Delta RPI M80U Operation And Installation Manual page 62

Error message and Trouble Shooting
Message
1. Power line is disconnected
HW Con. Fail inside the inverter
(F26) 2. Current feedback circuit is
defective
RCMU Fail 1. RCMU is disconnected
(F27) 2. Detection circuit malfunction
1. One or more relays are
sticking
RLY Short
2. The driver circuit for the
(F28)
relay malfunction
1. One or more relays are
abnormal
2. The driver circuit for the
RLY Open
relay malfunction
(F13, F29)
3. The detection accuracy is
not correct for Vgrid and Vout
1. Not totally independent or
parallel between inputs
2. PV Array short to Ground
Bus Unbal.
3. Driver for boost is defective
(F30)
or disconnected
4. Detection circuit malfunction
1. Driver for boost is defective
2. Voc of PV array is over
1000Vdc
HW Bus OVR
3. Surge occurs during
(F31, F33, F35)
operation
4. Detection circuit malfunction
1. Surge occurs during
operation
AC Cur. High
2. Driver for inverter stage is
(F36, F37, F38,
defective
F39, F40, F41)
3. Switching device is defective
4. Detection circuit malfunction
1. Test current loop is broken
HW CT A Fail
2. CTP3 is defective
(F42)
3. Detection circuit malfunction
Possible cause
FAULT
1. Check the power lines inside the inverter
2. Contact our customer service for
technical support
1. Check the RCMU connection inside the
inverter
2. Contact our customer service for
technical support
Contact our customer service for
technical support
Contact our customer service for
technical support
1. Check the inputs connections
2. Check the PV Array insulation
3. Contact our customer service for
technical support
Contact our customer service for
technical support
Contact our customer service for
technical support
Contact our customer service for
technical support
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