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73TCA005151B

Carrier 73TCA005111B, 73TCA005121B, 73TCA005141B, 73TCA005151B, 73TCA005171B Start-up And Service Instructions

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1993-1995 Room Air Conditioners
Start-Up and Service Instructions
73TC
CONTENTS
Page
SAFETY REMINDERS .........................1
START-UP ....................................1
SERVICE ....................................1,2
General Notes ................................1
Compressor Replacement .....................2
PREVENTIVE MAINTENANCE ................2-4
General ......................................2
DISASSEMBLY INFORMATION ...............5-8
Filter Removal ................................5
Discharge Air Deck Removal ..................5
Thermostat Bulb Heater Removal
(008P Unit Only) ............................6
Mode Selector Switch Removal ................6
Fan Cycle Switch (Energy Saver Switch)
Removal (008P Unit Only) ...................6
Accessing Compressor, Fan Motor, Outdoor
Coil Sections ...............................7
Exhaust Feature (008P Unit Only) ..............7
Fan Motor Removal ...........................7
• OUTDOOR FAN
• INDOOR BLOWER WHEEL
SERVICE POINTS .............................9
TROUBLESHOOTING ........................10
SAFETY REMINDERS
1. Carry a fire extinguisher in your truck. Keep it within reach
when using a torch. Check fire extinguisher periodically to be sure it is fully loaded and functional.
2. Know how to handle oxyacetylene equipment safely. Lock
the equipment in an upright position in the truck and at the job site.
tem for leak checking. Always use a good regulator. Be careful not to exceed 150 psig test pressure in the her­metic compressor.
4. Wear safety goggles and gloves when recovering refrig-
erant from a system.
5. Attend shop safety meetings.
START-UP
Refer to operating instructions in Owner ’s Guide pro­vided with room air conditioner. Refer to Table 1 for specific model number information to properly service,maintain,and disassemble the unit.
SERVICE
General Notes —
tions are provided to assist the trained and qualified service technician in repairing or replacing components of Carrier room air conditioner model offerings for 1993-1995. Room air-conditioning models are cooling-only units. These in­structions contain disassembly photos for Model 73TC (Siestat I and Siesta II). A typical 73TC unit is shown in Fig. 1. Unit physical data is found in Tables 2-8.
IMPORTANT: Repairing and servicing air condition­ers can be hazardousfor untrained individuals. The in­structions printed in this publication are for properly trained and qualified Carrier service technicians only.
Before working on any air conditioner, be sure to first disconnect all electric power to theunit to avoid the pos­sibility of electrical shock and personal injury.
Before disconnecting, discharge capacitors by shorting ca­pacitors across terminals.
Shield coils with cardboard to protect hands against in­jury from sharp metal edgeswhen removing compressor and other components.
When disassembling wiring, use numbered stickers to iden­tify wire leads and terminals. This aids in quick, accurate reassembly.
These Start-Up and Service Instruc-
C
O
O
L
E
R
Fig. 1 — Model 008P
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1 4 Tab 8a 10a
PC 131 Catalog No. 537-327 Printed in U.S.A. Form 73TC-1SS Pg 1 1-96 Replaces: New
Table 1 — Model Number Nomenclature
Check clearances around scroll and housing before in­stalling fans. Before securing fan(s) fasteners, rotate fan by hand to ensure ample clearance.
Refer to Carrier Standard Service Techniques, Chapters 1 and 2, for information on checking motors; removing refrigerant; adding oil; and evacuating, dehydrating, and charg­ing system. Pay particular attention to all safety warnings for these procedures.
NOTE: In Carrier Standard Service Techniques, refrigerant removal must always include recovering the refrigerant, not allowing it to escape to the atmosphere.
Compressor Replacement
Stand clear of compressor terminals when working on compressors. With system under pressure, terminals may blow causing personal injury.
Observe the same safety procedures for rotary compres­sors as for reciprocating compressors.
When changing compressors:
1. Follow all safety codes. Reminder: use protective goggles, work gloves, and water-soaked quenching cloth.
2. Shut off all electrical power to unit by removing power cord from outlet, then disconnect all wiring from the compressor.
3. Apply field-supplied tap-a-lines to the true (closest to compressor) suction and discharge connections of the compressor.
4. Recover the refrigerant charge from the unit. After re­covering, cut the discharge and suction line process tubes below the tube crimps. If you choose a good tubing location for cutting the refrigerant lines initially, the lo­cation is easily accessible when making the final joints. You can braze the oil piping stub into the new compres­sor fittings more easily before the compressor is put back into the unit.
Oil vapor in piping stubs canignite from torch flame and cause serious injury. Exercise extreme care when brazing, and keep brazing cloth and fire extin­guisher handy for emergency use.
5. Connect a nitrogen supply to the unit at one of the tap­a-line connectors (5 psig maximum flow), leaving the other connector opentotheatmosphere.Brazeanglevalves with stubs to each process tube.
6. Remove compressor from unit. Refer to Accessing Com­pressor, Fan Motor, Outdoor Coil Sections, page 7.
7. Removetap-a-linesfromsuctionanddischargelines.Care­fully braze the holes closed from where the tap-a-lines were removed.
8. For proper cleaning and flushing, use the Carrier Totalclaimt recovery system or a comparable refriger­ant recycling system.
9. Install new compressor and braze into place with field­supplied copper slip couplings.
10. Connect wiring: replace wire terminals if necessary.
12. Start up unit.
PREVENTIVE MAINTENANCE
General
Thoroughly clean basepan, motors, fan wheels,othercom­ponents, and all drain passages. Vacuum insulation. Clean all inside paintedsurfaceswithmilddetergenttoremovegrease.
Clean cabinet and grille. Mild detergents reduce electro­static charges on plastic sections of the grille and are good cleaners. Do not usecarbon tetrachloride, solvents, or waxes containing solvents to clean plastic sections.
PAINTING — Paint any parts that show evidence of rust with a good rust-resistant paint.
WIRING — Check all wiring for deterioration and all elec­trical contacts for tightness and lack of corrosion.
MOUNTING — Make sure unit is secure in window, and level from left to right and from front to rear according to installation instructions provided.
Check fans to ensure they are correctly positioned, cen­tered in orifice, and tight on shaft.
2
LEAKS — Check any connectionsthat show evidence of oil or leaks. When unit is properly installed, centered, and lev­eled (see Owners’ Guide), check gaskets and wing panels for possible air leakage.
Vibrationscan cause unwanted noise. Check to be sure no
piping is vibrating against any side of unit.
System Cleaning/Flushing — For proper cleaning
and flushing, use the Carrier Totalclaim recovery system, or a comparable refrigerant recycling system.
Table 2 — Physical and Electrical Data — 1993-1995 Model Offerings
SERVICE/
DISCRETE
NO.
73TCA005101B S-1 115 104-127 5100 10.00 7.5 5.7 630 8.1 73TCA005111B S-1 115 104-127 5100 13.00 7.5 5.7 630 8.1 73TCA005121B S-1 115 104-127 5000 13.70 7.5 5.4 593 8.0 73TCA005131B S-1 115 104-127 5000 13.70 7.5 5.4 593 8.0 73TCA005141B S-1 115 104-127 5000 10.20 7.5 5.9 630 8.0 73TCA005151B S-1 115 104-127 5000 10.20 7.5 5.9 630 8.0 73TCA005171B S-1 115 104-127 5000 9.20 7.5 5.9 625 8.0 73TCA005101D S-1 115 104-127 5400 11.25 12.0 5.4 593 9.1 73TCA005101L S-1 115 104-127 5100 10.00 7.5 5.7 630 8.1 73TCA005111L S-1 115 104-127 5000 10.20 7.5 5.9 630 8.0 73TCA005121L S-1 115 104-127 5000 9.20 7.5 5.9 625 8.0 73TCA006101D S-1 115 104-127 6000 12.50 11.6 6.5 691 8.6 73TCA006111D S-1 115 104-127 6000 13.50 13.0 6.7 697 8.6 73TCA006121D S-1 115 104-127 6000 13.50 13.0 6.7 697 8.6 73TCA008101D S-2 115 104-127 8000 21.50 12.1 7.5 870 9.2 73TCA008101P S-2 115 104-127 8600 22.25 12.2 7.5 862 10.0 73TCA010101D S-2 115 104-127 9900 24.00 15.5 9.4 1092 9.0
CASING
(See Table 6)
V-PH-Hz 115-1-60
VOLTAGE
RANGE
COOLING
CAPACITY*
(Btuh)
R-22
CHARGE
(OZ. ± .05)
WET BULB
DtF
AMPS WATTS
EER
(DOE)
SERVICE/
DISCRETE
NO.
73TCA005101B 96 RC-1/FC-1 HC01CE118 0.74 D-1 Z-1 CD-1 73TCA005111B 96 RC-1/FC-1 HC01CE118 0.74 D-2 Z-1 CD-2 73TCA005121B 96 RC-2/FC-1 HC01CE118 0.74 M-1 Z-1 CD-3 73TCA005131B 96 RC-2/FC-1 HC01CE117 0.70 M-1 Z-1 CD-3 73TCA005141B 96 RC-1/FC-1 HC01CE118 0.74 D-3 Z-1 CD-4 73TCA005151B 96 RC-2/FC-1 HC01CE118 0.74 D-3 Z-1 CD-4 73TCA005171B 96 RC-2/FC-1 HC01CE118 0.74 D-3 Z-1 CD-4 73TCA005101D 91 RC-2/FC-1 HC01CE117 0.74 M-1 Z-1 CD-5 73TCA005101L 96 RC-1/FC-1 HC01CE118 0.74 D-1 Z-1 CD-1 73TCA005111L 96 RC-2/FC-1 HC01CE118 0.74 D-3 Z-1 CD-4 73TCA005121L 96 RC-2/FC-1 HC01CE118 0.74 D-3 Z-1 CD-4 73TCA006101D 92 RC-2/FC-1 HC01CE117 0.74 M-2 Z-1 CD-6 73TCA006111D 91 RC-2/FC-1 HC01CE118 0.70 D-4 Z-1 CD-7 73TCA006121D 91 RC-2/FC-1 HC01CE118 0.70 D-4 Z-1 CD-7 73TCA008101D 99 RC-3 HC43CE115 1.25 T-1 Z-1 CD-8 73TCA008101P 99 RC-4 HC33CE116 1.60 T-1 Z-1 CD-9 73TCA010101D 98 RC-4 HC33CE116 1.60 T-2 Z-1 CD-10
AHAM — Association of Home Appliance Manufacturers ANSI — American National Standards Institute DOE — Department of Energy EER — Energy Efficiency Ratio FLA — Full Load Amps PF — Power Factor
LEGEND
PF
(%)
CAPACITOR
(See Table 5)
FAN MTR CARRIER
P/N
FAN MTR
FLA
COMPRESSOR
(See Table 7)
Dt — Entering wet-bulb temperature minus leaving wet-bulb tem-
perature based on 67 F room wet-bulb temperature and 95 F dry-bulb outside-airtemperature.Ifconditionsvary,wet-bulb Dt will vary.
*Based on AHAM Standard RAC-1 and ANSI Z234.1.
THERMISTOR
(See Table 4)
CAPILLARY
DATA
(See Table 3)
3
Table 3 — Capillary Data
KEY NUMBER
(See Table 2)
CD-1 24.0 0.042 1 CD-2 13.5 0.042 1
CD-3 CD-4 20.0 0.042 1 CD-5
CD-6
CD-7
CD-8
CD-9
CD-10
DIMENSIONS (in.)
LENGTH
40.0 0.036
44.0 0.036
36.0 0.036
40.0 0.036
26.0 0.036
32.0 0.036
36.0 0.036
48.7 0.036
30.3 0.042
27.3 0.042
18.5 0.036
24.0 0.036
16.0 0.036
40.0 0.036
DIMENSIONS (in.)
ID
NO. OF
CAPILLARIES
2
2 2 2 2 2
318.0 0.036
Table 4 — Thermistor
KEY NO.
(See Table 2)
Z-1 HC95XX006 25
CARRIER
P/N
RESISTANCE
Table 5 — Capacitors
KEY NO.
(See Table 2)
FC-1 HC91PD005 5 250 RC-1 HC91EA025 25 370 RC-2 HC91EA035 35 370 RC-3 HC93CA027 25 370 RC-4 HC93CA028 25 370
LEGEND
MFD — Microfarad
CARRIER
P/N
MFD VOLTS
Table 6 — Casing Dimensions (in.)
KEY NO.
(See Table 2)
S-1 14 19 11 S-2 15
HEIGHT WIDTH DEPTH
1
⁄
2
22 141⁄
Table 7 — Compressors
KEY NO.
(See Table 2)
D-1 P033-0604 115 37.0 6.22 D-2 P033-0605 115 37.0 6.22 D-3 P033-0601HE 115 37.0 6.22 D-4 P033-0606 115 33.0 5.50 M-1 P034-0502 115 34.0 4.80 M-2 P034-0602 115 40.0 5.70 T-1 P031-0802 115 39.2 6.60 T-2 P031-1004 115 48.3 8.60
LEGEND
FLA — Full Load Amps LRA — Locked Rotor Amps
REPLACEMENT
PART NO.
VOLTS
(Single-Phase,
60 Hz)
(Ohms)
LRA FLA
Table 8 — Receptacles, Fuse Types, Wire Sizes
UNIT NAMEPLATE VOLTAGE 115 MAXIMUM NAMEPLATE
AMPS
OUTLET RATED VOLTS/
AMPS
RECEPTACLE
CONFIGURATION
MFR PART NO.
Hubbell 5261 5361 P&S 6201 5361 GE GE5261-1 GE4102-1 Arrow-Hart 5261 5361
TIME-DELAY FUSE OR CIRCUIT
BREAKER SIZE (AMPS) 15 20* FUSE TYPE Plug
RECOMMENDED AWG
WIRE SIZE† 14 12
AWG — American Wire Gage
*May be used for 15-amp applications if fused for 15-amp.
†Based on copper wire at 60 C temperature rating.
2
12 16
125/15 125/20
4
DISASSEMBLY INFORMATION
Before working on any air conditioner, be sure to first disconnect all electric power to unit to avoid the pos­sibility of electrical shock and personal injury.
IMPORTANT: It is not necessary to totally disas­semble all sections of this airconditioner forevery ser­vicing operation. Some of the disassembly steps may be necessary for your particular need. Disassemble as needed.
Filter Removal
1. Grasp molded top edge of filter and pull filter straight up and out of unit. See Fig. 2.
2. Vacuum filter, or wash filter in lukewarm water. Remove excess water and let filter dry before replacing.
3. Replace filter by sliding filter straightdown into filterslot.
PULL FILTER STRAIGHT UP
TEMPERATURE
OPEN
ENERGY SAVER
COOLER
8
6
10
4
12
2
14
MED
COOL
MODE
OFF
FAN
LOW
COOL
ON
PULL GRILLE TOWARD YOU, THEN UPWARD
Fig. 3 — Removing Front Grille
3. Remove screw and set aside for later assembly.
4. Carefully lift dischargeair deck upward and slide deck to the left. See Fig. 4.
5. Replace discharge air deck by reversing the above procedure.
EXHAUST
TEMPERATURE
ENERGY SAVER
OPEN
COOLER
8
6
4
2
14
ON
MODE
10
OFF HIGH COOL
12
FAN
MED COOL
LOW
COOL
Fig. 2 — Removing Filter
Front Grille Removal
1. Ensure unit carry-handle is fully extended. This willavoid obstruction when removing front grille (applies to Siestat I 005 and 006 units only).
2. Grasp front grille with both hands at lower sides of front grille. See Fig. 3.
3. Pull front grille straight toward you.
4. Tiltfront grilleslightly upward, liftingfront grilleoff unit.
5. To replace front grille, carry handle must be fully ex­tended (applies to Siesta I 005 and 006 units only).
6. Place front grille onto unit top edge, rotate front grille downward and firmly push bottom of front grille into position.
Discharge Air Deck Removal
1. Remove 2 control knobs by pulling knobsstraight up. (Set knobs aside for later replacement.)
2. Locate single screw in temperature (thermostat) knob cavity.
LIFT DECK, SLIDE IT TO LEFT
SCREWS
Fig. 4 — Air Discharge Deck Removal
Accessing Control Box Components
1. Remove screw (located betweenevaporator coil and con­trol box) holding control box.
NOTE: If unit is 008P unit, proceed to step no. 2. If unit is not 008P unit, proceed to step no. 3.
2. Carefully unsnap exhaust door lever plastic retainer and put aside for assembly. See Fig. 5.
3. Swing control box to right to gain access to components. See Fig. 6.
5. Replace control box by reversing above procedure.
5
RETAINER
EXHAUST LEVER
2. Remove metal clip which connects bulb heater to ther­mostat sensing bulb. See Fig. 7.
4. Reverse above procedure for reassembly.
Thermostat Bulb Heater Removal (008P Unit Only) —
of thermostats when handling bulb heater. See Fig. 7.
1. Carefully disconnect bulb heaterwires from terminals in­side the control box. Label wires to aid in reassembly.
2. Carefully remove metal clip which connects bulb heater to thermostat sensing bulb. See Fig. 7.
3. Carefully remove bulb heater wires from braided sleeve. See Fig. 7.
4. Reverse above procedure for reassembly.
Use care not to damage sensing bulb orcapillary
Fig. 5 — Removing Exhaust Door Retainer
RETAINING SLOTS
CAPACITOR
CONTROL BOX HOOK (2)
CAPACITOR STRAP
SWING CONTROL BOX GENTLY TO RIGHT TO GAIN ACCESS
Fig. 6 — Accessing Control Box
Capacitor Removal
1. Before disconnecting, discharge capacitor by shortingca­pacitor across terminals.
2. Remove screw fastening capacitor strap to control box. See Fig. 6.
3. Carefully disconnect wires from capacitor terminals. Label wires to aid in reassembly.
4. Reverse above procedure for reassembly.
ThermostatRemoval — Indoor thermostat is a vapor-
filled device. The 008P unit employs a thermostat bulb heater. Use care not to bend or kink the thermostat sensing bulb or capillary.
NOTE: If unit is 008P unit, proceed to step no. 2. If unit is 008P unit, proceed to step no. 3.
METAL CLIP CONNECTS BULB HEATER TO THERMOSTAT SENSING BULB
THERMOSTAT BULB HEATER
BRAIDED SLEEVE
EXHAUST
OPEN
TEMPERATURE
COOLER
6
10
4
12
14
2
ENERGY SAVER
ON
MODE
HIGH
FAN
COOL
LOW
MED
COOL
COOL
Fig. 7 — Removing Thermostat
Mode Selector Switch Removal
1. Remove 2 screws holding selector switch to the control box. See Fig. 8.
2. Carefully disconnect wires from switch terminals. Label wires to aid in reassembly.
3. Reverse above procedure for reassembly.
Fan Cycle Switch (Energy Saver Switch) Removal (008P Unit Only)
1. Disconnect wires from switch. Label wire to aid in reassembly.
2. Remove 2 screws securing fan cycle switch and remove switch. See Fig. 8.
3. Reverse above procedure for reassembly.
Wing Panel(s) Removal
NOTE: When wing panel(s) are being removed, the upper and lower frame partswill separate slightly from the curtain. Hold the upper and lowerframe parts securelyin placewhile performing steps no. 1 and 2. See Fig. 8.
1. Pull wing panel open to its fully opening width. Wing panel frame will be completely out of unit tracks. See Fig. 8.
3. To replace wing panel, compress curtain in frame. Insert ends of top and bottom frame parts as far as possible into unit side. See Fig. 9.
6
SELECTOR
CAUTION
ATTENTION
FILE LR3342
Carrier
Corporation
Syracuse, New York
USE
AMP
TIME DELAY FUSE
OR
CIRCUIT BREAKER
DESIGN PLUG HI 350 LG 150
VOLT RANGE
VOLTS
PH
MODEL/CATALOG
SERVICE
DATE OF MFG.
SERIAL
DISCRETE
HZ
R-22-OZ.
STU/NR
AMPS
WATTS/INPUT
EER
MADE IN MEXICO
MOTOR COMPRESSOR THERMALLY PROTECTED
LISTED
ROOM AIR
CONDITIONER GL16
S1TH500152
REAR SCREWS (6)
TOP REAR COVER
SWITCH SCREWS (2)
Fig. 8 — Removing Wing Panel
WING PANEL CURTAIN COMPRESSED IN FRAME
EXERT SLIGHT FORCE TO SECURE PANEL FRAME
FAN CYCLE SWITCH (008P MODEL ONLY)
SLIDE PANEL FRAME OUT OF UNIT TRACKS, THEN LIFT UPWARD
FAN CYCLE SCREWS (2)
3. Remove unit rear outdoor grille.
4. Remove ground screw in control box section. See Fig. 11.
5. Remove compressor terminal cover. See Fig. 11.
6. Disconnect 3 compressor wire quick-connects. Label wires to aid in reassembly.
7. Carefully bend evaporator coil assembly tubing outward and away from indoor blower wheel to allow for removal of air-handling system. See Fig. 12 for major sections separated.
8. Carefully remove air-handling system by gently pulling straight up. See Fig. 13.
9. Reverse above procedure to replace components after servicing.
Exhaust Feature (008P Unit Only) — See Fig. 5
and 14 for any servicing and/or adjustment pictorial description.
Fan Motor Removal
OUTDOOR FAN
1. Remove center nut securing outdoor fan to fan motor shaft. See Fig. 14.
2. Remove outdoor fan.
3. Disconnect outdoor fan motor wiring. Label wires to aid in reassembly.
4. Remove 3 screws securing fan motor to unit partition. See Fig. 14.
5. Remove fan motor.
INDOOR BLOWER WHEEL
1. Remove clip securing blower wheel to fan motor shaft. See Fig. 12.
2. Reverse above procedures to replace components.
Fig. 9 — Replacing Wing Panel
4. When curtain framewill not slide inward anyfurther, use hand to bump frame inward toward unit.The force of your hand will secure thecurtain in position against the side of the unit. See Fig. 9.
AccessingCompressor,Fan Motor,Outdoor Coil Sections
1. Remove 3 screws on each side of unit (save screws). See Fig. 10.
2. Remove top rear cover. See Fig. 10.
Fig. 10 — Removing Rear Cover
7
COMPRESSOR TERMINAL COVER
Fig. 13 — Removing Air Handling System
FAN MOTOR
FAN MOTOR SECURING SCREWS (3)
EXHAUST DOOR LINKAGE
GROUND SCREW
GROUND WIRE
Fig. 11 — Accessing Compressor
BLOWER WHEEL CLIP
INDOOR BLOWER WHEEL
Fig. 12 — Accessing Air-Handling System
EVAPORATOR COIL ASSEMBL Y
OUTDOOR FAN CENTER NUT
OUTDOOR FAN
Fig. 14 — Fan Motor Removal
EXHAUST DOOR
8
SERVICE POINTS
(Check Annually)
1. Clean indoor and outdoor coils. Indoor Coil — Use a hooked wire or bristle brush to
remove dirt from fins. Outdoor Coil — Use compressed air or a vacuum cleaner.
2. Clean basepan and other painted surfaces.
3. Clean all drain passages.
4. Clean motor and fans.
5. Vacuum clean the insulation.
6. Paint parts that show evidence of rust with a good rust­resistance paint.
7. Check refrigerant connections for evidence of leakage. Repair if necessary.
8. Check wires for deterioration.
9. Fans should be tight on motor shaft.
10. Run the unit and eliminate any piping vibration.
11. Check thermostat capillaries for proximity to refriger­ant tubing (should not be touching). Check to be sure protective sleeve is in place.
9
TROUBLESHOOTING
SYMPTOM AND
PROBABLE CAUSE COMPRESSOR DOES NOT RUN Opening in Power Circuit
1. Control off 1. Reset control button.
2. Blown fuse 2. Replace fuse.
3. Defective wiring 3. Replace wiring.
4. Defective service cord 4. Replace service cord.
5. Loose electrical connections 5. Tighten connections.
6. Faulty switches, thermostat, or fan 6. Replace defective component. Compressor Power Supply Open
1. Loose leads at compressor terminals 1. Tighten leads.
2. Defective motor overload switch 2. Replace switch.
3. Defective capacitor 3. Replace capacitor.
4. Open compressor windings 4. Replace compressor.
5. Seized compressor 5. Replace compressor. COMPRESSOR RUNS BUT CYCLES Fan Operating Erratically
1. Loose lead at fan motor 1. Tighten lead.
2. Defective or burned out motor 2. Repair or replace motor.
3. Outdoor air restricted or recirculating 3. Check for dirty filter, proper clearances around unit —
4. Overcharge or noncondensables in system 4. Reclaim refrigerant, evacuate and recharge system according to
5. Restricted discharge line 5. Check for obstruction in line; replace tubing if required.
6. Defective motor overload switch 6. Replace switch.
7. Outdoor thermostat capillary touching suction tube 7. Move thermostat capillary away from suction tube.
8. Outdoor coil freezing up due to low temperature
(outdoor thermostat may be set too low)
Cycles on Compressor Overload
1. Defective run capacitor 1. Replace capacitor.
2. Defective compressor bearings or valves 2. Replace compressor.
3. Greatly restricted indoor air (iced indoor coil) 3. Defrost indoor coil
4. Low refrigerant charge 4. Add charge according to approved method.
5. Indoor capilliary restricted 5. Replace capillary.
6. Liquid line restricted 6. Replace strainer.
7. Compressor hot 7. Verify refrigerant charge.
8. Weak or inconsistent line power 8. Check line voltage at time of compressor start-up. INSUFFICIENT COOLING Cooling Air Not Adequate
1. Dirty filter or coil 1. Clean as required.
2. Iced indoor coil (slightly low refrigerant charge) 2. Recharge.
3. Defective fan motor 3. Replace fan motor. Condenser Air Not Adequate
1. Outside air restricted 1. Check for obstructions and dirty filter. Remedy as required.
2. Dirty coil 2. Clean coil.
3. Defective fan motor 3. Replace fan motor. Unit Undersized Re-evaluate unit for proper capacity. Capilliary Restricted Replace capillary. Compressor Flooding
1. Unit overcharged 1. Reclaim refrigerant, evacuate and recharge system according to
2. Defective electrical connections 2. Check connections per wiring diagrams.
PROBABLE REMEDY
remove any obstructions. nameplate specifications.
8. Set outdoor thermostat higher.
nameplate specifications.
10
Copyright 1996 Carrier Corporation
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1 4
Tab 8a 10a
PC 131 Catalog No. 537-327 Printed in U.S.A. Form 73TC-1SS Pg 12 1-96 Replaces: New
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