Carrier 30GN040-420 operating instructions COM, Comm, Dgt, Dsio, Hps, Pwr, Snb, Tran

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LEGEND

C

Ð Contactor

CB

Ð Circuit Breaker

COM, COMM

Ð

Communications Bus

CPCS

Ð

Compressor Protection

 

 

Control Module

CR

Ð Compressor Contactor Relay

DGT

Ð Discharge Gas Thermostat (Optional)

DSIO

Ð Relay Module (Low Voltage)

HPS

Ð

High-Pressure Switch

LV

Ð

Low Voltage

NC

Ð Normally Closed

NO

Ð Normally Open

PL

Ð

Plug

PWR

Ð Power

SNB

Ð

Snubber

TB

Ð

Terminal Block

TRAN

Ð

Transformer

U

Ð Unloader

Fig. 11A Ð 24-V Safety Circuit Wiring (040-070)

Code 21 Reset thermistor failure (applies only to installa- tions having external temperature reset) (alert)

If temperature measured by this thermistor is outside range of ±40 to 240 F (±40 to 116 C), reset function is disabled and unit controls to normal set point. If temperature returns to the acceptable range, reset function is automatically en- abled. The cause of this fault is usually a bad thermistor, wiring error, or loose connection.

Code 22 Compressor A1 discharge pressure transducer failure (alert)

Code 23 Compressor B1 discharge pressure transducer failure (alert)

Code 24 Compressor A1 suction pressure transducer failure (alert)

Code 25 Compressor B1 suction pressure transducer failure (alert)

Code 27 Compressor B1 oil pressure transducer failure (alert)

If output voltage of any of these transducers is greater than 5 v, affected circuit shuts down without going through pum- pout process (Alerts 24-27). Other circuit continues to run. Reset is automatic if output voltage returns to the acceptable range, and circuit start-up follows normal sequence. The cause of this fault is usually a bad transducer or a wiring error.

Code 28 Low transducer supply voltage (alarm)

If transducer supply voltage is less than 4.5 v or greater than 5.5 v, unit shuts down without going through pumpout process. Reset is automatic if supply voltage returns to the acceptable range, and circuit start-up follows normal se- quence. The cause of this fault is usually a faulty trans- former or primary voltage is out of range.

Code 26 Compressor A1 oil pressure transducer failure (alert)

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Contents Controls, Operation, Troubleshooting Unit Sizes and Modular Combinations Unit Model Nominal Section a Section BTons Unit 30GN 30GN Control Panel 040-110 Unit Shown Stop LOCAL/ENABLE-STOP-CCN Switch Positions and OperationLOCAL/ENABLE Keypad and Display Module Also Called HsioPressure Transducers Compressor Protection Control Module CpcsThermistor and Transducer Locations ThermistorsÐ Capacity Control Steps Loading Sequence a Loading Sequence B Unit ControlSteps Ð Capacity Control Steps, 040-070 Ð Capacity Control Steps, 040-070 A1²**,B1² Displacement Compressors Approx 080, 230B 60 HzA1²,B1² A1²**, B1²Compressors Displacement 090, 245B 60 Hz090, 245B 50 Hz 270B 60 Hz 100, 255B270B 50 Hz Unit Control Loading Sequence a Loading Sequence B110, 290B 315B 60 Hz315B 50 Hz A1*,A2,B1 A1,A2,B1 A1²²,A2,B1,B2 A1*,A2,B1,B2 130 60 Hz 150, 230A, 245A 130 50 HzA1,kB1 330A/B 60 Hz 170, 270A330A/B,360B 50 Hz 330A/B, 360B 50 Hz A1**,B1 Approx 190, 290A, 360A/B390B 60 Hz A1,B1420A/B 60 Hz 210, 315A, 390A420A/B 50 Hz Pumpout Head Pressure ControlFAN Arrangement FAN Numbers FAN Contactor Controlled by Condenser Fan SequenceOperative USE Keys Keypad and Display Module UsageFunctions and Subfunctions Function USE KeysKeypad Directory Accessing Functions and SubfunctionsSET Point TemperatureKeypad Directory Status Subfunction Keypad Entry Display Comment StageOutputs Subfunction Keypad Entry Display Comment PressureAnalog InputsUnloaders CPA1 Subfunction Keypad Entry Display CommentSubfunction Keypad Entry Display Comment Outputs Subfunction Keypad Entry Display Comment CompressorsKeypad Directory Test Keypad Directory Schedule Subfunction Keypad Entry Display Comment Factory Keypad Directory ServiceConfiguration ServiceHISTORY²² ALARM/ALERTSubfunction Keypad Entry Display Comment RUN Time StartsDate and Time Reset SET PointsSubfunction Keypad Entry Display Comment SET Points Demand SET PointsExample 1 Ð Reading Alarm Codes Example 2 Ð Reading Current Operating ModesKeypad Display Comments Entry Response Operational and Mode Display Codes Reset Set Points Example 3 Ð Using Test FunctionMeasurement Method Input Data Description Example 5A Ð External ResetReset Amounts Example 4 Ð Reading and Changing Chilled Fluid Set PointKeypad Display Comments Entry Response Example 5C Ð Using Return Fluid Temperature ResetPWR PowerSwitch Comm Ð Communications BusLoggedon Service FunctionsPassword SUB Keypad Display CommentExample 8 Ð Setting Time of Day Day of Week To Disable Demand Limit4-20 mA Demand Limiting Factory Conguration Keystrokes Adjustable Field CongurationsKeypad Display Comment Entry Programming Period Example 9 Ð Using the Schedule FunctionKeypad Display Comment Entry Programming PeriodEnter Display Example 10 Ð Holiday Schedule FunctionStop position. Unit cannot start if these contacts are Typical Stoppage Faults and Reset TypesLOCAL/ENABLE-STOP-CCN Alarm and Alert CodesCpcs FSMWSM HPS COM, CommDGT DsioComm CGF Subfunction. Groups Electronic Expansion Valve EXV EXV Cable Connections to EXV Driver Module, Dsio EXV Thermistor Replacement T1, T2, T7, T8 Temperature Voltage Resistance Drop Ohms Temperature Voltage Resistance Drop Thermistor and Pressure Transducer Locations Thermistor Locations Circuits a and B, Lead Compressor Only Lead Compressor Transducer and Thermistor Locations Control Modules Module Address Selector Switch LocationsAccessory Unloader Installation 4 In/4 Out Module SIO InstallationStandard and Accessory Unloaders TroubleshootingPage COM Or HGBPR-A²Or HGBPR-B Hgbpr ÐTB Ð Terminal Block Externally PoweredOutdoor-Air Temperature CWP Ð Chilled Water Fluid PumpInterlocks Remote AlarmPage Copyright 1995 Carrier Corporation

30GN040-420 specifications

The Carrier 30GN040-420 is a well-regarded model within the industry of chillers, designed to deliver efficient cooling solutions for a variety of commercial applications. Its compact design and advanced technology make it an ideal choice for businesses looking to optimize their HVAC systems.

One of the standout features of the Carrier 30GN series is its flexibility. This chiller model is available in a range of capacities, specifically from 40 to 420 tons, allowing for customized solutions based on specific cooling demands. Such versatility enables this unit to cater to a broad array of installations, from small commercial spaces to larger industrial facilities.

The Carrier 30GN040-420 utilizes a scroll compressor design, known for its reliability and efficiency. The scroll technology allows for a reduction in the number of moving parts, resulting in lower maintenance costs and increased durability. Additionally, the unit operates with environmentally friendly refrigerants such as R-410A, promoting sustainability without compromising performance.

Energy efficiency is another significant aspect of this model. The 30GN series is designed to provide high energy efficiency ratios (EER), which translates to lower operational costs for users over the lifespan of the unit. This is particularly beneficial in an era where energy costs are consistently rising.

The advanced controls found within the Carrier 30GN040-420 further enhance its performance and ease of use. The unit is equipped with a microprocessor-based control system that allows for precise temperature management while providing valuable diagnostic information. This feature not only improves the overall reliability of the system but also facilitates proactive maintenance, reducing the risk of unscheduled downtime.

Moreover, the design of the Carrier 30GN040-420 emphasizes quiet operation, making it suitable for environments where noise levels must be minimized. This characteristic is critical for applications in hospitals, schools, or office buildings, where a peaceful atmosphere is essential.

In summary, the Carrier 30GN040-420 chiller provides a robust solution for businesses requiring dependable and efficient cooling. Its features, including flexible capacity options, reliable scroll compressors, energy-efficient performance, advanced controls, and quiet operation, position it as a top choice for various commercial and industrial applications. As technology continues to evolve, models such as the 30GN series remain at the forefront, meeting the demands of modern HVAC needs while ensuring sustainability and efficiency.
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