Delta RPI M80U Operation And Installation Manual page 45

The surge protection devices (SPD), located on both AC and DC input terminals,
are designed to protect sensitive circuit elements of the inverter from damage
caused by lightning and electrical transient surges. If you find a warning message
"AC Surge" or "DC Surge" 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 4 screws on the front cover of wiring box compartment.
You will see AC and DC SPD as indicated in the figure. (Figure 5-2)
3. Find out which SPD unit was damaged.
For AC SPD, "AC Surge" with show on the corner of the LCD panel. (Figure 5-3)
For DC SPD, "DC Surge" with show on the corner of the LCD panel.
4. Pull out the connector (white; 3 pins at AC side; 2 pins at DC side) and replace
a whole new SPD PCB. (Figure 5-4)
5. Reassemble the inverter. Please be careful of the waterproof seal.
Figure 5-2 : Remove front cover of wiring box compartment
AC SPD
AC SPD
45
Maintenance
DC SPD
M80U
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DC SPD
M80U
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