High A/C Amps
electrical
Description
Any AC current sensor is greater than 28.5A for 3 seconds; engine operation shuts down the engine and unit and alarms, and electric operation shuts down refrigeration and alarms with PSCON still energized.
Activation Conditions
AC Current Sensor 1, 2, or 3 is greater than 28.5A for 3 seconds.
Unit Behavior
Engine Operation: Engine and unit shutdown and alarm. Electric Operation: Refrigeration system shutdown and alarm with PSCON still energized.
Reset Conditions
Auto reset after 14 minutes if AC Current Sensor 1, 2, and 3 reading is less than 27 amps or alarm may be manually reset via keypad or by turning unit off then back on.
Corrective Actions
1. Perform Pretrip Check - Clear Active Alarm list, then run Pretrip and check for any new alarms. Any active alarms must be corrected and cleared before proceeding. 2. Check Current Draw a. Use a clamp around A/C ammeter to check amps at power wires. Must be 1.0 Amp of reading in Unit Data. b. Check A/C amps with compressor running. Must be greater than 5 Amps. c. Compare A/C Amp readings between L1-L2-L3. Maximum allowable difference is 10 Amps. 3. Check Wiring a. Inspect wiring from CT-A to SP-59 to CCB-10, CT-B to SP-58 to CCB-34, CT-C to SP57 to CCB-12. (See wiring schematic Section 10.2) b. Verify there is no physical damage to harness, no damage, moisture, or corrosion in connectors.