Carrier 69NT40-541-500 Operation And Service Manual page 76

AL68 CPC PRESSURE SENSOR (PS3)
Cause: Condenser Pressure Transducer (CPC) out of range.
Component
Troubleshooting NA
Corrective Action Unit will disable Condenser Pressure Control if configured.
AL69 SUCTION TEMP SENSOR (CPSS)
Cause: Suction Temperature Sensor (CPSS) out of range.
Component
Troubleshooting Test the CPSS. Refer to Temperature Sensor Service,
Corrective Action Replace CPSS if defective. Refer to Temperature Sensor Service,
AL70 SECONDARY SUPPLY SENSOR (SRS)
Cause: Secondary Supply Sensor (SRS) is out of range.
Component
Troubleshooting Perform Pre-trip P5.
Corrective Action If P5 passes, no further action is required.
AL71 SECONDARY RETURN SENSOR (RRS)
Cause: Secondary Return Sensor (RRS) is out of range.
Component
Troubleshooting Perform Pre-trip P5.
Corrective Action If P5 passes, no further action is required.
AL72 CONTROL TEMP OUT OF RANGE
Cause: After the unit goes in-range for 30 minutes then out of range for a continuous 120 minutes.
Component
Troubleshooting Ensure unit is operating correctly.
Corrective Action Power cycle unit.
T-363
Condenser Pressure Transducer (CPC)
Suction Temperature Sensor (CPSS)
7.21.
Secondary Supply Sensor (SRS)
If P5 fails, replace the defective sensor as determined by P5. Refer to Tem-
perature Sensor Service,
Secondary Return Sensor (RRS)
If P5 fails, replace the defective sensor as determined by P5. Refer to Tem-
perature Sensor Service,
Refrigeration System
Control Temperature is in In-range.
Any Pre-trip mode, resets the timers
4–44
Section 7.21.
Section 7.21.
Section 7.21.
Section