Carrier 39L specifications Unit Troubleshooting, Problem Possible Cause Corrective Action

Page 113

UNIT TROUBLESHOOTING

PROBLEM

POSSIBLE CAUSE

CORRECTIVE ACTION

 

PIC control is OFF

Check for correct power or blown fuses (F2).

 

Correct any de®ciencies.

 

 

 

 

Check LEDs on control module (PSIO). If LED is not solidly

 

Faulty connections

illuminated, check for loose connections. If all wires and

 

connectors are secure, replace PSIO module as described

 

 

 

 

on page 112.

 

PIC control has incorrect time

Verify control shows correct time. If incorrect, enter correct

 

time.

 

 

 

Supply fan HOA switch in OFF position

Verify HOA switch is in the AUTO position.

 

Check low-temperature thermostat and high-pressure switch

Unit does not run

Safety controls are tripped

(VAV units only). Reset switches if necessary.

 

 

 

PIC control left in Quick Test

Using the local interface device, exit Quick Test.

 

(Display shows Mode 38)

Press 5 TEST, and then ENTR to exit.

 

Unit is con®gured for and is currently

Verify that unit should be in the Demand Limit mode. If not,

 

cycle power to PIC to release unit from Demand Limit

 

in Demand Limit Mode (CV units only)

 

mode.

 

 

 

Unit is in Smoke Evacuation or Fire Shut-

Verify that unit should be in one of these modes. If not,

 

down mode (Display shows 35 or 37)

check for shorted input on Fire Shutdown or Evacuation.

 

Minimum inverter set point too low

Adjust minimum to 20% at 4 mA signal and 100% at 20 mA

 

(VAV units only)

signal.

 

 

Check status of SFS (4 STAT). If SFS is OFF, check supply

 

No fan status

fan status switch for proper operation. Switch must be ON

 

 

for heat coil to function properly.

 

Heat coil valve (HCV) is forced closed

Check status of HCV (5 STAT). If HCV is forced, remove

 

force and check operation.

 

 

 

NO hot water or steam available,

Check source and correct any problems found.

 

no power if electric heat

 

 

 

Electric heater safety tripped

Reset heater safety. Check for proper operation.

 

 

Check for blown fuse (F6). Replace if necessary. If fuse

No heat

No power to valve

is intact, check for proper connections. Check transformer

 

output.

 

 

 

 

Check for blown fuse (F5). Replace if necessary. If fuse

 

No power to electric heater control

is intact, check for proper connections. Check transformer

 

 

output.

 

Incorrect reading from space temperature sensor,

Check status of sensor readings for accuracy.

 

supply-air temperature sensor, or return-air

 

Replace sensor if defective.

 

temperature sensor (VAV units)

 

 

 

 

Check con®guration for proper heating set point and

 

Con®guration error

Submaster Gain (SMG). An improper SMG can cause the

 

 

heating valve to be held closed.

 

Heat coil valve (HCV) is forced open

Check status of HCV (5 STAT). If HCV is forced, remove

 

force and check operation.

 

 

 

Incorrect reading from space temperature sensor,

Check status of sensor readings for accuracy. Replace

Overheating

supply-air temperature sensor, or return-air

sensor if defective.

temperature sensor (VAV units)

 

 

 

 

Check con®guration for proper heating set point and

 

Con®guration error

Submaster Gain (SMG). An improper SMG can cause the

 

 

heating valve to be held open.

 

 

Check status of SFS (4 STAT). If status is OFF, check

 

No fan status

switch for proper operation. Supply fan status switch must

 

 

be ON for cooling coil to function properly.

 

Cooling coil valve (CCV) is forced closed

Check status of CCV (5 STAT). If CCV is forced, remove

 

force and check operation.

 

 

 

No chilled water available

Check source of chilled water. Correct any problems found.

No cooling

 

Check for blown fuse (F3). Replace if necessary. If fuse

No power to cooling coil valve

is intact, check for proper connections. Check transformer

 

 

output.

 

Incorrect reading from space temperature sensor,

Check status of sensor readings for accuracy. Replace

 

supply-air temperature sensor, or return-air

 

sensor if defective.

 

temperature sensor (VAV units)

 

 

 

 

Check con®guration for proper cooling set point and

 

Con®guration error

Submaster Gain (SMG). An improper SMG can cause the

 

 

CCV to be held closed.

 

Cooling coil valve (CCV) is forced open

Check status of CCV (5 STAT). If CCV is forced, remove

 

force and check operation.

 

 

 

Incorrect reading from space temperature sensor,

Check status of sensor readings for accuracy. Replace

Overcooling

supply-air temperature sensor, or return-air

sensor if defective.

temperature sensor (VAV units)

 

 

 

 

Check con®guration for proper cooling set point and

 

Con®guration error

Submaster Gain (SMG). An improper SMG can cause the

 

 

CCV to be held open.

LEGEND

 

 

CV Ð Constant Volume

 

VAV Ð Variable Air Volume

 

113

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Contents Contents Installation, Operation, Start-Up InstructionsGeneral Safety ConsiderationsInstallation Page IGV ABXPIC VAVFMB Ð Filter Mixing Box Direct ExpansionMXB Ð Mixing Box Normally ClosedControl Box for Remote Mounting Aotc AFSAQ1 AQ2PIC Section Control Box Component Arrangements, 39L PIC Section Control Box Component Arrangement, 39NX Sizes PIC Section Control Box Component Arrangement, 39NX Sizes Page Address Input and Output PointsUnit Wiring Schematic, 39L Sizes 03-35 115 v, Typical Unit Wiring Schematic, 39L Sizes 03-35 115 v, Typical Unit Wiring Schematic, 39L Sizes 03-35 115 v, Typical Unit Wiring Schematic, 39L Sizes 03-35 115 v, Typical Unit Wiring Schematic, 39L Sizes 03-35 115 v, Typical Unit Wiring Schematic, 39L Sizes 03-35 115 v, Typical Unit Wiring Schematic, 39NX Sizes 07-21 115 v, Typical Unit Wiring Schematic, 39NX Sizes 07-21 115 v, Typical Unit Wiring Schematic, 39NX Sizes 07-21 115 v, Typical Unit Wiring Schematic, 39NX Sizes 07-21 115 v, Typical Unit Wiring Schematic, 39NX Sizes 07-21 115 v, Typical Unit Wiring Schematic, 39NX Sizes 07-21 115 v, Typical Unit Wiring Schematic, 39NX Sizes 26-92 115 v, Typical Unit Wiring Schematic, 39NX Sizes 26-92 115 v, Typical Unit Wiring Schematic, 39NX Sizes 26-92 115 v, Typical Unit Wiring Schematic, 39NX Sizes 26-92 115 v, Typical Unit Wiring Schematic, 39NX Sizes 26-92 115 v, Typical Unit Wiring Schematic, 39NX Sizes 26-92 115 v, Typical Page Page Page Page Page Page Terminal Signal Junction Box Connections for Optional Remote Control BoxValve Assembly Typical Hot Water Valve Wiring Duct Static Pressure Probe Chilled Water Valve WiringNema Ð National Electrical Manufacturers Association Ohms Resistance TemperatureMixed-Air Temperature Sensor HH79NZ021 Installation Supply/Return Air Temperature Sensor HH79NZ019 Enthalpy Control SettingsCOI L Comno Wall-Mounted Relative Humidity Sensor Fig Duct-Mounted Relative Humidity Sensor Locations Air¯ow Switch P/N HK06WC030 CGCDXSEN002A00 CO2 Sensor AccessoriesCGCDXSEN003A00 CGCDXGAS001A00CO2 Concentration PPM Air Quality CO2 Sensor Wall Mount Version ShownOAC Pressure Transducers Manufacturer Part Number Recommended Sensor Device WiringProcessor Sensor Module PIN noField Wiring of Sensors Stroke Recommended ActuatorsField-Supplied Mixing Box Actuator Signal Wiring High-Pressure Switch Remove Jumper HAND/OFF/AUTO Switch Tran Ð TransformerEvacuation Supply Fan Contactor Fire Shut Down Terminal BlockPres Single-Pole, Double-Throw Spdt Relay Wiring of Device Under Discrete Output Temperature Control Wiring of Two-Stage Humidication Control Relays Duct Mounted Relative Humidity Transmitter Wiring Air Quality and Oavp Sensor Wiring Wiring of Return Fan Volume Control With IGVs Control System Pulse-Type Meter WiringCCN Communication Wiring Air Handling Unit AHURelay Module Outdoor Air ThermostatOperative USE Keys Local Interface Device Key UsageFunction USE Keys Functions and Subfunctions Status History Schedule Service Set Point TestSUB Function Number OavpOperation Keyboard Display Description Entry Control OperationStatus Keyboard DirectoryInputs VAV Direct Expansion Oavp Ð Outside Air Velocity Pressure AIRQUAL1 SET Point Quick Test History Keyboard Display Comments Entry Response Example 1 Ð Reading Alarm CodesExample 2 Ð Reading Current Operating Modes Display Codes AlarmsForce States Display DescriptionExample 3 Ð Forcing An Input Value State of Items ControlledExample 4 Ð Forcing An Output Value Relay StagesExample 6 Ð Logging On and Logging Off Service Function Example 5 Ð Using Quick TestKeyboard Display Comments Entry Response To LOG on To LOG OFFService Conguration Ranges and Defaults Analog Output Temperature Control Example 9 Ð User Congurations Example 7 Ð Reading and Changing Factory CongurationsExample 8 Ð Conguration of Measurements Example 12 Ð Conguration of Loadshed Example 11 Ð Conguration of Space Temperature ResetExample 10 Ð Conguration of Heating Coil Example 13 Ð Conguration of Fan Tracking Example 14 Ð Conguration of Alarm LimitsExample 15 Ð Conguration of Analog Temperature Control Example 17 Ð Service History Conguration Example 16 Ð Conguration of Discrete Temperature ControlExample 18 Ð Service/Maintenance Alarm Conguration Set Point Ranges and DefaultsExample 20 Ð Reading and Changing System Set Points Example 21 Ð Setting of Time and DateExample 22 Ð Setting Daylight Savings Time Schedule I Sample Time Schedule Example 23 Ð Setting of HolidaysPeriod 1 Dene schedule period Example 24 Ð Using the Schedule FunctionKeyboard Display Comment Entry Response Programming Period For this example, Period 6 is used for holiday only Control Operating Sequence Constant Volume and Variable Air Volume UnitsPage Page OAT Ð Outdoor-Air Temperature MAT Ð Mixed-Air TemperatureIAQ Indoor-Air QualityConstant Volume Units Only RAT Ð Return-Air CCV Ð Cooling Coil ValveDX Submaster Gain Control Operation Variable Air Volume Units Only Page OAC Outside AirConstant Outside Air Oavp Ð Outside Air Velocity Pressure102 Initial Check START-UPKeyboard Display COMMENTS/ACTION Entry Response Test of Input SignalsFollowing Keyboard Display COMMENTS/ACTION Entry Response FSD NRMFor Variable Air Volume Units Test of Output SignalsElectric Heater Test Test of Output Options Using Option ModuleDirect Expansion DX Cooling Test Control Loop CheckoutDigital DC Volt Meter vs DC Milliamp Meter DC Milliamps DC VoltageRecommended Gain Starting Valves Valve TroubleshootingExample 25 Ð Forcing An Output Typical LinkagesIGV % HCV 10/FORCEDExit Test Control Module TroubleshootingExample 26 Ð Heating Coil Valve Test Way Normally Open Dsio Problem Possible Cause Corrective Action Unit TroubleshootingHCV, CCV, IGV Malfunctioning IAQ featuresOAC malfunctioning Metric Conversion Chart

39L specifications

The Carrier 39L is a cutting-edge air conditioning unit designed for both residential and commercial applications, providing exceptional cooling and heating performance. Equipped with advanced technologies, this system ensures optimal climate control while maintaining energy efficiency.

One of the standout features of the Carrier 39L is its inverter technology. This innovation allows the system to adjust its compressor speed based on the ambient temperature, which results in a significant reduction in energy consumption. By operating at varying capacities rather than a fixed output, the 39L can maintain a consistent temperature, enhancing comfort while lowering electricity bills.

The Carrier 39L also includes a high-efficiency air filtration system, designed to capture dust, allergens, and other airborne particles. This not only improves indoor air quality but also promotes a healthier living environment. The filtration system is complemented by anti-bacterial treatment, ensuring that the air circulated within your space is both clean and refreshing.

In terms of design, the Carrier 39L boasts a sleek and compact form factor, making it easy to integrate into various settings, from homes to offices. Its quiet operation is another notable feature, as it minimizes noise levels, allowing occupants to enjoy a serene atmosphere without disruptive sound.

Further enhancing convenience, the Carrier 39L comes equipped with smart connectivity options. Users can control the unit remotely via a smartphone app, making it easy to adjust settings, program schedules, and monitor energy usage from anywhere. This feature not only improves user experience but also supports energy-saving practices.

Durability is also a key characteristic of the Carrier 39L. Constructed with high-quality materials and coated with corrosion-resistant treatments, the unit is built to withstand various environmental conditions. This ensures long-lasting performance and reduces the need for frequent maintenance.

Overall, the Carrier 39L is a versatile, efficient, and user-friendly air conditioning solution. Its blend of advanced technologies, energy-saving capabilities, and robust design makes it an ideal choice for those seeking reliable climate control in their spaces. Whether for residential comfort or commercial necessity, the Carrier 39L stands out as a leader in modern air conditioning.
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