Carrier Transicold 69NT40-561-001 Operation And Service Manual page 74

Alarm Code Cause
AL14 Controller is unable to
Phase determine the correct
Sequence De- phase relationship.
tect Fault
AL16 Compressor current
Compressor draw is over the calcu-
Current High lated maximum for 10
minutes.
T-340
Table 4–6 Controller Alarm Indications
Components
N/A
Wiring
Current Sensor
Current Sensor
Amperage is in-
deed too high.
Operating Condi-
tions
Monitor Unit
4–38
Troubleshooting
Power cycle the unit.
Check unit wiring.
Confirm pressure read-
ings during start-up; suc-
tion pressure should
decrease and discharge
pressure should in-
crease.
Check Cd41, right most
digit:
If display is 3 or 4 check
compressor / sensor wir-
ing.
If display is 5 the current
sensor is defective.
Compare Cd3 to actual
measured current at wire
T1-T2 or T3 going to the
compressor contactor. If
there is a difference, de-
termine whether this is
caused by current sen-
sor or amp clamp tool.
Confirm supply voltage/
frequency is within spec-
ification and balanced
according to Electrical
Data Section 3.3.
Make sure system pres-
sures are relevant to op-
erating conditions.
Alarm is display only the
alarm may clear itself
during operation.
Corrective Actions
Resetting the unit may
correct problem, monitor
the unit.
Correct wiring.
Replace current sensor if
defective.
Replace current sensor if
defective.
Correct power supply.
Check air flow of con-
denser.
Check Refrigerant
charge, refer to RE-
FRIGERATION SYS-
TEM SERVICE Section
7.3.
If alarm remains active
or is repetitive replace
compressor at next
available opportunity, re-
fer to COMPRESSOR
Service Section 7.8.