37 Total Current Too Low (Log Alarm)

Thermo King Alarm Code

Description

Corrective Action

Total Current Too Low (Log Alarm) Compressor Start-up: Unit or component current draw is 50% below expected amps for 4 minutes. Indicates: Defective or open fuse CB 7A Defective or open high pressure cutout switch Defective evaporator high temperature protection switch  Defective or open motor internal high temperature protection switch Unit on water-cooled condensing with no water flow Defective condenser coil sensor or sensor location

Check LCD display for High Pressure Cutout message. Enter Manual Function Test menu and test (operate) each component. Check volts and amps to determine which component has low amp draw. Check volt and ampere meter.