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88-A4AC3001-1G-EN

Is contactor

energized?

(contacts closed)

Is voltage

present at

contactor coil?

Replace contactor

YES

Check for 24 volts AC

across contactor coil

Check control

transformer and

control fuse

Is the control

transformer

and fuse good?

YES

Repair or replace

transformer or fuse.

Investigate cause for

failure (possible short in

field wiring)

Jumper R to Y low

voltage terminals

at thermostat sub

base.

Does the

contactor

energize?

Repair or replace

connecting wiring

YES

Go To:

Compressor won’t run

Replace the room

thermostat

YES

Compressor fails to start

Contactor check

OUT

Single Pole Contactor (MS)*

Double Pole Contactor (MS)*

Contactor Coil

24 VAC

HIGH

VOLTAGE

OUT

HIGH

VOLTAGE

*Refer to Wiring Diagram to determine if a single pole or double pole contactor is used.

TROUBLESHOOTING

15.2 Troubleshooting

Содержание A4AC3018B1000B

Страница 1: ...djusted or altered equipment by an unqualified person could result in death or serious injury When working on the equipment observe all pre cautions in the literature and on the tags stickers and labe...

Страница 2: ...d Failure to use proper service tools may result in equipment damage or personal injury SERVICE USE ONLY R 410A REFRIGERANT AND AP PROVED POE COMPRESSOR OIL WARNING WARNING LIVE ELECTRICAL COMPONENTS...

Страница 3: ...nt Line Routing 9 Section 7 Refrigerant Line Brazing 10 Section 8 Refrigerant Line Leak Check 12 Section 9 Evacuation 13 Section 10 Service Valves 13 Section 11 Electrical Low Voltage 14 Section 12 El...

Страница 4: ...vertical change should not exceed 50 feet 3 Standard and alternate line sizes and service valve connection sizes are shown in Table 5 1 See Table 5 1 for exceptions for certain tonnages Note For other...

Страница 5: ...n areas where snow accumulation and prolonged below freezing temperatures occur Units should be elevated 3 12 inches above the pad or roof top depending on local weather This additional height will al...

Страница 6: ...Installation When installing the unit on a support pad such as a concrete slab consider the following The pad should be at least 1 larger than the unit on all sides The pad must be separate from any s...

Страница 7: ...ft Max Lift ft A4AC3018B 3 4 3 8 3 4 3 8 150 50 A4AC3023A 3 4 3 8 3 4 3 8 150 50 A4AC3024A 3 4 3 8 3 4 3 8 150 50 A4AC3029A 3 4 3 8 3 4 3 8 150 50 A4AC3030A 3 4 3 8 3 4 3 8 150 50 A4AC3036A 3 4 3 8 3...

Страница 8: ...ulation Determine required line length and lift You will need this later in STEP 2 of Section 14 Total Line Length __________ Ft Total Vertical Change lift __________ Ft The outdoor condensing units a...

Страница 9: ...from the refrigerant lines For Example When the refrigerant lines have to be fastened to floor joists or other framing in a structure use isolation type hangers Isolation hangers should also be used w...

Страница 10: ...re or other appropriate method every 8 ft 8 Feet Maximum Isolation Through Wall DO NOT hang line sets from ductwork Sealant Insulation Vapor Line Wall Ductwork Isolator Line Set Section 7 Refrigerant...

Страница 11: ...the service valves Continue the dry nitrogen purge Do not remove the wet rag until all brazing is completed Important Remove the wet rag before stopping the dry nitrogen purge Note Install drier in L...

Страница 12: ...P 2 Check for leaks by using a soapy solu tion or bubbles at each brazed location Remove nitrogren pressure and repair any leaks before continuing Section 8 Refrigerant Line Leak Check 8 1 Check For L...

Страница 13: ...lete blank off the vacuum pump and micron gauge and close the valves on the manifold gauge set 1 MIN Section 10 Service Valves 10 1 Open the Gas Service Valve 0350 Microns ON OFF CAP 1 4 TURN ONLY COU...

Страница 14: ...lve System Service Port 3 16 Hex Wrench Unit Side of Service Valve Extreme caution should be exercised when opening the Liquid Line Service Valve Turn counterclockwise until the valve stem just touche...

Страница 15: ...rnace Furnace Outdoor Unit R G B W1 W2 B Y R G B C W1 W2 24 VAC HOT FAN 24 VAC Common COOL HEATING Y Y1 Y Y YLO Thermostat Outdoor Unit R G B W1 W2 B R G B C Y1 W1 W2 24 VAC HOT FAN 24 VAC Common COOL...

Страница 16: ...tion testing servicing and troubleshooting of this product it may be nec essary to work with live electrical components Failure to follow all electrical safety precau tions when exposed to live electr...

Страница 17: ...t s to apply power to the indoor and outdoor units STEP 5 Set system thermostat to ON OFF DONE CANCEL ON OFF STEP 4 Wait one 1 hour before starting the unit if compressor crankcase heater acces sory i...

Страница 18: ...STEP 1 Use the refrigerant line total length and lift measurements from Section 5 3 Total Line Length __________ Ft Vertical Change Lift __________ Ft Note Use this method when matched with a TXV or...

Страница 19: ...ORRECTIONS TABLE FOR LINE LENGTH AND RISE TOTAL REFRIGERANT LINE LENGTH FT includes lift Add 2 Add 1 3 Ton Units 50 4 40 30 25 Use Design Subcooling 15 1 10 0 20 30 40 50 60 70 80 90 100 110 120 130 1...

Страница 20: ...iquid Temperature row Table 14 2 8 9 10 11 12 13 14 179 182 185 188 191 195 198 195 198 201 204 208 211 215 211 215 218 222 225 229 232 229 232 236 240 243 247 251 247 251 255 259 263 267 271 267 271...

Страница 21: ...331 336 95 331 336 341 346 351 355 360 100 355 360 365 370 376 381 386 105 381 386 391 396 402 407 413 110 407 413 418 424 429 435 441 115 435 441 446 452 458 464 470 120 464 470 476 482 488 495 501 1...

Страница 22: ...25 27 28 30 31 95 4 6 8 10 13 14 16 18 20 22 23 25 26 28 29 100 6 8 10 12 13 16 18 20 21 23 25 27 29 105 4 6 7 9 11 13 15 18 20 22 24 26 28 110 4 7 9 11 13 16 18 21 23 26 28 115 6 9 12 14 16 19 21 24...

Страница 23: ...sured Suction Line Temp __________ F Liquid Gage Pressure __________ PSIG Suction Gage Pressure __________ PSIG Calculating Charge Using the Weigh In Method 1 Measure in feet the distance between the...

Страница 24: ...s are tight 6 Observe outdoor fan during on cycle for clearance and smooth operation Section 15 Checkout Procedures and Troubleshooting 15 1 Operational And Checkout Procedures CHECKOUT PROCEDURE Afte...

Страница 25: ...re possible short in field wiring Jumper R to Y low voltage terminals at thermostat sub base Does the contactor energize NO Repair or replace connecting wiring YES Go To Compressor won t run Replace t...

Страница 26: ...or NO Check for locked rotor Is voltage present at C to S and C to R with locked rotor amps on C YES Check Start Capacitor and Relay if present and Run Capacitor Do the start components and run capaci...

Страница 27: ...A C T O R C O I L L O W V O L T A G E F U S E S T U C K C O M P R E S S O R I N E F F I C I E N T C O M P R E F U N D E R C H A R G E R E F O V E R C H A R G E E X C E S S I V E E V A P L O A D N O N...

Страница 28: ...28 88 A4AC3001 1G EN Section 16 Refrigerant Circuits 1 5 Ton Units Accumulator 2 Ton Units PRINTED FROM D157394P02 REV A...

Страница 29: ...88 A4AC3001 1G EN 29 2 5 Ton Units Accumulator 3 Ton Units PRINTED FROM D158796P01 REV A...

Страница 30: ...30 88 A4AC3001 1G EN 4 Ton Units PRINTED FROM D158514P01 3 5 Ton Units PRINTED FROM D157394P01...

Страница 31: ...88 A4AC3001 1G EN 31 5 Ton Units PRINTED FROM C151867...

Страница 32: ...com The AHRI Certified mark indicates company participation in the AHRI Certification program For verification of individual certified products go to ahridirectory org The manufacturer has a policy of...

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