High A/C Amps - Carrier VECTOR 1550 Series Operation & Service Manual

Alarm
Steps
NO.
14

HIGH A/C AMPS


TRIGGER-ON: AC Current Sensor 1 or 2 is greater than 28.5A for 3 seconds.

UNIT CONTROL:

RESET CONDITION: Auto reset after 14 minutes if the AC current sensor readings are less than
27 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 (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 Check Generator Voltage (If Used When Alarm Occurred)
a. Check voltage at GENCON L1-L2,
L1-L3, L2-L3.
Check Power Source Voltage (If Used When Alarm Occurred)
2
a. Check voltage at PSCON L1-L2,
L1-L3, L2-L3.
3 Check Voltage Output From Contactors
a. Check voltage at GENCON T1-T2,
T1-T3, T2-T3.
b. Check voltage at CCON with com-
pressor operating. T1-T2, T1-T3,
T2-T3.
4 Verify AC Current Sensor Accuracy
a. Place the SROS in the
START / RUN position.
Perform Pretrip Check
5
a. Clear Active Alarm list, then run
Pretrip & check for any new
alarms.
6 Check High Voltage Components Amp Draw
a. Check condenser fan amp draw for
CDCON on all 3 legs.
b. Check evaporator fan motor amp
draw for 1EVCON on all 3 legs.
c. Check compressor amp draw for
CCON on all 3 legs.
d. Check Lower Evaporator Heater
amp draw for 1HTCON1.
e. Check Upper Evaporator Heater
amp draw for 1HTCON2.
62-61753-21
ALARM / CAUSE
Engine operation: engine and unit shutdown and alarm
Standby operation: Refrigeration system shutdown and alarm with PSCON
still energized.
CORRECTIVE ACTION
Must be within voltage limits shown in Section 2.12.
Must be within voltage limits shown in Section 2.12.
Must be within voltage limits shown in Section 2.12.
Must be within voltage limits shown in Section 2.12.
Unit AC Current #1 and #2 reading in Data List must
be 0.0 ± 1.0 amp.
Any active alarms must be corrected and cleared be-
fore proceeding.
The unit must be running for these tests to be per-
formed. Refer to Section 2.11 for correct electrical val-
ues.
7-8