HBD PV500-0007M1 User Manual page 69

PV500 series solar pumping inverters
Fault
Fault type
code
Underload alarm
A-LL
Full-water alarm
A-tF
Empty-water alarm The reservoir is empty.
A-tL
Possible cause
The reservoir is empty.
The reservoir is full.
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Dimension drawings
Solutions
panel configuration is proper.
Check the reservoir.
If the user has set the full-water
alarm function, the equipment
automatically stops when the
full-water alarm time reaches the
specified time. In this situation,
the user does not need to
perform any operation.
Otherwise, check whether
terminals are wired incorrectly.
If the user has set the
empty-water alarm function, the
equipment automatically stops
when the empty-water alarm
time reaches the specified time.
In this situation, the user does
not need to perform any
operation. Otherwise, check
whether terminals are wired
incorrectly.