Carrier PrimeLINE 69NT40-561-200 Operation And Service Manual page 87

AL71 SECONDARY RETURN SENSOR (RRS)
Cause: Secondary Return Sensor (RRS) is out of range.
Component
Corrective Action If P5 passes, no further action is required.
Corrective Action If P5 fails, replace the defective sensor as determined by P5. Refer
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
Corrective Action Power cycle unit.
AL96 SCRUBBER ROTATIONAL FAILURE - OPTIONAL FEATURE
Cause: Feedback from the Scrubber Motor to the controller is not sensed when the motor is turning.
Troubleshooting Check to see if Scrubber Fuse is blown. Replace Fuse if necessary.
Troubleshooting Run Test Mode and verify scrubber bed is turning. If back panel cannot
Troubleshooting Once it has been verified that the scrubber motor is rotating check the
If the controller is configured for four probes without a DataCORDER, the DataCORDER alarms AL70 and
AL71 will be processed as Controller alarms AL70 and AL71. Refer to
Secondary Return Sensor (RRS)
Troubleshooting Perform pre-trip P5.
to Temperature Sensor Service
Refrigeration System
Troubleshooting Ensure unit is operating correctly.
Control Temperature is in In-range.
Any pre-trip mode, resets the timers.
Component Scrubber Fuse
Component Scrubber Motor
be removed to check, verify the scrubber amperage consumption, read
at XS contactor wire XSL1. If between 40 and 200mA, motor is rotating
properly. If no current detected, check and replace FX3. If current spiking
to 350mA for 2 seconds then dropping to 90mA, the scrubber motor is lo-
cated. If scrubber motor is locked, further inspection of the scrubber bed
is required. Unit will control CO
alarm occurs if scrubber inaccessible.
If Scrubber Motor not operating, follow the troubleshooting flowchart in
XtendFresh manual and take appropriate action.
Component Ground Interface Module (GIM)
wiring connections to the GIM module. If all wires secured properly, re-
place the GIM module if one is available. If not, the unit will control CO
using the fresh air solenoids.
Section
with the fresh air solenoid when this
2
Table
4–49
7.28.
4–10.
2
T-362