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

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4–39 T-362
Corrective Action Replace heater(s) if defective. See Evaporator Heater Removal and
Replacement Section 7.16 .
Component
Contactor
Troubleshooting Check voltage at heater contactor on the heater side.
Corrective Action
If no voltage present, replace heater contactor if defective.
AL62 O2 Out of Range
Cause: This is a notification alarm and does not pose a risk to fresh produce. It is triggered when there is an
indication that O2 level is rising after reaching its setpoint (+ 1%). If O2 level exceeds 4% above setpoint,
the alarm is activated. The alarm does not activate if the unit was pre-tripped or trip started between last
reaching its O2 setpoint and exceeding the plus 4%, or if power has been turned off for eight hours. The
alarm is deactivated if O2 drops below setpoint (+ 1%) or if a Pre-Trip or Trip Start is performed.
Component
Scrubber Failure
Troubleshooting See the troubleshooting of the Scrubber Motor in the AL29 alarm.
Component
XtendFRESH Solenoid Valves
Troubleshooting See the troubleshooting of the Solenoid Air Vent in the AL29 alarm.
Component
Container Air Tightness
Troubleshooting Seal container where possible (access panels, rear doors, mounting hardware,
etc).
AL63 Current Limit
Cause:
Unit operating above current limit.
Component Refrigeration System
Troubleshooting
Check unit for air flow restrictions.
Corrective Action Clean or remove any debris from coils.
Troubleshooting
Check unit for proper operation.
Corrective Action Repair as needed.
Component
Power supply
Troubleshooting Confirm supply voltage/frequency is within specification and balanced according
to Electrical Data Section 3.3 .
Corrective Action
Correct power supply.
Component Current limit set too low
Troubleshooting
Check current limit setting Code Cd32.
Corrective Action The current limit can be raised (maximum of 23 amps) using Cd32.
AL64 Discharge Temperature Sensor (CPDS)
Cause:
Compressor Discharge Temperature Sensor (CPDS) out of range.
Component Compressor Discharge Temperature Sensor (CPDS).
Troubleshooting
Test the CPDS. See Sensor Checkout Procedure,
Section 7.29.2
.
Corrective Action Replace the CPDS if defective. See Sensor Replacement Section 7.29 .
Table 4–5 Alarm Indications and Descriptions