Delta M80U User Manual

Table 6-1B: Error Codes and Messages
Message Possible cause Action
Solar2
High
(E31)
1. MPPT 2 input voltage is over
1000Vdc
2. Detection circuit malfunction
1. Modify the solar array setting, and
make the Voc less than 1000Vdc
2. Contact customer service for
technical support
Insulation
(E34)
1. PV array insulation fault
2. Large PV array capacitance
between Plus to Ground or
Minus to Ground or both.
3. Detection circuit malfunction
1. Check the insulation of Solar inputs
2. Check the capacitance, dry PV panel
if necessary
3. Contact customer service for
technical support
Table 6-2A: Warning Codes and Messages
Message Possible cause Action
Solar1
Low
(W01)
1. MPPT 1 input voltage is under
the limit
2. Some devices were damaged
inside the inverter if the actual
MPPT 1 voltage is close to "0"
3. Detection circuit malfunction
1. Check the MPPT 1 voltage connection
to the inverter terminal
2. Check all switching devices in boost1
3. Contact customer service for
technical support
Solar2
Low
(W02)
1. MPPT2 input voltage is under
the limit
2. Some devices were damaged
inside the inverter if the actual
MPPT 2 voltage is close to "0"
3. Detection circuit malfunction
1. Check the MPPT 2 input voltage
to the inverter terminal
2. Check all switching devices in boost2
3. Contact customer service for
technical support
WB Fan Fail
Int Fan Fail
Ext Fan Fail
(W11)
1. One or more fans are locked
2.
One or more fans are defective
3. One ore more fans are
disconnected
4. Detection circuit malfunction
1. Remove the object that stuck in the fan(s)
2. Replace the defective fan(s)
3. Check the connections of all fans
4. Contact customer service for
technical support
Ext Fan Fail
Int Fan Fail & WB Fan Fail
AC Surge
DC Surge
1. Inverter was struck by lightning.
2. One or more SPD are defective
3. One or more SPD are
disconnected
4. Detection circuit malfunction
5. Wrong connection in AC terminal
1. Check inverter’s status
2. Replace the defective SPD
3. Check the connections of SPDs
4. Check the connection in AC terminal
5. Contact customer service for
technical support
Contact customer service for technical
support
6.2 Warning Codes
104
Error message and Trouble Shooting

Delta M80U Specifications

General

Brand	Delta
Model	M80U
Category	Inverter
Language	English