MT-30
Installation, Operation & Maintenance
06225-03H.doc
35 of 47
AeroVironment, Inc
Table 5.1 AC Unit Fault Indications
AC Unit Fault Indications
AC Inverter Fault Indicator
On Steady
DC Bus voltage is out of range
Two Pulses
DC Bus is out of regulation
Three Pulses
Inverter Temperature is out of range
DC Converter Fault Indicator
On Steady
Converter Communication Failure
Utility Fault Indicator
On Steady
Startup Failure, Bus Precharge Voltage never reached
Two Pulses
Utility Failure, Utility Frequency is incorrect
Three Pulses
Utility Failure, Utility Amplitude is incorrect
Four Pulses
Utility Cutout, Utility Power has been removed
Isolation Fault
Detection
If a DC Fault is suspected (is the light lit?), measure the
voltage on the Channel A terminal block
Communication Fault Indicator
On Steady
A communication fault has occurred