Trane 4TWB3018-060 Installer'S Manual Download Page 27

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18-BC85D1-2

SYSTEM FAULTS

REFRIGERANT CIRCUIT

Head Pressure Too High

Head Pressure Too Low

Suction Pressure Too High

Suction Pressure Too Low

Liquid Refrig. Floodback (TXV/EEV)

Liquid Refrig. Floodback

(Cap. Tube)

I.D. Coil Frosting

Compressor Runs

Inadequate or No Cooling/Htg

ELECTRICAL

Compressor & O.D. Fan

Won’t Start
Compressor Will Not Start

But O.D. Fan Runs

O.D. Fan Won’t Start

Compressor Hums But Won’t Start

Compressor Cycles on IOL

I.D. Blower Won’t Start

DEFROST

Unit Won’t Initiate Defrost

Defrost Terminates on Time

Unit Icing Up

T T

K M

PLY

HIG

H V

OLT

E W

IRIN

N C

APA

CIT

STA

APA

CIT

STA

NTA

TAC

LTA

IRIN

L T

STA

NTA

OIL

LTA

K C

INE

ICIE

F. U

F. O

IVE

P. L

O.D

. A

IRF

O.D

. A

CIR

LAT

V/E

EAT

I.D

. A

IRF

F. C

IR.

RIC

TIO

V L

KIN

V C

OIL

TIV

K V

ALV

E L

KIN

T R

EF.

T C

EF.

C
H
C
H
C
H
C
H
C
H
C
H
C
H
C
H

C
H
C
H
C
H
C
H
C
H
C
H

C
H
C
H
C
H

P
P

P
P
P
P
P
P

P
P
P
P

S
S

S
S
S
S

S
S

S
S
S
S

S
S
S
S
S
S
S
S

S
S

P
P

S
S

P
P

S
S

P
P

P
P
P
P

P
P
P
P
P
P
P
P

S
S
S
S

S
S

P
P

S
S

S
S
S

S
S

S
S
S

S
S

P
P

S
S
S
S
S
S

S
S

P
P

S
S
S
S

S
S

S
S
P
P

S
S

P
P
P

P
P

S
S

P P

C - Cooling H - Heating P - Primary Causes S - Secondary Causes

- 3 Phase Only

15.2 Troubleshooting

Summary of Contents for 4TWB3018-060

Page 1: ...ed matched indoor and outdoor systems All of the manufacture s split systems are AHRI rated only with TXV EEV indoor systems Some of the benefits of installing approved matched indoor and out door spl...

Page 2: ...onent replacement For specific handling concerns with R 410A and POE oil reference Retrofit Bulletins SS APG006 EN and APP APG011 EN or APPAPG012 EN Extreme caution should be exercised when opening th...

Page 3: ...indoor unit should NOT exceed sixty 60 feet 2 The maximum vertical change should not exceed sixty 60 feet 3 Service valve connection diameters are shown in Table 5 1 Note For line lengths greater than...

Page 4: ...f top depending on local weather This additional height will allow drainage of snow and ice melted during defrost cycle prior to its refreezing Ensure that drain holes in unit base pan are not obstruc...

Page 5: ...g 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 structure The pad must be le...

Page 6: ...tion Important The Vapor Line must always be insulated DO NOT allow the Liquid Line and Vapor Line to come in direct metal to metal contact Vapor Line Liquid Line Insulation Determine required line le...

Page 7: ...e due to vibration transmission 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 Isolati...

Page 8: ...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 Lin...

Page 9: ...avoid heat damage and continue the dry nitrogen purge Braze the refrigerant lines to the service valves Continue the dry nitrogen purge Do not re move the wet rag until all brazing is completed Import...

Page 10: ...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 Leak...

Page 11: ...e 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 COUNTE...

Page 12: ...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 touches t...

Page 13: ...Comfort control must be dual fuel capable or use accessory TAYPLUS103A 2 Ylo and BK may not be present on unit 3 W1 X2 is a field installed jumper Variable Speed Furnace Hook up Diagram Red Yellow Gr...

Page 14: ...W2 Pink W3 Brown W1 White For multiple stages of electric heat jumper W1 W2 and W3 together if comfort control has only one stage of heat YI andYO connections must be made as shown for proper operatio...

Page 15: ...multiple stages of electric heat jumper W1 W2 and W3 together if comfort control has only one stage of heat Some models have a terminal strip Refer to air handler Installer s Guide Red Yellow Green W...

Page 16: ...White YI andYO connections must be made as shown Internally mounted condensate switch is optional and must be ordered separately If a 3rd party condensate overflow switch is installed it should be wir...

Page 17: ...speeds up all defrost board timings 3 FRC_DFT Forced Defrost Short TEST_COMMON to this pin for two 2 seconds to initiate a forced defrost Remove the short after defrost initiates Defrost Control Chec...

Page 18: ...Voltage Ground Ground the outdoor unit per national state and local code requirements LIVE ELECTRICAL COMPONENTS During installation testing servicing and troubleshooting of this product it may be ne...

Page 19: ...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 is u...

Page 20: ...t tempera ture is above 55 F For best results the indoor temperature should be kept between 70 F to 80 F Section 14 System Charge Adjustment 14 1 Temperature Measurements 14 2 Subcooling Charging in C...

Page 21: ...NGTH FEET REFRIGERANT LINE LIFT FEET 10 20 25 30 40 60 Add 4 of Subcooling Add 3 of Subcooling Add 2 of Subcooling Add 1 of Subcooling Use Design Subcool Value 60 50 40 30 25 20 15 10 0 SUBCOOL CHARGI...

Page 22: ...201 204 208 211 215 211 215 218 222 225 229 232 229 232 236 240 243 247 251 247 251 255 259 263 267 271 267 271 275 279 283 287 291 287 291 296 300 304 309 313 309 313 318 322 327 331 336 331 336 341...

Page 23: ...5 70 415 420 370 385 380 60 375 380 335 345 345 80 430 435 390 395 395 70 390 390 350 360 355 60 350 355 315 325 320 80 415 420 375 380 380 70 370 375 335 345 340 60 335 335 295 305 305 80 390 390 355...

Page 24: ...value represents the amount of refrigerant shipped in the outdoor unit and is compatible with 15 feet of AHRI rated refrigerant lines and the smallest AHRI rated coil Using Table 14 3 find the charge...

Page 25: ...ained with the namplate charge plus additional charge previously added STEP 5 Return to site for adjustment Important Return in the spring or summer to accurately charge the system in the cooling mode...

Page 26: ...inst the following list Final phases of this installation are the unit Operational and Checkout Procedures To obtain proper performance all units must be operated and charge adjustments made Important...

Page 27: ...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 C...

Page 28: ...cturer has a policy of continuous product and product data improvement and it reserves the right to change design and specifications without notice Representative only illustrations included in this d...

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