Carrier 39L specifications Hcv, Ccv, Igv

Page 114

UNIT TROUBLESHOOTING (cont)

PROBLEM

POSSIBLE CAUSE

 

CORRECTIVE ACTION

 

No fan status

Check status of SFS (4 STAT). If supply fan status switch is

 

OFF, check switch for proper operation.

 

 

 

Mixed-air dampers forced closed to outside air

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

 

force and check operation.

 

 

 

 

Check for blown fuse (F7). Replace if necessary. If fuse is

 

No power to damper actuator

intact, check for proper connections. Check transformer

Mixed-air dampers

 

output.

will not operate

Incorrect reading from space temperature sensor

Check status of sensor readings for accuracy. Replace sen-

 

or supply-air temperature sensor

sors if defective.

 

 

Check con®guration for proper SMG and MDP (minimum

 

 

damper position). If MDP is set to zero, then dampers will

 

Con®guration error

stay closed when enthalpy is unsuitable. An improper SMG

 

can cause the MIXD to be held to the MDP setting. Check

 

 

 

 

for proper damper set point. If damper set point is forced to

 

 

incorrect value, remove force.

 

No fan status

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

 

fan status switch for proper operation.

 

 

 

Inlet guide vanes (IGVs) forced closed

Check status of IGV (5 STAT). If IGVs are forced, remove

 

force and check operation.

 

 

 

 

Check for blown fuse (F4). Replace if necessary. If fuse is

Unit not main-

No power to IGV actuator(s)

intact, check for proper connections. Check transformer for

taining desired

 

proper output.

static pressure

Loose IGV linkage

Check IGV linkage for tightness and proper adjustment.

(VAV units only)

 

 

 

 

Check status of sensor reading for accuracy. If reading is

 

 

 

Incorrect reading from static pressure transducer

in error, check for plugged sensing line and check sensor

 

 

calibration. Replace sensor if defective.

 

 

Check con®guration for proper static pressure set point.

 

Con®guration error

Also, check SMG. An improper SMG can cause the IGVs to

 

 

be held closed.

 

IGVs forced open

Check status of IGV (5 STAT). If IGVs are forced, remove

 

force and check operation.

 

 

 

High-Pressure Switch (HPS) is incorrectly set

Using squeeze bulb, check trip point of HPS. Adjust as re-

High-Pressure

or defective

quired. Check for plugged lines. Replace if defective.

Switch keeps

 

Using local interface device and squeeze bulb with gage,

tripping unit

Static pressure sensor reads incorrectly

verify static pressure reading is correct. Adjust or replace

OFF (VAV only)

 

sensor as required.

 

 

Check con®guration for proper static pressure set point.

 

Con®guration error

Check SMG. An improper SMG can cause the IGVs to be

 

 

held open.

 

 

Check fuses of speci®c actuator for function failure.

 

 

Fuses are as follows:

 

 

F1 Ð PSIO control module

 

 

F2

Ð Power

 

 

F3

Ð Cooling coil

 

 

F4 Ð IGVs Ð supply fan

 

 

F5 Ð DSIO or option module

 

No power, blown fuse

F6

Ð Heating coil

 

 

F7 Ð Mixed-air dampers

Individual

 

F8 Ð Smoke control or return-air damper

 

F9 Ð Exhaust-air damper

actuators

 

 

F10 Ð IGVs Ð return fan

do not function

 

 

F11 Ð 39NX sizes 74, 92; 2nd IGV actuator, supply fan

 

 

 

 

F12 Ð 39NX sizes 74, 92; 2nd IGV actuator, return fan

 

 

F13 Ð Preheat coil

 

Linkage is jammed or binding

Using manufacturer's instructions, correct and adjust

 

linkage. Check operation.

 

 

 

 

Using Quick Test and a voltage meter set to measure cur-

 

No control signal

rent, verify that the proper control signal (4 to 20 mA) is be-

 

ing sent to the actuator. Refer to wiring diagram for

 

 

 

 

appropriate terminals.

Oscillating

Incorrect submaster gain

Using Control Loop Checkout procedure, page 108, adjust

the SMG until the output steadies.

output

 

 

Verify sensor reading. If reading is ¯uctuating, determine

(HCV, CCV, IGV,

Input sensor is ¯uctuating (supply-air

cause (i.e., loose connections, partially plugged static pres-

MIXD, etc.)

temperature sensor, static pressure transducer)

sure sensing lines). Correct or replace sensor if necessary.

 

 

 

Loose connections

Verify all connections are secure.

 

 

Voltage type sensors (i.e., static pressure, space tempera-

Sensor

Sensor out of calibration

ture, outdoor-air temperature, return-air temperature, rela-

tive humidity, and velocity pressure) can be calibrated using

not reading

 

 

manufacturer's instructions.

correctly

 

 

If a sensor cannot be calibrated and its reading is consid-

 

 

 

Defective sensor

ered unacceptable, replace sensor. Once sensor is re-

 

 

placed, verify new sensor is reading correctly.

114

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Contents Installation, Operation, Start-Up Instructions ContentsSafety Considerations InstallationGeneral Page PIC ABXIGV VAVMXB Ð Mixing Box Direct ExpansionFMB Ð Filter Mixing Box Normally ClosedControl Box for Remote Mounting AQ1 AFSAotc AQ2PIC Section Control Box Component Arrangements, 39L PIC Section Control Box Component Arrangement, 39NX Sizes PIC Section Control Box Component Arrangement, 39NX Sizes Page Input and Output Points AddressUnit 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 Junction Box Connections for Optional Remote Control Box Terminal SignalValve Assembly Typical Hot Water Valve Wiring Chilled Water Valve Wiring Duct Static Pressure ProbeNema Ð National Electrical Manufacturers Association Resistance Temperature OhmsMixed-Air Temperature Sensor HH79NZ021 Installation Enthalpy Control Settings Supply/Return Air Temperature Sensor HH79NZ019COI L Comno Wall-Mounted Relative Humidity Sensor Fig Duct-Mounted Relative Humidity Sensor Locations Air¯ow Switch P/N HK06WC030 CGCDXSEN003A00 CO2 Sensor AccessoriesCGCDXSEN002A00 CGCDXGAS001A00Air Quality CO2 Sensor Wall Mount Version Shown CO2 Concentration PPMOAC Pressure Transducers Processor Recommended Sensor Device WiringManufacturer Part Number Sensor Module PIN noField Wiring of Sensors Recommended Actuators StrokeField-Supplied Mixing Box Actuator Signal Wiring Evacuation Supply Fan Contactor HAND/OFF/AUTO Switch Tran Ð TransformerHigh-Pressure Switch Remove Jumper 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 Pulse-Type Meter Wiring Control SystemCCN Communication Wiring Relay Module AHUAir Handling Unit Outdoor Air ThermostatLocal Interface Device Key Usage Function USE KeysOperative USE Keys SUB Function Number Status History Schedule Service Set Point TestFunctions and Subfunctions OavpControl Operation Operation Keyboard Display Description EntryKeyboard Directory StatusInputs VAV Direct Expansion Oavp Ð Outside Air Velocity Pressure AIRQUAL1 SET Point Quick Test History Example 1 Ð Reading Alarm Codes Example 2 Ð Reading Current Operating ModesKeyboard Display Comments Entry Response Force States AlarmsDisplay Codes Display DescriptionExample 4 Ð Forcing An Output Value State of Items ControlledExample 3 Ð Forcing An Input Value Relay StagesKeyboard Display Comments Entry Response To LOG on Example 5 Ð Using Quick TestExample 6 Ð Logging On and Logging Off Service Function To LOG OFFService Conguration Ranges and Defaults Analog Output Temperature Control Example 7 Ð Reading and Changing Factory Congurations Example 8 Ð Conguration of MeasurementsExample 9 Ð User Congurations Example 11 Ð Conguration of Space Temperature Reset Example 10 Ð Conguration of Heating CoilExample 12 Ð Conguration of Loadshed Example 14 Ð Conguration of Alarm Limits Example 15 Ð Conguration of Analog Temperature ControlExample 13 Ð Conguration of Fan Tracking Example 18 Ð Service/Maintenance Alarm Conguration Example 16 Ð Conguration of Discrete Temperature ControlExample 17 Ð Service History Conguration Set Point Ranges and DefaultsExample 21 Ð Setting of Time and Date Example 22 Ð Setting Daylight Savings TimeExample 20 Ð Reading and Changing System Set Points Example 23 Ð Setting of Holidays Schedule I Sample Time ScheduleExample 24 Ð Using the Schedule Function Keyboard Display Comment Entry Response Programming PeriodPeriod 1 Dene schedule period For this example, Period 6 is used for holiday only Constant Volume and Variable Air Volume Units Control Operating SequencePage Page IAQ MAT Ð Mixed-Air TemperatureOAT Ð Outdoor-Air Temperature Indoor-Air QualityConstant Volume Units Only CCV Ð Cooling Coil Valve RAT Ð Return-AirDX Submaster Gain Control Operation Variable Air Volume Units Only Page Constant Outside Air Outside AirOAC Oavp Ð Outside Air Velocity Pressure102 START-UP Initial CheckTest of Input Signals Keyboard Display COMMENTS/ACTION Entry ResponseKeyboard Display COMMENTS/ACTION Entry Response FSD NRM FollowingTest of Output Signals For Variable Air Volume UnitsTest of Output Options Using Option Module Electric Heater TestDigital DC Volt Meter vs DC Milliamp Meter Control Loop CheckoutDirect Expansion DX Cooling Test DC Milliamps DC VoltageValve Troubleshooting Recommended Gain Starting ValvesIGV % Typical LinkagesExample 25 Ð Forcing An Output HCV 10/FORCEDControl Module Troubleshooting Example 26 Ð Heating Coil Valve Test Way Normally OpenExit Test Dsio Unit Troubleshooting Problem Possible Cause Corrective ActionHCV, CCV, IGV IAQ features OAC malfunctioningMalfunctioning 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.

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