Carrier 39L Example 1 Ð Reading Alarm Codes, Example 2 Ð Reading Current Operating Modes

Page 78

STATUS FUNCTION Ð The status function shows the cur- rent status of alarm (diagnostic) codes, operating modes, set points, all measured system temperatures, output values, and input values. These subfunctions are de®ned on pages 78-80. Refer to Table 11 for additional information.

(Alarms) Ð Alarms are messages that one or more

faults have been detected. Each fault is assigned a code num- ber which is reported with the alarm. (See Table 14 for code de®nitions.) The codes indicate failures that cause the unit to shut down, terminate an option (such as reset), or result in the use of a default value as the set point.

Up to 32 alarm codes can be stored at once. To view

them in numerical sequence, press

to enter the

alarm display and then press to move to the individual

alarm displays. Press after a code has been displayed

and the meaning of the code will scroll across the screen. See Example 1.

If an input or output point which has generated an alarm resets (returns to a range within its limits), the alarm code is deleted from the list.

A historical sequence of the last 9 alarms can be found

using the key. See Display Functions, History Func-

tion section for more details.

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

(Modes) Ð The operating mode codes are dis-

played to indicate the current operating status of the unit. (See Table 14)

To enter the MODES subfunction, press and use

the

key to determine if more than one mode applies.

See Example 2 to read current mode with expansion.

Example 1 Ð Reading Alarm Codes

KEYBOARD

DISPLAY

COMMENTS

ENTRY

RESPONSE

 

 

TUE 12:45

Keyboard has not been used for

 

MODE 23

at least 10 minutes; alternating

 

summary display appears on

 

3 ALARMS

 

screen

 

3 ALARMS

3 alarms detected

 

ALARM 71

First alarm code

 

SPACE

Explanation of alarm code

 

TEMPERATURE

 

LOW LIMIT

 

 

ALARM 76

Second alarm code

 

RETURN AIR

Explanation of alarm code

 

TEMPERATURE

 

HIGH LIMIT

 

 

ALARM 83

Third alarm code

 

RELATIVE

 

 

HUMIDITY

Explanation of alarm code

 

LOW LIMIT

 

The modes are explained below:

Temperature Reset (21) Ð Indicates that the unit is using temperature reset to adjust the supply-air set point. The set point is modi®ed based on space temperature (VAV units only). Unit must be con®gured for space temperature

reset ( ). (This mode is enabled by .)

Demand Limit (22) Ð On CV (constant volume) units, this mode indicates that the fan is being held off by the De- mand Limit option. On VAV units, it indicates that the max- imum IGV position is being limited by the Demand Limit option. Units must be con®gured for demand limiting

( ). This mode is enabled by , and is only

available on units connected to the Carrier Comfort Network (CCN).

Unoccupied Heating (23) Ð Indicates that the space tem- perature is below the Unoccupied Heating set point and the unit is on. When the space temperature rises above the set point the unit is turned off.

Unoccupied Cooling (24) Ð Indicates that the space tem- perature is above the Unoccupied Cooling set point and the unit is on. When the space temperature falls below the set point the unit is turned off.

Optimal Start (26) Ð Indicates that the unit is operating in the Optimal Start mode and is trying to achieve the Occupied set point. On VAV units this is referred to as morn- ing warm-up. Unit must be con®gured for optimal start

( ). This mode is enabled by .)

Unoccupied Mode (27) Ð Indicates that the unit is in the Unoccupied mode as determined by its time schedule. In this mode the unit is turned off.

Optimal Stop (29) Ð Indicates that the unit is being con- trolled to its expanded Occupied set points. The space tem- perature is allowed to drift to its expanded Occupied set points during the last portion of the Occupied period.

Unit must be con®gured for Optimal Start ( ). Optimal Stop mode is only applicable to CV units.

Occupied Heating (30) Ð Indicates that the unit is in the Heating mode to satisfy its Occupied Heating set point.

Units must be con®gured for Occupied Heating

( ).

Occupied Heating is available on VAV units only.

Example 2 Ð Reading Current Operating Modes

KEYBOARD

DISPLAY

COMMENTS

ENTRY

RESPONSE

 

 

TUE 12:45

Keyboard has not been

 

MODE 31

used for at least 10 min-

 

 

utes; alternating summary

 

 

display appears on screen.

 

MODE

Modes subfunction of

 

status function

 

 

 

MODE 31

Mode 31 is in effect

 

OCCUPIED COOLING

Explanation of code 31

 

MODE 22

Mode 22 is in effect

 

DEMAND LIMIT

Explanation of code 22

 

 

 

NOTE: The ®rst mode is the primary operating mode. The second mode is the secondary operating mode, if applicable.

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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

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