Carrier 040-420 specifications ’ Sl, R ’ S

Page 52

Possible causes of fault are low refrigerant charge, plugged filter drier, or a faulty EXV or thermistor.

Code 48 Low suction superheat, Circuit A Code 49 Low suction superheat, Circuit B

If EXV is at minimum position, suction superheat is less than 10” F (5.5” C) or saturated evaporator temperature is greater than MOP (maximum operating pressure) for more than 5 minutes, affected circuit shuts down after going through pumpout process, Reset is manual with LOCAL/ENABLE- STOP-CCN switch, and start-up follows normal sequence.

Possible causes of fault are faulty EXV or thermistor. Code 50 Illegal configuration

This fault indicates a configuration error. Unit is not al- lowed to start. Check all configuration data and set points and correct any errors.

Code 51 Initial configuration required

i2G7

This fault indicates factory configuration has not been done, and unit is not allowed to start. Refer to unit wiring label diagrams for factory configuration codes, There are 8 groups of S-digit numbers that must be entered. The first

4groups must be entered under s17ubafu n c t i o n . G r o u p s

7and 8 must be entered under MHs u b f u n c t i o n .

Enter each group, then press the H key. Use the

down arrow 0+ after each group to bring up the next

empty screen. Unit should start after factory and field con- figurations are correctly entered.

The usual cause of this fault is replacement of the pro- cessor module. Refer to instructions accompanying the re- placement module.

Code 52 Emergency stop by CCN command.

Unit goes through normal shutdown when this command is received, and goes through normal start-up when com- mand is cancelled.

S T A N D A R D : 040-060

50

H z

r - - - -

I - - - -

- -

040-070

60

H z

,

[CPCS

’ Sl

 

 

 

1 C R ’ S

 

 

 

 

 

 

 

LEGEND

S T A N D A R D :

070 50

Hz

 

 

 

Contactor

 

 

 

 

 

 

A C C E S S O R Y :

60

50

H z

&I

 

Circuit

Breaker

 

040-070

60

C O M M

 

Communications Bus

 

 

 

 

 

 

 

 

 

CPCS

 

Compressor Protection

 

 

 

 

 

 

Control

Module

 

 

 

 

CR

 

Compressor Contactor Relay

 

 

 

 

D G T

 

Discharge Gas Thermostat (Optional)

 

 

 

 

DSIO

 

Relay

Module (Low Voltage)

 

 

 

 

HPS

-

High-Pressure Switch

 

 

 

 

 

Low Vottage

 

 

 

 

K

 

Plug

 

 

 

 

 

PWR

 

Power

 

 

 

 

 

SNB

-

Snubber

 

 

 

 

TB

Terminal Block

 

 

 

 

TRAN

-

Transformer

 

 

 

 

U

-

Unloader

Fig. IOA - 24-V Safety Circuit Wiring (040-070)

52

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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 Steps060A\~**Hz Capacity Control Steps, 040-070 cantLoading Sequence a Loading Sequence B Unit Oy&ya Capacity Control Steps, 040-070 cantFBI 08Aqy,y AitiA4l&pi’ Steps BP’Loading Loading Sequence B Unit Control Altt Bitt Wtf2Z$’Altt Loading Sequence a Loading Equence B Unit’tt Amrox$-t&Z3 Loading Sequence a Quence B Unit Control Displacement Compressors UWrW Arwox A2.p $#l 110 50 HzAlt,Blv Loading Equence a Displacement Compressors MvroxEquence B Awrox Drt,t 130, 24OA130,24OA 130, 240AAttll’ Loading Equence a UnitT3g A2.pLoading 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 Capacity Control Steps, 225, 250,280 30GT Displacement Compressors AwoxLoac \IG Sequence a Loading Sequence B Unit Loac Capacity Control Steps, 225, 250,280 cant30GT 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 CodesExample 2 Reading Current Operating Modes Local on Cool Alarms Modes Local on M O D EKeypad Display Example 4 Reading and Changing Chilled Water Set Point Example 3 Using Test FunctionKeypad 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 FLD CFG Ertyp Lstyp Demand Keypad Display Entry ResponsePpiq Demand Limiting Example 8 Setting Time of Day Day of WeekMAX 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 Suction Refrigerant Temperature Sensor T7, T8 040-210Associated 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 1NO. of Accessory Standard and Accessory UnloadersCircuit 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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