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3
−
27
T-364
6 Controller Alarm Indications (Sheet 2 of 8)
Alarm Code
Cause
Components
Troubleshooting
Corrective Actions
AL16
Compressor
Current High
Compressor current
draw is over the
calculated maximum
for 10 minutes.
Current Sensor
Compare Cd3 to actual
measured current at wire
T1-T2 or T3 going to the
compressor contactor. If
there is a difference,
determine whether this is
caused by current sensor
or amp clamp tool.
Replace current sensor
if defective.
Amperage is
indeed too high.
Confirm supply voltage/fre-
quency is within specifica-
tion and balanced accord-
ing to Electrical Data Sec-
Correct power supply.
Operating
Conditions
Make sure system
pressures are relevant to
operating conditions.
Check air flow of
condenser.
Check Refrigerant
charge, refer to
REFRIGERATION
SYSTEM SERVICE
Monitor Unit
Alarm is display only the
alarm may clear itself
during operation
If alarm remains active
or is repetitive replace
compressor at next
available opportunity,
refer to COMPRESSOR
AL17
Compressor
Pressure
Delta Fault
Compressor has
attempted to start in
both directions and
fails to generate
sufficient pressure
differential between
SPT and DPT.
N/A
Controller will attempt
restart every 20 minutes
and deactivate the alarm if
successful.
Resume normal
operation.
Discharge
Pressure
Transducer (DPT)
Confirm accurate DPT
pressure readings, refer to
MANIFOLD GAUGE SET
Replace DPT if
defective.
Suction Pressure
Transducer (SPT)
Confirm accurate SPT
pressure readings, refer to
MANIFOLD GAUGE SET
Replace SPT if
defective.
Monitor unit
Alarm is display only the
alarm may clear itself
during operation.
If alarm remains active
or is repetitive replace
compressor at next
available opportunity.
Summary of Contents for 69NT40-561-201
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