![background image](http://html1.mh-extra.com/html/carrier/69nt40-541-304/69nt40-541-304_operation-service-and-parts-supplement_2563842040.webp)
T-319
3–6
Some alarms requiring compressor shutdown have time delays before and after to try to keep the compressor on
line. An example is alarm code “LO”, (low main voltage). When a voltage drop of over 25% occurs, an indication is
given on the display, but the unit will continue to run.
An alarm is indicated by flashing an alarm code on the display panel, and for some alarms, by the alarm light illumi-
nating.
When an Alarm Occurs:
1. The red alarm light will illuminate for AL04.
2. If a detectable problem is found to exist, its alarm code will be alternately displayed with the set point on the
left display.
3. The user should scroll through the alarm list to determine what alarms exist or have existed. Alarms must be
diagnosed and corrected before the Alarm List can be cleared.
To Display Alarm Codes:
1. Press the ALT. MODE key once, and using Arrow keys, scroll though the DataCORDER menu until “rAL” is
displayed in the left display window.
2. Press Enter. The rAL will display the individual component alarm that triggered the AL04.
Alarm codes specific to the dual temperature system are located in
. Pre-trip tests and test codes for the
general unit are provided in the Operation and Service Manual for 69NT40-541-300 to 399 series units.
3.4
UNIT PRE-TRIP DIAGNOSTICS
Pre-Trip diagnostics is an independent controller function that will suspend normal refrigeration controller activities
and provide preprogrammed test routines. The test routines include auto mode testing, which automatically pre-
forms a pre-programmed sequenced of tests or manual mode testing, which allows the operator to select and run
any of the individual tests.
CAUTION
!
Pre-Trip inspection should not be performed with critical temperature cargoes in the container.
CAUTION
!
When the Pre-Trip key is pressed, dehumidification and bulb mode will be deactivated. At the
completion of Pre-Trip activity, dehumidification and bulb mode must be reactivated.
NOTE
It is recommended for the container to be partitioned during pre-trip diagnostics.
Testing may be initiated using either the keypad or via communication. When testing is initiated by communication,
the controller will execute the entire battery of tests (auto mode). Pre-trips perform diagnostic checks on main com-
ponents of the remote compartment when Code 52 is active.
At the end of a pre-trip test, the message “P,” “rSLts” (pretest results) will be displayed. Press the ENTER key to see
the results for all sub-tests. The results will be displayed as either “PASS” or “FAIL” for all the tests run to completion.
Pre-trip tests and test codes specific to the dual temperature system are located in
codes for the general unit are provided in the Operation and Service Manual for 69NT40-541-300 to 399 series units.
Summary of Contents for 69NT40-541-304
Page 2: ......
Page 4: ......
Page 8: ...T 319 iv...
Page 14: ...T 319 1 4...
Page 34: ...T 319 2 20...
Page 48: ...T 319 5 2...
Page 61: ...7 3 T 319 Figure 7 2 Schematic 69NT40 541 304...
Page 62: ...T 319 7 4 Figure 7 3 Unit Wiring Diagram Sheet 1 69NT40 541 304...
Page 63: ...7 5 T 319 Figure 7 4 Unit Wiring Diagram Sheet 2 69NT40 541 304...
Page 64: ...T 319 7 6 Figure 7 5 Legend 69NT40 541 345...
Page 65: ...7 7 T 319 Figure 7 6 Schematic 69NT40 541 345...
Page 66: ...T 319 7 8 Figure 7 7 Unit Wiring Diagram Sheet 1 69NT40 541 345...
Page 67: ...7 9 T 319 Figure 7 8 Unit Wiring Diagram Sheet 2 69NT40 541 345...
Page 68: ...T 319 7 10...
Page 77: ...12 4 T 319...
Page 78: ...T 319 13 1 13 RECEIVER 8 5 17 18 19 20 4 Item 1 4 2 3 6 7 8 6 7 10 9 11 12 13 14 15 16 2...
Page 81: ...14 2 T 319...
Page 84: ...T 319 17 1 17 REMOTE EVAPORATOR FRAME A A A A 4 2 5 6 3 8 9 1 15 11 7 12 10 14 13 2 2 2 9 3 9...
Page 87: ...18 2 T 319...
Page 100: ...T 319 26 2...
Page 104: ...T 319 Index 4...
Page 105: ......