Carrier VECTOR 1550 Series - A;C Current over Limit

62-61753-21
7-17
Alarm
NO.
Steps
ALARM / CAUSE
CORRECTIVE ACTION
23 A/C CURRENT OVER LIMIT
 TRIGGER ON: The high voltage amp draw is over the following limit for more than 10 seconds.
Mode
Diesel High Speed (AMPS)
Diesel Low Speed or Standby (AMPS)
Cooling
24
24
Heating
168
14
Normal Defrost
16
12
Null or Natural Defrost
10
8
Engine Off
24
24
 UNIT CONTROL: Engine operation: refrigeration system shutdown and alarm.
Standby operation: refrigeration system shutdown and alarm with PSCON
still energized.
 RESET CONDITION: Auto reset after 15 minutes or alarm may be manually reset via keypad or by
turning the unit OFF, then back ON.
1
Perform Pretrip Check.
NOTE: Follow the steps below until a problem is found. Once a repair or correction has been made, the active
alarm should clear itself (refer to 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 Check.
a. Clear Active Alarm list, then run
Pretrip & check for any new
alarms.
Any active alarms must be corrected and cleared be-
fore proceeding.
2
Check Configurations for Correct Maximum Amps Settings
a. Check Configuration setting for:
DIESEL MAX GEN AMPS,
STANDBY MAX GEN AMPS,
STARTUP MAX AMPS & DIESEL
OFFSET MAX AMPS
Setting should be factory default only - refer to Section
5.1.1
3
Check For Electrical Failure In System
a. Check electrical motors.
Visually inspect condenser and evaporator fan motors
for damage to motor or fan blade, or for foreign materi-
al obstructing the movement of the motor. Listen for
noise caused by failed bearing or motor obstruction.
b. Check for defective wiring.
Check for discolored wiring at contactors and loose
connections.
c. Check for defective contactor.
Remove and replace any suspected contactor(s).
4
Check High Voltage Components Amp Draw
a. Check condenser fan amp draw on
all legs.
These checks must be made with the unit operating.
WARNING
Caution and good electrical practices must
be used when working around and with
high voltage circuits.
Verify that all three actual amperage readings for each
component are within 10% of each other, and are with-
in the values shown in Section 2.11.
b. Check evaporator fan motor amp
draw on all 3 legs.
c. Check compressor amp draw on
all 3 legs.
d. Check Heater amp draw for
1HTCON1.
e. Check Heater amp draw for
1HTCON2.
Additional steps on the next page.