Delta RPI H3A User Manual

41
ERROR
Message Possible cause Action
A24:
Residual
Curr Over
Rating
1. PV array insulation fault
2. Large PV array
capacitance between
Plus to Ground or Minus
to Ground
3. Either side of boost
driver or boost choke
malfunction
4. Detection circuit
malfunction
1. Check the insulation of Solar
inputs
2. Check the capacitance
(+ <-> GND & - <-> GND),
must < 2.5uF. Install an
external transformer if
necessary
3. Check boost driver & boost
choke
4. Check the detection circuit
inside the inverter
A27: RCMU
Circuit Fail
1. RCMU is disconnected
2. Detection circuit
malfunction
1. Check the RCMU connection
inside the inverter
2. Check the detection circuit
inside the inverter
A28: Relay
Short
1. One or more relays are
sticking
2. The driver circuit for the
relay malfunction
1. Replace the defective relay(s)
2. Check the driver circuit inside
the inverter
A29: Relay
Open
1. One or more relays are
abnormal
2. The driver circuit for the
relay malfunction
3. The detection accuracy
is not correct for V
grid
and V
out
1. Replace the defective relay(s)
2. Check the driver circuit inside
the inverter
3. Check the V
grid
and V
out
voltage detection accuracy

Delta RPI H3A Specifications

General

Brand	Delta
Model	RPI H3A
Category	Inverter
Language	English