Carrier 040-420 specifications Complete Unit Stoppage Complete unit stop

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TROUBLESHOOTING

The FlotronicTY II control has many features to aid the technicians in troubleshooting a Flotronic II Chiller. By us- ing keypad and display module and status function, actual operating conditions of the chiller are displayed while unit is running. Test function allows proper operation of com- pressors, compressor unloaders, fans, EXVs and other com- ponents to be checked while chiller is stopped. Service function displays how configurable items are configured. If an op- erating fault is detected, an alarm is generated and an

alarm code(s) is displayed under the subfunction m I;;;;] ,

along with an explanation of the fault. Up to 5 current alarm codes are stored. For checking specific items, see Table 9.

Checking Display Codes - To determine how ma- chine has been programmed to operate, check diagnostic

information (( w ) and operating mode displays (/ Fi ).

If no dismay annears, follow procedures in Control Mod-

ules section+onlpage 64. If display is working, continue as follows:

1. Note all alarm codes displayed, F\ bi .

2.Note all operating mode codes displayed, MH .

3.Note leaving chilled water temperature set point in ef-

fect and current leaving water temperature, MFI .

If machine is running, compare the “in effect” leaving water temperature set point with current water tempera- ture. Remember, if reset is in effect, the values may be different because machine is operating to the modified chilled water set point, If current temperature is equal to set point, but set point is not the one desired, remember that if dual set point has been selected in the schedule function, there are 2 set points to which the machine can be operating. Check the programming of schedule func- tion to see if occupied or unoccupied set point should be in effect.

Unit Shutoff - To shut unit off, move LOCAL/ ENABLE-STOP-CCN Switch to STOP position. Any re- frigeration circuit operating at this time continues to com-

plete the pumpout cycle. Lag compressors stop immediately, and lead compressors run to complete pumpout.

Complete Unit Stoppage - Complete unit stop-

page can be caused by any of the following conditions:

1

1. Cooling load satisfied

2. Remote ON/OFF contacts open

3. Programmed schedule

4.

Emergency stop command from CCN

5.

General power failure

6.

Blown fuse in control power feed disconnect

7.

Open control circuit fuse

13.Cooler entering or leaving fluid thermistor failure

14.Low transducer supply voltage

15. Loss of communications between processor module and other control modules

16. Low refrigerant pressure

Single Circuit Stoppage - Single circuit stoppage can be caused by the following:

1 Low oil pressure in lead compressor

2.Open contacts in lead compressor high-pressure switch

3.Low refrigerant pressure

4.Thermistor failure

5.Transducer failure

6.Ground fault in lead compressor indicator (indicator is field-supplied on 040-060, 070 [60 Hz], 080- 110, and associated modular units)

7.High suction superheat

8.Low suction superheat

9.Lead compressor circuit breaker trip+ Stoppage of one circuit by a safety device action does not affect other circuit. When a safety device trips on a lead compres- sor, circuit is shut down immediately and EXV closes.

10.Ground fault for any circuit compressor (130-210,225, 250, 280, and associated modular units).

Lag Compressor Stoppage - Lag compressor stop- page can be caused by the following:

1, Open contacts in high-pressure switch

2.Compressor ground fault (indicator is field-supplied on 040-060, 070 [60 Hz], 080- 110, and associated modular units)

3.Compressor circuit breaker trip

4.Not required to run to meet cooling load requirement

If stoppage occurs more than once as a result of any of the above safety devices, determine and correct the cause before attempting another restart.

Restart Procedure - After cause for stoppage has been corrected, restart is either automatic or manual, depending on fault. Manual reset requires that LOCAL/ENABLE- STOP-CCN switch be moved to STOP position, then back to original operating position. Some typical fault conditions are described below. For a complete list of fault conditions, codes, and reset type, see Table 14.

POWER FAILURE EXTERNAL TO THE UNIT - Unit restarts automatically when power is restored.

Typical Stoppage Faults and Reset Types

8.

LOCAL/ENABLE-STOP-CCN switch moved to STOP

 

position

9.

Freeze protection trip

10.Low flow protection trip

11.Open contacts in chilled water flow switch (optional)

12.Open contacts in any auxiliary interlock. Terminals that are jumpered from factory are in series with control switch. Opening the circuit between these terminals places unit in stop mode, similar to moving the control switch to STOP position. Unit cannot start if these contacts are open. If they open while unit is running, unit pumps down and stops .

Chilled Water, Low Flow Chilled Water, Low Temperature

Chilled Water Pump Interlock

Control Circuit Fuse Blown

High-Pressure Switch Open

Low Refrigerant Pressure

Low Oil Pressure

Discharne Gas Thermostat Open

Manual reset

Auto reset first time, manual if repeat

Manual reset

Unit restarts automatically when power is restored

Manual reset

Auto reset first time, then manual if within same day

Manual reset Manual reset

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Contents Contrc Unit Sizes and Modular Combinations Unit ModelKeypaddisplay Ground Fault Interrupter Source PSIRELAY, B FieldLOCAL/ENABLE-STOP-CCN Switch Positions and Operation Compressor Protection Control Module CpcsThermistor and Transducer Locations ThermistorsCapacity Control StepsLoading Sequence a Loading Sequence B Unit Control StepsCapacity Control Steps, 040-070 cant 060A\~**HzLoading Sequence a Loading Sequence B Unit Capacity Control Steps, 040-070 cant Oy&yaFBI Aiti 08Aqy,yA4l&pi’ Steps BP’Loading Loading Sequence B Unit Control Altt Bitt Wtf2Z$’Altt Loading Sequence a Loading Equence B UnitAmrox ’tt$-t&Z3 Displacement Compressors UWrW Arwox A2.p $#l 110 50 Hz Loading Sequence a Quence B Unit ControlAlt,Blv Displacement Compressors Mvrox Loading Equence aEquence B Awrox Drt,t 130, 24OA130,24OA 130, 240AAttll’ Loading Equence a UnitA2.p T3gLoading Sequence a Sequence B Unit $$V LOAD11 Control Size StepsLoadin Sequence B Unit Displacement Compressors UVvW PWprox 8514wB2,B3 Al% Al’,BILoading Sequence B Unit 30GT Displacement Compressors Awox Capacity Control Steps, 225, 250,280Loac \IG Sequence a Loading Sequence B Unit Capacity Control Steps, 225, 250,280 cant Loac30GT Capacity Control Steps, 225, 250, 280 cant 2501G Sequence a Loading Sequence B Unit ControlCondenser Fan Sequence FAN Arrangement FAN Numbers Contactor ControlledCondenser Fan Sequence cant FAN Arrangement FAN Numbers~jACToR 30GT250 60 HzKeypad and Display Module Also Called Hsio Keypad and Display Module UsageAccessing Functions and Subfunctions Functions and SubfunctionsFunctions Operation Keypad Display Description Entry ResponseKeypad Directory Keypad Directory cant Status cant Subfunction Keypadentry Display CommentPressure AnalogSubfunction Outputs Display Subfunction Keypad Entry Display Comment OutputsOutputs HgbraKeypad Directory cant Test cant Subfunction Keypad Entry Display Comment OverrideClock Select QzqKeypad Directory Schedule cant Keypad Directory cant Service cord Keypad Directory cant Example 1 Reading Alarm Codes Operationat and Mode Display CodesLocal on Cool Alarms Modes Local on M O D E Example 2 Reading Current Operating ModesKeypad Display Example 3 Using Test Function Example 4 Reading and Changing Chilled Water Set PointKeypad Display Comments Entry Response Example 5 Using Return Water Temperature Reset Keypad Display CommentsCRST2 CrstiExample 6 Changing Reset Type Reset Reference Temperature Outdoor AIR 1OR Space TempEKE Keypad Display Entry Response FLD CFG Ertyp Lstyp DemandPpiq Example 8 Setting Time of Day Day of Week Demand LimitingMAX Demand Kimax = Factory Configuration Keystrokes Adjustable Field ConfigurationsExample 9 Using the Schedule Function DisplayExample 9 Using the Schedule Function cant Example 10 Holiday Schedule FunctionTypical Stoppage Faults and Reset Types Complete Unit Stoppage Complete unit stopAlarm Codes Action Taken Probable Cause N T R O LPage Page ’ Sl R ’ STnanz Switch CGFCompressor Contactor Relay SNBFig. IOD 24-V Safety Circuit Wiring 225, 250, and 280 Units Electronil c Expansion Valve EXV Page Thermistor and Pressure Transducer Locations Refrigerant Temperature Sensor T7, T8 040-210 SuctionAssociated Modular Units Pressure Transducer 2i.b Voltage Drop Voltage Resistance DropEqualizer OIL Pressure Suction Pressure Sight Glass Line Transducer Each CompressorControl Modules PSIO, SIO Address SelectorSensor Bus Wiring Communications Processor Module PsioComm Troubleshooting Standard and Accessory Unloaders 1NO. of AccessoryCircuit Circuit B Or2 30GN190-210 3OGT225,250,280 Accessory Unloader Control Wiring 080-110 SO/SO Hz and 130 60 HzHgbpr TLNContactor Switch Circuit Breaker Transformer LmyTEF4Module STAGE2Module J7-15Thermistor ElJ7-16Installation Remote Dual Set Point ControlPage Page Copyright 1994 Carrier Corporation

040-420 specifications

The Carrier 040-420 is a highly regarded commercial HVAC unit specifically designed for efficient heating and cooling in medium- to large-sized buildings. Known for its reliability and advanced technology, this system is ideal for a variety of applications ranging from offices to industrial spaces.

One of the main features of the Carrier 040-420 is its energy efficiency. The unit utilizes advanced compressors and a high-efficiency heat exchanger, which work together to minimize energy consumption while maximizing performance. This is crucial in today’s energy-conscious environment, as businesses strive to reduce operational costs and their carbon footprint. The unit also boasts a high SEER (Seasonal Energy Efficiency Ratio) rating, making it an attractive option for those looking to lower their utility bills.

Equipped with advanced inverter-driven technology, the Carrier 040-420 allows for precise control of indoor climate conditions. This means that the system can adjust its output according to the actual cooling or heating demand of the space, resulting in enhanced comfort and reduced energy waste. The inverter technology also contributes to quieter operation, allowing for a more pleasant indoor environment.

Another feature that sets the Carrier 040-420 apart is its smart controls. The unit can be integrated with Carrier’s Building Automation Systems, enabling remote monitoring and management. This allows facility managers to optimize energy use and immediately respond to any performance issues. Additionally, the unit is compatible with various control interfaces, making it easy for users to adjust settings or schedule operations according to the building's occupancy patterns.

The robust design of the Carrier 040-420 ensures longevity and durability, even in harsh environmental conditions. Its weatherproof casing protects the internal components, enhancing the unit's performance and reliability over time. Maintenance is simplified with accessible design features, allowing technicians to conduct service checks and repairs without extensive downtime.

Overall, the Carrier 040-420 stands out as a modern HVAC solution that combines energy efficiency, advanced technologies, and user-friendly features. Its commitment to performance and sustainability makes it an ideal choice for businesses looking to enhance comfort while being mindful of their energy consumption. With its blend of innovation and reliability, the Carrier 040-420 continues to be a preferred option in the commercial HVAC market.
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