Carrier VECTOR 6500 Operation & Service Manual page 212

Alarm
Steps
NO.
P157 CHECK BATTERY CURRENT
•
TRIGGER–ON: With all circuits off, current flow of more than 1.5 amps is detected in the 12 VDC
electrical circuits.
NOTE: If this alarm occurs, Pretrip Test #2 will not be performed. You will need to run
pretrip again.
•
UNIT CONTROL:
•
RESET CONDITION: Auto Reset if Pretrip is started again, or alarm may be manually reset via
keypad or by turning the unit off, then back on again.
NOTE: Follow the steps below until a problem is found. Once a repair or correction has been made, clear the
alarm(s). (See Note 1 page 7−2.) Operate the unit through the appropriate modes to see if any active alarm
occurs. Continue with the steps below as necessary.
1 Check No Load Current Draw
a. Energize circuit (refer to Note 2
page 7−2). Observe current draw
on microprocessor display.
b. Disconnect F5 wire and remove
from inside DC current sensor (see
Figure 2−9, page 2−12). Reconnect
at F5 and power the microprocessor
by toggling the Main Power switch
out of the OFF position.
2 Check Individual Circuits
Isolate individual circuits and test
amp draw.
3 Check for parasitic loads.
Check for electrical loads that are
drawing current with all circuits OFF
P158 CHECK AMBIENT AIR SENSOR
•
TRIGGER–ON: Ambient Air Temperature Sensor (AAT) is not within the range of -53 to +158°F
(-47 to +70°C.)
•
UNIT CONTROL:
•
RESET CONDITION: Auto Reset if Pretrip is started again, or alarm may be manually reset via
keypad or by turning the unit off, then back on again.
Check Sensor - refer to procedure for alarm 121
Alarm/Cause
Engine and Standby Operation: Pretrip will fail and display
"PRETRIP FAIL AND COMPLETED".
Engine and Standby Operation: Pretrip will fail and display
"PRETRIP FAIL AND COMPLETED".
7−79
Corrective Action
Reading is less than 1.5 Amps.
Without wire in sensor, reading should be 0 +/- 1
amp.
NOTE: Ensure wire is rerouted through sensor prior
to returning unit to service.
Must be in range. (Refer to Section 2.12 for correct
electrical values.)
Check for non-factory installed devices such as lift
gates, inside lights, satellite systems, etc. These
devices must be wired so as to not draw current
during Pretrip testing.
62-11389