Check Suction Temperature Sensor
refrigeration
Description
Compressor Suction Temperature Sensor is out of range; the unit gives an alarm only in Engine and Shore Power operation.
Activation Conditions
Compressor Suction Temperature Sensor (CST) is not within the range of -53 to +158°F (-47 to +70° C.)
Unit Behavior
Engine and Shore Power Operation (Alarm only)
Reset Conditions
Auto reset when sensor is in range or, alarm may be manually reset from the AI, Cabin Tech, or by turning the unit off and then back on again.
Corrective Actions
1. Check Sensor a. Inspect sensor and connector. Verify there is no damage to sensor, and no damage, moisture, or corrosion in connector. b. Check sensor resistance 10,000 Ohms @ 77°F (25°C.) See Table 8–3 for complete table of temperatures and resistance values. 2. Check Sensor Wiring a. Inspect connector pins and terminals at sensor and connector CCM J2- 5 and J2-14. Verify there is no physical damage to harness, and no damage, moisture, or corrosion in connectors. b. Disconnect sensor from harness (Unit Powered ON). Check for 3.0 ± 0.1 VDC volts at harness plug between pins. This verifies microprocessor output and wiring connections to the sensor.