Carrier VECTOR 6500 Operation & Service Manual page 151

Alarm
Steps
NO.
23 A/C CURRENT OVER LIMIT
•
TRIGGER ON: The high voltage amp draw is over the limit shown in the following table for more
than 10 seconds.
Engine High / Low Speed, Standby Cool or Pretrip
Engine Low Speed or Standby Heat
Engine High Speed Defrost (With heaters energized)
Engine Low Speed or Standby Heat Defrost
Engine Low Speed or Standby Null
Engine or Standby Natural Defrost (when heaters are de-energized)
•
UNIT CONTROL:
•
RESET CONDITION: Auto reset after 15 minutes or alarm may be manually reset via keypad or by
turning the unit OFF, then back ON.
NOTE: Follow the steps below until a problem is found. Once a repair or correction has been made, the active
alarm should clear itself (see reset condition above). Operate the unit through the appropriate modes to see if
any active alarm occurs. Continue with the steps below as necessary.
1 Perform Pretrip.
Clear Active Alarm list, then run Pre-
trip & check for any new alarms.
2 Check Configurations for Correct Maximum Amps Settings
a. Check DIESEL MAX GEN AMPS
configuration setting.
b. Check STANDBY MAX GEN AMPS
configuration setting.
c. Check STARTUP MAX AMPS con-
figuration setting.
d. Check DIESEL OFFSET MAX
AMPS configuration setting.
3 Check For Electrical Failure In System
a. Check electrical motors.
b. Check for defective wiring.
c. Check for defective contactor.
Additional steps on the next page.
62-11389
Alarm/Cause
CONDITION
Engine High Speed Heat
Engine High/Low Speed or Null
Engine Operation: refrigeration system shutdown and alarm.
Standby Operation: refrigeration system shutdown and alarm with PSCON
still energized.
Corrective Action
Any active alarms must be corrected and cleared be-
fore proceeding.
Setting should be 24 - 25 Amps. Maximum recom-
mended setting is 25 Amps. Minimum recommended
setting is 22 Amps.
Setting should be 22 - 25 Amps. Maximum recom-
mended setting is 25 Amps. Minimum recommended
setting is 22 Amps.
Setting should be 15 - 19 Amps. Maximum recom-
mended setting is 19 Amps.
Setting should be 4 Amps.
Visually inspect condenser fans and evaporator fan
for damage to motor or fan blade, or for foreign ma-
terial obstructing the movement of the fan. Listen for
noise caused by failed bearing or motor obstruction.
Check for discolored wiring at contactors and loose
connections.
Remove and replace any suspected contactor(s).
7−18
DRAW
30A
18A
14A
16A
12A
8A
8A
10A