Once the inverter encounters voltage spikes (e.g. struck by lighting),
SPD will protect the inverter and got damaged. If you find a warning message
“SPD Fail” shown on display panel, please follow the steps below to replace
the SPD.
1.Switch AC and DC power off and wait until LCD display turn off.
2.Loosen the 6 screws on the front cover. (Figure 6-1)
3.Recognize which SPD unit was damaged.
For DC SPD, find the one that green light was turned off.
For AC SPD, find the one that red bulb was erected. (Figure 6-2)
4.Pull out the damaged unit and replace a new one. (Figure 6-3)
5.Reassemble the inverter. Please be careful the waterproof tape for ensure
the protection degree.
Figure 6-1 Remove front cover
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