Carrier VECTOR 6500, Operation & Service Manual

Page: 141 / 330

7 − 8
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Alarm
NO.
Steps Alarm/Cause Corrective Action
14 HIGH A/C AMPS
•
TRIGGER–ON: AC Current Sensor 1 is greater than 40A or AC Current Sensor 2 is greater than
40A for 3 seconds.
•
UNIT CONTROL: Engine Operation: Alarm will not activate.
Standby Operation: Refrigeration system shutdown and alarm with PSCON
still energized.
•
RESET CONDITION: Auto reset after 15 minutes if the AC current sensor reading is less than
38 amps or alarm may be manually reset via keypad or by turning 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 Check Generator Voltage (If Used When Alarm Occurred)
Check voltage at GENCON L1-L2,
L1-L3, L2-L3.
Must be nominal 460 VAC
2 Check Power Source Voltage (If Used When Alarm Occurred)
Check voltage at PSCON L1-L2,
L1-L3, L2-L3.
Must be nominal 460 VAC
3 Check Voltage Output From Contactors
a. Check voltage at GENCON T1-T2,
T1-T3, T2-T3.
Must be nominal 460 VAC
b. Check voltage at CCON with
compressor operating. T1-T2,
T1-T3, T2-T3.
Must be nominal 460 VAC
4 Verify AC Current Sensor Accuracy
Power the microprocessor. Refer to
Note 2, page 7 − 2
Unit AC Current #1 and #2 reading in Data List must
be 0.0
"
1.0 amp.
5 Perform Pretrip Check
Clear Active Alarm list, then run Pre-
trip & check for any new alarms.
Any active alarms must be corrected and cleared
before proceeding.
6 Check High Voltage Components Amp Draw
a. Check condenser fan amp draw at
CDCON on all 3 legs.
The unit must be running for these tests to be per-
formed. Refer to Section 2.11 for correct electrical
values.
b. Check evaporator fan motor amp
draw at 1EVCON, 2EVCON &
3EVCON (if applicable) on all 3
legs.
c. Check compressor amp draw at
CCON on all 3 legs.
d. Check evaporator heater amp draw
at 1HTCON1, 1HTCON2,
2HTCON1, 2HTCON2, 3HTCON1
AND 3HTCON2 (if applicable) on all
3 legs.