High A/C Amps
electrical
Description
AC Current Sensor 1, 2, or 3 is greater than 28.5A for three seconds; engine operation shuts down the engine and unit with an alarm, and electric operation shuts refrigeration with PSCON energized.
Activation Conditions
AC Current Sensor 1, 2, or 3 is greater than 28.5A for three 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 to 1CCB. Check related Splice Points. (See wiring schematic Section 10.4) b. Verify there is no physical damage to harness, no damage, moisture, or corrosion in connectors.