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T-359
4–32
AL14
Phase
Sequence
Detect Fault
Controller is unable to
determine the correct
phase relationship.
N/A
Power cycle the unit.
Resetting the unit may cor-
rect problem, monitor the
unit.
Wiring
Check unit wiring.
Confirm pressure read-
ings during start-up; suc-
tion pressure should
decrease and discharge
pressure should in-
crease.
Correct wiring.
Current Sensor
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.
Replace current
sensor if defective.
AL16
Compressor
Current High
Compressor current
draw is over the calcu-
lated 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, de-
termine whether this is
caused by current sensor
or amp clamp tool.
Replace current
sensor if defective.
Amperage is
indeed too high.
Confirm supply voltage/
frequency is within speci-
fication and balanced ac-
cording to Electrical Data
Correct power supply.
Operating
Conditions
Make sure system pres-
sures 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 com-
pressor at next available
opportunity,
refer to COMPRESSOR
Service
Table 4–6 Controller Alarm Indications
CODE #
CAUSE
COMPONENTS
TROUBLESHOOTING
CORRECTIVE ACTIONS
Summary of Contents for 69NT40-561-019
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