Notes - Carrier VECTOR 6500 Operation & Service Manual

7.2 NOTES

Note 1 The active alarm list may be cleared by
scrolling to the end of the list. "LIST END, =
TO CLEAR ALARMS" will appear in the
MessageCenter. Pressing = will inactivate
the alarms. That is: the alarm is "cleared"
from the active alarm list and moved to the
inactive alarm list for later review if the
condition that caused the alarm has been
corrected. When Shutdown Alarms are
cleared, the unit will attempt to restart. When
non-Shutdown Alarms are cleared, there will
be no noticeable change in the unit's
operation.
The Inactive Alarm list is cleared in the same
way. When the inactive alarm list is cleared
both the inactive and active lists are cleared.
Clearing the inactive alarm list removes the
alarm from the microprocessor.
Note 2 Many electrical circuits may be tested by
powering the microprocessor without starting
the unit. Two methods are available to do this.
METHOD ONE:
Place the microprocessor in PC Mode. Refer
to Section 5.3.
METHOD TWO:
Set the NO A/C POWER Configuration to
ALARM & SHUTDOWN and ensure the unit
is disconnected from standby power. Start
the unit in standby:
For units equipped with a Main Power switch
switch labeled
(DOES), place the DOES in the STANDBY
position.
For units equipped with a Main Power switch
labeled START/RUN-OFF (SROS), place the
62-11389
ENGINE/OFF/STANDBY
switch labeled STANDBY/ENGINE (DES) in
the STANDBY position and then place the
SROS in the START/RUN position.
Note 3 Sensors may be tested at the component
plug. The sensor and interconnecting wiring
may also be tested at the 1MP plug. Remove
plug and, using an ohmmeter, measure
resistance. Be careful not to damage the
connector pins. (Refer to Section 8.9.10 for
chart of resistances for different sensors.)
Note 4 The switches, (Remote 1 & 2, Door, High
Pressure, Engine Oil Pressure, Defrost Air
and Evaporator High Temperature 1, 2 or 3)
may be tested at the component plug. The
switch and interconnecting wiring may also
be tested at the 1MP, 2MP, OC or EVC plug.
Remove plug and, referring to the wiring
schematic, check for voltage from the micro-
processor through the switch to ground or
from the voltage source through the switch to
the microprocessor as applicable.
Note 5 Some tests can only be conducted while the
unit is operating. The unit may be started au-
tomatically in either Engine Operation or
Standby Operation.
For units equipped with a Main Power switch
labeled ENGINE/OFF/STANDBY (DOES),
place the DOES in the ENGINE or STANDBY
position as desired.
For units equipped with a Main Power switch
labeled START/RUN-OFF (SROS), place the
switch labeled STANDBY/ENGINE (DES) in
the ENGINE or STANDBY position as
desired and then place the SROS in the
START/RUN position.
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