Delta C1000 User Manual

Message Possible cause Action
HW Connect Fail
HW Bus OVR
1. Power cables fall off inside the
inverter
2. Current feedback circuit is
defective
3.
Driver circuit of inverter malfunction
1. Check the power cables inside the
inverter
2. Check the current feedback circuit
inside the inverter
3. Check driver circuit of the inverter
Relay Test Short
1.
The driver circuit for the contactor
malfunction
2. The contacts of contactor are
stuck
1. Check the driver circuit inside the
inverter
2. Replace a new contactor
Relay Test Open
1. Driver circuit for Contactor is
defective
2. Contactor coil is defective
3. The detection accuracy is not
correct for Vgrid and Vout
1. Check the driver circuit for contactor
2. Replace contactor coil
3. Check the Vgrid and Vout voltage
detection accuracy
1. Power BackFeed Occurred
(DC Power < AC Power)
2. Something wrong with AC
Frequency PLL
1. Check the connection between
Solar Panel and Inverter
2. Check the Vgrid and Vout voltage
detection accuracy
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 COMM2
1. Red. CPU is idling
2. The communication connection
is disconnected
1. Check the function of reset pin and
crystal in Red. CPU
2. Check the connection between
Red. CPU and DSP
HW COMM1
1. DSP is idling
2. The communication connection
is disconnected
3. The communication circuit
mal- function
1. Check the function of reset pin and
crystal in DSP
2. Check the connection between
DSP and COMM
3. Check the communication circuit
Table 6-3 : Fault Message (Continued)
67
Troubleshooting

Delta C1000 Specifications

General

Brand	Delta
Model	C1000
Category	Inverter
Language	English