Check Remote Temperature Sensor 3
refrigeration
Description
A remote temperature sensor is out of range, and the unit gives alarm only in engine and electric operation.
Activation Conditions
Remote Temperature Sensor (REMSN1, REMSN2 or REMSN3) is not within the range of -53 to +158°F (-47 to +70°C.)
Unit Behavior
Engine and Electric Operation: Alarm only.
Reset Conditions
Auto Reset when Remote Temperature Sensor is in range or, alarm may be manually reset via keypad or by turning the unit off, then back on again.
Corrective Actions
If a sensor is installed: 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 (Refer to Note 3 in Notes Section) 10,000 Ohms @ 77°F (25°C). Refer to Table 8–5 for chart of resistances for different sensors. 2. Check Sensor Wiring a. Inspect connector pins and terminals at sensor, REM connector and 1-3MSM-7, 19, 8, and 30. (See wiring schematic Section 10.2) 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 Notes Section 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 sensor. If a sensor is not installed: 3. Check Configurations - Any switch/sensor that is not present in the unit should not be Configured “ON”. Correct Configurations. 4. Check REM Connector - Locate and inspect 10 position connector for optional sensors and switches. (See wiring schematic Section 10.2). Connector must have cap on, no corrosion or moisture inside connector. If there is a problem with the connector and there are no remote sensors or switches in the unit, the connector may be removed and each individual wire separated from the others, terminated and insulated with heat shrink.