Table of Contents
Troubleshooting
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Summary of Contents for ComfortStar BAR7 Series
- Page 1 INSTALLATION AND OPERATION MANUAL Air Conditioner 1.5-5 Tons R454B UP TO 15.2 SEER2 匾圈壁 Please read this manual carefully and keep it f o r future reference. All the pictures in this manual are f o r illustrations purpose only.
- Page 2 心 ． RECOGNIZE THIS SYMBOLAS AN INDlCATlON OF lMPORTANT SAFETY INFORMATION These instructions are intended as an aid to qualified licensed service personnel for proper installation, adjust ment and operation of this unit. Read these instructions thoroughly bef o re attempting installation or operation. Failu「e to f o llow these instructions may result in improper installation, adjustment, service or maintenance possibly resulting in fire, electrical shock, property damage, personal injury or death.
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Page 3: Table Of Contents
CONTENTS 1 SAFETY • 1.1 S afet y S ign s • 1.2 S afet y Pre c a u h on s 2 UNIT LOCATION CONSIDERATIONS • 2.1 U nit D imensions ·· ·· · ·· ··· ·· · ·· ·· · ·· · ·· ·· · ·· · ·· ·· · ·· · ·· ·· · ·· ··· ·· · ·· ·· · ·· · ·· ·· · ·· · ·· ·· · ·· ··· ·· · ·· ··· ·· · ·· ·· · ·· · ·· ·· · ·· · ·· ·· · ·· ·· 08 •... - Page 4 14 START UP • 1 4 .1 S y s t e m S t ar t Up ··············································································································· 2 4 15 SYSTEM C HAR G E ADJUSTMENT • 1 5 .1 Ch a rging: S u p e rh ea t ing Ch a rging in C oo l ing fo r P i s t o n M a t ch-Up s ( a b o v e 55 °F ou t d oo r t e m p )--··························································································...
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Page 5: Safety
1 SAFETY 1.1 Safety Signs 勹： ；a)e言 2 ?； 己 ：心I 心心 ale rt the use r to pot e ntia l haz a rds . All safety me s sag es tha t fo llow this s :: ＼ r 点。．... -
Page 6: S Afet Y Pre C A U H On S O2
＿谓I”“d4i- 1.2 Safety Precautions HAZARDOUS VOLTAGE Please read before proceeding Failure to follow this warning could result in property damage, severe personal injury, or -平示户罚：一 death. Disconnect all electric power, Including remote ELECTRICAL HAZARD 380 VOLTS DC disconnects before servicing. Follow proper lockout/tagout procedures to ensure the power Failure to follow this warning could result in cannot be inadvertently energized. - Page 7 -,“'｀`汛||冲［C 面冈'- Risk of electric shock. Can cause injury or death. SERVICE VALVES Disconnect all remote electric power supplies Failu「e to follow this warning will 「esult in ab「upt before servicing. elease of system charge and may result in 「 Risk of fire mild. Flammable refrigerant used. To personal injury and/or property damage.
- Page 8 一＾ 旰6 A示 - If an indirect refrigerating circuit is being used, the secondary circuit shall be checked for the When repairing the refrigerating system, comply presence of refrigerant. with the following precautions prior to conducting work on the system: - Equipment marking must remain visible and legible.
- Page 9 If a leakage of refrigerant which requires brazing In general, R454B doesn't have a siphon tube or is f o und, all of the 「efrigerant shall be 「ecove「ed dip tube into tank. For this situation, they must be charged in liquid f o rm to prevent fractionation om the system, or isolated(by means of shut off 「...
- Page 10 Do not dispose of electrical appliances as When emoving refrigerant from a system, either 「 unsorted municipal waste. Use separate for servicing o decommissioning, it is 「 collection facilities. Contact your local recommended that all refrigerants are removed government for information regarding the safely.
- Page 11 -Am示旰C Signs fo similar appliances used in a work area 「 are generally add essed by local regulations and 「 This outdoor unit must combine the indoor unit give the minimum requirements f o r the provision with a refrigerant leak detection device. health signs f o r a work location.
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Page 12: Unit Location Considerations
2.3 Required Refrigerant Line 2 UNIT LOCATION 一＾ Length CONSIDERATIONS Total equivalent length(Feet) Model Liquid line 75 100 125 150 (inches) Maximum vertical length(Feet) Ensure that apparatus is mounted securely. 5/16 5/16 2.1 Unit Dimensions 5/16 Unit Dimensions 5/16 Model H(inches) W(inches) L(inches) -
Page 13: Location Restrictions
• Units should be elevated 3-12 inches above the pad or rooftop, 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 obstructed, preventing drainage of defrost water (Fi g. -
Page 14: Refrigerant Charge And Room Area Limitations
2.5 Refrigerant Charge and Room The area of the connected rooms, on the same floor.connected by permanent opening in the walls Area Limitations and/or doors between occupied spaces, including gaps between the wall and the floo ,can be considered a 「... - Page 15 ＿＿ ＿＿ T he equired minimum room area T he minimum opening area for connected rooms 「 Am,ITAm;, AmlJTAmm Anv ,.0 咋 lb-oz －尸一一 lb-oz lb-oz lb-oz 33.1 10-2 152.1 14.2 17-3 6-10 0.13 39.7 158.7 14.8 10-9 17-3 0.12 165.3 46.3 11-0...
- Page 16 -｀必U L"上一 If the altitude of installation is higher than 2000 ft, the required minimum room area follow as Table 2-9. If the actual room area, air outlet height, and Altitude(ft) refrigerant charge amount are not reflected in 2001- 4001- 6001- 8001- 10001- 12001- 14001- above the above table, more severe cases need to be 4000 6000 8000 1 0000 12000 14000 15000 15000 considered according to the data in the Tables...
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Page 17: Unit Preparation
·L.t ` ．从． 一 3 UNIT PREPARATION 一 These instructions are intended to provide a 3.1 Pre-installation method to tie-down system to concrete slab as a securing procedure for high wind areas. Check STEP 1 - Check for damage and report promptly to the Local Codes for tie-down methods and protocols. -
Page 18: Refrigerant Line Considerations
5.3 Reuse Existing Refrigerant Lines 5 REFRIGERANT LINE . ^ ， CONSIDERATIONS 5.1 Service Valve Connection Sizes If using existing refrige ant lines make certain 「 that all joints are brazed, not soldered. Suction line Liquid line Models connection connection 一... -
Page 19: Refrigerant Line Routing
6 REFRIGERANT LINE ROUTING 6.1 Precautions 一·比i Take precautions to p event noise within the building structure due to vibration transmission from the ref igerant lines. 「 「 For example: • When the refrigerant lines have to be fastened to floor joists or other framing in a structure, use isolation type hangers. - Page 20 Wall ealant Insulation Suction Line DO NOT hang line sets from ductwork Isolation Through Wall Figure 6-3 Tolndoo「Coil To Outdoor Unit Insulated Suction Line Liquid Line Ca p PVC Conduit Figure 6-4...
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Page 21: Refrigerant Line Connection
7 REFRIGERANT LINE 8 REFRIGERANT LINE BRAZING CONNECTION 8.1 Braze the Refrigerant Lines 一＾ 7.1 Connecting to Refrigerant Lines 1. Remove caps or plugs. Use a deburing tool to debur the pipe ends. Clean both internal and external surfaces of the tubing using an emery cloth. 面冈'- Pipe work and installation shall be in compliance 夕... -
Page 22: Refrigerant Line Leak Check
4. Wrap a wet rag around the valve body to avoid heat 9 REFRIGERANT LINE LEAK damage and continue the dry nitrogen purge (Fig. CHECK 8-4). Braze the refrigerant lines to the service valves. 9.1 Check for Leaks Check liquid line filter drier's directional flow arrow to confirm correct direction of refrigeration flow (away 1. -
Page 23: Evacuation
10 EVACUATION 11 SERVICE VALVES 10.1 Evacuate the Refrigerant Lines 11.1 Open the Service Valves and Indoor Coil -VI`` ` tC- 一 ·｀ ku - 汕|沁 Extreme caution should be exercised when opening the Liquid Line Service Valve. Turn Do not open the service valves until the counterclockwise until the valve stem just igerant lines and indoor coil leak check and 「... -
Page 24: Electrical - Low Voltage
12 ELECTRICAL - LOW VOLTAGE In the U.S.A., wiring must conform with cu ent local, codes and the current National Electric Code (NEC). In Canada, 「「 ing must conform with current local codes and the current Canadian Electrical Code (CEC). 「... -
Page 25: Low Voltage Wiring
12.2 Low Voltage Wiring electrical control box panel 丿 Power electrical control box panel Figu e 12-1 Figure 12-2 Control wi 「 「 ．雪' ` Low Voltage line must be connected inside the outdoor unit case through control wiring channel on the right. High Voltage line must be connected through power wiring channel on the left. -
Page 26: Indoor Unit
For Air Conditioners systems, Y2 only for 61 K 愚 THERMOSTAT _ _ _ _ _ _ _ _ _ _ _ 山 l & 山 T d 工 n d ln n - 岁 司 ＿ 戏 CN36 CN14 TO THERMOSTAT INDOOR UNIT OUTDOOR UNIT... -
Page 27: Electrical - High Voltage
一·｀ 13 ELECTRICAL - HIGH VOLTAGE Electrostatic discharge can affect electronic ing must conf o rm with current local In the U.S.A., wi components. Take care during unit installation 「 codes and the current National Electric Code (NEC). In and service to protect the unit's electronic Canada, wiring must conform with current local codes controls. -
Page 28: High Voltage Wiring
13.3 High Voltage Wiring 14 START UP 14.1 System Start Up 1. Remove the electrical control box panel. Refer to Figure 13-2. 1. Ensure Sections 7, 8, 9, 10, 11, 12, 13, have been completed. Check the electrical wiring again, and check whether the DIP switch meets the electrical control requirements according to the wiring diagram on the... -
Page 29: System Charge Adjustment
15 SYSTEM CHARGE For best results the indoor temperature should be kept between 70 °F to 80 °F during the install. ADJUSTMENT 15.1 Charging: Superheating 80 °F Charging in Cooling for Piston Match-Ups 70 °F (above 55 °F outdoor temp) 1.Check the outdoor ambient temperatures. - Page 30 18KAC ° Add 2 of Superheat 蔥 宁 ° Add 4 of Supe heat 「 ..I 士 岂 ；二 Use Design Superheat Value ° Add 2 of Supe heat 。 「 飞 江 Total Refrigerant Line Length-feet Table 15-2 24KAC °...
- Page 31 芯 」 ， 拦 7 lU 42KAC 亡 岁 ” ° Add 4 of Superheat Add 2 ° of Superheat Add 6 ° of Superheat 芯 Add 2 ° of Superheat Use Design Superheat Value ° 』 Add 4 of Superheat ，...
- Page 32 R454B Refrigerant Superheat chart r1 I 『 』「 [］［］[』『［］［[] Final Superheat ( ° Suction Temp ° Suction Gauge Pressure (PSI) Figure 15-5 7. Stabilize the system. • Wait 20 minutes fo the system condition to stabilize 「 between adjustments. 一·｀ Table 15-9 When the suction line pressure match the chart, the system is properly charged.
- Page 33 15.2 Charging: Subcooling Charging For best esults, the indoor temperature should be 「 kept between 70 °f and 80 °f during the install. in Cooling for TXV Match-Ups (above 55 °F outdoor temp) 1. Check the outdoor ambient temperatures. When the system matches up with TXV, subcooling charging (in cooling mode) is the only recommended 一·U`．』...
- Page 34 Determine total efrigerant line length, and height (lift) i们ndoor section is above the condenser. Use the T able15-12 to calculate 「 any additional subcool required fo specific application. 「 「 SUBCOOL CHARGING TABLE CORRECTIONS FOR LINE LENGTH AND RISE ＄ 士...
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Page 35: Charging: Weigh-In Method
6. Adjust refrigerant level to attain proper gauge pressure. 15.3 Charging: Weigh-In Method 一唱沁j Weigh-In method can be used fo the initial installation, 「 Add refrigerant if the subcooling reading from or anytime a system charge is being replaced. Weigh-In Table 15-13 is lower than the designed value Method can also be used when power is not available from step 4. -
Page 36: System Operation And Troubleshooting
16.3 Two-Stage Compressor 16 SYSTEM OPERATION AND ( 61 K AC on ly) TROUBLESHOOTING The 61 K AC Systems feature a two-stage scroll compressor which is controlled by Y1 and Y2. 16.1 Protection Function • Y1: 24VAC thermostat input for first stage operation of the unit. -
Page 37: Temperature Sensor Resistance Table
16.4 Temperature Sensor Resistance Table Tempe ature °F Resistance kQ Temperature °F Resistance kQ Temperature °F Resistance kO Temperatu e °F Resistance kQ 「 「 106.73 29.87 3.69 103.25 29.22 3.61 9.26 3.53 99.89 28.19 。 27.39 9.03 3.45 96.65 93.53 26.61 8.81... -
Page 38: Error Code Table And Troubleshooting
16.6 Error Code Table and Troubleshooting Code Description Possible Reason T3 sensor fault T3 sensor is short circuit or open circuit T 4 sensor fault T 4 sensor is short circuit or open circuit Capacity setting not set Capacity setting(SW2) isn't set/Program error Fan is failure/Control board in outdoor unit is failure R 110 resistor or drive chip software fault Service valves are not open/Poor heat exchange on... -
Page 39: Status Code
16. 7 Status Code Code I Description Standby Cooling mode Heating mode Forced cooling mode Defrosting mode Abnormal signal Table 16-5 16.8 Parameter Point Check Table To display system parameters, press the "Check" button to index through the series of parameters available. The first time you press the "Check"... -
Page 40: Service
17.2 Changing Motor 17 SERVICE When motor requires changing, follow the steps below: Assist owner with processing Warranty cards and/or online registration. STEP 1 - Go into electrical panel, disconnect motor 17.1 Maintenance power lines. Note: Disconnect main power to unit. Severe burns and Dirt should not be allowed to accumulate on the indoor or electrical shock will occur if you do not disconnect main outdoor coils or other parts in the air circuit. -
Page 41: 8 W I R I N G D I A G Rams
18 WIRING DIAGRAMS unit 骂 F器器N� 1 0 _ _ ��� __ _ 1. B terminal is c nnected and ene gized f heating peration. WHITE 2. W te minal is ene gized in def sting CN 7 , 口 HPC 3. - Page 42 19 CHECKLIST Operational and Checkout Procedures Final phases of this installation a「e the unit Operational and Checkout Procedu「es. To obtain prope「 performance, all units must be operated and charge adjustments made in accordance with procedures found in the Service Facts of the Outdoor Unit. After installation has been completed, it is recommended that the entire system be checked against the following list: on top of the unit·…...
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