Ð Displays the latest service date on the local in-

terface device. The last 2 service dates are displayed at the Building Supervisor.

TEST FUNCTION Ð The test function operates the Quick Test diagnostic program.

Ð Displays the status of all inputs.

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

Ð Tests the outputs.

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

Ð Tests the electric heaters. Unit must be con®g-

ured for electric heat to access this subfunction. See Example 5.

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

Ð Tests the stages of direct expansion (DX) cool-

ing. Unit must be con®gured for DX cooling to access this subfunction.

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

Ð Takes the unit out of Quick Test.

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

NOTE: The unit must not be operating during the Quick Test function. Set HOA switch to OFF and follow the test pro- cedure. Set HOA switch to AUTO only as required during testing.

To reach a particular test, enter its subfunction number

and then scroll to the desired test by pressing

. A test

can be terminated by pressing

; pressing

after a test

has started terminates the current test and advances the sys- tem to the next test. Once in the next step, you may start

the test by pressing

, advance past it by pressing

, or

back up by pressing

 

. When testing is complete, exit the

Quick Test by pressing

and then

; this MUST

be done to restore the unit software to automatic control. If the keyboard is not used for 10 minutes, the display

returns to the rotating default display.

Press

and

to exit Quick Test and then press

to restart the test

procedure.

 

 

Example 5 Ð Using Quick Test

KEYBOARD

DISPLAY

COMMENTS

ENTRY

RESPONSE

 

 

ELEC HT

Factory test of electric heat

 

subfunction of test function

 

 

 

EHS1

Stage 1 test

 

STG1 TST

Pressing ENTR starts the fan test.

 

 

Fan automatically starts. There is an

 

 

11-second delay while the inlet

 

 

guide vanes open and the heat stage

 

 

is enabled. When the electric heat

 

 

stage should be running, the display

 

 

shows EHS ON. Test remains on

 

 

until another key is pressed

 

EHS2

Pressing the down arrow key

 

 

advances the system to stage 2 test.

 

 

Any stage may be selected. Press

 

 

the key until the desired stage is

 

 

displayed, then press ENTR to start

 

 

the test

 

EXIT TST

If no other test is desired, exit Quick

 

 

Test. Fan shuts off, last electric heat

 

 

stage shuts off, and IGVs close

 

TST CMPL

Test is completed. Unit resumes

 

automatic control

 

 

Programming Functions

SERVICE FUNCTION Ð The service function allows the operator to verify or change factory and ®eld con®gu- rations. The service subfunctions are listed below. (See Table 13 for details.) Refer to Table 16 for con®guration value ranges and defaults.

Ð Use this subfunction to log on before perform-

ing any subfunction in Factory Con®gurations ( ),

and to log off after completing service subfunctions. See Example 6.

Example 6 Ð Logging On and Logging Off

Service Function

KEYBOARD

DISPLAY

COMMENTS

ENTRY

RESPONSE

 

TO LOG ON:

 

 

 

LOG ON

Ready for password to be

 

entered

 

 

 

LOGGEDON

Operator can now use

 

 

service functions

TO LOG OFF:

 

 

 

LOG OFF

Ready for operator to log off

 

LOGD OFF

Logged off Ð password

 

protection enabled

 

 

81

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Image 81
Carrier 39L Example 5 Ð Using Quick Test, Example 6 Ð Logging On and Logging Off Service Function, To LOG OFF

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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