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4–49
T-365
AL57
AMBIENT SENSOR (AMBS)
Cause:
Invalid Ambient Temperature Sensor (AMBS) reading.
Component
Ambient Temperature Sensor (AMBS)
Troubleshooting
Test the AMBS, refer to Sensor Checkout Procedure
Corrective Action
Replace AMBS if defective, refer to TEMPERATURE SENSOR Ser-
vice
AL58
COMPRESSOR HIGH PRESSURE SAFETY (HPS)
Cause:
High pressure safety switch remains open for at least one minute.
Component
High Pressure Switch (HPS)
Troubleshooting
Test the HPS; refer to Checking High Pressure Switch,
Corrective Action
Replace HPS if defective, refer to Sensor Replacement,
.
Component
Refrigeration System
Troubleshooting
Check unit for air flow restrictions.
Corrective Action
Clean or remove any debris from coils.
AL59
HEATER TERMINATION THERMOSTAT (HTT)
Cause:
Heat Termination Thermostat (HTT) is open.
Component
Heat Termination Thermostat (HTT)
Troubleshooting
Check for 24 volts at test point TP10, if no voltage at TP10 after unit
has reached set point HTT is open.
Corrective Action
Replace HTT if defective, refer to Sensor Replacement
.
AL60
DEFROST TEMPERATURE SENSOR (DTS)
Cause:
Failure of the Defrost Temperature Sensor (DTS) to open.
Component
Defrost Temperature Sensor (DTS)
Troubleshooting
Test the DTS; refer to Sensor Checkout Procedure
.
Corrective Action
Replace the DTS if defective, refer to Sensor Replacement
.
Summary of Contents for 69NT40-561-300
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Page 164: ...T 365 8 2 Figure 8 2 Unit Wiring Diagram Based on Drawing 62ï11755 ...
Page 165: ...8 3 T 365 Figure 8 3 Wiring Diagram Based on Drawing 62ï11755 ...
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