Delta PhotoVoltaic RPI-C500, Manual

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I
NSTALLATION
G
UIDE
61
T
ROUBLESHOOTING
E
RROR
M
ESSAGE AND
T
ROUBLESHOOTING
Table 6-4: Fault Message (Continued)
Message Possible cause Action
AC Current High
1. Surge occurs during operation
2. Driver for inverter stage is
defective
3. Switching device is defective
4. Detection circuit malfunction
1. N/A
2. Check the driver circuit in inverter
stage
3. Check all switching devices in
inverter stage
4. Check the detect circuit inside the
inverter
HW CT A Fail
1. Test current loop is broken
2. Detection circuit malfunction
1. Check CT Sensor Wire
2. Check the detection circuit inside
the inverter
HW CT B Fail
1. Test current loop is broken
2. Detection circuit malfunction
1. Check CT Sensor Wire
2. Check the detection circuit inside
the inverter
HW CT C Fail
1. Test current loop is broken
2. Detection circuit malfunction
1. Check CT Sensor Wire
2. Check the detection circuit inside
the inverter
HW AC OCR
1. Large Grid harmonics
2. Switching device is defective
3. Detection circuit malfunction
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
HW ZC Fail
The detection circuit for synchronal
signal malfunction Check the detection circuit for
synchronal signal inside the inverter
AC Aux Fail
1. AC AuxPower offer incorrect
output voltage
2. Detection circuit of AC Auxpower
malfunction
1. Check the connection between
Inverter and AC side
2. Check detection circuit
DC Current High
Input current detection circuit
malfunction
Check input current detection circuit
Table 6-5: Other Message
Message Possible cause Action
Door Opened
1. Door switches are defective
2. Door switches are disconnected
3. Detection circuit malfunction
1. Replace the defective door
switch(es)
2. Check the connections of all
switches
3. Check the detection circuit inside
the inverter