenser coil The refrigerant leaves the condenser Coil through the liquid line as a warm high pressure liquid It next will pass through the refrigerant drier if so...

Page 28: ...R 410A equipment To prevent moisture absorption and lubricant contamination do not leave the refrigeration system open to the atmosphere longer than 1 hour Weigh in the refrigerant charge into the hi...

Page 29: ...r overload failure SealedRefrigerationSystemcontainsrefrigerant and oil under high pressure Proper safety procedures must be followed and proper protective clothing must be worn when working with refr...

Page 30: ...ged to a Liquid before leaving the condenser coil The refrigerant leaves the condenser Coil through the liquid line as a warm high pressure liquid It next will pass through the refrigerant drier if so...

Page 31: ...r overload failure SealedRefrigerationSystemcontainsrefrigerant and oil under high pressure Proper safety procedures must be followed and proper protective clothing must be worn when working with refr...

Page 32: ...FREEZE HAZARD Proper safety procedures must be followed and proper protective clothing must be worn when working with a torch Failure to follow these procedures could UHVXOW LQ PRGHUDWH RU VHULRXV LQ...

Page 33: ...evaporator will not be encountered because the refrigerant will boil later if at all Gauges connected to system will usually have higher head pressure depending upon amount of over charge Suction pre...

Page 34: ...h a partial restriction there may be gurgling sounds at the metering device entrance to the evaporator The evaporator in a partial restriction could be partially frosted or have an ice ball close to t...

Page 35: ...R A Test NOTE RQVXOW WKH VSHFL FDWLRQ DQG SHUIRUPDQFH VHFWLRQ for running amperage The L R A can also be found on the rating plate Select the proper amperage scale and clamp the meter probe around the...

Page 36: ...n point of contact as a good connection is a must and the other probe in turn to each compressor terminal If a reading is obtained the compressor is grounded and must be replaced Check the complete el...

Page 37: ...system will need to be cleaned up following proper procedures 7 Install the replacement compressor 8 Pressurize with a combination of R410 A and nitrogen and leak test all connections with an electron...

Page 38: ...ized Reassemble the system including new drier strainer and capillary tube Proceed with step 8 10 on previous page SPECIAL PROCEDURE IN THE CASE OF MOTOR COMPRESSOR BURNOUT Basically troubleshooting a...

Page 39: ...low the Instructions on the inside of the front door Figure 2 Figure 3 FRR075 FILTER DOOR FRR076 FILTER FRAME INSTRUCTIONS FILTER DOOR How to Remove the Front Cover Unplugunit STEP 1 s w e r c s 4 e h...

Page 40: ...reinstalling them ELECTRONIC ELECTRICAL MECHANICAL Periodically at least yearly or bi yearly inspect all control components electronic electrical and mechanical as well as the power supply Use proper...

Page 41: ...Inspect the surrounding area inside and outside to ensure that the unit s clearances have not been compromised or altered ROUTINE MAINTENANCE Continued Do not drill holes in the bottom of the drain pa...

Page 42: ...is recommended Present the owner or operator of the equipment with the Installation Operation Manual all accessory installation instructions and the name address and telephone number of the Authorize...

Page 43: ...42...

Page 44: ...scroll through any system errors Only active errors will be shown The display error mode will time out in 15 seconds with no key activity Press the key to view the next error Press the SELECT key to...

Page 45: ...eeze Protection Only used if Electric Heat is available Run High Speed and Electric heat until room temp reaches 46 F Display FRZ during operation Logged Only 11 WallStat Problem or Connection Issue U...

Page 46: ...seconds and the display will then revert to the normal display The test mode will time out after 1 hour To cancel test mode unplug and replug the power cord Normal display This function is used to te...

Page 47: ...46...

Page 48: ...47...

Page 49: ...COOLING ONLY ROOM AIR CONDITIONERS TROUBLESHOOTING TIPS 48...

Page 50: ...COOLING ONLY ROOM AIR CONDITIONERS TROUBLESHOOTING TIPS...

Page 51: ...COOLING ONLY ROOM AIR CONDITIONERS TROUBLESHOOTING TIPS 50...

Page 52: ...COOLING ONLY ROOM AIR CONDITIONERS TROUBLESHOOTING TIPS 51...

Page 53: ...HEAT COOL ONLY ROOM AIR CONDITIONERS TROUBLESHOOTING TIPS NOTE Heater size on the EQ08M11 is 1 15 KW 52...

Page 54: ...ELECTRONIC CONTROLS COOL ONLY SQ05N10 A SQ06N10 A SQ08N10 A SQ10N10 A 53...

Page 55: ...CAP OLP MTR COMPR HEATER LIMIT FUSE HL THERMISTER T COMBINATION TERMINAL INSULATOR GROUNDED LEAD SYMBOL ELECTRIC HEAT HL HTR TF 5 F A N BLACK S C R FAN MOTOR H E R M C COMPRESSOR TO INNER WALL MOTOR...

Page 56: ...11 5199 71 11 2879 72 11 0611 73 10 8392 74 10 6223 75 10 4103 76 10 2029 77 10 0000 78 9 7965 79 9 5977 80 9 4033 TEMP F RESISTENCE K Ohms 81 9 2133 82 9 0275 83 8 8459 84 8 6683 85 8 4947 86 8 3250...

Page 57: ...56...

Page 58: ...57...

Page 59: ...e unit capacity line intersect read down to the outdoor ambient temperature scale and nd that this unit will deliver the required BTU Hr capacity to approximately 30 F The heat load form on the follow...

Page 60: ...2 f o o R p u t l i u B 0 2 0 x t F q S d e t a l u s n i 2 1 f o o R p u t l i u B No Insulation Sq Ft x 0 33 FLOOR Area Sq Ft Above Vented Crawl space Insulated 1 Sq Ft x 0 20 Uninsulated Sq Ft x 0...

Page 61: ...K hl Q Chassis 2012 Parts List 4 5 10 2 8 12 14 17 20 7 24 23 3 6 22 1 19 25 26 15 16 13 11 9 21 18 K hl Q CHASSIS UNIT EXPLODED DIAGRAM 60...

Page 62: ...30 31 32 32 29 28 33 27 K hl Q Units 2012 Parts List 61...

Page 63: ...1 1 1 20 61597317 INNERWALL XQ 1 1 1 1 20 61597318 INNERWALL EQ 1 21 61776903 FAN MOTOR BRACKET 1 1 21 61776900 FAN MOTOR BRACKET 1 1 1 22 61619517 COVER TOP Q CHASSIS VENTED 1 1 1 1 1 23 91400402 COM...

Page 64: ...t 62 Set Point Heat 62 Set Point Heat 62 Start Time 800 Start Time 800 Start Time 800 Start Time 800 Start Time 800 Start Time 800 Start Time 800 System Mode Cool System Mode Cool System Mode Cool Sys...

Page 65: ...roducts which have defects or damage which results from improper installation wiring electrical current characteristics or installed in a corrosive atmosphere default or delay in performance caused by...

Page 66: ...Woodside New York 11377 718 545 5464 800 431 1143 International Parts Depot Traco Corp 380 Paterson Road Carlstadt NJ 07072 201 939 1600 Reeve Air Conditioning Inc 2501 South Park Road Hallandale Flor...

Page 67: ...KuhlQ Serv PartsMan 5 12 FRIEDRICH AIR CONDITIONING CO 10001 Reunion Place Ste 500 San Antonio TX 78216 P 210 546 0500 F 210 546 0731 www friedrich com Printed in the U S A...

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