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00125
CHECK COMP DISCHARGE SENSOR
• ACTIVATION: Compressor Discharge Temperature Sensor (CDT) is not within the range of -40° to +392°F
(-40° to +200°C).
• UNIT CONTROL: Alarm Only.
• RESET CONDITION: Auto reset when sensor is in range or, alarm may be manually reset using the dis-
play mounted keys or by turning the unit off, then back on again.
NOTE: Follow the steps below until a problem is found. Once a repair or correction has been made, the active
alarm should clear itself (refer to reset condition above). Operate the unit through the appropriate modes to see if
any active alarm occurs. Continue with the steps below as necessary.
CORRECTIVE ACTIONS:
1.
Check Sensor
a. Inspect sensor & connector. Verify there is no damage to sensor, and no damage, moisture, or cor-
rosion in connector.
b. Check sensor resistance. (Refer to Note 3 in
Section, page 7-2.) 90,000 Ohms @ 77°F
for chart of resistances for different sensors.
2.
Check Sensor Wiring
a. Inspect connector pins & terminals 2MM. (See wiring schematic
.) Verify there is no
physical damage to harness, and no damage, moisture, or corrosion in connectors.
b. Place the system in PC Mode. Refer to Note 2 in
Section, page 7-2. Disconnect sensor from
harness. Check for 3.0 ± 0.1 VDC volts at harness plug between pins. This verifies microprocessor
output and wiring connections to the sensor.
00126
CHECK FUEL SENSOR CIRCUIT
• ACTIVATION: The fuel level sensor is configured “YES” and the reading (in the Unit Data) is less than 2%
for 30 seconds.
• UNIT CONTROL: Alarm Only.
• RESET CONDITION: Auto reset when fuel level is sensed above 4% for 30 seconds or, alarm may be
manually reset using the display mounted keys or by turning the unit off, then back on again.
NOTE: Follow the steps below until a problem is found. Once a repair or correction has been made, the active
alarm should clear itself (refer to reset condition above). Operate the unit through the appropriate modes to see if
any active alarm occurs. Continue with the steps below as necessary.
CORRECTIVE ACTIONS:
1.
Check For Low Fuel Level
Check fuel level in tank. Add fuel as needed.
2.
Check Sensor Fuse & Wiring
a. Perform sensor check procedure. Refer to
.
NOTE
If new sensor is not available, the sensor may be configured OFF temporarily. Refer to
Configurations.
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