T-362 4–32
Troubleshooting Check unit wiring.
Confirm pressure readings during start-up; suction pressure should decrease
and discharge pressure should increase.
Corrective Action Correct wiring.
Component Current Sensor
Troubleshooting Check the right-most digit in display at code Cd41.
If display is 3 or 4, check compressor / sensor wiring.
If display is 5, the current sensor is defective.
Corrective Action Replace current sensor if defective.
AL16 Compressor Current High
Cause: Compressor current draw is over the calculated maximum for 10 minutes.
Component Current Sensor
Troubleshooting Compare value at code Cd03 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.
Corrective Action Replace current sensor if defective.
Component Amperage is indeed too high.
Troubleshooting Confirm supply voltage / frequency is within specification and balanced
according to Electrical Data Section 3.3.
Corrective Action Correct power supply.
Component Operating Conditions
Troubleshooting Make sure system pressures are relevant to operating conditions.
Corrective Action Check air flow of condenser.
Check Refrigerant charge. See Refrigeration System Service Section 7.3.
Component Monitor Unit
Troubleshooting Alarm is display only the alarm may clear itself during operation.
Corrective Action If alarm remains active or is repetitive replace compressor at next available
opportunity. See Compressor Service Section 7.9.
AL17 Compressor Pressure Delta Fault
Cause: Compressor has attempted to start in both directions and fails to generate sufficient pressure differential
between SPT and DPT.
Component N/A
Troubleshooting Controller will attempt to restart every 20 minutes and deactivate the alarm if
successful.
Corrective Action Resume normal operation.
Component Discharge Pressure Transducer (DPT)
Troubleshooting Confirm accurate DPT pressure readings. See Manifold Gauge Set Section 7.2.
Corrective Action Replace DPT if defective.
Component Suction Pressure Transducer (SPT)
Troubleshooting Confirm accurate SPT pressure readings. See Manifold Gauge Set Section 7.2.
Corrective Action Replace SPT if defective.
Table 4–5 Alarm Indications and Descriptions
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