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4–35
T-362
AL23 Loss of Phase B
Cause:
Controller fails to detect current draw.
Component
Incoming Power
Troubleshooting
Check incoming power source.
Corrective Action
Correct power source as required.
AL24 Compressor IP
Cause:
Compressor internal protector (IP) is open.
Component
Compressor
Troubleshooting
Shut down unit disconnect power and check resistance of compressor windings
at contactor T1-T2, T2-T3.
Corrective Action
Monitor unit, if alarm remains active or is repetitive replace the compressor at the
next available opportunity. See Compressor Service
.
AL25 Condenser IP
Cause:
Condenser fan motor internal protector (IP) is open.
Component
Insufficient Air Flow
Troubleshooting
Shut down unit and check condenser fan for obstructions.
Corrective Action
Remove obstructions.
Component
Condenser Fan Motor
Troubleshooting
Shut down unit, disconnect power and check Condenser Fan Motor IP at plug
connection pins 4 & 6.
Corrective Action
Replace defective condenser fan motor. See Condenser Fan Motor Assembly
AL26 All Sensors Failure: Supply / Return Probes
Cause:
Sensors out of range.
Component
All sensors detected as out of range.
Troubleshooting
Perform pre-trip P5.
Corrective Action
If P5 passes, no further action is required.
Corrective Action
If P5 fails, replace the defective sensor as determined by P5. See Temperature
AL27 Analog to Digital Accuracy Failure
Cause:
Controller AD converter faulty.
Component
Controller
Troubleshooting
Power cycle the unit. If the alarm persists, it indicates a defective microprocessor.
Corrective Action
Replace defective microprocessor. See Controller Service
.
AL28 Low Suction Pressure
Cause:
Suction pressure too low for normal operation.
Component
N/A
Troubleshooting
Power cycle the unit.
Table 4–5 Alarm Indications and Descriptions
Summary of Contents for PrimeLINE 69NT40-561-200
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Page 184: ...T 362 8 2 ELECTRICAL WIRING SCHEMATIC AND DIAGRAMS Figure 8 2 Schematic Diagram ...