Carrier 39L - Manual (Page 81)

— Displays the latest service date on the local in-
terface device. The last 2 service dates are displayed at the
Building Supervisor.
TEST FUNCTION — The test function operates the Quick
Test diagnostic program.
— Displays the status of all inputs.
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— Tests the outputs.
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— Tests the electric heaters. Unit must be config-
ured for electric heat to access this subfunction. See
Example 5.
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— Tests the stages of direct expansion (DX) cool-
ing. Unit must be configured for DX cooling to access this
subfunction.
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— Takes the unit out of Quick Test.
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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 — Using Quick Test
KEYBOARD
ENTRY
DISPLAY
RESPONSE
COMMENTS
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 — The service function allows
the operator to verify or change factory and field configu-
rations. The service subfunctions are listed below. (See
Table 13 for details.) Refer to Table 16 for configuration value
ranges and defaults.
— Use this subfunction to log on before perform-
ing any subfunction in Factory Configurations ( ),
and to log off after completing service subfunctions. See
Example 6.
Example 6 — Logging On and Logging Off
Service Function
KEYBOARD
ENTRY
DISPLAY
RESPONSE
COMMENTS
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 — password
protection enabled
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