Table 6-3D: Fault Codes & Messages - Delta M42U Operation And Installation Manual

Message
1. Test current loop is broken
HW CT B Fail
2. CTP4 is defective
(F43)
3. Detection circuit malfunction
1. Test current loop is broken
HW CT C Fail
2. CTP5 is defective
(F44)
3. Detection circuit malfunction
1. Large Grid harmonics
HW AC OCR
2. Switching device is defective
(F45)
3. Detection circuit malfunction
AFCI Circuit
1. AFCI is not installed.
Fail
2. AFCI self-test is fail.
(F58)
AFCI Fault The inverter detects Arcing
(F59) occurs.
1. Switching device in boost
DC Cur. High is defective
(F60, F61, 2. Driver for boost is defective
F70, F71) 3. Input current detection
circuit malfunction
HW DC RLY One or more DC relays are
(F76) abnormal
Table 6-3D: Fault Codes & Messages
Possible cause
Error message and Trouble Shooting
Contact customer service for technical
support
Contact customer service for technical
support
1. Check the utility waveform. Grid connection
of inverter needs to be far away from
non-linear load if necessary
2. Check all switching devices in inverter
stage
3. Contact our customer service for
technical support
Check the AFCI detection circuit board to
insure proper connections
Contact customer service for technical
support
Check PV array cables for replacement
1. Check all switching device in boost
2. Check the driver circuit for boost inside
the inverter
3. Check input current detection circuit
Contact customer service for technical
support
91
Action