HW COMM2
(Red COMM
Fault)
Internal fault
Contact your inverter supplier.
F22
HW COMM1
(DSP COMM
Fault)
Internal fault
Contact your inverter supplier.
F23
Ground Cur.
(Ground Cur.
High)
Residual current over the limit
DC > 150mA
Check the insulation of DC wiring.
F24
RCMU Fail
(RCMU Fault) Internal device fault
Contact your inverter supplier.
F27
RLY Short
(AC RLY Short)
Internal device fault
Contact your inverter supplier.
F28
RLY Open
(AC RLY Open) Internal device fault
Contact your inverter supplier.
F29
Bus Unbal.
(Bus Unbalance) Internal fault
Contact your inverter supplier.
F30
HW Bus OVR
(Bus Voltage
High)
HW Bus OVR
(Bus Voltage
High)
HW Bus OVR
(Bus Voltage
High)
Internal fault
Contact your inverter supplier.
F31
Fault
Message
Cause
Action
Internal fault
Contact your inverter supplier.
Internal fault
Contact your inverter supplier.
AC Cur. High
(AC Current
High)
AC Cur. High
(AC Current
High)
Grid current >135% rated and
keep over 50ms
Contact your inverter supplier.
Grid current >125% rated and
keep over 5s
Contact your inverter supplier.
HW CT
(AC CT Fault)
Internal device fault
Contact your inverter supplier.
HW AC OCR
(AC Current
High)
AC current over the limit
20 times within 2s
Check AC and DC wiring for ground faults.
Inverter may be struck by the lighting.
Check the whole wiring of hybrid system.
If this fault occurs often, please contact
your inverter supplier.
Code
F33
F35
F36
F37
F42
F45
SA OPP
(SA Over Load) System overload
In standalone mode, PV and BT power is
insufficient to supply the home load.
Please reduce the load.
F48
61
Error message and Trouble Shooting
