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Service Instructions
This manual is to be used by qualified, professionally trained HVAC technicians only. The
manufacturer does not assume any responsibility for property damage or personal injury due
to improper service procedures or services performed by an unqualified person.
Copyright © 2015, 2017
CONDENSING UNIT
CONDENSING UNIT
CONDENSING UNIT
CONDENSING UNIT
CONDENSING UNIT
MODELS
MODELS
MODELS
MODELS
MODELS
RR20AVAK(9)/DX16SA0181XM
RR20AVAK(9)/DX16SA0181XM
RR20AVAK(9)/DX16SA0181XM
RR20AVAK(9)/DX16SA0181XM
RR20AVAK(9)/DX16SA0181XM
RR25AVAK(9)/DX16SA0241XM
RR25AVAK(9)/DX16SA0241XM
RR25AVAK(9)/DX16SA0241XM
RR25AVAK(9)/DX16SA0241XM
RR25AVAK(9)/DX16SA0241XM
RR30AVAK(9)/DX16SA0301XM
RR30AVAK(9)/DX16SA0301XM
RR30AVAK(9)/DX16SA0301XM
RR30AVAK(9)/DX16SA0301XM
RR30AVAK(9)/DX16SA0301XM
RR36AVAK(9)/DX16SA0361XM
RR36AVAK(9)/DX16SA0361XM
RR36AVAK(9)/DX16SA0361XM
RR36AVAK(9)/DX16SA0361XM
RR36AVAK(9)/DX16SA0361XM
RR42AVAK(9)/DX16SA0421XM
RR42AVAK(9)/DX16SA0421XM
RR42AVAK(9)/DX16SA0421XM
RR42AVAK(9)/DX16SA0421XM
RR42AVAK(9)/DX16SA0421XM
RSDX6140000R1
APRIL 2017
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Summary of Contents for Daikin RR20AVAK/DX160181XM/AA
- Page 1 Service Instructions CONDENSING UNIT CONDENSING UNIT CONDENSING UNIT CONDENSING UNIT CONDENSING UNIT MODELS MODELS MODELS MODELS MODELS RR20AVAK(9)/DX16SA0181XM RR20AVAK(9)/DX16SA0181XM RR20AVAK(9)/DX16SA0181XM RR20AVAK(9)/DX16SA0181XM RR20AVAK(9)/DX16SA0181XM RR25AVAK(9)/DX16SA0241XM RR25AVAK(9)/DX16SA0241XM RR25AVAK(9)/DX16SA0241XM RR25AVAK(9)/DX16SA0241XM RR25AVAK(9)/DX16SA0241XM RR30AVAK(9)/DX16SA0301XM RR30AVAK(9)/DX16SA0301XM RR30AVAK(9)/DX16SA0301XM RR30AVAK(9)/DX16SA0301XM RR30AVAK(9)/DX16SA0301XM RR36AVAK(9)/DX16SA0361XM RR36AVAK(9)/DX16SA0361XM RR36AVAK(9)/DX16SA0361XM RR36AVAK(9)/DX16SA0361XM RR36AVAK(9)/DX16SA0361XM RR42AVAK(9)/DX16SA0421XM RR42AVAK(9)/DX16SA0421XM RR42AVAK(9)/DX16SA0421XM RR42AVAK(9)/DX16SA0421XM RR42AVAK(9)/DX16SA0421XM This manual is to be used by qualified, professionally trained HVAC technicians only.
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Page 2: Table Of Contents
Table of Contents IMPORTANT INFORMATION ........... 2 PRODUCT IDENTIFICATION - MODEL TREES ..... 5 PRODUCT DESIGN ..............7 SYSTEM OPERATION ............. 9 TROUBLESHOOTING CHART ..........10 SERVICING ................11... -
Page 3: Important Information
To locate an authorized servicer, please consult your telephone book or the dealer from whom you purchased this product. For further assistance, please contact: Daikin Air Conditioning Saudi Arabia LLC P.O. Box 14949, Riyadh 11434, Saudi Arabia Kind Abdullaziz St. - Alsahafa Area... - Page 4 IMPORTANT INFORMATION SAFE REFRIGERANT HANDLING While these items will not cover every conceivable situation, they should serve as a useful guide. WARNING WARNING EFRIGERANTS ARE HEAVIER THAN AIR. HEY CAN "PUSH OUT" THE O AVOID POSSIBLE EXPLOSION: OXYGEN IN YOUR LUNGS OR IN ANY ENCLOSED SPACE. O AVOID •...
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Page 5: Product Identification - Model Trees
PRODUCT IDENTIFICATION D X 16 S A 036 3 XM A A 7,8,9 11,12 Brand D - Daikin Engineering* Minor Revision Type X AC R-410A HP R-410A Engineering * SEER Major Revision 13 - 13 SEER * Neither revision is used for order entry... - Page 6 RR**AVAK/DX16SA***XM Daikin Brand 16 SEER R410A Split System Model/Rev Description RR20AVAK/DX160181XM/AA RR25AVAK/DX160241XM/AA RR30AVAK/DX160301XM/AA Initial release of DAIKIN Brand 16 SEER, R410A Condensers RR36AVAK/DX160361XM/AA RR42AVAK/DX160421XM/AA RR20AVAK/DX160181XM/AB RR25AVAK/DX160241XM/AB The base valve has been modified to include a factory installed flowrator. RR30AVAK/DX160301XM/AB This new assembly replaced the flowrator and piston kit.
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Page 7: Product Design
PRODUCT DESIGN This section gives a basic description of cooling unit opera- Some design characteristics of the Compliant Scroll com- tion, its various components and their basic operation. pressor are: Ensure your system is properly sized for heat gain and loss •... - Page 8 PRODUCT DESIGN The compressor increases the pressure of the gas, thus adding more heat, and discharges hot, high pressure super- heated gas into the outdoor condenser coil. In the condenser coil, the hot refrigerant gas, being warmer than the outdoor air, first loses its superheat by heat trans- ferred from the gas through the tubes and fins of the coil.
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Page 9: System Operation
SYSTEM OPERATION COOLING CYCLE When the indoor unit calls for cool, the COMP (PURPLE) wire connected to power by the indoor unit. The outdoor relay closes, energizing the contactor of the outdoor unit which starts both the compressor and the outdoor fan. When the indoor is satisfied, it disconnects power to the COMP (PURPLE) and the outdoor unit shuts down. -
Page 10: Troubleshooting Chart
TROUBLESHOOTING CHART COOLING/HP ANALYSIS CHART System Unsatisfactory Com plaint No Cooling Operating Cooling/Heating Pressures POSSIBLE CAUSE Test Method DOTS IN ANALYSIS Remedy GUIDE INDICATE "POSSIBLE CAUSE" • Pow er Failure Test Voltage • • • Blow n Fuse Inspect Fuse Size & Type •... -
Page 11: Servicing
SERVICING TABLE OF CONTENTS S-100 REFRIGERATION REPAIR PRACTICE......16 CHECKING VOLTAGE ..........12 S-101 LEAK TESTING (NITROGEN OR NITRO-GEN- CHECKING WIRING ..........12 TRACED)................17 CHECKING TRANSFORMER AND CONTROL S-102 EVACUATION..............17 CIRCUIT ..............12 S-103 CHARGING..............18 CHECKING CONTACTOR AND/OR RELAYS ..13 S-104 CHECKING COMPRESSOR EFFICIENCY....19 CHECKING CONTACTOR CONTACTS .... -
Page 12: Checking Voltage
SERVICING S-1 CHECKING VOLTAGE S-2 CHECKING WIRING 1. Remove outer case, control panel cover, etc., from unit being tested. With power ON: HIGH VOLTAGE! Disconnect ALL power before servicing WARNING or installing. Multiple power sources may be present. Failure to do so may Line Voltage now present. -
Page 13: Checking Contactor And/Or Relays
SERVICING S-7 CHECKING CONTACTOR AND/OR RE- LAYS HIGH VOLTAGE! VOLT/OHM Disconnect ALL power before servicing METER or installing. Multiple power sources may be present. Failure to do so may cause property damage, personal injury or death. Ohmmeter for testing holding coil Voltmeter for testing contacts The compressor contactor and other relay holding coils are TESTING COMPRESSOR CONTACTOR... -
Page 14: Checking Capacitor
SERVICING S-15 CHECKING CAPACITOR WARNING CAPACITOR, RUN Discharge capacitor through a 20 to 30 OHM A run capacitor is wired across the auxiliary and main resistor before handling. windings of a single phase permanent split capacitor motor. The capacitors primary function is to reduce the line current while greatly improving the torque characteristics of a motor. -
Page 15: Checking Compressor
SERVICING S-17A RESISTANCE TEST NOTE: You can do this test with a multi-meter if you have a Capacitance meter on your multi-meter. Each compressor is equipped with an internal overload. 1. Remove the capacitor from the circuit. The line break internal overload senses both motor amperage and winding temperature. -
Page 16: S-17B Ground Test
SERVICING S-17B GROUND TEST If fuse, circuit breaker, ground fault protective device, etc., has tripped, this is a strong indication that an electrical HIGH VOLTAGE! problem exists and must be found and corrected. The circuit Disconnect ALL power before servicing protective device rating must be checked, and its maximum or installing. -
Page 17: S-101 Leak Testing (Nitrogen Or Nitro-Gen- Traced)
SERVICING WARNING HIGH VOLTAGE! To avoid possible explosion, the line from the Disconnect ALL power before servicing nitrogen cylinder must include a pressure regulator or installing. Multiple power sources and a pressure relief valve. The pressure relief valve may be present. Failure to do so may must be set to open at no more than 150 psig. -
Page 18: S-103 Charging
SERVICING form corrosive acids. These acids attack motor windings and parts, causing breakdown. The equipment required to thor- oughly evacuate the system is a high vacuum pump, capable LOW SIDE HIGH SIDE of producing a vacuum equivalent to 250 microns or less and GAUGE GAUGE a vacuum gauge to give a true reading of the vacuum in the... -
Page 19: S-104 Checking Compressor Efficiency
SERVICING NOTE: R410A should be drawn out of the storage container 1. Purge gauge lines. Connect service gauge manifold to or drum in liquid form due to its fractionation properties, but base-valve service ports. Run the system in low stage at least should be “Flashed”... -
Page 20: S-106 Overfeeding
SERVICING S-106 OVERFEEDING NOTE: An optional method is to locate the thermometer at the suction line service valve. Ensure the thermometer Overfeeding by the expansion valve results in high suction makes adequate contact and is insulated for best pressure, cold suction line, and possible liquid slugging of the possible readings. -
Page 21: S-110 Checking Expansion Valve Operation
SERVICING There are other causes for high head pressure which may be Subcooling Formula = Sat. Liquid Temp. - Liquid Line found in the "Service Problem Analysis Guide." Temp. If other causes check out normal, an overcharge or a system EXAMPLE: containing non-condensables would be indicated. -
Page 22: S-120 Refrigerant Piping
NOTE: The Flushing Method using R-11 refrigerant is no possible, as adding oil traps to the refrigerant lines also longer approved by Daikin. increases the opportunity for debris and moisture to be introduced into the system. Avoid long running traps in Suction Line Drier Clean-Up Method horizontal suction line. - Page 23 SERVICING Pressure vs. Temperature Chart R-410A PSIG °F PSIG °F PSIG °F PSIG °F PSIG °F PSIG °F -37.7 114.0 37.8 216.0 74.3 318.0 100.2 420.0 120.7 522.0 137.6 -34.7 116.0 38.7 218.0 74.9 320.0 100.7 422.0 121.0 524.0 137.9 -32.0 39.5 75.5...
- Page 24 SERVICING REQUIRED LIQUID LINE TEMPERATURE LIQUID PRESSURE REQUIRED SUBCOOLING TEMPERATURE (°F) AT SERVICE VALVE (PSIG)
- Page 25 SERVICING RR**AVAK Wiring Diagram Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.
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