Delta C1000 Operation And Installation Manual page 68

Troubleshooting
Message
HW AC OCR
AC Aux Fail
DC Current High
Message
Door Opened
* F / W will be updated periodically.
Possible cause
1. Large Grid harmonics
2. Switching device is defective
3. Detection circuit malfunction
1. AC AuxPower offer incorrect
output voltage
2. Detection circuit of AC Auxpower
malfunction
Input current detection circuit
malfunction
Table 6-3 : Fault Message (Continued)
Possible cause
1. Door switches are defective
2. Door switches are disconnected
3. Detection circuit malfunction
Table 6-4 : Other Message
1. Check the utility waveform.
Grid connection of inverter need to
be far away from non-linear load if
necessary
2. Check all switching devices in
inverter stage
3. Check the detection circuit inside
the inverter
1. Check the connection between
Inverter and AC side
2. Check detection circuit
Check input current detection circuit
1. Replace the defective door switch(es)
2. Check the connections of all switches
3. Check the detection circuit inside the
inverter
68
Action
Action