Carrier PrimeLINE 69NT40-561-200, Operation And Service Manual

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4–41 T-362
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
Sensor Service Section 7.29 .
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 Refrigeration System
Troubleshooting
Ensure unit is operating correctly.
Corrective Action Power cycle unit.
Control Temperature is in range.
Any pre-trip mode resets the timers.
AL96 Scrubber Rotational Feature (option)
Cause:
Feedback from the Scrubber Motor to the controller is not sensed when the motor is turning.
Component Scrubber Fuse
Troubleshooting
Check to see if Scrubber Fuse is blown. Replace Fuse if necessary.
Component Scrubber Motor
Troubleshooting
Run Test Mode and verify scrubber bed is turning. If back panel cannot 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 located. If scrubber motor
is locked, further inspection of the scrubber bed is required. Unit will control CO
2
with the fresh air solenoid when this 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)
Troubleshooting Once it has been verified that the scrubber motor is rotating, check the 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
2
using the fresh air
solenoids.
NOTICE
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. See Table 4–10 .
Entr
StPt
Enter Set point (Press Arrow & Enter)
Cause: The controller is prompting the operator to enter a setpoint.
LO Low Main Voltage (Function Codes Cd27-38 disabled and NO alarm stored.)
Cause: This message will be alternately displayed with the setpoint whenever the supply voltage is less than
75% of its proper value.
Table 4–5 Alarm Indications and Descriptions