Check Remote Temp Sensor 2
refrigeration
Description
Remote temperature sensor is out of range -53 to +158°F (-47 to +70°C); the unit gives alarm only.
Activation Conditions
Remote Temperature Sensor (REMSN1 or REMSN2) is not within the range of -53 to +158°F (-47 to +70°C.)
Unit Behavior
Alarm only.
Reset Conditions
Auto Reset when 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 Section 7.2. Should be 10,000 Ohms @ 77°F (25°C). Refer to Section 1.9.21 for chart of resistances for different sensors. 2. Check Sensor Wiring a. Inspect connector pins and terminals at sensor, REM connector and 2CCB. (See wiring schematic Section 1.) 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 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 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 1). 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.