Battery Voltage Too High
electrical
Description
Battery voltage at the main microprocessor is greater than 17 VDC; engine operation shuts down the engine and unit and alarms, and electric operation shuts down refrigeration and alarms with PSCON still energized.
Activation Conditions
Battery voltage at the main microprocessor is greater than 17 VDC.
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 15 minutes when the voltage at the main microprocessor is between 11 and 14 VDC, or alarm may be manually reset using the display mounted keys or by turning the unit off, then back on again.
Corrective Actions
1. Check Battery Voltage a. Test voltage at battery with unit off. Must be between 11-16 VDC. b. Test voltage at battery with unit running. Must be between 12-16 VDC. NOTE Voltage with unit running should always be higher than voltage with unit off due to battery charging. 2. Check Battery Charger Voltage at the Power Module a. Test voltage at ALT+ in the PM with unit off. Must be between 11-16 VDC. b. Test voltage at ALT+ in the PM with unit running. Must be between 12-16 VDC. c. Check Unit Data voltage reading. Must be within 0.5 VDC of reading obtained at ALT+. If voltages are out with unit running, check Battery Charger. Refer to Section 8.10.11.